// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#include "agent/task_worker_pool.h"

#include <pthread.h>
#include <sys/stat.h>

#include <boost/lexical_cast.hpp>
#include <chrono>
#include <csignal>
#include <ctime>
#include <sstream>
#include <string>

#include "common/status.h"
#include "env/env.h"
#include "gen_cpp/Types_types.h"
#include "gutil/strings/substitute.h"
#include "olap/data_dir.h"
#include "olap/olap_common.h"
#include "olap/snapshot_manager.h"
#include "olap/storage_engine.h"
#include "olap/tablet.h"
#include "olap/task/engine_alter_tablet_task.h"
#include "olap/task/engine_batch_load_task.h"
#include "olap/task/engine_checksum_task.h"
#include "olap/task/engine_clone_task.h"
#include "olap/task/engine_publish_version_task.h"
#include "olap/task/engine_storage_migration_task.h"
#include "olap/task/engine_storage_migration_task_v2.h"
#include "olap/utils.h"
#include "runtime/exec_env.h"
#include "runtime/snapshot_loader.h"
#include "service/backend_options.h"
#include "util/doris_metrics.h"
#include "util/file_utils.h"
#include "util/random.h"
#include "util/scoped_cleanup.h"
#include "util/stopwatch.hpp"
#include "util/threadpool.h"
#include "util/trace.h"

namespace doris {

DEFINE_GAUGE_METRIC_PROTOTYPE_2ARG(agent_task_queue_size, MetricUnit::NOUNIT);

const uint32_t TASK_FINISH_MAX_RETRY = 3;
const uint32_t PUBLISH_VERSION_MAX_RETRY = 3;

std::atomic_ulong TaskWorkerPool::_s_report_version(time(nullptr) * 10000);
std::mutex TaskWorkerPool::_s_task_signatures_lock;
std::map<TTaskType::type, std::set<int64_t>> TaskWorkerPool::_s_task_signatures;
FrontendServiceClientCache TaskWorkerPool::_master_service_client_cache;

TaskWorkerPool::TaskWorkerPool(const TaskWorkerType task_worker_type, ExecEnv* env,
                               const TMasterInfo& master_info, ThreadModel thread_model)
        : _master_info(master_info),
          _agent_utils(new AgentUtils()),
          _master_client(new MasterServerClient(_master_info, &_master_service_client_cache)),
          _env(env),
          _stop_background_threads_latch(1),
          _is_work(false),
          _thread_model(thread_model),
          _is_doing_work(false),
          _task_worker_type(task_worker_type) {
    _backend.__set_host(BackendOptions::get_localhost());
    _backend.__set_be_port(config::be_port);
    _backend.__set_http_port(config::webserver_port);

    string task_worker_type_name = TYPE_STRING(task_worker_type);
    _name = strings::Substitute("TaskWorkerPool.$0", task_worker_type_name);

    _metric_entity = DorisMetrics::instance()->metric_registry()->register_entity(
            task_worker_type_name, {{"type", task_worker_type_name}});
    REGISTER_ENTITY_HOOK_METRIC(_metric_entity, this, agent_task_queue_size, [this]() -> uint64_t {
        if (_thread_model == ThreadModel::SINGLE_THREAD) {
            return _is_doing_work.load();
        } else {
            std::lock_guard<std::mutex> lock(_worker_thread_lock);
            return _tasks.size();
        }
    });
}

TaskWorkerPool::~TaskWorkerPool() {
    _stop_background_threads_latch.count_down();
    stop();

    DEREGISTER_ENTITY_HOOK_METRIC(_metric_entity, agent_task_queue_size);
    DorisMetrics::instance()->metric_registry()->deregister_entity(_metric_entity);
}

void TaskWorkerPool::start() {
    // Init task pool and task workers
    _is_work = true;
    if (_thread_model == ThreadModel::SINGLE_THREAD) {
        _worker_count = 1;
    }
    std::function<void()> cb;
    switch (_task_worker_type) {
    case TaskWorkerType::CREATE_TABLE:
        _worker_count = config::create_tablet_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_create_tablet_worker_thread_callback, this);
        break;
    case TaskWorkerType::DROP_TABLE:
        _worker_count = config::drop_tablet_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_drop_tablet_worker_thread_callback, this);
        break;
    case TaskWorkerType::PUSH:
    case TaskWorkerType::REALTIME_PUSH:
        _worker_count =
                config::push_worker_count_normal_priority + config::push_worker_count_high_priority;
        cb = std::bind<void>(&TaskWorkerPool::_push_worker_thread_callback, this);
        break;
    case TaskWorkerType::PUBLISH_VERSION:
        _worker_count = config::publish_version_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_publish_version_worker_thread_callback, this);
        break;
    case TaskWorkerType::CLEAR_TRANSACTION_TASK:
        _worker_count = config::clear_transaction_task_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_clear_transaction_task_worker_thread_callback, this);
        break;
    case TaskWorkerType::DELETE:
        _worker_count = config::delete_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_push_worker_thread_callback, this);
        break;
    case TaskWorkerType::ALTER_TABLE:
        _worker_count = config::alter_tablet_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_alter_tablet_worker_thread_callback, this);
        break;
    case TaskWorkerType::CLONE:
        _worker_count = config::clone_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_clone_worker_thread_callback, this);
        break;
    case TaskWorkerType::STORAGE_MEDIUM_MIGRATE:
        _worker_count = config::storage_medium_migrate_count;
        cb = std::bind<void>(&TaskWorkerPool::_storage_medium_migrate_worker_thread_callback, this);
        break;
    case TaskWorkerType::CHECK_CONSISTENCY:
        _worker_count = config::check_consistency_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_check_consistency_worker_thread_callback, this);
        break;
    case TaskWorkerType::REPORT_TASK:
        cb = std::bind<void>(&TaskWorkerPool::_report_task_worker_thread_callback, this);
        break;
    case TaskWorkerType::REPORT_DISK_STATE:
        cb = std::bind<void>(&TaskWorkerPool::_report_disk_state_worker_thread_callback, this);
        break;
    case TaskWorkerType::REPORT_OLAP_TABLE:
        cb = std::bind<void>(&TaskWorkerPool::_report_tablet_worker_thread_callback, this);
        break;
    case TaskWorkerType::UPLOAD:
        _worker_count = config::upload_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_upload_worker_thread_callback, this);
        break;
    case TaskWorkerType::DOWNLOAD:
        _worker_count = config::download_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_download_worker_thread_callback, this);
        break;
    case TaskWorkerType::MAKE_SNAPSHOT:
        _worker_count = config::make_snapshot_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_make_snapshot_thread_callback, this);
        break;
    case TaskWorkerType::RELEASE_SNAPSHOT:
        _worker_count = config::release_snapshot_worker_count;
        cb = std::bind<void>(&TaskWorkerPool::_release_snapshot_thread_callback, this);
        break;
    case TaskWorkerType::MOVE:
        _worker_count = 1;
        cb = std::bind<void>(&TaskWorkerPool::_move_dir_thread_callback, this);
        break;
    case TaskWorkerType::UPDATE_TABLET_META_INFO:
        _worker_count = 1;
        cb = std::bind<void>(&TaskWorkerPool::_update_tablet_meta_worker_thread_callback, this);
        break;
    case TaskWorkerType::SUBMIT_TABLE_COMPACTION:
        _worker_count = 1;
        cb = std::bind<void>(&TaskWorkerPool::_submit_table_compaction_worker_thread_callback,
                             this);
        break;
    case TaskWorkerType::STORAGE_MEDIUM_MIGRATE_V2:
        _worker_count = 1;
        cb = std::bind<void>(&TaskWorkerPool::_storage_medium_migrate_v2_worker_thread_callback,
                             this);
        break;
    default:
        // pass
        break;
    }
    CHECK(_thread_model == ThreadModel::MULTI_THREADS || _worker_count == 1);

#ifndef BE_TEST
    ThreadPoolBuilder(_name)
            .set_min_threads(_worker_count)
            .set_max_threads(_worker_count)
            .build(&_thread_pool);

    for (int i = 0; i < _worker_count; i++) {
        auto st = _thread_pool->submit_func(cb);
        CHECK(st.ok()) << st.to_string();
    }
#endif
}

void TaskWorkerPool::stop() {
    {
        std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
        _is_work = false;
        _worker_thread_condition_variable.notify_all();
    }
    _thread_pool->shutdown();
}

void TaskWorkerPool::submit_task(const TAgentTaskRequest& task) {
    const TTaskType::type task_type = task.task_type;
    int64_t signature = task.signature;

    std::string type_str;
    EnumToString(TTaskType, task_type, type_str);
    VLOG_CRITICAL << "submitting task. type=" << type_str << ", signature=" << signature;

    if (_register_task_info(task_type, signature)) {
        // Set the receiving time of task so that we can determine whether it is timed out later
        (const_cast<TAgentTaskRequest&>(task)).__set_recv_time(time(nullptr));
        size_t task_count_in_queue = 0;
        {
            std::lock_guard<std::mutex> worker_thread_lock(_worker_thread_lock);
            _tasks.push_back(task);
            task_count_in_queue = _tasks.size();
            _worker_thread_condition_variable.notify_one();
        }
        LOG(INFO) << "success to submit task. type=" << type_str << ", signature=" << signature
                  << ", queue size=" << task_count_in_queue;
    } else {
        LOG(INFO) << "fail to register task. type=" << type_str << ", signature=" << signature;
    }
}

void TaskWorkerPool::notify_thread() {
    _worker_thread_condition_variable.notify_one();
    VLOG_CRITICAL << "notify task worker pool: " << _name;
}

bool TaskWorkerPool::_register_task_info(const TTaskType::type task_type, int64_t signature) {
    lock_guard<std::mutex> task_signatures_lock(_s_task_signatures_lock);
    set<int64_t>& signature_set = _s_task_signatures[task_type];
    return signature_set.insert(signature).second;
}

void TaskWorkerPool::_remove_task_info(const TTaskType::type task_type, int64_t signature) {
    size_t queue_size;
    {
        lock_guard<std::mutex> task_signatures_lock(_s_task_signatures_lock);
        set<int64_t>& signature_set = _s_task_signatures[task_type];
        signature_set.erase(signature);
        queue_size = signature_set.size();
    }

    std::string type_str;
    EnumToString(TTaskType, task_type, type_str);
    VLOG_NOTICE << "remove task info. type=" << type_str << ", signature=" << signature
                << ", queue_size=" << queue_size;
    TRACE("remove task info");
}

void TaskWorkerPool::_finish_task(const TFinishTaskRequest& finish_task_request) {
    // Return result to FE
    TMasterResult result;
    uint32_t try_time = 0;

    while (try_time < TASK_FINISH_MAX_RETRY) {
        DorisMetrics::instance()->finish_task_requests_total->increment(1);
        Status client_status = _master_client->finish_task(finish_task_request, &result);

        if (client_status.ok()) {
            break;
        } else {
            DorisMetrics::instance()->finish_task_requests_failed->increment(1);
            LOG(WARNING) << "finish task failed. type=" << to_string(finish_task_request.task_type)
                         << ", signature=" << finish_task_request.signature
                         << ", status_code=" << result.status.status_code;
            try_time += 1;
        }
        sleep(config::sleep_one_second);
    }
    TRACE("finish task");
}

uint32_t TaskWorkerPool::_get_next_task_index(int32_t thread_count,
                                              std::deque<TAgentTaskRequest>& tasks,
                                              TPriority::type priority) {
    int32_t index = -1;
    deque<TAgentTaskRequest>::size_type task_count = tasks.size();
    for (uint32_t i = 0; i < task_count; ++i) {
        TAgentTaskRequest task = tasks[i];
        if (priority == TPriority::HIGH) {
            if (task.__isset.priority && task.priority == TPriority::HIGH) {
                index = i;
                break;
            }
        }
    }

    if (index == -1) {
        if (priority == TPriority::HIGH) {
            return index;
        }

        index = 0;
    }

    return index;
}

void TaskWorkerPool::_create_tablet_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TCreateTabletReq create_tablet_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            create_tablet_req = agent_task_req.create_tablet_req;
            _tasks.pop_front();
        }

        scoped_refptr<Trace> trace(new Trace);
        MonotonicStopWatch watch;
        watch.start();
        SCOPED_CLEANUP({
            if (watch.elapsed_time() / 1e9 > config::agent_task_trace_threshold_sec) {
                LOG(WARNING) << "Trace:" << std::endl << trace->DumpToString(Trace::INCLUDE_ALL);
            }
        });
        ADOPT_TRACE(trace.get());
        TRACE("start to create tablet $0", create_tablet_req.tablet_id);

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        TStatus task_status;

        std::vector<TTabletInfo> finish_tablet_infos;
        Status create_status = _env->storage_engine()->create_tablet(create_tablet_req);
        if (!create_status.ok()) {
            LOG(WARNING) << "create table failed. status: " << create_status
                         << ", signature: " << agent_task_req.signature;
            status_code = TStatusCode::RUNTIME_ERROR;
        } else {
            ++_s_report_version;
            // get path hash of the created tablet
            TabletSharedPtr tablet = StorageEngine::instance()->tablet_manager()->get_tablet(
                    create_tablet_req.tablet_id);
            DCHECK(tablet != nullptr);
            TTabletInfo tablet_info;
            tablet_info.tablet_id = tablet->table_id();
            tablet_info.schema_hash = tablet->schema_hash();
            tablet_info.version = create_tablet_req.version;
            // Useless but it is a required field in TTabletInfo
            tablet_info.version_hash = 0;
            tablet_info.row_count = 0;
            tablet_info.data_size = 0;
            tablet_info.__set_path_hash(tablet->data_dir()->path_hash());
            tablet_info.__set_replica_id(tablet->replica_id());
            finish_tablet_infos.push_back(tablet_info);
        }

        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_finish_tablet_infos(finish_tablet_infos);
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_report_version(_s_report_version);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_task_status(task_status);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_drop_tablet_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TDropTabletReq drop_tablet_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            drop_tablet_req = agent_task_req.drop_tablet_req;
            _tasks.pop_front();
        }

