JMX checks return NULL values

clive.dias · Post by **clive.dias** » Fri Feb 14, 2014 5:05 am

HI TEAM ,

This is in continuation to the previously mentioned issue below , that we have been still receiving lots of JMX alerts daily that return null value .

http://support.nagios.com/forum/viewtop ... 20&t=22263

The thing is that we are configuring Nagios Xi on a new server B and are making use of the existing configuration files of server A.

While Server A is a Solaris machine, Server B is a Linux One.

And also when we receive these alerts from Server B , we do not receive similar alerts from Server A at the same time.

The wrapper version of JMX is the same on both Solaris and Linux servers

Hosta A :

(PROD)emarkets@ap-em5p-a:/me01/apps/emarkets/nagiosjmxdaemon-1.0.2/bin$ ./wrapper -v
Wrapper (Version 3.2.1) http://wrapper.tanukisoftware.org

INFO | jvm 1 | 2014/02/14 10:36:26 | java version "1.5.0_22"

Host B :

(PROD XI)root@dkd1mr7954:/me01/apps/emarkets/nagiosjmxdaemon-1.0.2/bin# ./wrapper -v
Wrapper (Version 3.2.1) http://wrapper.tanukisoftware.org

INFO | jvm 1 | 2014/02/14 10:36:26 | java version "1.5.0_22"

Please let us know if you need any details on configuration or JMX application logs to debug further
Thanks
Clive

abrist · Post by **abrist** » Fri Feb 14, 2014 11:25 am

Are the issues intermittent, or are the failing checks consistently failing? Can you post one of the commands that is failing?

clive.dias · Post by **clive.dias** » Mon Feb 17, 2014 2:48 am

Well this happens consistently once every week ?
We were wondering if it is impcated because of some issues related to load and if some Java app could be attacting more load ?

abrist · Post by **abrist** » Mon Feb 17, 2014 2:21 pm

Are you recording performance checks on this remote host? Can you check if there was a load spike around the time that the jmx checks fail? Additionally, do the jmx services restart at all during the week?

clive.dias · Post by **clive.dias** » Mon Feb 17, 2014 11:29 pm

Looks like some of the JMX based commands that are supposed to provide passive results did not have the "check_command" option defined when we were revieing the services concerned.

Now we have select the appropritae command and "active" option is being checked .

Hope that works

abrist · Post by **abrist** » Tue Feb 18, 2014 10:23 am

ok. Let us know if you have further issues.

clive.dias · Post by **clive.dias** » Fri Feb 21, 2014 4:29 am

For now we have been restarted JMX demon every 5 minutes as we have seen that restarting JMX after we have received these bulk messages with null values returned has helped.

abrist · Post by **abrist** » Fri Feb 21, 2014 1:28 pm

hmmm, that does not sound like a good solution. Any hints from the jmx server logs?

clive.dias · Post by **clive.dias** » Tue Feb 25, 2014 3:03 am

Fixing the "check_command" has not helped entirely as it seems.

Can you suggest anything else that I could be missing ?

slansing · Post by **slansing** » Tue Feb 25, 2014 1:53 pm

Do you see anything having to do with the queries you are running against JMX from it's logs?

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