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[tablelock] Fix the bug about checkpoint rollback due to disorder commit during replay

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This commit is contained in:
obdev
2023-04-06 07:59:34 +00:00
committed by ob-robot
parent b5179fc7aa
commit d5faf6c8c8
3 changed files with 258 additions and 7 deletions
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1
mittest/mtlenv/storage/checkpoint/CMakeLists.txt
View File

@ -1,2 +1,3 @@
storage_unittest(test_checkpoint_executor)
storage_unittest(test_data_checkpoint)
storage_unittest(test_lock_memtable_checkpoint)

226
mittest/mtlenv/storage/checkpoint/test_lock_memtable_checkpoint.cpp Normal file
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@ -0,0 +1,226 @@
/**
* 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 TABLELOCK
#include <gtest/gtest.h>
#define protected public
#define private public
#include "storage/ls/ob_ls.h"
#include "mtlenv/mock_tenant_module_env.h"
#include "mtlenv/tablelock/table_lock_common_env.h"
#include "mtlenv/tablelock/table_lock_tx_common_env.h"
#include "storage/tx_storage/ob_ls_service.h"
#include "storage/init_basic_struct.h"
#include "storage/tablelock/ob_lock_memtable.h"
#include "observer/ob_safe_destroy_thread.h"
namespace oceanbase
{
namespace storage
{
using namespace checkpoint;
}
namespace transaction
{
namespace tablelock
{
class TestLockMemtableCheckpoint : public ::testing::Test
{
public:
TestLockMemtableCheckpoint()
: fake_t3m_(common::OB_SERVER_TENANT_ID),
ls_id_(ObLSID(100)),
ls_handle_()
{
LOG_INFO("construct TestLockMemtableCheckpoint");
}
~TestLockMemtableCheckpoint() = default;
static void SetUpTestCase();
static void TearDownTestCase();
void SetUp() override
{
ObCreateLSArg arg;
ObLSService *ls_svr = MTL(ObLSService*);
ASSERT_NE(nullptr, ls_svr);
ASSERT_EQ(OB_SUCCESS,
storage::gen_create_ls_arg(OB_SYS_TENANT_ID, ls_id_, arg));
ASSERT_EQ(OB_SUCCESS, MTL(ObLSService *)->create_ls(arg));
ASSERT_EQ(OB_SUCCESS,
ls_svr->get_ls(ls_id_, ls_handle_, ObLSGetMod::TABLELOCK_MOD));
ASSERT_NE(nullptr, ls_ = ls_handle_.get_ls());
ASSERT_EQ(OB_SUCCESS, ls_->get_lock_table()->get_lock_memtable(table_handle_));
ASSERT_EQ(OB_SUCCESS, table_handle_.get_lock_memtable(memtable_));
LOG_INFO("set up success");
}
void TearDown() override
{
LOG_INFO("tear down success");
}
private:
ObLockMemtable *memtable_;
ObTableHandleV2 table_handle_;
ObTenantMetaMemMgr fake_t3m_;
ObFreezer freezer_;
ObLSID ls_id_;
ObLS *ls_;
ObLSHandle ls_handle_;
ObArenaAllocator allocator_;
};
void TestLockMemtableCheckpoint::SetUpTestCase()
{
LOG_INFO("SetUpTestCase");
init_default_lock_test_value();
EXPECT_EQ(OB_SUCCESS, MockTenantModuleEnv::get_instance().init());
SAFE_DESTROY_INSTANCE.init();
SAFE_DESTROY_INSTANCE.start();
ObServerCheckpointSlogHandler::get_instance().is_started_ = true;
}
void TestLockMemtableCheckpoint::TearDownTestCase()
{
LOG_INFO("TearDownTestCase");
SAFE_DESTROY_INSTANCE.stop();
SAFE_DESTROY_INSTANCE.wait();
SAFE_DESTROY_INSTANCE.destroy();
MockTenantModuleEnv::get_instance().destroy();
}
TEST_F(TestLockMemtableCheckpoint, replay_disorder)
{
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder");
EXPECT_EQ(OB_SYS_TENANT_ID, MTL_ID());
int ret = OB_SUCCESS;
ObCreateLSArg arg;
share::SCN commit_version;
share::SCN commit_scn;
commit_version.set_base();
commit_scn.set_base();
// 1. get ls checkpoint
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 1");
ObCheckpointExecutor *checkpoint_executor = ls_->get_checkpoint_executor();
ObCommonCheckpoint *checkpoint =
dynamic_cast<ObLSTxService *>(
checkpoint_executor
->handlers_[logservice::TRANS_SERVICE_LOG_BASE_TYPE])
