Skip to main content

JBoss

Adding the boot environment​

This guide explains how to add required JVM options to effectively use the Java monitoring agent in the JBoss application server environment.

For JVM options, add options for -javaagent and -Djboss.modules.system.pkgs.

JBOSS 7.0 or later & EAP 6.0 or later​

Installation location: (JBoss installation path)/bin/standalone.conf(domain.conf)

#!/bin/sh
########## WHATAP ############
WHATAP_HOME=/home/ec2-user/whatap
WHATAP_JAR=`ls ${WHATAP_HOME}/whatap.agent-*.jar | sort -V | tail -1`
JAVA_OPTS="${JAVA_OPTS} -javaagent:${WHATAP_JAR} -Djboss.modules.system.pkgs=whatap"
########## WHATAP ############
Note

For JBoss 5.0 or earlier, set in the (JBoss installation path)/bin/run.conf path. If any error occurs, add the -Djboss.platform.mbeanserver=true option.

Java 17 or later​

In case of Java 17 or later, add the following options for reflection.


--add-opens=java.base/java.lang=ALL-UNNAMED

Viewing the heap histogram​

WhaTap's Java Monitoring provides the function to view the status of heap occupancy objects in the JVM memory (sizes for each object in heap memory). In APP > Instance performance analysis, select the Heap histogram tab.

Java versions 6 to 8 support basic functions without the JVM options. However, for some Java versions, the JVM options must be applied as follows:

  • Java 9 to Java 15

    -Djdk.attach.allowAttachSelf=true
    example
    java -javaagent:{WHATAP_HOME}/whatap.agent-X.Y.Z.jar -Djdk.attach.allowAttachSelf=true -jar {application.jar}

  • Java 16 or later

    -Djdk.attach.allowAttachSelf=true
    --add-opens=jdk.attach/sun.tools.attach=ALL-UNNAMED
    example
    java -javaagent:{WHATAP_HOME}/whatap.agent-X.Y.Z.jar -Djdk.attach.allowAttachSelf=true --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=jdk.attach/sun.tools.attach=ALL-UNNAMED -jar {application.jar}
Note

It does not support Java 5 or earlier and IBM Java.

Starting the monitoring​

Once the application server is restarted after configuring all settings, the agents start collecting data. See the following.