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        TStatus task_status;
        string err;
        TabletSharedPtr dropped_tablet = StorageEngine::instance()->tablet_manager()->get_tablet(
                drop_tablet_req.tablet_id, false, &err);
        if (dropped_tablet != nullptr) {
            Status drop_status = StorageEngine::instance()->tablet_manager()->drop_tablet(
                    drop_tablet_req.tablet_id, drop_tablet_req.replica_id);
            if (!drop_status.ok()) {
                LOG(WARNING) << "drop table failed! signature: " << agent_task_req.signature;
                error_msgs.push_back("drop table failed!");
                status_code = TStatusCode::RUNTIME_ERROR;
            }
            // if tablet is dropped by fe, then the related txn should also be removed
            StorageEngine::instance()->txn_manager()->force_rollback_tablet_related_txns(
                    dropped_tablet->data_dir()->get_meta(), drop_tablet_req.tablet_id,
                    drop_tablet_req.schema_hash, dropped_tablet->tablet_uid());
        } else {
            status_code = TStatusCode::NOT_FOUND;
            error_msgs.push_back(err);
        }
        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_task_status(task_status);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_alter_tablet_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            _tasks.pop_front();
        }
        int64_t signature = agent_task_req.signature;
        LOG(INFO) << "get alter table task, signature: " << agent_task_req.signature;
        bool is_task_timeout = false;
        if (agent_task_req.__isset.recv_time) {
            int64_t time_elapsed = time(nullptr) - agent_task_req.recv_time;
            if (time_elapsed > config::report_task_interval_seconds * 20) {
                LOG(INFO) << "task elapsed " << time_elapsed
                          << " seconds since it is inserted to queue, it is timeout";
                is_task_timeout = true;
            }
        }
        if (!is_task_timeout) {
            TFinishTaskRequest finish_task_request;
            TTaskType::type task_type = agent_task_req.task_type;
            switch (task_type) {
            case TTaskType::ALTER:
                _alter_tablet(agent_task_req, signature, task_type, &finish_task_request);
                break;
            default:
                // pass
                break;
            }
            _finish_task(finish_task_request);
        }
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_alter_tablet(const TAgentTaskRequest& agent_task_req, int64_t signature,
                                   const TTaskType::type task_type,
                                   TFinishTaskRequest* finish_task_request) {
    Status status = Status::OK();
    TStatus task_status;
    std::vector<string> error_msgs;

    string process_name;
    switch (task_type) {
    case TTaskType::ALTER:
        process_name = "AlterTablet";
        break;
    default:
        std::string task_name;
        EnumToString(TTaskType, task_type, task_name);
        LOG(WARNING) << "schema change type invalid. type: " << task_name
                     << ", signature: " << signature;
        status = Status::NotSupported("Schema change type invalid");
        break;
    }

    // Check last schema change status, if failed delete tablet file
    // Do not need to adjust delete success or not
    // Because if delete failed create rollup will failed
    TTabletId new_tablet_id;
    TSchemaHash new_schema_hash = 0;
    if (status.ok()) {
        new_tablet_id = agent_task_req.alter_tablet_req_v2.new_tablet_id;
        new_schema_hash = agent_task_req.alter_tablet_req_v2.new_schema_hash;
        EngineAlterTabletTask engine_task(agent_task_req.alter_tablet_req_v2);
        Status sc_status = _env->storage_engine()->execute_task(&engine_task);
        if (!sc_status.ok()) {
            if (sc_status.precise_code() == OLAP_ERR_DATA_QUALITY_ERR) {
                error_msgs.push_back("The data quality does not satisfy, please check your data. ");
            }
            status = sc_status;
        } else {
            status = Status::OK();
        }
    }

    if (status.ok()) {
        ++_s_report_version;
        LOG(INFO) << process_name << " finished. signature: " << signature;
    }

    // Return result to fe
    finish_task_request->__set_backend(_backend);
    finish_task_request->__set_report_version(_s_report_version);
    finish_task_request->__set_task_type(task_type);
    finish_task_request->__set_signature(signature);

    std::vector<TTabletInfo> finish_tablet_infos;
    if (status.ok()) {
        TTabletInfo tablet_info;
        status = _get_tablet_info(new_tablet_id, new_schema_hash, signature, &tablet_info);

        if (!status.ok()) {
            LOG(WARNING) << process_name << " success, but get new tablet info failed."
                         << "tablet_id: " << new_tablet_id << ", schema_hash: " << new_schema_hash
                         << ", signature: " << signature;
        } else {
            finish_tablet_infos.push_back(tablet_info);
        }
    }

    if (status.ok()) {
        finish_task_request->__set_finish_tablet_infos(finish_tablet_infos);
        LOG(INFO) << process_name << " success. signature: " << signature;
        error_msgs.push_back(process_name + " success");
    } else {
        LOG(WARNING) << process_name << " failed. signature: " << signature;
        error_msgs.push_back(process_name + " failed");
        error_msgs.push_back("status: " + status.to_string());
    }
    task_status.__set_status_code(status.code());
    task_status.__set_error_msgs(error_msgs);
    finish_task_request->__set_task_status(task_status);
}

void TaskWorkerPool::_push_worker_thread_callback() {
    // gen high priority worker thread
    TPriority::type priority = TPriority::NORMAL;
    int32_t push_worker_count_high_priority = config::push_worker_count_high_priority;
    static uint32_t s_worker_count = 0;
    {
        std::lock_guard<std::mutex> worker_thread_lock(_worker_thread_lock);
        if (s_worker_count < push_worker_count_high_priority) {
            ++s_worker_count;
            priority = TPriority::HIGH;
        }
    }

    while (_is_work) {
        Status status = Status::OK();
        TAgentTaskRequest agent_task_req;
        TPushReq push_req;
        int32_t index = 0;
        do {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            index = _get_next_task_index(config::push_worker_count_normal_priority +
                                                 config::push_worker_count_high_priority,
                                         _tasks, priority);

            if (index < 0) {
                // there is no high priority task. notify other thread to handle normal task
                _worker_thread_condition_variable.notify_one();
                break;
            }

            agent_task_req = _tasks[index];
            push_req = agent_task_req.push_req;
            _tasks.erase(_tasks.begin() + index);
        } while (false);

        if (index < 0) {
            // there is no high priority task in queue
            sleep(1);
            continue;
        }

        LOG(INFO) << "get push task. signature: " << agent_task_req.signature
                  << " priority: " << priority << " push_type: " << push_req.push_type;
        std::vector<TTabletInfo> tablet_infos;

        EngineBatchLoadTask engine_task(push_req, &tablet_infos, agent_task_req.signature, &status);
        _env->storage_engine()->execute_task(&engine_task);
        // Return result to fe
        std::vector<string> error_msgs;
        TStatus task_status;

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        if (push_req.push_type == TPushType::DELETE) {
            finish_task_request.__set_request_version(push_req.version);
        }

        if (status.ok()) {
            VLOG_NOTICE << "push ok. signature: " << agent_task_req.signature
                        << ", push_type: " << push_req.push_type;
            error_msgs.push_back("push success");

