1883089 - explorer displays HTTP 500 and java.lang.IllegalStateException

•  Upgrade from Business Intelligence Platform 4.0 SP4 FP7 to SP6,
• Cannot open explorer (http://<hostname>:<port>/explorer), errors are shown:
• HTTP Status 500 page
• org.apache.jasper.JasperException java.lang.IllegalStateException: No Java Compiler available
  
• In tomcat logs, getting the following error messages:
• Jun 28, 2013 12:23:08 AM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
  SEVERE: The web application [/explorer] created a ThreadLocal with key of type [org.aspectj.runtime.internal.cflowstack.ThreadStackFactoryImpl.ThreadCounterImpl] (value [org.aspectj.runtime.internal.cflowstack.ThreadStackFactoryImpl$ThreadCounterImpl@226e9d4c]) and a value of type [org.aspectj.runtime.internal.cflowstack.ThreadStackFactoryImpl.ThreadCounterImpl.Counter] (value [org.aspectj.runtime.internal.cflowstack.ThreadStackFactoryImpl$ThreadCounterImpl$Counter@ccac409]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
  Jun 28, 2013 12:23:09 AM org.apache.catalina.session.StandardManager stop
  SEVERE: Exception unloading sessions to persistent storage
  java.lang.IllegalStateException: BundleContext is no longer valid
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl.checkValid(BundleContextImpl.java:1000)
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl.getServiceReference(BundleContextImpl.java:601)
   at com.businessobjects.http.servlet.internal.servlet.ServletBridgeObjectStreamFactoryImpl.createOutputStream(ServletBridgeObjectStreamFactoryImpl.java:25)
   at com.businessobjects.servletbridge.session.BobjWebSessionMap.writeMap(BobjWebSessionMap.java:265)
   at com.businessobjects.servletbridge.session.BobjWebSessionMap.writeObject(BobjWebSessionMap.java:247)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:940)
   at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
   at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
   at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
   at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
   at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1585)
   at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1015)
   at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:528)
   at org.apache.catalina.session.StandardManager.unload(StandardManager.java:469)
   at org.apache.catalina.session.StandardManager.stop(StandardManager.java:678)
   at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4882)
   at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:936)
   at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:1359)
   at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:1330)
   at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:326)
   at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
   at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1098)
   at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1110)
   at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:468)
   at org.apache.catalina.core.StandardService.stop(StandardService.java:604)
   at org.apache.catalina.core.StandardServer.stop(StandardServer.java:788)
   at org.apache.catalina.startup.Catalina.stop(Catalina.java:662)
   at org.apache.catalina.startup.Catalina.start(Catalina.java:629)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
   at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

• SAP BusinessObjects Intelligence Platform 4.0 SP6 (upgraded from SP4 FP7)
• Tomcat Application Server
• Redhat Linux 5.7
• 5 Server cluster
• Server A & B: Tomcat servers with load balancer on top
• Server C & D: BI and Explorer servers
• Server E: Data Services and CMS database server

BI 4.0 explorer sp4 sp6 tomcat error exception web applications BOE , KBA , sp06 , sp04 , BI-BIP-DEP , Webapp Deployment, Networking, Vulnerabilities, Webservices , Problem