->common_checkpoints_[ObCommonCheckpointType::LOCK_MEMTABLE_TYPE];
// 2.recover unlock op and lock op
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 2");
ret = memtable_->recover_obj_lock(DEFAULT_OUT_TRANS_UNLOCK_OP);
ASSERT_EQ(OB_SUCCESS, ret);
ret = memtable_->recover_obj_lock(DEFAULT_OUT_TRANS_LOCK_OP);
ASSERT_EQ(OB_SUCCESS, ret);
// 3. update lock status disorder
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 3");
commit_version.val_ = 3;
commit_scn.val_ = 3;
ret = memtable_->update_lock_status(DEFAULT_OUT_TRANS_UNLOCK_OP,
commit_version,
commit_scn,
COMMIT_LOCK_OP_STATUS);
ASSERT_EQ(OB_SUCCESS, ret);
commit_version.val_ = 2;
commit_scn.val_ = 2;
ret = memtable_->update_lock_status(DEFAULT_OUT_TRANS_LOCK_OP,
commit_version,
commit_scn,
COMMIT_LOCK_OP_STATUS);
ASSERT_EQ(OB_SUCCESS, ret);
// 4. check checkpoint
// The rec_scn should be equal with the smaller commit_scn
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 4");
ASSERT_EQ(commit_scn.val_, memtable_->get_rec_scn().val_);
share::SCN rec_scn = checkpoint->get_rec_scn();
ASSERT_EQ(commit_scn.val_, rec_scn.val_);
// 5. flush and get a previous commit log
// You will find the log about disordered replay in the log file.
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 5");
ret = memtable_->recover_obj_lock(DEFAULT_OUT_TRANS_UNLOCK_OP);
ASSERT_EQ(OB_SUCCESS, ret);
ASSERT_EQ(OB_SUCCESS, checkpoint->flush(share::SCN::max_scn()));
commit_version.val_ = 1;
commit_scn.val_ = 1;
ret = memtable_->update_lock_status(DEFAULT_OUT_TRANS_UNLOCK_OP,
commit_version,
commit_scn,
COMMIT_LOCK_OP_STATUS);
ASSERT_EQ(OB_SUCCESS, ret);
// 6. check checkpoint
// The rec_scn should be equal with the smaller commit_scn
// during flushing (i.e. it's get from pre_rec_scn)
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 6");
ASSERT_EQ(commit_scn.val_, memtable_->get_rec_scn().val_);
rec_scn = checkpoint->get_rec_scn();
ASSERT_EQ(commit_scn.val_, rec_scn.val_);
// 7. get a commit log with a commit_scn which
// is larger than freeze_scn during flushing
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 7");
ret = memtable_->recover_obj_lock(DEFAULT_OUT_TRANS_LOCK_OP);
ASSERT_EQ(OB_SUCCESS, ret);
commit_version.val_ = 4;
commit_scn.val_ = 4;
ret = memtable_->update_lock_status(DEFAULT_OUT_TRANS_LOCK_OP,
commit_version,
commit_scn,
COMMIT_LOCK_OP_STATUS);
// 8. check checkpoint
// The rec_scn should still be equal with the smaller
// commit_scn during flushing (i.e. it's get from pre_rec_scn)
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 8");
ASSERT_EQ(1, memtable_->get_rec_scn().val_);
rec_scn = checkpoint->get_rec_scn();
ASSERT_EQ(1, rec_scn.val_);
// 9. flush finish
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 9");
ret = memtable_->on_memtable_flushed();
ASSERT_EQ(OB_SUCCESS, ret);
// 10. check checkpoint
// The rec_scn should be equal with the latest commit_scn
// which got during previous flushing (i.e. it's get from rec_scn)
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 10");
ASSERT_EQ(commit_scn.val_, memtable_->get_rec_scn().val_);
rec_scn = checkpoint->get_rec_scn();
ASSERT_EQ(commit_scn.val_, rec_scn.val_);
// 11. clean up
LOG_INFO("TestLockMemtableCheckpoint::replay_disorder 11");
table_handle_.reset();
ls_handle_.reset();
ASSERT_EQ(OB_SUCCESS, MTL(ObLSService*)->remove_ls(ls_id_, false));
}
} // namespace tablelock
} // namespace transaction
} // namespace oceanbase
int main(int argc, char **argv)
{
oceanbase::common::ObLogger::get_logger().set_file_name("test_lock_memtable_checkpoint.log", true);
oceanbase::common::ObLogger::get_logger().set_log_level("INFO");
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}