            ++_s_report_version;

            task_status.__set_status_code(TStatusCode::OK);
            finish_task_request.__set_finish_tablet_infos(tablet_infos);
        } else {
            LOG(WARNING) << "push failed, error_code: " << status
                         << ", signature: " << agent_task_req.signature;
            error_msgs.push_back("push failed");
            task_status.__set_status_code(TStatusCode::RUNTIME_ERROR);
        }
        task_status.__set_error_msgs(error_msgs);
        finish_task_request.__set_task_status(task_status);
        finish_task_request.__set_report_version(_s_report_version);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_publish_version_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TPublishVersionRequest publish_version_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            publish_version_req = agent_task_req.publish_version_req;
            _tasks.pop_front();
        }

        DorisMetrics::instance()->publish_task_request_total->increment(1);
        VLOG_NOTICE << "get publish version task, signature:" << agent_task_req.signature;

        std::vector<TTabletId> error_tablet_ids;
        std::vector<TTabletId> succ_tablet_ids;
        uint32_t retry_time = 0;
        Status res = Status::OK();
        while (retry_time < PUBLISH_VERSION_MAX_RETRY) {
            error_tablet_ids.clear();
            EnginePublishVersionTask engine_task(publish_version_req, &error_tablet_ids,
                                                 &succ_tablet_ids);
            res = _env->storage_engine()->execute_task(&engine_task);
            if (res.ok()) {
                break;
            } else {
                LOG(WARNING) << "publish version error, retry. [transaction_id="
                             << publish_version_req.transaction_id
                             << ", error_tablets_size=" << error_tablet_ids.size() << "]";
                ++retry_time;
                std::this_thread::sleep_for(std::chrono::seconds(1));
            }
        }

        TFinishTaskRequest finish_task_request;
        if (!res) {
            DorisMetrics::instance()->publish_task_failed_total->increment(1);
            // if publish failed, return failed, FE will ignore this error and
            // check error tablet ids and FE will also republish this task
            LOG(WARNING) << "publish version failed. signature:" << agent_task_req.signature
                         << ", error_code=" << res;
            finish_task_request.__set_error_tablet_ids(error_tablet_ids);
        } else {
            int submit_tablets = 0;
            if (config::enable_quick_compaction && config::quick_compaction_batch_size > 0) {
                for (int i = 0; i < succ_tablet_ids.size(); i++) {
                    TabletSharedPtr tablet =
                            StorageEngine::instance()->tablet_manager()->get_tablet(
                                    succ_tablet_ids[i]);
                    if (tablet != nullptr) {
                        submit_tablets++;
                        tablet->publised_count++;
                        if (tablet->publised_count % config::quick_compaction_batch_size == 0) {
                            StorageEngine::instance()->submit_quick_compaction_task(tablet);
                            LOG(INFO) << "trigger quick compaction succ, tabletid:"
                                      << succ_tablet_ids[i]
                                      << ", publised:" << tablet->publised_count;
                        }
                    } else {
                        LOG(WARNING) << "trigger quick compaction failed, tabletid:"
                                     << succ_tablet_ids[i];
                    }
                }
                LOG(INFO) << "publish_version success. signature:" << agent_task_req.signature
                          << ", size:" << succ_tablet_ids.size();
            }
        }

        res.to_thrift(&finish_task_request.task_status);
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_report_version(_s_report_version);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_clear_transaction_task_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TClearTransactionTaskRequest clear_transaction_task_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            clear_transaction_task_req = agent_task_req.clear_transaction_task_req;
            _tasks.pop_front();
        }
        LOG(INFO) << "get clear transaction task task, signature:" << agent_task_req.signature
                  << ", transaction_id: " << clear_transaction_task_req.transaction_id
                  << ", partition id size: " << clear_transaction_task_req.partition_id.size();

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        TStatus task_status;

        if (clear_transaction_task_req.transaction_id > 0) {
            // transaction_id should be greater than zero.
            // If it is not greater than zero, no need to execute
            // the following clear_transaction_task() function.
            if (!clear_transaction_task_req.partition_id.empty()) {
                _env->storage_engine()->clear_transaction_task(
                        clear_transaction_task_req.transaction_id,
                        clear_transaction_task_req.partition_id);
            } else {
                _env->storage_engine()->clear_transaction_task(
                        clear_transaction_task_req.transaction_id);
            }
            LOG(INFO) << "finish to clear transaction task. signature:" << agent_task_req.signature
                      << ", transaction_id: " << clear_transaction_task_req.transaction_id;
        } else {
            LOG(WARNING) << "invalid transaction id: " << clear_transaction_task_req.transaction_id
                         << ", signature: " << agent_task_req.signature;
        }

        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_task_status(task_status);
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_update_tablet_meta_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TUpdateTabletMetaInfoReq update_tablet_meta_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            update_tablet_meta_req = agent_task_req.update_tablet_meta_info_req;
            _tasks.pop_front();
        }
        LOG(INFO) << "get update tablet meta task, signature:" << agent_task_req.signature;

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        TStatus task_status;

        for (auto tablet_meta_info : update_tablet_meta_req.tabletMetaInfos) {
            TabletSharedPtr tablet = StorageEngine::instance()->tablet_manager()->get_tablet(
                    tablet_meta_info.tablet_id);
            if (tablet == nullptr) {
                LOG(WARNING) << "could not find tablet when update partition id"
                             << " tablet_id=" << tablet_meta_info.tablet_id
                             << " schema_hash=" << tablet_meta_info.schema_hash;
                continue;
            }
            std::lock_guard<std::shared_mutex> wrlock(tablet->get_header_lock());
            // update tablet meta
            if (!tablet_meta_info.__isset.meta_type) {
                tablet->set_partition_id(tablet_meta_info.partition_id);
            } else {
                switch (tablet_meta_info.meta_type) {
                case TTabletMetaType::PARTITIONID:
                    tablet->set_partition_id(tablet_meta_info.partition_id);
                    break;
                case TTabletMetaType::INMEMORY:
                    tablet->tablet_meta()->mutable_tablet_schema()->set_is_in_memory(
                            tablet_meta_info.is_in_memory);
                    break;
                }
            }
            tablet->save_meta();
        }

        LOG(INFO) << "finish update tablet meta task. signature:" << agent_task_req.signature;

        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_task_status(task_status);
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_clone_worker_thread_callback() {
    while (_is_work) {
        Status status = Status::OK();
        TAgentTaskRequest agent_task_req;
        TCloneReq clone_req;

        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            clone_req = agent_task_req.clone_req;
            _tasks.pop_front();
        }

        DorisMetrics::instance()->clone_requests_total->increment(1);
        LOG(INFO) << "get clone task. signature:" << agent_task_req.signature;

        std::vector<string> error_msgs;
        std::vector<TTabletInfo> tablet_infos;
        EngineCloneTask engine_task(clone_req, _master_info, agent_task_req.signature, &error_msgs,
                                    &tablet_infos, &status);
        _env->storage_engine()->execute_task(&engine_task);
        // Return result to fe
        TStatus task_status;
        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);

