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2021-05-31 22:56:52 +08:00
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src/rootserver/ob_empty_server_checker.cpp Normal file
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#define USING_LOG_PREFIX RS
#include "ob_empty_server_checker.h"
#include "lib/container/ob_array.h"
#include "lib/container/ob_array_iterator.h"
#include "share/ob_srv_rpc_proxy.h"
#include "share/ob_multi_cluster_util.h"
#include "share/partition_table/ob_partition_info.h"
#include "share/partition_table/ob_partition_table_iterator.h"
#include "share/partition_table/ob_partition_table_operator.h"
#include "share/schema/ob_multi_version_schema_service.h"
#include "share/config/ob_server_config.h"
#include "observer/ob_server_struct.h"
#include "ob_server_manager.h"
namespace oceanbase {
namespace rootserver {
using namespace common;
using namespace obrpc;
using namespace share;
ObEmptyServerCheckRound::ObEmptyServerCheckRound(volatile bool& stop)
: inited_(false),
stop_(stop),
version_(0),
rpc_proxy_(NULL),
server_mgr_(NULL),
pt_operator_(NULL),
schema_service_(NULL)
{}
ObEmptyServerCheckRound::~ObEmptyServerCheckRound()
{}
int ObEmptyServerCheckRound::init(ObServerManager& server_mgr, ObSrvRpcProxy& rpc_proxy,
ObPartitionTableOperator& pt_operator, schema::ObMultiVersionSchemaService& schema_service)
{
int ret = OB_SUCCESS;
const int64_t server_bucket_num = 1000;
if (inited_) {
ret = OB_INIT_TWICE;
LOG_WARN("init twice", K(ret));
} else if (OB_FAIL(alive_servers_.create(hash::cal_next_prime(server_bucket_num), ObModIds::OB_RS_SERVER_MANAGER))) {
LOG_WARN("create alive server hash map failed", K(ret), K(server_bucket_num));
} else if (OB_FAIL(empty_servers_.create(hash::cal_next_prime(server_bucket_num), ObModIds::OB_RS_SERVER_MANAGER))) {
LOG_WARN("create empty server hash map failed", K(ret), K(server_bucket_num));
} else {
server_mgr_ = &server_mgr;
rpc_proxy_ = &rpc_proxy;
pt_operator_ = &pt_operator;
schema_service_ = &schema_service;
inited_ = true;
}
return ret;
}
int ObEmptyServerCheckRound::check(ObThreadCond& cond)
{
int ret = OB_SUCCESS;
ObArray<ObServerStatus> all_servers;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
alive_servers_.clear();
empty_servers_.clear();
version_ = std::max(std::abs(version_) + 1, ObTimeUtility::current_time());
LOG_INFO("start check empty server", K_(version));
}
// <1> get snapshot of all server status.
if (OB_FAIL(ret)) {
} else if (OB_FAIL(server_mgr_->get_server_statuses("", all_servers))) {
LOG_WARN("get all sever status failed", K(ret));
} else {
const int64_t now = ObTimeUtility::current_time();
FOREACH_X(s, all_servers, OB_SUCC(ret))
{
if (s->need_check_empty(now)) {
if (OB_FAIL(empty_servers_.set_refactored(s->server_, s->last_hb_time_))) {
LOG_WARN("add server to empty servers failed", K(ret));
}
} else if (s->is_alive()) {
const int64_t finish_times = 0;
if (OB_FAIL(alive_servers_.set_refactored(s->server_, finish_times))) {
LOG_WARN("add server to alive server failed", K(ret));
}
}
}
if (OB_SUCC(ret)) {
if (0 == empty_servers_.size()) {
LOG_INFO("no server with partition and lease expired OB_MAX_ADD_MEMBER_TIMEOUT ago, "
"no need check empty",
LITERAL_K(OB_MAX_ADD_MEMBER_TIMEOUT));
}
}
if (OB_SUCC(ret) && empty_servers_.size() > 0) {
// <2> send %sync_partition_table rpc to alive servers.
// release %cond to make pt_sync_finish can be called before all rpc send.
