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Posted to users@spamassassin.apache.org by Justin Mason <jm...@jmason.org> on 2005/08/24 20:18:07 UTC

Re: More zombie problems

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Nels Lindquist writes:
> Hi there.
> 
> I'm testing SA 3.10RC1, and I'm running into problems with zombie 
> processes.  I'm using SA with MIMEDefang, which calls SpamAssassin 
> directly in perl.  When the MD multiplexor tries to shut down idle 
> slaves, they become zombies.  If I revert to SA 3.04, the problem 
> disappears entirely.  I read the "zombies" thread initiated by Jim 
> Knuth on August 18th, and tried applying the patch attached to
>  http://bugzilla.spamassassin.org/show_bug.cgi?idE18
> but it didn't make any difference.  Note that I'm using dccifd with a 
> socket rather dccproc, so my problem may be completely unrelated.
> 
> Any ideas on how I can further troubleshoot this?  I'm pursuing 
> parallel lines of inquiry on the MIMEDefang list too.

I'd suggest (a) opening a separate bug in the bugzilla and (b)
getting output from "strace -fo TRACE -p PID" of a process
turning into a zombie.

- --j.
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Re: More zombie problems

Posted by Nels Lindquist <nl...@maei.ca>.
On 25 Aug 2005 at 16:34, Nels Lindquist wrote:

> On 25 Aug 2005 at 15:13, Justin Mason wrote:
> 
> > try tracing the master spamd process using -f, so that it traces *both*
> > the parent and the child processes.
> 
> Since I'm using MIMEDefang which loads the SA libraries directly, I'm 
> not running spamd.  I'll see if tracing the multiplexor process shows 
> anything, though...

Okay, I've done that and I did get a lot more info out of strace.

See attached file.

----
Nels Lindquist <*>
Information Systems Manager
Morningstar Air Express Inc.


Re: More zombie problems

Posted by Nels Lindquist <nl...@maei.ca>.
On 25 Aug 2005 at 15:13, Justin Mason wrote:

> try tracing the master spamd process using -f, so that it traces *both*
> the parent and the child processes.

Since I'm using MIMEDefang which loads the SA libraries directly, I'm 
not running spamd.  I'll see if tracing the multiplexor process shows 
anything, though...

----
Nels Lindquist <*>
Information Systems Manager
Morningstar Air Express Inc.


Re: More zombie problems

Posted by Nels Lindquist <nl...@maei.ca>.
On 24 Aug 2005 at 11:18, Justin Mason wrote:

> Nels Lindquist writes:
>
> > Any ideas on how I can further troubleshoot this?  I'm pursuing 
> > parallel lines of inquiry on the MIMEDefang list too.
> 
> I'd suggest (a) opening a separate bug in the bugzilla and (b)
> getting output from "strace -fo TRACE -p PID" of a process
> turning into a zombie.

Sadly, I don't see much, since as soon as the process receives a TERM 
signal strace disconnects:

32358 read(0, "", 4096)                 = 0
32358 exit_group(0)                     = ?

----
Nels Lindquist <*>
Information Systems Manager
Morningstar Air Express Inc.