        TStatusCode::type status_code = TStatusCode::OK;
        if (!status.ok()) {
            DorisMetrics::instance()->clone_requests_failed->increment(1);
            status_code = TStatusCode::RUNTIME_ERROR;
            LOG(WARNING) << "clone failed. signature: " << agent_task_req.signature;
            error_msgs.push_back("clone failed.");
        } else {
            LOG(INFO) << "clone success, set tablet infos."
                      << "signature:" << agent_task_req.signature;
            finish_task_request.__set_finish_tablet_infos(tablet_infos);
        }
        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);
        finish_task_request.__set_task_status(task_status);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_storage_medium_migrate_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TStorageMediumMigrateReq storage_medium_migrate_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            storage_medium_migrate_req = agent_task_req.storage_medium_migrate_req;
            _tasks.pop_front();
        }

        TStatusCode::type status_code = TStatusCode::OK;
        // check request and get info
        TabletSharedPtr tablet;
        DataDir* dest_store = nullptr;
        if (!_check_migrate_request(storage_medium_migrate_req, tablet, &dest_store)) {
            status_code = TStatusCode::RUNTIME_ERROR;
        } else {
            EngineStorageMigrationTask engine_task(tablet, dest_store);
            Status res = _env->storage_engine()->execute_task(&engine_task);
            if (!res.ok()) {
                LOG(WARNING) << "storage media migrate failed. status: " << res
                             << ", signature: " << agent_task_req.signature;
                status_code = TStatusCode::RUNTIME_ERROR;
            } else {
                LOG(INFO) << "storage media migrate success. status:" << res
                          << ", signature:" << agent_task_req.signature;
            }
        }

        TStatus task_status;
        std::vector<string> error_msgs;
        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_task_status(task_status);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

Status TaskWorkerPool::_check_migrate_request(const TStorageMediumMigrateReq& req,
                                              TabletSharedPtr& tablet, DataDir** dest_store) {
    int64_t tablet_id = req.tablet_id;
    tablet = StorageEngine::instance()->tablet_manager()->get_tablet(tablet_id);
    if (tablet == nullptr) {
        LOG(WARNING) << "can't find tablet. tablet_id= " << tablet_id;
        return Status::OLAPInternalError(OLAP_ERR_TABLE_NOT_FOUND);
    }

    if (req.__isset.data_dir) {
        // request specify the data dir
        *dest_store = StorageEngine::instance()->get_store(req.data_dir);
        if (*dest_store == nullptr) {
            LOG(WARNING) << "data dir not found: " << req.data_dir;
            return Status::OLAPInternalError(OLAP_ERR_DIR_NOT_EXIST);
        }
    } else {
        // this is a storage medium
        // get data dir by storage medium

        // judge case when no need to migrate
        uint32_t count = StorageEngine::instance()->available_storage_medium_type_count();
        if (count <= 1) {
            LOG(INFO) << "available storage medium type count is less than 1, "
                      << "no need to migrate. count=" << count;
            return Status::OLAPInternalError(OLAP_REQUEST_FAILED);
        }
        // check current tablet storage medium
        TStorageMedium::type storage_medium = req.storage_medium;
        TStorageMedium::type src_storage_medium = tablet->data_dir()->storage_medium();
        if (src_storage_medium == storage_medium) {
            LOG(INFO) << "tablet is already on specified storage medium. "
                      << "storage_medium=" << storage_medium;
            return Status::OLAPInternalError(OLAP_REQUEST_FAILED);
        }
        // get a random store of specified storage medium
        auto stores = StorageEngine::instance()->get_stores_for_create_tablet(storage_medium);
        if (stores.empty()) {
            LOG(WARNING) << "fail to get root path for create tablet.";
            return Status::OLAPInternalError(OLAP_ERR_INVALID_ROOT_PATH);
        }

        *dest_store = stores[0];
    }
    if (tablet->data_dir()->path() == (*dest_store)->path()) {
        LOG(INFO) << "tablet is already on specified path. "
                  << "path=" << tablet->data_dir()->path();
        return Status::OLAPInternalError(OLAP_REQUEST_FAILED);
    }

    // check disk capacity
    int64_t tablet_size = tablet->tablet_footprint();
    if ((*dest_store)->reach_capacity_limit(tablet_size)) {
        LOG(WARNING) << "reach the capacity limit of path: " << (*dest_store)->path()
                     << ", tablet size: " << tablet_size;
        return Status::OLAPInternalError(OLAP_ERR_DISK_REACH_CAPACITY_LIMIT);
    }

    return Status::OK();
}

void TaskWorkerPool::_check_consistency_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TCheckConsistencyReq check_consistency_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            check_consistency_req = agent_task_req.check_consistency_req;
            _tasks.pop_front();
        }

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        TStatus task_status;

        uint32_t checksum = 0;
        EngineChecksumTask engine_task(check_consistency_req.tablet_id,
                                       check_consistency_req.schema_hash,
                                       check_consistency_req.version, &checksum);
        Status res = _env->storage_engine()->execute_task(&engine_task);
        if (!res.ok()) {
            LOG(WARNING) << "check consistency failed. status: " << res
                         << ", signature: " << agent_task_req.signature;
            status_code = TStatusCode::RUNTIME_ERROR;
        } else {
            LOG(INFO) << "check consistency success. status: " << res
                      << ", signature:" << agent_task_req.signature << ", checksum:" << checksum;
        }

        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_task_status(task_status);
        finish_task_request.__set_tablet_checksum(static_cast<int64_t>(checksum));
        finish_task_request.__set_request_version(check_consistency_req.version);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_report_task_worker_thread_callback() {
    StorageEngine::instance()->register_report_listener(this);
    TReportRequest request;
    request.__set_backend(_backend);

    while (_is_work) {
        _is_doing_work = false;
        // wait at most report_task_interval_seconds, or being notified
        std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
        _worker_thread_condition_variable.wait_for(
                worker_thread_lock, std::chrono::seconds(config::report_task_interval_seconds));
        if (!_is_work) {
            break;
        }

        if (_master_info.network_address.port == 0) {
            // port == 0 means not received heartbeat yet
            // sleep a short time and try again
            LOG(INFO)
                    << "waiting to receive first heartbeat from frontend before doing task report";
            continue;
        }

        _is_doing_work = true;
        // See _random_sleep() comment in _report_disk_state_worker_thread_callback
        _random_sleep(5);
        {
            lock_guard<std::mutex> task_signatures_lock(_s_task_signatures_lock);
            request.__set_tasks(_s_task_signatures);
        }
        _handle_report(request, ReportType::TASK);
    }
    StorageEngine::instance()->deregister_report_listener(this);
}

/// disk state report thread will report disk state at a configurable fix interval.
void TaskWorkerPool::_report_disk_state_worker_thread_callback() {
    StorageEngine::instance()->register_report_listener(this);