cond.unlock();
FOREACH_X(s, all_servers, !stop_ && OB_SUCC(ret))
{
if (s->is_alive()) {
if (OB_FAIL(rpc_proxy_->to(s->server_).timeout(GCONF.rpc_timeout).sync_partition_table(version_))) {
LOG_WARN("request server sync partition table failed", K(ret), "server", s->server_, K_(version));
}
}
}
if (OB_SUCC(ret) && stop_) {
ret = OB_CANCELED;
}
cond.lock();
// <3> wait all alive servers sync partition table finish
if (OB_SUCC(ret)) {
if (OB_FAIL(wait_pt_sync_finish(cond))) {
LOG_WARN("wait partition table sync finish failed", K(ret));
}
}
if (OB_SUCC(ret)) {
// reset version to avoid concurrent access of %alive_servers_
version_ = -version_;
cond.unlock();
// <4> check whether has member on empty servers, and set with partition flag
if (OB_FAIL(update_with_partition_flag())) {
LOG_WARN("update with partition flag failed", K(ret));
}
cond.lock();
}
}
}
if (version_ > 0) {
version_ = -version_;
}
return ret;
}
int ObEmptyServerCheckRound::pt_sync_finish(const common::ObAddr& server, const int64_t version)
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else if (!server.is_valid() || version <= 0) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("invalid argument", K(ret), K(server), K(server));
} else if (version != version_) {
LOG_INFO("version mismatch, ignore partition table sync finish request",
K(server),
K(version),
"checker_version",
version_);
} else {
int64_t finish_times = 0;
if (OB_FAIL(alive_servers_.get_refactored(server, finish_times))) {
LOG_WARN("get server from hash map failed", K(ret), K(server));
} else {
finish_times += 1;
const int overwrite = 1;
if (OB_FAIL(alive_servers_.set_refactored(server, finish_times, overwrite))) {
LOG_WARN("over write server pt sync finish times failed", K(ret), K(server));
}
}
}
return ret;
}
int ObEmptyServerCheckRound::wait_pt_sync_finish(ObThreadCond& cond)
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
const int64_t begin_time_us = ObTimeUtility::current_time();
while (OB_SUCC(ret)) {
bool all_finish = true;
if (stop_) {
ret = OB_CANCELED;
} else {
FOREACH_X(s, alive_servers_, OB_SUCC(ret))
{
if (s->second < ObIPartitionTable::PARTITION_TABLE_REPORT_LEVELS) {
all_finish = false;
LOG_DEBUG("partition table not sync finish", "server", s->first);
// if server offline, we end this check round
bool alive = false;
if (OB_FAIL(server_mgr_->check_server_alive(s->first, alive))) {
LOG_WARN("check server alive failed", K(ret), "server", s->first);
} else if (!alive) {
ret = OB_SERVER_NOT_ALIVE;
LOG_WARN("server lease expired, end this round", K(ret), "server", s->first);
}
}
}
}
if (OB_SUCC(ret)) {
if (all_finish) {
break;
}
int64_t wait_time_ms = (begin_time_us + PT_SYNC_TIMEOUT - ObTimeUtility::current_time()) / 1000L;
if (wait_time_ms <= 0) {
ret = OB_TIMEOUT;
LOG_WARN("wait partition table sync finish failed", K(ret), K(begin_time_us), LITERAL_K(PT_SYNC_TIMEOUT));
FOREACH(s, alive_servers_)
{
if (s->second < ObIPartitionTable::PARTITION_TABLE_REPORT_LEVELS) {
LOG_WARN("partition table still not sync finish",
K(ret),
"server",
s->first,
"finish_cnt",
s->second,
"need_count",
static_cast<int64_t>(ObIPartitionTable::PARTITION_TABLE_REPORT_LEVELS));
}
}
} else {
// check server alive per second.
const int64_t max_wait_time_ms = 1000; // 1 second
wait_time_ms = std::min(wait_time_ms, max_wait_time_ms);
if (OB_SUCCESS != cond.wait(static_cast<int32_t>(wait_time_ms))) {
LOG_DEBUG("wait timeout", K(wait_time_ms));
}
}
}
}
}
return ret;
}
int ObEmptyServerCheckRound::update_with_partition_flag()
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else if (stop_) {
ret = OB_CANCELED;
} else {
ObPartitionTableIterator iter;
bool ignore_row_checksum = true;
if (OB_FAIL(iter.init(*pt_operator_, *schema_service_, ignore_row_checksum))) {
LOG_WARN("partition table iterator init failed", K(ret));
} else {
ObPartitionInfo partition;
partition.reuse();
while (!stop_ && OB_SUCC(ret) && empty_servers_.size() > 0) {
if (OB_FAIL(iter.next(partition))) {
if (OB_ITER_END == ret) {
ret = OB_SUCCESS;
} else {
LOG_WARN("iterate partition table failed", K(ret));
}
break;
}
ObIArray<ObPartitionReplica>& replica_array = partition.get_replicas_v2();
const ObPartitionReplica* replica = NULL;
// filter leader member_list
if (OB_FAIL(partition.find_leader_by_election(replica))) {
if (OB_ENTRY_NOT_EXIST == ret) {
ret = OB_LEADER_NOT_EXIST;
}
LOG_WARN("find leader failed", K(ret), K(partition));
} else if (OB_ISNULL(replica)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("NULL replica pointer", K(ret));
} else {
// check whether leader on alive servers
