nuitari-dovecot at nuitari.net
2008-Dec-12 08:07 UTC
[Dovecot] Problem with imap running at 100%
I was doing some checks on a server and found an imap process running at 100%, kill -9 was unable to kill it. hammer ~ # lsof -p 1918 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME imap 1918 vpopmail cwd DIR 8,2 96 539699 /var/vpopmail/domains/maxpersuasion.com/kec imap 1918 vpopmail rtd DIR 8,2 856 2 / imap 1918 vpopmail txt REG 8,2 851832 3646578 /usr/libexec/dovecot/imap imap 1918 vpopmail mem REG 8,2 1330888 2752698 /lib64/libc-2.8.so imap 1918 vpopmail mem REG 8,2 14520 2753738 /lib64/libdl-2.8.so imap 1918 vpopmail mem REG 8,2 114960 2753800 /lib64/ld-2.8.so imap 1918 vpopmail 2w FIFO 0,5 0t0 574015 pipe imap 1918 vpopmail 6u 0000 0,6 0 10 anon_inode strace & gdb can't seem to attach to the process. The process was started 2 days ago. It is dovecot 1.1.6
> an imap process running at 100%, kill -9 was unable to kill it.I'm no a Linux expert, but from a BSD perspective, that seems to contradict each other. Either the process is doing an uninterruptable sleep or consumes CPU time. As said, I'm not a Linux expert, but can you find out what state the process is in and, if waiting, what's the wait channel?
On Fri, 2008-12-12 at 03:07 -0500, nuitari-dovecot at nuitari.net wrote:> I was doing some checks on a server and found an imap process running at > 100%, kill -9 was unable to kill it.See the subject "unkillable imap process(es) with high CPU-usage" thread that's going on, with the exact same issue.. http://dovecot.org/list/dovecot/2008-December/035662.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 197 bytes Desc: This is a digitally signed message part URL: <http://dovecot.org/pipermail/dovecot/attachments/20081212/44cf298e/attachment-0002.bin>
On Dec 12, 2008, at 10:07 AM, nuitari-dovecot at nuitari.net wrote:> I was doing some checks on a server and found an imap process > running at 100%, kill -9 was unable to kill it.What OS/distribution and kernel version are you using? -------------- next part -------------- A non-text attachment was scrubbed... Name: PGP.sig Type: application/pgp-signature Size: 194 bytes Desc: This is a digitally signed message part URL: <http://dovecot.org/pipermail/dovecot/attachments/20081213/b1eaa410/attachment-0002.bin>
nuitari-dovecot at nuitari.net
2008-Dec-13 07:45 UTC
[Dovecot] Problem with imap running at 100%
>> I was doing some checks on a server and found an imap process running at >> 100%, kill -9 was unable to kill it. > > What OS/distribution and kernel version are you using?Gentoo with 2.6.27-gentoo-r5 amd64, 2 dual core opterons I think the user uses Outlook though, but I can check