    TReportRequest request;
    request.__set_backend(_backend);

    while (_is_work) {
        _is_doing_work = false;
        // wait at most report_disk_state_interval_seconds, or being notified
        std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
        _worker_thread_condition_variable.wait_for(
                worker_thread_lock,
                std::chrono::seconds(config::report_disk_state_interval_seconds));
        if (!_is_work) {
            break;
        }

        if (_master_info.network_address.port == 0) {
            // port == 0 means not received heartbeat yet
            LOG(INFO)
                    << "waiting to receive first heartbeat from frontend before doing disk report";
            continue;
        }

        _is_doing_work = true;
        // Random sleep 1~5 seconds before doing report.
        // In order to avoid the problem that the FE receives many report requests at the same time
        // and can not be processed.
        _random_sleep(5);

        std::vector<DataDirInfo> data_dir_infos;
        _env->storage_engine()->get_all_data_dir_info(&data_dir_infos, true /* update */);

        map<string, TDisk> disks;
        for (auto& root_path_info : data_dir_infos) {
            TDisk disk;
            disk.__set_root_path(root_path_info.path_desc.filepath);
            disk.__set_path_hash(root_path_info.path_hash);
            disk.__set_storage_medium(root_path_info.storage_medium);
            disk.__set_disk_total_capacity(root_path_info.disk_capacity);
            disk.__set_data_used_capacity(root_path_info.data_used_capacity);
            disk.__set_disk_available_capacity(root_path_info.available);
            disk.__set_used(root_path_info.is_used);
            disks[root_path_info.path_desc.filepath] = disk;
        }
        request.__set_disks(disks);
        _handle_report(request, ReportType::DISK);
    }
    StorageEngine::instance()->deregister_report_listener(this);
}

void TaskWorkerPool::_report_tablet_worker_thread_callback() {
    StorageEngine::instance()->register_report_listener(this);

    TReportRequest request;
    request.__set_backend(_backend);
    request.__isset.tablets = true;
    while (_is_work) {
        _is_doing_work = false;

        // wait at most report_tablet_interval_seconds, or being notified
        std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
        _worker_thread_condition_variable.wait_for(
                worker_thread_lock, std::chrono::seconds(config::report_tablet_interval_seconds));
        if (!_is_work) {
            break;
        }

        if (_master_info.network_address.port == 0) {
            // port == 0 means not received heartbeat yet
            LOG(INFO) << "waiting to receive first heartbeat from frontend before doing tablet "
                         "report";
            continue;
        }

        _is_doing_work = true;
        // See _random_sleep() comment in _report_disk_state_worker_thread_callback
        _random_sleep(5);
        request.tablets.clear();
        uint64_t report_version = _s_report_version;
        Status build_all_report_tablets_info_status =
                StorageEngine::instance()->tablet_manager()->build_all_report_tablets_info(
                        &request.tablets);
        if (report_version < _s_report_version) {
            // TODO llj This can only reduce the possibility for report error, but can't avoid it.
            // If FE create a tablet in FE meta and send CREATE task to this BE, the tablet may not be included in this
            // report, and the report version has a small probability that it has not been updated in time. When FE
            // receives this report, it is possible to delete the new tablet.
            LOG(WARNING) << "report version " << report_version << " change to "
                         << _s_report_version;
            DorisMetrics::instance()->report_all_tablets_requests_skip->increment(1);
            continue;
        }
        if (!build_all_report_tablets_info_status.ok()) {
            LOG(WARNING) << "build all report tablets info failed. status: "
                         << build_all_report_tablets_info_status;
            continue;
        }
        int64_t max_compaction_score =
                std::max(DorisMetrics::instance()->tablet_cumulative_max_compaction_score->value(),
                         DorisMetrics::instance()->tablet_base_max_compaction_score->value());
        request.__set_tablet_max_compaction_score(max_compaction_score);
        request.__set_report_version(report_version);
        _handle_report(request, ReportType::TABLET);
    }
    StorageEngine::instance()->deregister_report_listener(this);
}

void TaskWorkerPool::_upload_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TUploadReq upload_request;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            upload_request = agent_task_req.upload_req;
            _tasks.pop_front();
        }

        LOG(INFO) << "get upload task, signature:" << agent_task_req.signature
                  << ", job id:" << upload_request.job_id;

        std::map<int64_t, std::vector<std::string>> tablet_files;
        std::unique_ptr<SnapshotLoader> loader = nullptr;
        if (upload_request.__isset.storage_backend) {
            loader.reset(new SnapshotLoader(_env, upload_request.job_id, agent_task_req.signature,
                                            upload_request.broker_prop,
                                            upload_request.storage_backend));
        } else {
            loader.reset(new SnapshotLoader(_env, upload_request.job_id, agent_task_req.signature,
                                            upload_request.broker_addr,
                                            upload_request.broker_prop));
        }
        Status status = loader->upload(upload_request.src_dest_map, &tablet_files);

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        if (!status.ok()) {
            status_code = TStatusCode::RUNTIME_ERROR;
            LOG(WARNING) << "upload failed. job id: " << upload_request.job_id
                         << ", msg: " << status.get_error_msg();
            error_msgs.push_back(status.get_error_msg());
        }

        TStatus task_status;
        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_task_status(task_status);
        finish_task_request.__set_tablet_files(tablet_files);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);

        LOG(INFO) << "finished upload task, signature: " << agent_task_req.signature
                  << ", job id:" << upload_request.job_id;
    }
}

void TaskWorkerPool::_download_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TDownloadReq download_request;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            download_request = agent_task_req.download_req;
            _tasks.pop_front();
        }
        LOG(INFO) << "get download task, signature: " << agent_task_req.signature
                  << ", job id:" << download_request.job_id;

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        TStatus task_status;

        // TODO: download
        std::vector<int64_t> downloaded_tablet_ids;

        std::unique_ptr<SnapshotLoader> loader = nullptr;
        if (download_request.__isset.storage_backend) {
            loader.reset(new SnapshotLoader(_env, download_request.job_id, agent_task_req.signature,
                                            download_request.broker_prop,
                                            download_request.storage_backend));
        } else {
            loader.reset(new SnapshotLoader(_env, download_request.job_id, agent_task_req.signature,
                                            download_request.broker_addr,
                                            download_request.broker_prop));
        }
        Status status = loader->download(download_request.src_dest_map, &downloaded_tablet_ids);

        if (!status.ok()) {
            status_code = TStatusCode::RUNTIME_ERROR;
            LOG(WARNING) << "download failed. job id: " << download_request.job_id
                         << ", msg: " << status.get_error_msg();
            error_msgs.push_back(status.get_error_msg());
        }

        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_task_status(task_status);
        finish_task_request.__set_downloaded_tablet_ids(downloaded_tablet_ids);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);

        LOG(INFO) << "finished download task, signature: " << agent_task_req.signature
                  << ", job id:" << download_request.job_id;
    }
}

void TaskWorkerPool::_make_snapshot_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TSnapshotRequest snapshot_request;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            snapshot_request = agent_task_req.snapshot_req;
            _tasks.pop_front();
        }
        LOG(INFO) << "get snapshot task, signature:" << agent_task_req.signature;

