Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Not a Bug
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N/A
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None
Description
Start by applying the attached patch to 10.11, revision 6ebdd3013a18b01dbecec76b870810329eb76586. It contains 17 additional random usleeps in InnoDB's locking code in storage/innobase/lock/lock0lock.cc (with a few matching extra brackets were needed). Then run the following code using a C based client but not the CLI.
Note: Most of the code in this testcase is repeated to trigger the issue more readily. Using a patched tree, the issue should show as good as every run.
# mysqld options possibly required for replay: --innodb_change_buffering=inserts --innodb_fast_shutdown=1 --innodb_file_per_table=1 |
CREATE DEFINER=root@localhost EVENT e1 ON SCHEDULE EVERY '1' SECOND COMMENT 'a' DO DELETE FROM t; |
SELECT SLEEP(0.2); |
CREATE DEFINER=root@localhost EVENT e2 ON SCHEDULE EVERY '1' SECOND COMMENT 'a' DO DELETE FROM t; |
SELECT SLEEP(0.2); |
CREATE DEFINER=root@localhost EVENT e3 ON SCHEDULE EVERY '1' SECOND COMMENT 'a' DO DELETE FROM t; |
SELECT SLEEP(0.2); |
CREATE DEFINER=root@localhost EVENT e4 ON SCHEDULE EVERY '1' SECOND COMMENT 'a' DO DELETE FROM t; |
SELECT SLEEP(0.1); |
CREATE DEFINER=root@localhost EVENT e4 ON SCHEDULE EVERY '1' SECOND COMMENT 'a' DO DELETE FROM t; |
SET GLOBAL event_scheduler=ON; |
CREATE TABLE t (id INT); |
INSERT INTO t VALUES (1),(1); |
SET GLOBAL innodb_buffer_pool_size=21474836480; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=134217728; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=21474836480; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=134217728; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=21474836480; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=134217728; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=21474836480; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=134217728; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=21474836480; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=134217728; |
SELECT SLEEP(3); |
SET GLOBAL innodb_buffer_pool_size=21474836480; |
SELECT SLEEP(3); |
Leads to:
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10.11.0 ba875e939619baefb08936863a889830f595e426 (Debug) |
Core was generated by `/test/SLEEP_MD071022-mariadb-10.11.0-linux-x86_64-dbg/bin/mysqld --no-defaults'.
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Program terminated with signal SIGSEGV, Segmentation fault.
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#0 lock_sys_t::hash_table::resize (
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this=this@entry=0x55dcb133ba98 <lock_sys+88>, n=n@entry=6553600)
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at /test/10.11_dbg/storage/innobase/lock/lock0lock.cc:123
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[Current thread is 1 (Thread 0x15192d1d4700 (LWP 2940395))]
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(gdb) bt
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#0 lock_sys_t::hash_table::resize (this=this@entry=0x55dcb133ba98 <lock_sys+88>, n=n@entry=6553600) at /test/10.11_dbg/storage/innobase/lock/lock0lock.cc:123
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#1 0x000055dcafbc307b in lock_sys_t::resize (this=0x55dcb133ba40 <lock_sys>, n_cells=6553600) at /test/10.11_dbg/storage/innobase/lock/lock0lock.cc:464
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#2 0x000055dcafdecf88 in buf_pool_t::resize (this=this@entry=0x55dcb0a1f000 <buf_pool>) at /test/10.11_dbg/storage/innobase/buf/buf0buf.cc:1813
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#3 0x000055dcafde1065 in buf_resize_callback () at /test/10.11_dbg/storage/innobase/buf/buf0buf.cc:1860
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#4 0x000055dcafefbe0d in tpool::task_group::execute (this=0x55dcb1365be0 <single_threaded_group>, t=t@entry=0x55dcb1365b40 <buf_resize_task>) at /test/10.11_dbg/tpool/task_group.cc:70
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#5 0x000055dcafefbe95 in tpool::task::execute (this=0x55dcb1365b40 <buf_resize_task>) at /test/10.11_dbg/tpool/task.cc:32
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#6 0x000055dcafef98ab in tpool::thread_pool_generic::worker_main (this=0x55dcb18a14b0, thread_var=0x55dcb18a1f60) at /test/10.11_dbg/tpool/tpool_generic.cc:580
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#7 0x000055dcafefafde in std::__invoke_impl<void, void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__t=<optimized out>, __f=<optimized out>) at /usr/include/c++/9/bits/invoke.h:89
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#8 std::__invoke<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> (__fn=<optimized out>) at /usr/include/c++/9/bits/invoke.h:95
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#9 std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::_M_invoke<0ul, 1ul, 2ul> (this=<optimized out>) at /usr/include/c++/9/thread:244
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#10 std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> >::operator() (this=<optimized out>) at /usr/include/c++/9/thread:251
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#11 std::thread::_State_impl<std::thread::_Invoker<std::tuple<void (tpool::thread_pool_generic::*)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*> > >::_M_run (this=<optimized out>) at /usr/include/c++/9/thread:195
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#12 0x0000151946c11de4 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
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#13 0x0000151946d2b609 in start_thread (arg=<optimized out>) at pthread_create.c:477
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#14 0x0000151946917133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
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10.11.0 ba875e939619baefb08936863a889830f595e426 (Debug) |
2022-10-15 14:37:32 0 [Note] /test/SLEEP_MD071022-mariadb-10.11.0-linux-x86_64-dbg/bin/mysqld: ready for connections.
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Version: '10.11.0-MariaDB-debug' socket: '/test/SLEEP_MD071022-mariadb-10.11.0-linux-x86_64-dbg/socket.sock' port: 12293 MariaDB Server
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2022-10-15 14:37:33 6 [Note] Event Scheduler: scheduler thread started with id 6
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2022-10-15 14:37:33 0 [Note] InnoDB: Resizing buffer pool from 128.000MiB to 20.000GiB (unit = 2.000MiB).
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2022-10-15 14:37:33 0 [Note] InnoDB: Disabling adaptive hash index.
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2022-10-15 14:37:33 0 [Note] InnoDB: Withdrawing blocks to be shrunken.
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2022-10-15 14:37:33 0 [Note] InnoDB: Latching entire buffer pool.
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2022-10-15 14:37:33 0 [Note] InnoDB: Resizing buffer pool from 64 chunks to 10240 chunks.
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2022-10-15 14:37:34 0 [Note] InnoDB: 10176 chunks (1282170 blocks) were added.
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2022-10-15 14:37:34 0 [Note] InnoDB: Resizing other hash tables.
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-EOL-
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