[Xymon] df hanging will cause xymon-client to hang.

[Steve Anderson]

If you don't care about the nfs mounted volumes, you may get away with replacing the df with something like

df -l
or
df -x nfs

Those /should/ (depending on implementation) just skip the testing of the nfs volumes.

timeout 5s df

is another option, which should kill the df if it takes more than 5 seconds.


Steve


-----Original Message-----
From: Xymon [mailto:xymon-bounces at xymon.com] On Behalf Of Novosielski, Ryan
Sent: 18 June 2015 14:16
To: Cédric BRINER; xymon at xymon.com
Subject: Re: [Xymon] df hanging will cause xymon-client to hang.

You do eventually find out when the status turns purple.

This is a pretty hard one to deal with, from my experience. A hang on something NFS-related is pretty difficult to get out of. I've seen that mounting NFS with the "bg" option can improve this somewhat, but that might create other problems.

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________________________________________
From: Xymon [xymon-bounces at xymon.com] On Behalf Of Cédric BRINER [Cedric.BRINER at UniGE.ch]
Sent: Thursday, June 18, 2015 9:11 AM
To: xymon at xymon.com
Subject: [Xymon] df hanging will cause xymon-client to hang.

Hello,

I'm running a xymon-client on a Debian Jessie.

OS: Debian
OS-Release: 8 (Jessie)
xymon-client version : 4.3.17

The error happend due to a nfs ressource not responding. I suppose that
as xymon launch "df" to get information and as the nfs was hanging, the
xymon-client is no able to detect that the df hangs and it does not send
any data to the server. Worst, the xymon-client is not verbose at all,
it does not tell this test (df) takes too long to accomplish.

Many thanks for xymon.

Regards.

Cédric BRINER
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