[debian-mysql] Bug#698431: /usr/sbin/mysqld: replication freezes on INSERT IGNORE statement since upgrade from 5.1.63 to 5.1.66 on a squeeze

Patrick MARMAYOU patrick.marmayou at smile.fr
Fri Jan 18 13:25:01 UTC 2013

Package: mysql-server-core-5.1
Version: 5.1.66-0+squeeze1
File: /usr/sbin/mysqld
Severity: important

*** Please type your report below this line ***

Since last upgrade from 5.1.63 to 5.1.66, after a while, replication on 
the slave begins drifting relative to the master position.

A "show processlist" indicates that slave is stuck on an "INSERT IGNORE" 
statement. And from that point, replication is frozen and "seconds 
behind master" starts to increase more and more.

Here is the output from a "show processlist" on the slave :
*************************** 1. row ***************************
      Id: 1
    User: system user
      db: NULL
Command: Connect
    Time: 60497
   State: Waiting for master to send event
    Info: NULL
*************************** 2. row ***************************
      Id: 2
    User: system user
      db: referential
Command: Connect
    Time: 36978
   State: Sending data
    Info: INSERT IGNORE INTO symfony.ebook_author (ebook_id,author_id)
     SELECT ec.ebook_id as ebook_id, a
*************************** 3. row ***************************
      Id: 1536
    User: debian-sys-maint
    Host: localhost
      db: NULL
Command: Query
    Time: 0
   State: NULL
    Info: show processlist

And at the same time, "Seconds_Behind_Master" is 36968.

I tried a rollback to 5.1.63 for the following packages :

Replication then just works fine, for as long as I let it run (almost 3 
days). Seconds behind master remained all that time 0s.

If I upgrade slave again to last version 5.1.66, even with replication 
restarted from scratch on the slave, bug is reproduced (the output 
pasted above is from this second try)

Master version is 5.1.66 too.

To reproduce, i guess you can configure a master/slave replication with 
5.1.66 on Debian Squeeze servers and try to execute an INSERT IGNORE on 
the master which should then freeze replication process on the slave.

-- System Information:
Debian Release: 6.0.6
   APT prefers stable-updates
   APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/24 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages mysql-server-core-5.1 depends on:
ii  libc6                   2.11.3-4         Embedded GNU C Library: 
Shared lib
ii  libgcc1                 1:4.4.5-8        GCC support library
ii  libstdc++6              4.4.5-8          The GNU Standard C++ Library v3
ii  libwrap0                7.6.q-19         Wietse Venema's TCP 
wrappers libra
ii  zlib1g                  1: compression library - runtime

mysql-server-core-5.1 recommends no packages.

mysql-server-core-5.1 suggests no packages.

-- no debconf information

More information about the pkg-mysql-maint mailing list