[jboss-user] [JBoss Seam] - Re: @Log and NullPointerException

bsmithjj do-not-reply at jboss.com
Wed Nov 15 11:05:05 EST 2006


I haven't been able to try a CVS build since your post asking me to try it but I wanted to provide some more data around the problem.

- first adding a no-arg constructor to LogImpl didn't help (but again, I haven't tried the request CVS stuff yet)

- second, let me explain the execution context a bit.

   I have an .ear application - the EJB's reside in their own jar, the webapp resides in a .war.  The class that is experiencing the exception from LogImpl has an @Observer method for an event generated by a SFSB in the EJB jar.  - NOTE - the class that has the @Observer method is bundled in the .war.  It seems that in all our other uses of @Logger in the EJB's, there are no such issues.  It's this one class in the war that has the problems.

Another aspect of the problem is when I remove the @Logger and convert over to a typical commons-logging Log - LogFactory impl in the observer class, I get a different type of exception


  | javax.faces.FacesException: java.io.NotSerializableException: org.apache.log4j.Level
  |         at org.apache.myfaces.shared_impl.util.StateUtils.getAsByteArray(StateUtils.java:190)
  |         at org.apache.myfaces.shared_impl.util.StateUtils.construct(StateUtils.java:150)
  |         at org.apache.myfaces.renderkit.html.HtmlResponseStateManager.writeState(HtmlResponseStateManager.java:102)
  |         at org.apache.myfaces.application.jsp.JspStateManagerImpl.writeState(JspStateManagerImpl.java:430)
  |         at org.jboss.seam.jsf.SeamStateManager.writeState(SeamStateManager.java:66)
  |         at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:606)
  |         at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
  |         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:97)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at com.evergreen.filter.RequestDumper.doFilter(RequestDumper.java:78)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:46)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:32)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
  |         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
  |         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
  |         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
  |         at com.evergreen.fastpass.catalina.CASSSOAuthenticatorValve.invoke(CASSSOAuthenticatorValve.java:371)
  |         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
  |         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  |         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
  |         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
  |         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
  |         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
  |         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
  |         at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
  |         at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
  |         at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
  |         at java.lang.Thread.run(Thread.java:595)
  | Caused by: java.io.NotSerializableException: org.apache.log4j.Level
  |         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
  |         at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
  |         at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
  |         at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
  |         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
  |         at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
  |         at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
  |         at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
  |         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
  |         at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
  |         at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
  |         at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
  |         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
  |         at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1369)
  |         at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1341)
  |         at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
  |         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
  |         at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
  |         at java.util.HashMap.writeObject(HashMap.java:985)
  |         at sun.reflect.GeneratedMethodAccessor67.invoke(Unknown Source)
  |         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
  |         at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
  |         at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
  |         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
  |         at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
  |         at java.util.HashMap.writeObject(HashMap.java:985)
  |         at sun.reflect.GeneratedMethodAccessor67.invoke(Unknown Source)
  |         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:890)
  |         at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1333)
  |         at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1284)
  |         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1073)
  |         at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1245)
  |         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1069)
  | 
  | 

The idea behind the class in the war is that it maintains a collection of 'applications' (application is an entity in our domain).  The event-generating SFSB sends out an event whenever an applications editted, added, activated, deactivated, and we need to update the collection in response to such an event.  The SFSB is a DAO of sorts for application and collections of applications.  The .war class that maintains a collection has no logic for querying the applications - rather, it delegates the loading to the SFSB.



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