Assertion `! (&(&LOCK_open)->m_mutex)->count || ! pthread_equal(pth read_self(), (&(&LOCK_open)->m_mutex)->thread)' fails in intern_sys_var_ptr on server shutdown after uninstalling TokuDB plugin at runtime

# It's not necessary to install TokuDB at runtime, 

# instead the server can be run with --plugin-load=ha_tokudb

INSTALL SONAME 'ha_tokudb';

DROP TABLE IF EXISTS t1;

CREATE TABLE t1 (a INT) ENGINE=TokuDB;

INSERT INTO t1 VALUES (1),(2);

UNINSTALL SONAME 'ha_tokudb';

# Let server to shutdown (with MTR, it happens on its own)

5.5/sql/sql_plugin.cc:2903: uchar* intern_sys_var_ptr(THD*, int, bool): Assertion `! (&(&LOCK_open)->m_mutex)->count || ! pthread_equal(pthread_self(), (&(&LOCK_open)->m_mutex)->thread)' failed.

140412 20:09:03 [ERROR] mysqld got signal 6 ;

#6  0x00007f6db3ad1621 in *__GI___assert_fail (assertion=0xd8d6c0 "! (&(&LOCK_open)->m_mutex)->count || ! pthread_equal(pthread_self(), (&(&LOCK_open)->m_mutex)->thread)", file=<optimized out>, line=2903, function=0xd8e500 "uchar* intern_sys_var_ptr(THD*, int, bool)") at assert.c:81

#7  0x00000000006476df in intern_sys_var_ptr (thd=0x0, offset=136, global_lock=false) at /home/elenst/bzr/5.5/sql/sql_plugin.cc:2903

#8  0x00000000006482ce in sys_var_pluginvar::real_value_ptr (this=0x7f6db23fe248, thd=0x0, type=OPT_GLOBAL) at /home/elenst/bzr/5.5/sql/sql_plugin.cc:3220

#9  0x000000000064809a in plugin_vars_free_values (vars=0x7f6db33fb090) at /home/elenst/bzr/5.5/sql/sql_plugin.cc:3156

#10 0x0000000000642f11 in plugin_del (plugin=0x7f6db33f53a8) at /home/elenst/bzr/5.5/sql/sql_plugin.cc:1202

#11 0x0000000000643161 in reap_plugins () at /home/elenst/bzr/5.5/sql/sql_plugin.cc:1247

#12 0x000000000064342a in plugin_unlock (thd=0x0, plugin=0x7f6d9e01d460) at /home/elenst/bzr/5.5/sql/sql_plugin.cc:1314

#13 0x00000000006f08a4 in TABLE_SHARE::destroy (this=0x7f6daf67ad78) at /home/elenst/bzr/5.5/sql/table.cc:426

#14 0x00000000006f0aa2 in free_table_share (share=0x7f6daf67ad78) at /home/elenst/bzr/5.5/sql/table.cc:480

#15 0x00000000005cedb8 in table_def_free_entry (share=0x7f6daf67ad78) at /home/elenst/bzr/5.5/sql/sql_base.cc:368

#16 0x0000000000cb57d2 in my_hash_delete (hash=0x15877a0, record=0x7f6daf67ad78 "\002") at /home/elenst/bzr/5.5/mysys/hash.c:604

#17 0x00000000005cfb57 in release_table_share (share=0x7f6daf67ad78) at /home/elenst/bzr/5.5/sql/sql_base.cc:794

#18 0x00000000006f7452 in closefrm (table=0x7f6d9e1e7c60, free_share=true) at /home/elenst/bzr/5.5/sql/table.cc:2761

#19 0x00000000005d013a in intern_close_table (table=0x7f6d9e1e7c60) at /home/elenst/bzr/5.5/sql/sql_base.cc:928

#20 0x00000000005d01a7 in free_cache_entry (table=0x7f6d9e1e7c60) at /home/elenst/bzr/5.5/sql/sql_base.cc:951

#21 0x00000000005d0525 in close_cached_tables (thd=0x0, tables=0x0, wait_for_refresh=false, timeout=31536000) at /home/elenst/bzr/5.5/sql/sql_base.cc:1058

#22 0x00000000005ceef1 in table_def_start_shutdown () at /home/elenst/bzr/5.5/sql/sql_base.cc:410

#23 0x00000000005845e4 in clean_up (print_message=true) at /home/elenst/bzr/5.5/sql/mysqld.cc:1821

#24 0x00000000005843d0 in unireg_end () at /home/elenst/bzr/5.5/sql/mysqld.cc:1734

#25 0x00000000005842f2 in kill_server (sig_ptr=0x0) at /home/elenst/bzr/5.5/sql/mysqld.cc:1662

#26 0x000000000058430f in kill_server_thread (arg=0x7f6d9dbfee48) at /home/elenst/bzr/5.5/sql/mysqld.cc:1685

#27 0x0000000000b61755 in pfs_spawn_thread (arg=0x7f6d9dc271c0) at /home/elenst/bzr/5.5/storage/perfschema/pfs.cc:1015

#28 0x00007f6db5031b50 in start_thread (arg=<optimized out>) at pthread_create.c:304

#29 0x00007f6db3b80a7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112

revision-id: knielsen@knielsen-hq.org-20140411084611-oygkym1990hgbuhe

date: 2014-04-11 10:46:11 +0200

build-date: 2014-04-12 21:42:44 +0400

revno: 4133

branch-nick: 5.5

==2806== 212 bytes in 1 blocks are still reachable in loss record 9 of 10

==2806==    at 0x4C28CCE: malloc (vg_replace_malloc.c:292)

==2806==    by 0xE3853F: sf_malloc (safemalloc.c:115)

==2806==    by 0xE276A6: my_malloc (my_malloc.c:100)

==2806==    by 0xD63B40C: ???

==2806==    by 0xD63EEA2: ???

==2806==    by 0xD64F7DE: ???

==2806==    by 0x869CC7: handler::ha_external_lock(THD*, int) (handler.cc:5843)

==2806==    by 0x93F723: lock_external(THD*, TABLE**, unsigned int) (lock.cc:357)

==2806==    by 0x93F4A3: mysql_lock_tables(THD*, st_mysql_lock*, unsigned int) (lock.cc:309)

==2806==    by 0x93F3B4: mysql_lock_tables(THD*, TABLE**, unsigned int, unsigned int) (lock.cc:276)

==2806==    by 0x61937F: lock_tables(THD*, TABLE_LIST*, unsigned int, unsigned int) (sql_base.cc:5310)

==2806==    by 0x618B3A: open_and_lock_tables(THD*, TABLE_LIST*, bool, unsigned int, Prelocking_strategy*) (sql_base.cc:5081)

==2806==    by 0x60D1E2: open_and_lock_tables(THD*, TABLE_LIST*, bool, unsigned int) (sql_base.h:485)

==2806==    by 0x655BE1: mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item> >&, List<Item>&, List<Item>&, enum_duplicates, bool) (sql_insert.cc:722)

==2806==    by 0x676262: mysql_execute_command(THD*) (sql_parse.cc:3471)

==2806==    by 0x67E48E: mysql_parse(THD*, char*, unsigned int, Parser_state*) (sql_parse.cc:6452)

revision-id: elenst@montyprogram.com-20140410221003-dea2djgc31gbu3lu

date: 2014-04-11 02:10:03 +0400

build-date: 2014-04-12 21:43:05 +0400

revno: 4148

branch-nick: 10.0