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Re: monit deadlocks

From: Jan-Henrik Haukeland
Subject: Re: monit deadlocks
Date: Wed, 19 Oct 2005 22:30:20 +0200

Which version of monit are you using? Earlier 4.x version (or was it 3.x?) had some problems with thread locking in some special cases. If you are not using the latest 4.6 release try to upgrade to this version and see if that solve the problem. If not, could you please provide us with a longer trace (the stack address is not much help) and maybe elaborate more around the problem (log output) and provide us with your monitrc file.


On 19. okt. 2005, at 20.00, Eli Yukelzon wrote:

Good day.

I've been using monit for administating my server for quite a while,
and i've been very pleased with it's performance.
Lately though I've came across a reoccuring event which will probably
cause me to switch away from using monit...
Monit daemon get's stuck. It enters some deadlock, according to strace:

# strace -f -F -p 21284
Process 21284 attached - interrupt to quit
futex(0xb7e42800, FUTEX_WAIT, 2, NULL <unfinished ...>
Process 21284 detached
# monit summary
monit: cannot read status from the monit daemon

after killall -9 monit
it restarts from inittab just fine.
the problem is - becuase of this deadlock, it stops monitoring the services!

Any ideas?


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