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MDEV-13779 InnoDB fails to shut down purge, causing hang

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thd_destructor_proxy(): Ensure that purge actually exits,
like the logic should have been ever since MDEV-14080.

srv_purge_shutdown(): A new function to wait for the
purge coordinator to exit. Before exiting, the
purge coordinator will ensure that all purge workers have exited.
This commit is contained in:
Marko Mäkelä 2018-05-24 15:30:22 +03:00
parent 52df804026
commit 1c8c6bcd6f
3 changed files with 14 additions and 2 deletions
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2
storage/innobase/handler/ha_innodb.cc
View File

@ -354,7 +354,7 @@ thd_destructor_proxy(void *)
need to be purged, so they have to be shut down before purge
threads if slow shutdown is requested. */
srv_shutdown_bg_undo_sources();
srv_purge_wakeup();
srv_purge_shutdown();
destroy_thd(thd);
mysql_cond_destroy(&thd_destructor_cond);

5
storage/innobase/include/srv0srv.h
View File

@ -3,7 +3,7 @@
Copyright (c) 1995, 2017, Oracle and/or its affiliates. All rights reserved.
Copyright (c) 2008, 2009, Google Inc.
Copyright (c) 2009, Percona Inc.
Copyright (c) 2013, 2017, MariaDB Corporation.
Copyright (c) 2013, 2018, MariaDB Corporation.
Portions of this file contain modifications contributed and copyrighted by
Google, Inc. Those modifications are gratefully acknowledged and are described
@ -920,6 +920,9 @@ srv_release_threads(enum srv_thread_type type, ulint n);
void
srv_purge_wakeup();
/** Shut down the purge threads. */
void srv_purge_shutdown();
/** Check if tablespace is being truncated.
(Ignore system-tablespace as we don't re-create the tablespace
and so some of the action that are suppressed by this function

9
storage/innobase/srv/srv0srv.cc
View File

@ -2963,6 +2963,15 @@ srv_purge_wakeup()
|| srv_sys.n_threads_active[SRV_PURGE]));
}
/** Shut down the purge threads. */
void srv_purge_shutdown()
{
do {
ut_ad(!srv_undo_sources);
srv_purge_wakeup();
} while (srv_sys.sys_threads[SRV_PURGE_SLOT].in_use);
}
/** Check if tablespace is being truncated.
(Ignore system-tablespace as we don't re-create the tablespace
and so some of the action that are suppressed by this function