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  1. JBoss Web Server
  2. JWS-132

JON Tomcat: NullPointerException when Tomcat Web Application (WAR) config change

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    • Icon: Bug Bug
    • Resolution: Won't Do
    • Icon: Major Major
    • None
    • JWS 3.0.0 GA, JWS 3.0.2 CR2
    • JON plugin
    • None
    • Release Notes
    • Hide
      When monitoring JBoss Web Server using JBoss ON, a `NullPointerException` similar to below may be thrown when a Tomcat web application has its configuration changed.

      ----
      java.lang.NullPointerException
      at org.rhq.plugins.jmx.MBeanResourceComponent.updateResourceConfiguration(MBeanResourceComponent.java:532)
      at org.jboss.on.plugins.tomcat.TomcatWarComponent.updateResourceConfiguration(TomcatWarComponent.java:950)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocation.call(ResourceContainer.java:759)
      at java.util.concurrent.FutureTask.run(FutureTask.java:262)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:745)
      ----

      The cause of this issue is currently under investigation.
      Show
      When monitoring JBoss Web Server using JBoss ON, a `NullPointerException` similar to below may be thrown when a Tomcat web application has its configuration changed. ---- java.lang.NullPointerException at org.rhq.plugins.jmx.MBeanResourceComponent.updateResourceConfiguration(MBeanResourceComponent.java:532) at org.jboss.on.plugins.tomcat.TomcatWarComponent.updateResourceConfiguration(TomcatWarComponent.java:950) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocation.call(ResourceContainer.java:759) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) ---- The cause of this issue is currently under investigation.
    • Documented as Known Issue

      How to reproduce:
      1. Import a Tomcat7/8 Server from JON Discovery
      2. Deploy a Tomcat Web Application. Create child Tomcat Web Application (WAR) for a Tomcat Virtual Host.
      3. Change Current Configuration of WAR, e.g. Reloadable to Yes/No (depending on current value).

      The operation fails, which can be seen in WAR's Configuration History and the trace is follows:

      java.lang.NullPointerException
	at org.rhq.plugins.jmx.MBeanResourceComponent.updateResourceConfiguration(MBeanResourceComponent.java:532)
	at org.jboss.on.plugins.tomcat.TomcatWarComponent.updateResourceConfiguration(TomcatWarComponent.java:950)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocation.call(ResourceContainer.java:759)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

              rhn-engineering-jclere Jean-Frederic Clere
              fgoldefu@redhat.com Filip Goldefus (Inactive)
              Jan Onderka Jan Onderka
              Tyler Kelly Tyler Kelly (Inactive)
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                Created:
                Updated:
                Resolved: