Bug #40715 mtr fails when running the same test case in parallel threads

• Submitted: 13 Nov 2008 19:32
• Modified: 30 Jan 2009 17:52
• Reporter: Sven Sandberg
• Status: Closed
• Category: Tests
• Severity: S7 (Test Cases)
• Version: 5.1-rpl, 6.0-rpl
• OS: Any
• Assigned to: Magnus Blåudd
• CPU Architecture: Any
• Tags: mtr

[13 Nov 2008 19:32] Sven Sandberg

Description:
When running './mtr --parallel=2 rpl_alter_db rpl_alter_db', mtr fails with the error message:

mysql-test-run: *** ERROR: ' rpl.rpl_alter_db ' is not known to be running

This is repeatable for any test, not just rpl_alter_db. Seems that mtr does not handle the case when the same test case and same combination is run in two parallel threads.

Moreover, if you run with --verbose, it looks as if the main thread loses the auxiliary thread, and stops before the auxiliary thread has stopped: the main thread exits and you return to the shell prompt, but after a few seconds the auxiliary thread prints a lot of text to stdout again.

How to repeat:
$ ./mtr --force rpl_alter_db rpl_alter_db
Logging: ./mtr  --force rpl_alter_db rpl_alter_db
MySQL Version 6.0.9
Checking supported features...
 - using ndbcluster when necessary, mysqld supports it
 - SSL connections supported
 - binaries are debug compiled
Collecting tests...
 - adding combinations for rpl
vardir: /home/sven/bzr/b38350-test_cleanup/6.0-rpl/mysql-test/var
Checking leftover processes...
Removing old var directory...
Creating var directory '/home/sven/bzr/b38350-test_cleanup/6.0-rpl/mysql-test/var'...
Installing system database...
Using parallel: 2
Using server port 37964
worker[1] Using MTR_BUILD_THREAD 11, with reserved ports 10110..10119
Removing slot 250 used by missing process 3217
worker[2] Using MTR_BUILD_THREAD 250, with reserved ports 12500..12509

============================================================

TEST                                      RESULT   TIME (ms)
------------------------------------------------------------

rpl.rpl_alter_db 'row'                   [ pass ]    128
rpl.rpl_alter_db 'row'                   [ pass ]    236
mysql-test-run: *** ERROR: ' rpl.rpl_alter_db ' is not known to be running

[14 Nov 2008 10:49] Bugs System

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/58757

2694 Magnus Svensson	2008-11-14
      Bug#40715 mtr fails when running the same test case in parallel threads

[30 Jan 2009 13:26] Bugs System

Pushed into 6.0.10-alpha (revid:[e-mail]-20090129165607-wiskabxm948yx463) (version source revid:[e-mail]-20090129163120-e2ntks4wgpqde6zt) (merge vers: 6.0.10-alpha) (pib:6)

[30 Jan 2009 15:07] Bugs System

Pushed into 5.1.32 (revid:[e-mail]-20090129165946-d6jnnfqfokuzr09y) (version source revid:[e-mail]-20081114104912-kbcj7q37dyty00sy) (merge vers: 5.1.31) (pib:6)

[30 Jan 2009 17:52] Paul DuBois

Test suite changes. No changelog entry needed.

[17 Feb 2009 14:52] Bugs System

Pushed into 5.1.32-ndb-6.3.23 (revid:[e-mail]-20090217131017-6u8qz1edkjfiobef) (version source revid:[e-mail]-20090203133556-9rclp06ol19bmzs4) (merge vers: 5.1.32-ndb-6.3.22) (pib:6)

[17 Feb 2009 16:40] Bugs System

Pushed into 5.1.32-ndb-6.4.3 (revid:[e-mail]-20090217134419-5ha6xg4dpedrbmau) (version source revid:[e-mail]-20090203133556-9rclp06ol19bmzs4) (merge vers: 5.1.32-ndb-6.3.22) (pib:6)

[17 Feb 2009 18:16] Bugs System

Pushed into 5.1.32-ndb-6.2.17 (revid:[e-mail]-20090217134216-5699eq74ws4oxa0j) (version source revid:[e-mail]-20090201210519-vehobc4sy3g9s38e) (merge vers: 5.1.32-ndb-6.2.17) (pib:6)