This is an old version. If you want this to work with nrpe, you must have the following: {noformat}

#!/bin/sh
#
# Nagios JMX plugin.
#

JAVA_CMD=`which java`

if [ -z $JAVA_CMD ]
then

if [ -x $JAVA_HOME/bin/java ]
then
JAVA_CMD=$JAVA_HOME/bin/java
else
echo JMX CRITICAL - java not found.
exit 2
fi

fi

DIR=`dirname $0`
$JAVA_CMD -jar $DIR/check_jmx.jar "$@"
{noformat}
as your check_jmx. Otherwise nrpe will not be able to find java.

The problem is most likely permissions. To check what was going on, I executed the script as the nagios user on the remote
machine:

bash /usr/lib/nagios/plugins/contrib/check_jmx -U service:jmx:rmi:///jndi/rmi://localhost:8997/jmxrmi -O java.lang:type=Memory -A HeapMemoryUsage -K used -I HeapMemoryUsage -J used -vvvv -w 10000000 -c 100000000
/usr/lib/nagios/plugins/contrib
Exception in thread "main" java.lang.NoClassDefFoundError: org/nagios/JMXQuery
Caused by: java.lang.ClassNotFoundException: org.nagios.JMXQuery
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)

Was the output. the issue was the permissions of the jmxquery.jar file:

root@dvl_app-1:/usr/lib/nagios/plugins/contrib# ls -al
total 56
drwxrwxr-x 2 root root 4096 2011-09-19 10:47 .
drwxrwxr-x 3 root root 4096 2011-09-16 17:04 ..
-r-xr-xr-x 1 root root 28423 2011-09-16 17:04 check_diskio
-rwxr-xr-x 1 nagios nagios 177 2011-09-19 10:52 check_jmx
-rwx------ 1 root root 13225 2011-09-19 09:55 jmxquery.jar

Was what I had. To fix I ran:
chown nagios.nagios /usr/lib/nagios/plugins/contrib/jmxquery.jar

and from my nagios monitoring machine I ran:

/usr/local/nagios/libexec/check_nrpe -H 184.73.5.19 -c check_jmx
JMX CRITICAL HeapMemoryUsage.used=233372176{committed=266797056;init=0;max=266797056;used=233372176}

The current check_jmx shell script won't return information to the performance gathering subsystem in Nagios. Add-ons like PNP4nagios aren't able to pick up the returned values without the proper output.

I offer this little hack...


RDIR=`dirname $0`
OUTPUT=`java -cp $RDIR/jmxquery.jar org.nagios.JMXQuery $@`
EXIT_STATUS=$?
STATUS=`echo $OUTPUT`
VALUE=`echo $OUTPUT | awk '{print $NF}'`
echo "$STATUS | $VALUE"

exit $EXIT_STATUS

I'm working on using check_jmx over NRPE. I'm sure the issue has something to do with the limits on data passed between check_nrpe and the remote nrpe daemon. I use NRPE with the perl-based check_multi plug-in and have to increase the data buffer sizes in the C code itself. I'll write again if I have success in getting check_jmx working with NRPE...

Looks like a good start, but it is missing some informations. There is no way I can make it work with NRPE, even if I run it ok directly in my shell account :

[nagios@myserver ~]$ /usr/local/nagios/libexec/check_jmx -U service:jmx:rmi:///jndi/rmi://localhost:8999/jmxrmi -O java.lang:type=Memory -A HeapMemoryUsage -K used -I HeapMemoryUsage -J used -vvvv -w 800000000 -c 1500000000
JMX WARNING HeapMemoryUsage.used=842512960{committed=1042808832;init=1073741824;max=1042808832;used=842512960}


I checked a lot of things, but I am still stuck with the following message :

[nagios@myserver ~]$ /usr/local/nagios/libexec/check_nrpe -H localhost -c check_jmx
NRPE: Unable to read output