Bug #40875 Memory leak in FEDERATED handler
Submitted: 20 Nov 2008 7:10 Modified: 3 Dec 2008 2:52
Reporter: Ramil Kalimullin Email Updates:
Status: Closed Impact on me:
Category:MySQL Server: Federated storage engine Severity:S2 (Serious)
Version:5.0 OS:Any
Assigned to: Ramil Kalimullin CPU Architecture:Any
Triage: Triaged: D1 (Critical)

[20 Nov 2008 7:10] Ramil Kalimullin
Additional federated test ( http://lists.mysql.com/commits/58720 ) has triggered a memory leak in the federated handler, see:


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

How to repeat:
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:


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:ramil@mysql.com-20081120100836-gct60cm67b1rui29) (version source revid:ramil@mysql.com-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:ramil@mysql.com-20081120100836-gct60cm67b1rui29) (version source revid:patrick.crews@sun.com-20081126180318-v685u61mpgoc176x) (pib:5)
[8 Dec 2008 11:34] Bugs System
Pushed into 6.0.9-alpha  (revid:ramil@mysql.com-20081120100836-gct60cm67b1rui29) (version source revid:ingo.struewing@sun.com-20081121151447-dtf2ofz2ys0zqed1) (pib:5)
[19 Jan 2009 11:25] Bugs System
Pushed into 5.1.31-ndb-6.2.17 (revid:tomas.ulin@sun.com-20090119095303-uwwvxiibtr38djii) (version source revid:tomas.ulin@sun.com-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:tomas.ulin@sun.com-20090119104956-guxz190n2kh31fxl) (version source revid:tomas.ulin@sun.com-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:tomas.ulin@sun.com-20090119144033-4aylstx5czzz88i5) (version source revid:tomas.ulin@sun.com-20090119144033-4aylstx5czzz88i5) (merge vers: 5.1.31-ndb-6.4.1) (pib:6)