It was introduced by this patch in fb/mysql-5.6:
Author: Yoshinori Matsunobu <yoshinori@fb.com>
Date: Mon Jun 10 14:09:28 2019 -0700
Extending SHUTDOWN query to support read_only/aborting
Summary:
This diff extends SHUTDOWN query to support the following
features.
- Aborting with any specified exit code (range is 0..255).
If nothing is specified or 0 is given, it does default clean
shutdown. If 1+ is given, exits with the given error code
immediately. This is helpful to shutting down instance
even if it is stuck somewhere.
MariaDB doesn't support SHUTDOWN statement or have any other way
to exit the server process.
Use RocksDB debug sync points to introduce a sync delay. This
commits to get grouped even when the datadir is on ramdisk.
For some unclear reason the effect is visible on write_prepared
but not write_committed, so run the test only with write_prepared.
MDEV-19486 and one more similar bug appeared because handler::write_row() interface
welcomes to modify buffer by storage engine. But callers are not ready for that
thus bugs are possible in future.
handler::write_row():
handler::ha_write_row(): make argument const
MariaDB doesn't support Read-Free replication, so showing them only causes
confusion.
Removed variables:
- @@rocksdb_read_free_rpl
- @@rocksdb_read_free_rpl_tables
- Don't add DZSTD_STATIC_LINKING_ONLY
- Don't use upstream's way of linking with Jemalloc (MyRocks/MariaDB has
its own in build_rocksdb.cmake)
- Don't depend on libunwind
Copy of
commit dcd9379eb5707bc7514a2ff4d9127790356505cb
Author: Manuel Ung <mung@fb.com>
Date: Fri Jun 14 10:38:17 2019 -0700
Skip valgrind for rocksdb.force_shutdown
Summary:
This test does unclean shutdown, and leaks memory.
Squash with: D15749084
Reviewed By: hermanlee
Differential Revision: D15828957
fbshipit-source-id: 30541455d74
Fix both code paths:
- Change the test source code so it doesn't cause the "Unused variable"
warning (which -Werror converted into error and caused CMake not to set
HAVE_THREAD_LOCAL)
- If the system doesn't seem to support HAVE_THREAD_LOCAL, refuse to
compile (rather than producing a binary that crashes for some tests)
Originally submitted at https://github.com/facebook/mysql-5.6/pull/905
Use thd_get_ha_data()/thd_set_ha_data() which protect against plugin
removal until it has THD ha_data.
Do not reset THD ha_data in rocksdb_close_connection(), cleaner approach
is to let ha_close_connection() do it.
Removed transaction objects cleanup from rocksdb_done_func(). As we lock
plugin properly, there must be no transaction objects during RocksDB
shutdown.
