Bug #40875 Memory leak in FEDERATED handler

• Submitted: 20 Nov 2008 7:10
• Modified: 3 Dec 2008 2:52
• Reporter: Ramil Kalimullin
• Status: Closed
• Category: MySQL Server: Federated storage engine
• Severity: S2 (Serious)
• Version: 5.0
• OS: Any
• Assigned to: Ramil Kalimullin
• CPU Architecture: Any

[20 Nov 2008 7:10] Ramil Kalimullin

Description:
Additional federated test ( http://lists.mysql.com/commits/58720 ) has triggered a memory leak in the federated handler, see:

https://intranet.mysql.com/secure/pushbuild/getlog.pl?dir=bzr_mysql-5.0-bugteam&entry=Rami...

The problem is only in 5.0 as the code was changed significantly in 5.1+.

How to repeat:
BUILD/compile-pentium-valgrind-max
cd mysql-test
./mtr --valgrind --force --do-test=federated
less var/log/master.err

[20 Nov 2008 10:10] 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/59337

2719 Ramil Kalimullin	2008-11-20
      Fix for bug#40875: Memory leak in FEDERATED handler
      
      Problem: memory leak occurs when we open a federated table
      that has its share in the hash.
      
      Fix: free not used memory.
      
      Note: the fix should NOT be merged to 5.1 (the code changed).

[2 Dec 2008 13:02] Bugs System

Pushed into 5.0.74  (revid:[e-mail]-20081120100836-gct60cm67b1rui29) (version source revid:[e-mail]-20081120100836-gct60cm67b1rui29) (pib:5)

[3 Dec 2008 2:52] Paul DuBois

Noted in 5.0.74 changelog.

The FEDERATED handler had a memory leak.

[8 Dec 2008 10:23] Bugs System

Pushed into 5.1.31  (revid:[e-mail]-20081120100836-gct60cm67b1rui29) (version source revid:[e-mail]-20081126180318-v685u61mpgoc176x) (pib:5)

[8 Dec 2008 11:34] Bugs System

Pushed into 6.0.9-alpha  (revid:[e-mail]-20081120100836-gct60cm67b1rui29) (version source revid:[e-mail]-20081121151447-dtf2ofz2ys0zqed1) (pib:5)

[19 Jan 2009 11:25] Bugs System

Pushed into 5.1.31-ndb-6.2.17 (revid:[e-mail]-20090119095303-uwwvxiibtr38djii) (version source revid:[e-mail]-20090108105244-8opp3i85jw0uj5ib) (merge vers: 5.1.31-ndb-6.2.17) (pib:6)

[19 Jan 2009 13:03] Bugs System

Pushed into 5.1.31-ndb-6.3.21 (revid:[e-mail]-20090119104956-guxz190n2kh31fxl) (version source revid:[e-mail]-20090119104956-guxz190n2kh31fxl) (merge vers: 5.1.31-ndb-6.3.21) (pib:6)

[19 Jan 2009 16:09] Bugs System

Pushed into 5.1.31-ndb-6.4.1 (revid:[e-mail]-20090119144033-4aylstx5czzz88i5) (version source revid:[e-mail]-20090119144033-4aylstx5czzz88i5) (merge vers: 5.1.31-ndb-6.4.1) (pib:6)