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        TStatus task_status;

        string snapshot_path;
        bool allow_incremental_clone = false; // not used
        std::vector<string> snapshot_files;
        Status make_snapshot_status = SnapshotManager::instance()->make_snapshot(
                snapshot_request, &snapshot_path, &allow_incremental_clone);
        if (!make_snapshot_status.ok()) {
            status_code = make_snapshot_status.code();
            LOG(WARNING) << "make_snapshot failed. tablet_id:" << snapshot_request.tablet_id
                         << ", schema_hash:" << snapshot_request.schema_hash
                         << ", version:" << snapshot_request.version
                         << ", status: " << make_snapshot_status.to_string();
            error_msgs.push_back("make_snapshot failed. status: " +
                                 make_snapshot_status.get_error_msg());
        } else {
            LOG(INFO) << "make_snapshot success. tablet_id:" << snapshot_request.tablet_id
                      << ", schema_hash:" << snapshot_request.schema_hash
                      << ", version:" << snapshot_request.version
                      << ", snapshot_path:" << snapshot_path;
            if (snapshot_request.__isset.list_files) {
                // list and save all snapshot files
                // snapshot_path like: data/snapshot/20180417205230.1.86400
                // we need to add subdir: tablet_id/schema_hash/
                std::stringstream ss;
                ss << snapshot_path << "/" << snapshot_request.tablet_id << "/"
                   << snapshot_request.schema_hash << "/";
                Status st = FileUtils::list_files(Env::Default(), ss.str(), &snapshot_files);
                if (!st.ok()) {
                    status_code = TStatusCode::RUNTIME_ERROR;
                    LOG(WARNING) << "make_snapshot failed. tablet_id:" << snapshot_request.tablet_id
                                 << ", schema_hash:" << snapshot_request.schema_hash
                                 << ", version:" << snapshot_request.version
                                 << ",list file failed: " << st.to_string();
                    error_msgs.push_back("make_snapshot failed. list file failed: " +
                                         st.get_error_msg());
                }
            }
        }

        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_snapshot_path(snapshot_path);
        finish_task_request.__set_snapshot_files(snapshot_files);
        finish_task_request.__set_task_status(task_status);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_release_snapshot_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TReleaseSnapshotRequest release_snapshot_request;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            release_snapshot_request = agent_task_req.release_snapshot_req;
            _tasks.pop_front();
        }
        LOG(INFO) << "get release snapshot task, signature:" << agent_task_req.signature;

        TStatusCode::type status_code = TStatusCode::OK;
        std::vector<string> error_msgs;
        TStatus task_status;

        string& snapshot_path = release_snapshot_request.snapshot_path;
        Status release_snapshot_status =
                SnapshotManager::instance()->release_snapshot(snapshot_path);
        if (!release_snapshot_status.ok()) {
            status_code = TStatusCode::RUNTIME_ERROR;
            LOG(WARNING) << "release_snapshot failed. snapshot_path: " << snapshot_path
                         << ". status: " << release_snapshot_status;
            error_msgs.push_back("release_snapshot failed. status: " +
                                 boost::lexical_cast<string>(release_snapshot_status));
        } else {
            LOG(INFO) << "release_snapshot success. snapshot_path: " << snapshot_path
                      << ". status: " << release_snapshot_status;
        }

        task_status.__set_status_code(status_code);
        task_status.__set_error_msgs(error_msgs);

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_task_status(task_status);

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

Status TaskWorkerPool::_get_tablet_info(const TTabletId tablet_id, const TSchemaHash schema_hash,
                                        int64_t signature, TTabletInfo* tablet_info) {
    Status status = Status::OK();
    tablet_info->__set_tablet_id(tablet_id);
    tablet_info->__set_schema_hash(schema_hash);
    Status olap_status =
            StorageEngine::instance()->tablet_manager()->report_tablet_info(tablet_info);
    if (!olap_status.ok()) {
        LOG(WARNING) << "get tablet info failed. status: " << olap_status
                     << ", signature: " << signature;
        status = Status::InternalError("Get tablet info failed");
    }
    return status;
}

void TaskWorkerPool::_move_dir_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TMoveDirReq move_dir_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            move_dir_req = agent_task_req.move_dir_req;
            _tasks.pop_front();
        }
        LOG(INFO) << "get move dir task, signature:" << agent_task_req.signature
                  << ", job id:" << move_dir_req.job_id;
        Status status = _move_dir(move_dir_req.tablet_id, move_dir_req.src, move_dir_req.job_id,
                                  true /* TODO */);

        if (!status.ok()) {
            LOG(WARNING) << "failed to move dir: " << move_dir_req.src
                         << ", tablet id: " << move_dir_req.tablet_id
                         << ", signature: " << agent_task_req.signature
                         << ", job id: " << move_dir_req.job_id;
        } else {
            LOG(INFO) << "finished to move dir:" << move_dir_req.src
                      << ", tablet_id:" << move_dir_req.tablet_id
                      << ", signature:" << agent_task_req.signature
                      << ", job id:" << move_dir_req.job_id;
        }

        TFinishTaskRequest finish_task_request;
        finish_task_request.__set_backend(_backend);
        finish_task_request.__set_task_type(agent_task_req.task_type);
        finish_task_request.__set_signature(agent_task_req.signature);
        finish_task_request.__set_task_status(status.to_thrift());

        _finish_task(finish_task_request);
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

Status TaskWorkerPool::_move_dir(const TTabletId tablet_id, const std::string& src, int64_t job_id,
                                 bool overwrite) {
    TabletSharedPtr tablet = StorageEngine::instance()->tablet_manager()->get_tablet(tablet_id);
    if (tablet == nullptr) {
        LOG(INFO) << "failed to get tablet. tablet_id:" << tablet_id;
        return Status::InvalidArgument("Could not find tablet");
    }

    std::string dest_tablet_dir = tablet->tablet_path_desc().filepath;
    SnapshotLoader loader(_env, job_id, tablet_id);
    Status status = loader.move(src, tablet, overwrite);

    if (!status.ok()) {
        LOG(WARNING) << "move failed. job id: " << job_id << ", msg: " << status.get_error_msg();
        return status;
    }

    return Status::OK();
}

void TaskWorkerPool::_handle_report(TReportRequest& request, ReportType type) {
    TMasterResult result;
    Status status = _master_client->report(request, &result);
    bool is_report_success = false;
    if (!status.ok()) {
        LOG(WARNING) << "report " << TYPE_STRING(type) << " failed. status: " << status
                     << ", master host: " << _master_info.network_address.hostname
                     << ", port:" << _master_info.network_address.port;
    } else if (result.status.status_code != TStatusCode::OK) {
        std::stringstream ss;
        if (!result.status.error_msgs.empty()) {
            ss << result.status.error_msgs[0];
            for (int i = 1; i < result.status.error_msgs.size(); i++) {
                ss << "," << result.status.error_msgs[i];
            }
        }
        LOG(WARNING) << "finish report " << TYPE_STRING(type)
                     << " failed. status:" << result.status.status_code
                     << ", error msg:" << ss.str();
    } else {
        is_report_success = true;
        LOG(INFO) << "finish report " << TYPE_STRING(type)
                  << ". master host: " << _master_info.network_address.hostname
                  << ", port: " << _master_info.network_address.port;
    }
    switch (type) {
    case TASK:
        DorisMetrics::instance()->report_task_requests_total->increment(1);
        if (!is_report_success) {
            DorisMetrics::instance()->report_task_requests_failed->increment(1);
        }
        break;
    case DISK:
        DorisMetrics::instance()->report_disk_requests_total->increment(1);
        if (!is_report_success) {
            DorisMetrics::instance()->report_disk_requests_failed->increment(1);
        }
        break;
    case TABLET:
        DorisMetrics::instance()->report_tablet_requests_total->increment(1);
        if (!is_report_success) {
            DorisMetrics::instance()->report_tablet_requests_failed->increment(1);
        }
        break;
    default:
        break;
    }
}

