[Bug 1086775] Re: bind9 uses high CPU after lucid->precise upgrade

[Robie Basak]

Thanks for your insight Alex. I've managed to reproduce this now, with
the following steps:

On Lucid:
 1. sudo apt-get install bind9
 2. sudo apt-get remove bind9
 # this removes /var/cache/bind but leaves /etc/bind9/rndc.key
 3. sudo apt-get install bind9
 # Now the postinst doesn't fix /var/cache/bind, but on Lucid nobody will notice this problem
 4. sudo do-release-upgrade
 # bind now uses /var/cache/bind/managed-keys.bind and the problem occurs

After the upgrade to Precise, bind9 is in the situation you described
(permissions on /var/cache/bind wrong), with 100% CPU consumption.

I couldn't reproduce the problem directly on Precise because on package
removal /var/cache/bind/managed-keys.bind is left behind and so
/var/cache/bind never gets removed (I think this is a separate bug in
itself).

It seems likely to me that this issue will affect Debian also, so next I
will test this and file a bug report in Debian as needed, so that we can
coordinate a fix.

** Changed in: bind9 (Ubuntu)
       Status: Incomplete => Triaged

** Changed in: bind9 (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1086775

Title:
  bind9 uses high CPU after lucid->precise upgrade

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