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| author | Marko Mäkelä <marko.makela@oracle.com> | 2011-04-07 21:12:54 +0300 |
|---|---|---|
| committer | Marko Mäkelä <marko.makela@oracle.com> | 2011-04-07 21:12:54 +0300 |
| commit | 0ff2a182b67ea433d9070628696e648dff170fdd (patch) | |
| tree | f58bb01c6294e316406a4e19ff8b1daad128c700 /storage/innobase/include/trx0trx.h | |
| parent | acedd7a4a5542288b30969ff5a6f11566458e9d4 (diff) | |
| download | mariadb-git-0ff2a182b67ea433d9070628696e648dff170fdd.tar.gz | |
Bug #11766513 - 59641: Prepared XA transaction in system after hard crash
causes future shutdown hang
InnoDB would hang on shutdown if any XA transactions exist in the
system in the PREPARED state. This has been masked by the fact that
MySQL would roll back any PREPARED transaction on shutdown, in the
spirit of Bug #12161 Xa recovery and client disconnection.
[mysql-test-run] do_shutdown_server: Interpret --shutdown_server 0 as
a request to kill the server immediately without initiating a
shutdown procedure.
xid_cache_insert(): Initialize XID_STATE::rm_error in order to avoid a
bogus error message on XA ROLLBACK of a recovered PREPARED transaction.
innobase_commit_by_xid(), innobase_rollback_by_xid(): Free the InnoDB
transaction object after rolling back a PREPARED transaction.
trx_get_trx_by_xid(): Only consider transactions whose
trx->is_prepared flag is set. The MySQL layer seems to prevent
attempts to roll back connected transactions that are in the PREPARED
state from another connection, but it is better to play it safe. The
is_prepared flag was introduced in the InnoDB Plugin.
trx_n_prepared: A new counter, counting the number of InnoDB
transactions in the PREPARED state.
logs_empty_and_mark_files_at_shutdown(): On shutdown, allow
trx_n_prepared transactions to exist in the system.
trx_undo_free_prepared(), trx_free_prepared(): New functions, to free
the memory objects of PREPARED transactions on shutdown. This is not
needed in the built-in InnoDB, because it would collect all allocated
memory on shutdown. The InnoDB Plugin needs this because of
innodb_use_sys_malloc.
trx_sys_close(): Invoke trx_free_prepared() on all remaining
transactions.
Diffstat (limited to 'storage/innobase/include/trx0trx.h')
| -rw-r--r-- | storage/innobase/include/trx0trx.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/storage/innobase/include/trx0trx.h b/storage/innobase/include/trx0trx.h index 4652f45892e..7cb16107746 100644 --- a/storage/innobase/include/trx0trx.h +++ b/storage/innobase/include/trx0trx.h @@ -19,7 +19,12 @@ Created 3/26/1996 Heikki Tuuri #include "dict0types.h" #include "trx0xa.h" +/* Number of transactions currently allocated for MySQL: protected by +the kernel mutex */ extern ulint trx_n_mysql_transactions; +/* Number of transactions currently in the XA PREPARED state: protected by +the kernel mutex */ +extern ulint trx_n_prepared; /************************************************************************ Releases the search latch if trx has reserved it. */ |