Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.5, 10.4(EOL)
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None
Description
Note: The description was updated much later than the comments were added. The comments discuss the initial report, which only had the stack trace, without a test case or any other indication how the problem could be reproduced.
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10.4 88cf6f1c7f with the injection below |
2020-04-25 4:55:50 0 [Note] /data/src/10.4-bug/sql/mysqld (initiated by: root[root] @ localhost []): Normal shutdown
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2020-04-25 4:55:50 0 [Note] Event Scheduler: Purging the queue. 0 events
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mysqld: /data/src/10.4-bug/storage/maria/ma_pagecache.c:1133: check_pagecache_is_cleaned_up: Assertion `pagecache->cnt_for_resize_op == 0' failed.
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200425 4:55:50 [ERROR] mysqld got signal 6 ;
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#6 0x00007f355a45840f in __assert_fail_base (fmt=0x7f355a5baee0 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x55a54b2bb2a8 "pagecache->cnt_for_resize_op == 0", file=0x55a54b2baf78 "/data/src/10.4-bug/storage/maria/ma_pagecache.c", line=1133, function=<optimized out>) at assert.c:92
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#7 0x00007f355a466102 in __GI___assert_fail (assertion=0x55a54b2bb2a8 "pagecache->cnt_for_resize_op == 0", file=0x55a54b2baf78 "/data/src/10.4-bug/storage/maria/ma_pagecache.c", line=1133, function=0x55a54b2bd2e0 <__PRETTY_FUNCTION__.18326> "check_pagecache_is_cleaned_up") at assert.c:101
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#8 0x000055a54ac6a97f in check_pagecache_is_cleaned_up (pagecache=0x55a54c287d00 <maria_pagecache_var>) at /data/src/10.4-bug/storage/maria/ma_pagecache.c:1133
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#9 0x000055a54ac6aba0 in end_pagecache (pagecache=0x55a54c287d00 <maria_pagecache_var>, cleanup=1 '\001') at /data/src/10.4-bug/storage/maria/ma_pagecache.c:1175
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#10 0x000055a54ac862ba in maria_end () at /data/src/10.4-bug/storage/maria/ma_init.c:110
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#11 0x000055a54acd2157 in maria_panic (flag=HA_PANIC_CLOSE) at /data/src/10.4-bug/storage/maria/ma_panic.c:135
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#12 0x000055a54ac478c6 in maria_hton_panic (hton=0x55a54dd19590, flag=HA_PANIC_CLOSE) at /data/src/10.4-bug/storage/maria/ha_maria.cc:3347
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#13 0x000055a54a5a8fe9 in ha_finalize_handlerton (plugin=0x55a54dd0ba88) at /data/src/10.4-bug/sql/handler.cc:496
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#14 0x000055a54a271157 in plugin_deinitialize (plugin=0x55a54dd0ba88, ref_check=true) at /data/src/10.4-bug/sql/sql_plugin.cc:1241
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#15 0x000055a54a2716c1 in reap_plugins () at /data/src/10.4-bug/sql/sql_plugin.cc:1317
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#16 0x000055a54a273ae0 in plugin_shutdown () at /data/src/10.4-bug/sql/sql_plugin.cc:1986
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#17 0x000055a54a115e20 in clean_up (print_message=true) at /data/src/10.4-bug/sql/mysqld.cc:1988
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#18 0x000055a54a11e4ed in mysqld_main (argc=130, argv=0x55a54dbd98d0) at /data/src/10.4-bug/sql/mysqld.cc:5922
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#19 0x000055a54a112275 in main (argc=6, argv=0x7fffa3e800b8) at /data/src/10.4-bug/sql/main.cc:25
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Debug injection for 10.4, e.g. 88cf6f1c7f |
diff --git a/storage/maria/ma_pagecache.c b/storage/maria/ma_pagecache.c
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index f486d8c704f..9f02355b44f 100644
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--- a/storage/maria/ma_pagecache.c
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+++ b/storage/maria/ma_pagecache.c
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@@ -4416,6 +4416,7 @@ static int flush_cached_blocks(PAGECACHE *pagecache,
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@todo change argument of functions to be File.
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*/
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pagecache_pthread_mutex_unlock(&pagecache->cache_lock);
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+ DBUG_EXECUTE_IF("sleep_mutex",{while(pagecache->cache_lock.m_mutex.thread == 0) my_sleep(100000);};);
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error= pagecache_fwrite(pagecache, &block->hash_link->file,
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block->buffer,
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block->hash_link->pageno,
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Even with the injection above, the test case is still non-deterministic, run with --repeat=N if it doesn't fail right away. Currently it fails for me roughly every other time.
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Test case to be run with the injection above |
--source include/restart_mysqld.inc
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CREATE TABLE t1 (pk INT, a VARCHAR(8), PRIMARY KEY(pk)) ENGINE=Aria TRANSACTIONAL=1; |
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--connect (con1,localhost,root,,test)
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BACKUP STAGE START;
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SET debug_dbug= '+d,sleep_mutex'; |
--send
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BACKUP STAGE BLOCK_COMMIT;
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--connection default
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INSERT INTO t1 VALUES (1,'a'); |
INSERT INTO t1 VALUES (2,'b'); |
INSERT INTO t1 VALUES (3,'c'); |
INSERT INTO t1 VALUES (4,'c'); |
INSERT INTO t1 VALUES (5,'c'); |
INSERT INTO t1 VALUES (6,'c'); |
INSERT INTO t1 VALUES (7,'c'); |
INSERT INTO t1 VALUES (8,'c'); |
INSERT INTO t1 VALUES (9,'c'); |
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--connection con1
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--reap
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--sleep 1
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--source include/restart_mysqld.inc
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DROP TABLE t1; |