MySQL Bugs: #37695: Assert failure in Falcon (SyncObject destructor) during shutdown

Bug #37695	Assert failure in Falcon (SyncObject destructor) during shutdown
Submitted:	27 Jun 2008 16:29	Modified:	1 Sep 2008 11:35
Reporter:	Oystein Grovlen
Status:	Duplicate
Category:	Server: Falcon	Severity:	S3 (Non-critical)
Version:	mysql-6.0-backup	OS:	Any
Assigned to:	Olav Sandstaa	Target Version:	6.0
Triage:	D3 (Medium)

Description:
A MTR test fails, if I run the following two tests in sequence:

>./mtr backup_tablespace backup_view_on_view

Both tests are reported as passed, but at the end, the test run reports:
mysql-test-run: WARNING: Got errors/warnings while running tests, please examine
"/home/og136792/mysql/shared/mysql-6.0-backup-1/mysql-test/var/log/warnings" for
details.

var/log/warnings: 
===
mysql-test-run: *** ERROR: there were failing test cases
[og136792@fimafeng09 mysql-test]$ cat var/log/warnings
master.err: main.backup_view_on_view: Attempting backtrace. You can use the following
information to find out
===

Looking in master.err, you can see that it fails during shutdown:
===
080627 17:21:36 - mysqld got signal 6 ;
===

The cleaned-up call stack, looks as follows:
===
(Error::debugBreak()+0xe)[0x8554e0]
(Error::error(char const*, ...)+0xf0)[0x8555d6]
(Error::assertionFailed(char const*, int)+0x16)[0x855636]
(SyncObject::~SyncObject [in-charge]()+0x21)[0x81ba47]
(Transaction::~Transaction [in-charge deleting]()+0x1db)[0x82bd65]
(Transaction::release()+0x1f)[0x82941f]
(TransactionManager::~TransactionManager [in-charge]()+0x3b)[0x8b1fa9]
(Database::~Database [in-charge deleting]()+0x26f)[0x84a81f]
(Connection::shutdownDatabase()+0x45)[0x83f279]
(StorageDatabase::close()+0x2e)[0x811a14]
(StorageHandler::shutdownHandler()+0x4d)[0x814685]
(StorageInterface::panic(handlerton*, ha_panic_function)+0x16)[0x808ed2]
(ha_finalize_handlerton(st_plugin_int*)+0x6e)[0x741d62]
===

The test failures are only observed on Linux, but the assert is observed on Solaris, but
the test framework is not set up to detect errors there.

How to repeat:
>./mtr backup_tablespace backup_view_on_view

Tests can be found on mysql-6.0-backup branch.

Note that of the two tests only backup_tablespace acesses falcon tables.  Still, the other
test needs also to be run for the test failure to occur.

Thank you for the report.

Verified as described.

After I fixed bug#36795 (in backup tree), I got this error every time I ran the described
test case.  Note that you need the bug fix for bug#36795 in order to get this error. 
This bug fix has not yet been pushed to main 6.0 tree.

Duplicate of bug#33575.