mirror of
https://github.com/MariaDB/server.git
synced 2025-10-12 12:25:37 +03:00
26432e49d3
This patch contains a fix for the MDEV-17262/17243 issues and new mtr test. These issues (MDEV-17262/17243) have two reasons: 1) After an intermediate commit, a transaction loses its status of "transaction that registered in the MySQL for 2pc coordinator" (in the InnoDB) due to the fact that since version 10.2 the write_row() function (which located in the ha_innodb.cc) does not call trx_register_for_2pc(m_prebuilt->trx) during the processing of split transactions. It is necessary to restore this call inside the write_row() when an intermediate commit was made (for a split transaction). Similarly, we need to set the flag of the started transaction (m_prebuilt->sql_stat_start) after intermediate commit. The table->file->extra(HA_EXTRA_FAKE_START_STMT) called from the wsrep_load_data_split() function (which located in sql_load.cc) will also do this, but it will be too late. As a result, the call to the wsrep_append_keys() function from the InnoDB engine may be lost or function may be called with invalid transaction identifier. 2) If a transaction with the LOAD DATA statement is divided into logical mini-transactions (of the 10K rows) and binlog is rotated, then in rare cases due to the wsrep handler re-registration at the boundary of the split, the last portion of data may be lost. Since splitting of the LOAD DATA into mini-transactions is technical, I believe that we should not allow these mini-transactions to fall into separate binlogs. Therefore, it is necessary to prohibit the rotation of binlog in the middle of processing LOAD DATA statement. https://jira.mariadb.org/browse/MDEV-17262 and https://jira.mariadb.org/browse/MDEV-17243
37 lines
978 B
Plaintext
37 lines
978 B
Plaintext
connection node_1;
|
|
connection node_2;
|
|
connection node_3;
|
|
connection node_1;
|
|
CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;
|
|
connection node_2;
|
|
connection node_3;
|
|
SET GLOBAL wsrep_provider_options = 'gmcast.isolate = 1';
|
|
SET SESSION wsrep_on = OFF;
|
|
SET SESSION wsrep_on = ON;
|
|
SET SESSION wsrep_sync_wait = 0;
|
|
connection node_2a;
|
|
SET SESSION wsrep_sync_wait = 0;
|
|
connection node_2;
|
|
SET GLOBAL wsrep_load_data_splitting = TRUE;
|
|
SET DEBUG_SYNC='intermediate_transaction_commit SIGNAL commited WAIT_FOR ist';
|
|
connection node_2a;
|
|
SET DEBUG_SYNC='now WAIT_FOR commited';
|
|
connection node_3;
|
|
SET GLOBAL wsrep_provider_options = 'gmcast.isolate = 0';
|
|
connection node_2a;
|
|
SET DEBUG_SYNC='now SIGNAL ist';
|
|
connection node_1;
|
|
connection node_2;
|
|
SET DEBUG_SYNC='RESET';
|
|
SELECT COUNT(*) = 95000 FROM t1;
|
|
COUNT(*) = 95000
|
|
1
|
|
wsrep_last_committed_diff
|
|
1
|
|
connection node_1;
|
|
SET GLOBAL wsrep_load_data_splitting = 1;;
|
|
DROP TABLE t1;
|
|
disconnect node_3;
|
|
disconnect node_2;
|
|
disconnect node_1;
|