int64_t finish_times = 0;
if (OB_FAIL(alive_servers_.get_refactored(replica->server_, finish_times))) {
LOG_WARN("partition leader not on partition table synced servers", K(ret), "replica", *replica);
}
// check whether has member on empty servers
FOREACH_CNT_X(m, replica->member_list_, OB_SUCC(ret))
{
int64_t last_hb_time = 0;
if (OB_FAIL(empty_servers_.get_refactored(m->server_, last_hb_time))) {
if (OB_HASH_NOT_EXIST != ret) {
LOG_WARN("get from hash map failed", K(ret), "server", m->server_);
} else {
ret = OB_SUCCESS;
}
} else {
LOG_INFO("partition has member on sever", K(partition), "server", m->server_);
if (OB_FAIL(empty_servers_.erase_refactored(m->server_))) {
LOG_WARN("erase item from hash map failed", K(ret), "server", m->server_);
}
}
} // end FORECAH member_list
}
// filter server of replicas
if (OB_SUCC(ret)) {
for (int64_t i = 0; i < replica_array.count() && OB_SUCC(ret); ++i) {
int64_t last_hb_time = 0;
if (OB_FAIL(empty_servers_.get_refactored(replica_array.at(i).server_, last_hb_time))) {
if (OB_HASH_NOT_EXIST != ret) {
LOG_WARN("get from hash map failed", K(ret), "server", replica_array.at(i).server_);
} else {
ret = OB_SUCCESS;
}
} else {
LOG_INFO("this sever has partition", K(partition), "server", replica_array.at(i).server_);
if (OB_FAIL(empty_servers_.erase_refactored(replica_array.at(i).server_))) {
LOG_WARN("erase item from hash map failed", K(ret), "server", replica_array.at(i).server_);
}
}
} // end for
}
} // end while
}
}
if (OB_SUCC(ret)) {
FOREACH_X(it, empty_servers_, !stop_ && OB_SUCC(ret))
{
LOG_INFO("try to clear server with partition flag", "server", it->first, "last_hb_time", it->second);
if (OB_FAIL(server_mgr_->clear_with_partiton(it->first, it->second))) {
LOG_WARN("clear server with partition flag failed", K(ret), "server", it->first, "last_hb_time", it->second);
}
}
}
if (OB_SUCC(ret) && stop_) {
ret = OB_CANCELED;
}
return ret;
}
ObEmptyServerChecker::ObEmptyServerChecker() : inited_(false), need_check_(false), check_round_(stop_), cond_()
{}
ObEmptyServerChecker::~ObEmptyServerChecker()
{}
int ObEmptyServerChecker::init(ObServerManager& server_mgr, ObSrvRpcProxy& rpc_proxy,
ObPartitionTableOperator& pt_operator, schema::ObMultiVersionSchemaService& schema_service)
{
int ret = OB_SUCCESS;
const int64_t empty_server_checker_thread_cnt = 1;
if (inited_) {
ret = OB_INIT_TWICE;
LOG_WARN("init twice", K(ret));
} else if (OB_FAIL(cond_.init(ObWaitEventIds::EMPTY_SERVER_CHECK_COND_WAIT))) {
LOG_WARN("fail to init thread cond, ", K(ret));
} else if (OB_FAIL(check_round_.init(server_mgr, rpc_proxy, pt_operator, schema_service))) {
LOG_WARN("check round init failed", K(ret));
} else if (OB_FAIL(create(empty_server_checker_thread_cnt, "EmptSvrCheck"))) {
LOG_WARN("create empty server checker thread failed", K(ret), K(empty_server_checker_thread_cnt));
} else {
inited_ = true;
}
return ret;
}
void ObEmptyServerChecker::run3()
{
LOG_INFO("empty server checker start");
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
while (!stop_) {
ret = OB_SUCCESS;
ObThreadCondGuard guard(cond_);
if (need_check_) {
need_check_ = false;
if (OB_FAIL(check_round_.check(cond_))) {
LOG_WARN("empty server check round failed", K(ret));
}
}
if (OB_SUCC(ret) && !stop_ && !need_check_) {
const int wait_time_ms = 1000;
if (OB_SUCCESS != cond_.wait(wait_time_ms)) {
LOG_DEBUG("wait timeout", K(wait_time_ms));
}
}
}
}
LOG_INFO("empty server checker stop");
}
void ObEmptyServerChecker::wakeup()
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
cond_.broadcast();
}
}
void ObEmptyServerChecker::stop()
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
ObRsReentrantThread::stop();
ObThreadCondGuard guard(cond_);
cond_.broadcast();
}
}
int ObEmptyServerChecker::notify_check()
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else {
ObThreadCondGuard guard(cond_);
need_check_ = true;
cond_.broadcast();
}
return ret;
}
int ObEmptyServerChecker::pt_sync_finish(const common::ObAddr& server, const int64_t version)
{
int ret = OB_SUCCESS;
if (!inited_) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret));
} else if (!server.is_valid() && version <= 0) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("invalid argument", K(ret), K(server), K(version));
} else {
ObThreadCondGuard guard(cond_);
if (OB_FAIL(check_round_.pt_sync_finish(server, version))) {
LOG_WARN("partition table sync finish failed", K(ret), K(server), K(version));
} else {
cond_.broadcast();
}
}
return ret;
}
} // end namespace rootserver
} // end namespace oceanbase