void TaskWorkerPool::_random_sleep(int second) {
    Random rnd(UnixMillis());
    sleep(rnd.Uniform(second) + 1);
}

void TaskWorkerPool::_submit_table_compaction_worker_thread_callback() {
    SCOPED_ATTACH_TASK_THREAD(ThreadContext::TaskType::COMPACTION,
                              StorageEngine::instance()->compaction_mem_tracker());
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        TCompactionReq compaction_req;

        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            compaction_req = agent_task_req.compaction_req;
            _tasks.pop_front();
        }

        LOG(INFO) << "get compaction task. signature:" << agent_task_req.signature
                  << ", compaction type:" << compaction_req.type;

        CompactionType compaction_type;
        if (compaction_req.type == "base") {
            compaction_type = CompactionType::BASE_COMPACTION;
        } else {
            compaction_type = CompactionType::CUMULATIVE_COMPACTION;
        }

        TabletSharedPtr tablet_ptr =
                StorageEngine::instance()->tablet_manager()->get_tablet(compaction_req.tablet_id);
        if (tablet_ptr != nullptr) {
            auto data_dir = tablet_ptr->data_dir();
            if (!tablet_ptr->can_do_compaction(data_dir->path_hash(), compaction_type)) {
                LOG(WARNING) << "can not do compaction: " << tablet_ptr->tablet_id()
                             << ", compaction type: " << compaction_type;
                _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
                continue;
            }

            Status status =
                    StorageEngine::instance()->submit_compaction_task(tablet_ptr, compaction_type);
            if (!status.ok()) {
                LOG(WARNING) << "failed to submit table compaction task. " << status.to_string();
            }
            _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
        }
    }
}

void TaskWorkerPool::_storage_medium_migrate_v2_worker_thread_callback() {
    while (_is_work) {
        TAgentTaskRequest agent_task_req;
        {
            std::unique_lock<std::mutex> worker_thread_lock(_worker_thread_lock);
            while (_is_work && _tasks.empty()) {
                _worker_thread_condition_variable.wait(worker_thread_lock);
            }
            if (!_is_work) {
                return;
            }

            agent_task_req = _tasks.front();
            _tasks.pop_front();
        }
        int64_t signature = agent_task_req.signature;
        LOG(INFO) << "get migration table v2 task, signature: " << agent_task_req.signature;
        bool is_task_timeout = false;
        if (agent_task_req.__isset.recv_time) {
            int64_t time_elapsed = time(nullptr) - agent_task_req.recv_time;
            if (time_elapsed > config::report_task_interval_seconds * 20) {
                LOG(INFO) << "task elapsed " << time_elapsed
                          << " seconds since it is inserted to queue, it is timeout";
                is_task_timeout = true;
            }
        }
        if (!is_task_timeout) {
            TFinishTaskRequest finish_task_request;
            TTaskType::type task_type = agent_task_req.task_type;
            switch (task_type) {
            case TTaskType::STORAGE_MEDIUM_MIGRATE_V2:
                _storage_medium_migrate_v2(agent_task_req, signature, task_type,
                                           &finish_task_request);
                break;
            default:
                // pass
                break;
            }
            _finish_task(finish_task_request);
        }
        _remove_task_info(agent_task_req.task_type, agent_task_req.signature);
    }
}

void TaskWorkerPool::_storage_medium_migrate_v2(const TAgentTaskRequest& agent_task_req,
                                                int64_t signature, const TTaskType::type task_type,
                                                TFinishTaskRequest* finish_task_request) {
    Status status = Status::OK();
    TStatus task_status;
    std::vector<string> error_msgs;

    string process_name;
    switch (task_type) {
    case TTaskType::STORAGE_MEDIUM_MIGRATE_V2:
        process_name = "StorageMediumMigrationV2";
        break;
    default:
        std::string task_name;
        EnumToString(TTaskType, task_type, task_name);
        LOG(WARNING) << "Storage medium migration v2 type invalid. type: " << task_name
                     << ", signature: " << signature;
        status = Status::NotSupported("Storage medium migration v2 type invalid");
        break;
    }

    // Check last storage medium migration v2 status, if failed delete tablet file
    // Do not need to adjust delete success or not
    // Because if delete failed task will failed
    TTabletId new_tablet_id;
    TSchemaHash new_schema_hash = 0;
    if (status.ok()) {
        new_tablet_id = agent_task_req.storage_migration_req_v2.new_tablet_id;
        new_schema_hash = agent_task_req.storage_migration_req_v2.new_schema_hash;
        EngineStorageMigrationTaskV2 engine_task(agent_task_req.storage_migration_req_v2);
        Status sc_status = _env->storage_engine()->execute_task(&engine_task);
        if (!sc_status.ok()) {
            if (sc_status.precise_code() == OLAP_ERR_DATA_QUALITY_ERR) {
                error_msgs.push_back("The data quality does not satisfy, please check your data. ");
            }
            status = sc_status;
        } else {
            status = Status::OK();
        }
    }

    if (status.ok()) {
        ++_s_report_version;
        LOG(INFO) << process_name << " finished. signature: " << signature;
    }

    // Return result to fe
    finish_task_request->__set_backend(_backend);
    finish_task_request->__set_report_version(_s_report_version);
    finish_task_request->__set_task_type(task_type);
    finish_task_request->__set_signature(signature);

    std::vector<TTabletInfo> finish_tablet_infos;
    if (status.ok()) {
        TTabletInfo tablet_info;
        status = _get_tablet_info(new_tablet_id, new_schema_hash, signature, &tablet_info);

        if (!status.ok()) {
            LOG(WARNING) << process_name << " success, but get new tablet info failed."
                         << "tablet_id: " << new_tablet_id << ", schema_hash: " << new_schema_hash
                         << ", signature: " << signature;
        } else {
            finish_tablet_infos.push_back(tablet_info);
        }
    }

    if (status.ok()) {
        finish_task_request->__set_finish_tablet_infos(finish_tablet_infos);
        LOG(INFO) << process_name << " success. signature: " << signature;
        error_msgs.push_back(process_name + " success");
    } else {
        LOG(WARNING) << process_name << " failed. signature: " << signature;
        error_msgs.push_back(process_name + " failed");
        error_msgs.push_back("status: " + status.to_string());
    }
    task_status.__set_status_code(status.code());
    task_status.__set_error_msgs(error_msgs);
    finish_task_request->__set_task_status(task_status);
}

} // namespace doris