36
src/storage/tablelock/ob_lock_memtable.cpp
View File

@ -49,7 +49,7 @@ ObLockMemtable::ObLockMemtable()
freeze_scn_(SCN::min_scn()),
flushed_scn_(SCN::min_scn()),
rec_scn_(SCN::max_scn()),
pre_rec_scn_(),
pre_rec_scn_(SCN::max_scn()),
max_committed_scn_(),
is_frozen_(false),
freezer_(nullptr),
@ -98,7 +98,7 @@ int ObLockMemtable::init(
void ObLockMemtable::reset()
{
rec_scn_.set_max();
pre_rec_scn_.reset();
pre_rec_scn_.set_max();
max_committed_scn_.reset();
ls_id_.reset();
ObITable::reset();
@ -519,7 +519,14 @@ int ObLockMemtable::update_lock_status(
} else if ((OUT_TRANS_LOCK == op_info.op_type_ || OUT_TRANS_UNLOCK == op_info.op_type_)
&& LOCK_OP_COMPLETE == status) {
RLockGuard guard(flush_lock_);
if (commit_scn <= freeze_scn_) {
LOG_INFO("meet disordered replay, will dec_update pre_rec_scn_", K(ret),
K(op_info), K(commit_scn), K(rec_scn_), K(pre_rec_scn_),
K(freeze_scn_), K(ls_id_));
pre_rec_scn_.dec_update(commit_scn);
} else {
rec_scn_.dec_update(commit_scn);
}
max_committed_scn_.inc_update(commit_scn);
LOG_INFO("out_trans update_lock_status", K(ret), K(op_info), K(commit_scn), K(status), K(rec_scn_), K(ls_id_));
}
@ -740,10 +747,27 @@ SCN ObLockMemtable::get_rec_scn()
LOG_INFO("rec_scn of ObLockMemtable is ",
K(rec_scn_), K(flushed_scn_), K(pre_rec_scn_),
K(freeze_scn_), K(max_committed_scn_), K(is_frozen_), K(ls_id_));
if (!pre_rec_scn_.is_valid()) {
// If pre_rec_scn_ is max, it means that previous memtable
// has already been flushed. In ohter words, it means that
// rec_scn_ is ready to work, so we can return rec_scn_.
// You can regard max_scn as an invalid value for pre_rec_scn_ here.
// (As a matter of fact, max_scn means pre_rec_scn_ or rec_scn_
// will not block checkpoint advancing.)
//
// Specifically, if there's a commit_scn which is smaller
// than the freeze_scn_, the pre_rec_scn_ will be set to
// an valid value (i.e. not max_scn) again, it's a special
// case in disordered replay.
// You can see details about this case in update_lock_status.
if (pre_rec_scn_.is_max()) {
return rec_scn_;
} else {
return pre_rec_scn_;
if (pre_rec_scn_ > rec_scn_) {
LOG_INFO("prec_rec_scn_ is larger than rec_scn_!", K(pre_rec_scn_),
K(rec_scn_), K(flushed_scn_), K(freeze_scn_),
K(max_committed_scn_), K(is_frozen_), K(ls_id_));
}
return share::SCN::min(pre_rec_scn_, rec_scn_);
}
}
@ -761,7 +785,7 @@ int ObLockMemtable::on_memtable_flushed()
{
int ret = OB_SUCCESS;
WLockGuard guard(flush_lock_);
pre_rec_scn_.reset();
pre_rec_scn_.set_max();
if (freeze_scn_ > flushed_scn_) {
flushed_scn_ = freeze_scn_;
} else {
@ -802,7 +826,7 @@ int ObLockMemtable::flush(SCN recycle_scn,
LOG_INFO("lock memtable no need to flush", K(rec_scn), K(recycle_scn),
K(is_frozen_), K(ls_id_));
} else if (is_active_memtable()) {
freeze_scn_ = max_committed_scn_;
freeze_scn_.inc_update(max_committed_scn_);
if (flushed_scn_ >= freeze_scn_) {
LOG_INFO("skip freeze because of flushed", K_(ls_id), K_(flushed_scn), K_(freeze_scn));
} else {