Re: Zombie processes
sammy ominsky wrote: Hi all, I have one server that is constantly getting overrun by zombies! Nagios alerts me that ** NAGIOS ALERT ** PROBLEM with Zombie Processes on Hardware *** (***.***.***.***). Service is CRITICAL as of Sun Jan 3 15:17:10 UTC 2010. The additional information available is: PROCS CRITICAL: 23 processes with STATE = Z ps shows me it's mostly one process this time, other times it's others 19279 ?Z 0:00 [playrecording.p] defunct Use pstree and check who the zombies parent is. If it is the same process for almost all of them, this is likely a software bug in playrecording.p (or whatever the parent is). If it is process ID 1, then you have some other problem (probably in the kernel). Shachar -- Shachar Shemesh Lingnu Open Source Consulting Ltd. http://www.lingnu.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Zombie processes
look for open descriptors with lsof. 2010/1/3 Shachar Shemesh shac...@shemesh.biz: sammy ominsky wrote: Hi all, I have one server that is constantly getting overrun by zombies! Nagios alerts me that ** NAGIOS ALERT ** PROBLEM with Zombie Processes on Hardware *** (***.***.***.***). Service is CRITICAL as of Sun Jan 3 15:17:10 UTC 2010. The additional information available is: PROCS CRITICAL: 23 processes with STATE = Z ps shows me it's mostly one process this time, other times it's others 19279 ?Z 0:00 [playrecording.p] defunct Use pstree and check who the zombies parent is. If it is the same process for almost all of them, this is likely a software bug in playrecording.p (or whatever the parent is). If it is process ID 1, then you have some other problem (probably in the kernel). Shachar -- Shachar Shemesh Lingnu Open Source Consulting Ltd. http://www.lingnu.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Zombie processes
On 03/01/2010, at 18:22, Raz wrote: look for open descriptors with lsof. Thanks! I've pretty much got it pegged as a problem with playrecording.php, but I haven't found the reason yet. Going to assign it to one of my staff coders to investigate. The sysadmins were sadly clueless :) --sambo ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Zombie processes
sammy ominsky wrote: On 03/01/2010, at 18:22, Raz wrote: look for open descriptors with lsof. Thanks! I've pretty much got it pegged as a problem with playrecording.php, but I haven't found the reason yet. Going to assign it to one of my staff coders to investigate. The sysadmins were sadly clueless :) sys admins who are not programmers have a very small chance of analyzing such a problem - because this is a software (bug) problem, not a system administration problem. don't blame them for not being able to do something that is completely not within their profession. application programmers often do not understand these kind of bugs, because they are not systems programmers - they understand the application, but not the small intricacies of the unix programming model. you need a systems programmer to analyze such bugs. --guy ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
