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[master] savepoint rollback may rollback future data

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This commit is contained in:
chinaxing
2023-09-08 11:07:24 +08:00
committed by ob-robot
parent 48624219c7
commit 7feac6b5e7
3 changed files with 20 additions and 19 deletions
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30
src/storage/tx/ob_trans_part_ctx.cpp
View File

@ -7213,10 +7213,9 @@ int ObPartTransCtx::check_status_()
* purpose:
* 1) verify transaction ctx is *writable*
* 2) acquire memtable ctx's ref
* 3) remember data_scn
* 3) alloc data_scn
*/
int ObPartTransCtx::start_access(const ObTxDesc &tx_desc,
const ObTxSEQ data_scn)
int ObPartTransCtx::start_access(const ObTxDesc &tx_desc, ObTxSEQ &data_scn)
{
int ret = OB_SUCCESS;
CtxLockGuard guard(lock_);
@ -7225,14 +7224,18 @@ int ObPartTransCtx::start_access(const ObTxDesc &tx_desc,
ret = OB_TRANS_SQL_SEQUENCE_ILLEGAL;
TRANS_LOG(WARN, "stale access operation", K(ret),
K_(tx_desc.op_sn), K_(last_op_sn), KPC(this), K(tx_desc));
} else if (FALSE_IT(++pending_write_)) {
} else if (FALSE_IT(last_scn_ = MAX(data_scn, last_scn_))) {
} else if (!first_scn_.is_valid() && FALSE_IT(first_scn_ = last_scn_)) {
} else if (tx_desc.op_sn_ != last_op_sn_) {
} else {
if (!data_scn.is_valid()) {
data_scn = tx_desc.inc_and_get_tx_seq(0);
}
++pending_write_;
last_scn_ = MAX(data_scn, last_scn_);
if (!first_scn_.is_valid()) {
first_scn_ = last_scn_;
}
if (tx_desc.op_sn_ != last_op_sn_) {
last_op_sn_ = tx_desc.op_sn_;
}
if (OB_SUCC(ret)) {
mt_ctx_.inc_ref();
mt_ctx_.acquire_callback_list();
}
@ -7318,14 +7321,13 @@ int ObPartTransCtx::rollback_to_savepoint(const int64_t op_sn,
K(trans_id_), K(ls_id_), K(busy_cbs_.get_size()));
} else if (op_sn < last_op_sn_) {
ret = OB_TRANS_SQL_SEQUENCE_ILLEGAL;
} else if (op_sn > last_op_sn_ && last_scn_ <= to_scn) {
last_op_sn_ = op_sn;
TRANS_LOG(INFO, "rollback succeed trivially", K(op_sn), K(to_scn), K_(last_scn));
} else if (op_sn > last_op_sn_ && pending_write_ > 0) {
} else if (FALSE_IT(last_op_sn_ = op_sn)) {
} else if (pending_write_ > 0) {
ret = OB_NEED_RETRY;
TRANS_LOG(WARN, "has pending write, rollback blocked",
K(ret), K(pending_write_), KPC(this));
} else if (FALSE_IT(last_op_sn_ = op_sn)) {
} else if (last_scn_ <= to_scn) {
TRANS_LOG(INFO, "rollback succeed trivially", K(op_sn), K(to_scn), K_(last_scn));
} else if (OB_FAIL(rollback_to_savepoint_(from_scn, to_scn))) {
TRANS_LOG(WARN, "rollback_to_savepoint fail", K(ret),
K(from_scn), K(to_scn), K(op_sn), KPC(this));

3
src/storage/tx/ob_trans_part_ctx.h
View File

@ -733,8 +733,7 @@ public:
* @data_seq: the sequence_no of current access
* new created data will marked with this seq no
*/
int start_access(const ObTxDesc &tx_desc,
const ObTxSEQ data_seq);
int start_access(const ObTxDesc &tx_desc, ObTxSEQ &data_seq);
/*
* end_access - end of txn protected resources access
*/

2
src/storage/tx/ob_trans_service_v4.cpp
View File

@ -1079,7 +1079,7 @@ int ObTransService::get_write_store_ctx(ObTxDesc &tx,
int ret = OB_SUCCESS;
const share::ObLSID &ls_id = store_ctx.ls_id_;
ObPartTransCtx *tx_ctx = NULL;
const ObTxSEQ data_scn = spec_seq_no.is_valid() ? spec_seq_no : tx.inc_and_get_tx_seq(0);
ObTxSEQ data_scn = spec_seq_no; // for LOB aux table, spec_seq_no is valid
ObTxSnapshot snap = snapshot.core_;
ObTxTableGuard tx_table_guard;
bool access_started = false;