Bug #41296 Leaked and/or incorrectly handled commit-ack-marker
Submitted: 8 Dec 2008 11:08 Modified: 10 Dec 2008 23:29
Reporter: Jonas Oreland Email Updates:
Status: Closed Impact on me:
Category:MySQL Cluster: Cluster (NDB) storage engine Severity:S3 (Non-critical)
Version:* OS:Any
Assigned to: Jonas Oreland CPU Architecture:Any

[8 Dec 2008 11:08] Jonas Oreland
during code-review was one abort path in DBLQH discovered that did not release
a commit-ack-marker.

furthermore, it was also discovered that during node-failure-handling
the LQH's could be added several times to the marker-record
which could lead to node-failure when the array overflowed.

How to repeat:
new testprg (for bug#41295)
[8 Dec 2008 12:35] 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:


2764 Jonas Oreland	2008-12-08
      ndb - bug#41295 bug#41296 bug#41297
[8 Dec 2008 14:00] Bugs System
Pushed into 5.1.30-ndb-6.2.17  (revid:jonas@mysql.com-20081208123555-23afeiagk2vputc1) (version source revid:jonas@mysql.com-20081208123555-23afeiagk2vputc1) (pib:5)
[8 Dec 2008 14:01] Bugs System
Pushed into 5.1.30-ndb-6.3.20  (revid:jonas@mysql.com-20081208123555-23afeiagk2vputc1) (version source revid:jonas@mysql.com-20081208133911-5ef2zriejdniqgkd) (pib:5)
[8 Dec 2008 14:02] Bugs System
Pushed into 5.1.30-ndb-6.4.0  (revid:jonas@mysql.com-20081208123555-23afeiagk2vputc1) (version source revid:jonas@mysql.com-20081208135815-5pzw01ax9hrbbw3j) (pib:5)
[8 Dec 2008 14:13] Jonas Oreland
note: 6.3.20 *might* be incorrect, check with tomas
[10 Dec 2008 23:29] Jon Stephens
Documented bugfix in the NDB-6.2.17 and NDB-6.3.21 changelogs as follows:

        An abort path in the DBLQH kernel block failed to release a
        commit acknowledgement marker. This meant that, during node
        failure handling, the local query handler could be added
        multiple times to the marker record which could lead to
        additional node failures due an array overflow.

(Fix appears in 6.3.21 rather than 6.3.20 per email from Jörg.)
[12 Dec 2008 23:28] Bugs System
Pushed into 6.0.9-alpha  (revid:jonas@mysql.com-20081208123555-23afeiagk2vputc1) (version source revid:tomas.ulin@sun.com-20081209185954-9svcixh2p5hsfi6w) (pib:5)