On 12/30/2010 11:31 AM, Clayton Keller wrote: > On 12/30/2010 11:07 AM, Mark Martinec wrote: >> Clay and Christian, >> >>> With some of my preliminary testing of -pre12 upon issuing the "amavisd >>> reload" command I see the old child processes lingering around in a >>> "<defunct>" state. >>> The amavisd-nanny process only shows the newly created children. >>> From a debug console everything appears to be functioning normally: >>> Subsequent reloads will generate another set of zombies. >> >> Thanks for the report. I haven't observed such behaviour so far >> (tried even on Linux), but it definitely needs investigating. >> >>> Could this be due in part to the new warm restart and how the parent is >>> handling the HUP handling the child processes? Just throwing that out as >>> an idea... >>> >>> Here is the output showing the state of the children after the reload >>> command and you can see older child processes still indicating a PPID of >>> the master: >> >> Looks like the HUPed master process after a rebirth (exec) fails to reclaim >> a process exit status of its previous set of child processes. Handling >> of child processes and reclaiming their exit status is entirely in hands >> of Net::Server, amavisd is not dealing with these by itself. >> >> Luckily these defunct processes no longer consume any resources >> on the host, except for a process slot - they no longer exist, it's only >> their exit status value that is still hanging around, waiting to be read >> by their parent process. If you do a full (cold) restart of amavisd >> eventually, all their zombies will be reclaimed by the init process. >> So yes, it is ugly, needs investigating, but is not burdening the >> host's memory or cpu resources. >> > > Agreed. > >> I can see the perl is 5.008008, but which version of Net::Server is that? >> And what OS? >> > > # cat /etc/redhat-release > CentOS release 5.5 (Final) > > Kernel: 2.6.18-194.26.1.el5 > > Net::Server package is an rpm provided by RPMFORGE: > perl-Net-Server-0.99-1.el5.rf.noarch > > As an added note I did not see the zombies in 2.5.4 or 2.6.4. > > Let me know if you need further testing or info. >
I'll try to get some debugging done to help out in my environment. We'll see what I can come up with. This weekend may not provide much time to gather data. Clay ------------------------------------------------------------------------------ Learn how Oracle Real Application Clusters (RAC) One Node allows customers to consolidate database storage, standardize their database environment, and, should the need arise, upgrade to a full multi-node Oracle RAC database without downtime or disruption http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ AMaViS-user mailing list AMaViS-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amavis-user Please visit http://www.ijs.si/software/amavisd/ regularly For administrativa requests please send email to rainer at openantivirus dot org
