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тАО05-07-2008 03:18 PM
тАО05-07-2008 03:18 PM
server hung
Hi All,
Need help in listing out the steps one would take to resolve a server hung issue. Being an admin what are all the steps you should check to identify the issue?
can someone list out the steps?
Need help in listing out the steps one would take to resolve a server hung issue. Being an admin what are all the steps you should check to identify the issue?
can someone list out the steps?
3 REPLIES 3
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тАО05-10-2008 11:47 AM
тАО05-10-2008 11:47 AM
Re: server hung
Sac,
To get you started in the right direction google the following -- sysrq, netdump, diskdump
you will find lots of complete HOWTO set these up and use them in various places, i.e. Red Hat has this doc for sysrq -- http://kbase.redhat.com/faq/FAQ_80_5559.shtm, netdump -- http://kbase.redhat.com/faq/FAQ_43_2467.shtm and http://kbase.redhat.com/faq/FAQ_43_4220.shtm, etc.
Also each one of these once installed on a Linux system will put some good documentation files (txt, README, etc.)
HTH,
Ross
To get you started in the right direction google the following -- sysrq, netdump, diskdump
you will find lots of complete HOWTO set these up and use them in various places, i.e. Red Hat has this doc for sysrq -- http://kbase.redhat.com/faq/FAQ_80_5559.shtm, netdump -- http://kbase.redhat.com/faq/FAQ_43_2467.shtm and http://kbase.redhat.com/faq/FAQ_43_4220.shtm, etc.
Also each one of these once installed on a Linux system will put some good documentation files (txt, README, etc.)
HTH,
Ross
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тАО05-10-2008 04:08 PM
тАО05-10-2008 04:08 PM
Re: server hung
can you access it at all?
Such as from a console?
If you can gain access via a console, then it is a matter of hung processes, such as SSHD, or other remote access process.
If you can get access from the console check to see if you have a NFS or CIFS mount point not responding.
I recently dealt an issue where CIFS mounts were failing on a particular flavor of Fedora, I had to YUM update fedora to overcome the issue.
Such as from a console?
If you can gain access via a console, then it is a matter of hung processes, such as SSHD, or other remote access process.
If you can get access from the console check to see if you have a NFS or CIFS mount point not responding.
I recently dealt an issue where CIFS mounts were failing on a particular flavor of Fedora, I had to YUM update fedora to overcome the issue.
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тАО05-11-2008 05:02 AM
тАО05-11-2008 05:02 AM
Re: server hung
I recall looking into dump docs for Linux time ago,even putting netdump server to collect dumps (which were partial for some reason). Anyway,/var/log/messages (console / dmesg alternatively) is a first place to start and look for oops strings ,EIP etc.
Try this link if you indeed face oops:
http://kerneltrap.org/node/3648
Now,oops are a kernel panic not hardware failures which are discovered in various and not allways user friendly ways in Linux.
Try this link if you indeed face oops:
http://kerneltrap.org/node/3648
Now,oops are a kernel panic not hardware failures which are discovered in various and not allways user friendly ways in Linux.
So computers don't think yet. At least not chess computers. - Seymour Cray
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