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fix deadlock

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This commit is contained in:
simonjoylet
2022-12-05 16:05:59 +00:00
committed by ob-robot
parent ddec7a833d
commit e7671e920c
1 changed files with 31 additions and 22 deletions
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15
src/storage/ddl/ob_tablet_ddl_kv_mgr.cpp
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@ -96,7 +96,8 @@ int ObTabletDDLKvMgr::ddl_start(const ObITable::TableKey &table_key,
{
int ret = OB_SUCCESS;
bool is_brand_new = false;
TCWLockGuard guard(lock_);
SCN saved_start_scn;
int64_t saved_snapshot_version = 0;
if (OB_UNLIKELY(!is_inited_)) {
ret = OB_NOT_INIT;
LOG_WARN("not init", K(ret), K(is_inited_));
@ -107,7 +108,9 @@ int ObTabletDDLKvMgr::ddl_start(const ObITable::TableKey &table_key,
} else if (table_key.get_tablet_id() != tablet_id_) {
ret = OB_ERR_SYS;
LOG_WARN("tablet id not same", K(ret), K(table_key), K(tablet_id_));
} else if (start_scn_.is_valid_and_not_min()) {
} else {
TCWLockGuard guard(lock_);
if (start_scn_.is_valid_and_not_min()) {
if (execution_id >= execution_id_ && start_scn >= start_scn_) {
LOG_INFO("execution id changed, need cleanup", K(ls_id_), K(tablet_id_), K(execution_id_), K(execution_id), K(start_scn_), K(start_scn));
cleanup_unlock();
@ -129,9 +132,15 @@ int ObTabletDDLKvMgr::ddl_start(const ObITable::TableKey &table_key,
start_scn_ = start_scn;
max_freeze_scn_ = SCN::max(start_scn, checkpoint_scn);
}
if (OB_SUCC(ret)) {
// save variables under lock
saved_start_scn = start_scn_;
saved_snapshot_version = table_key_.get_snapshot_version();
}
}
if (OB_SUCC(ret) && !checkpoint_scn.is_valid_and_not_min()) {
// remove ddl sstable if exists and flush ddl start log ts and snapshot version into tablet meta
if (OB_FAIL(update_tablet(start_scn_, table_key_.get_snapshot_version(), start_scn_))) {
if (OB_FAIL(update_tablet(saved_start_scn, saved_snapshot_version, saved_start_scn))) {
LOG_WARN("clean up ddl sstable failed", K(ret), K(ls_id_), K(tablet_id_));
}
}