Tomcat : Where to configure jmx JAVA_OPTS or CATALINA_OPTS

Question

I have Tomcat installed on ubuntu. I want to enable JMX for monitoring so in catalina.sh I modified JAVA_OPTS as:

JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.port=4998 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"

After restarting JMX is working but when I want to stop tomcat It gives error as:

Error: Exception thrown by the agent : java.rmi.server.ExportException : Port already in use: 5555;nested exception is: java.net.BindException: Address already in use:

After some Google search I come to know that we have write all JMX configurations to CATALINA_OPTS but after writing all configurations inside CATALINA_OPTS I am not able to connect.

score 2 · Answer 1 · edited Jun 22 '16 at 09:53

2

Create a file alongside catalina.sh called setenv.sh. That way all your changes are in a separate file.

Use CATALINA_OPTS rather than JAVA_OPTS since CATALINA_OPTS is only used on start whereas JAVA_OPTS is used on start and stop.

edited Jun 22 '16 at 09:53

Halfgaar

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answered Nov 03 '14 at 10:20

Mark Thomas

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Hey, How setenv.sh file get called? I mean where its written/configured to execute setenv.sh or we have write some for the same. Coz I have created the file as you said but nothing happens. – user1372488 Nov 03 '14 at 11:33
It is called from catalina.sh – Mark Thomas Nov 05 '14 at 14:08

score 1 · Answer 2 · answered Oct 31 '14 at 14:12

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If you have installed Tomcat from packages, you have to modify JAVA_OPTS in the file

/etc/default/tomcat...

answered Oct 31 '14 at 14:12

lazzio

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But if I modify JAVA_OPTS then while stopping tomcat service I got error like java.rmi.server.ExportException : Port already in use: – user1372488 Nov 03 '14 at 06:27
1

CATALINA_OPTS, not JAVA_OPTS – Mark Thomas Nov 05 '14 at 14:08
Yeas use the /etc/default/tomcat file and use CATALINA_OPTS. – DevOps Dec 18 '15 at 10:56
CATALINA_OPTS is for startup only but JAVA_OPTS is used for start AND stop – DevOps Dec 18 '15 at 10:57

score 0 · Answer 3 · edited Jun 22 '16 at 09:52

0

Do you have anything running on port 5555? You can try running

lsof -i :5555 or netstat -tulpn | grep :\5555

to see what's running on that port.

edited Jun 22 '16 at 09:52

Halfgaar

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answered Dec 18 '15 at 10:15

Mugurel

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score 0 · Answer 4 · edited Jun 22 '16 at 09:50

Hi to make the answer further clear, I am adding the below.

I created a file setenv.sh under $CATALINA_HOME/bin/. The file content is as below.

JAVA_OPTS="-Dcom.sun.management.jmxremote=true \
                   -Dcom.sun.management.jmxremote.ssl=false \
                   -Dcom.sun.management.jmxremote.authenticate=false \
                   -Djava.rmi.server.hostname=192.168.40.10"

There is no need of adding the file setenv.sh in catalina.sh since by seeing the file in name of setenv.sh tomcat will accept the parameters automatically. Then I added a line in bold font as below in catalina.sh.

if [ -r "$CATALINA_BASE/bin/setenv.sh" ]; then
  . "$CATALINA_BASE/bin/setenv.sh"
elif [ -r "$CATALINA_HOME/bin/setenv.sh" ]; then
  . "$CATALINA_HOME/bin/setenv.sh"
fi
***export CATALINA_OPTS="$CATALINA_OPTS -Dcom.sun.management.jmxremote.port=9090"***

This way we can avoid port conflict issue in Tomcat. Thanks.

Tomcat : Where to configure jmx JAVA_OPTS or CATALINA_OPTS

4 Answers4