Hi,
I’m having a very weird error that I cannot pin down at all. The setup is an
app using ERPersistentSessionStorage deployed on Tomcat 7 (Elastic Beanstalk)
behind an SSL enabled load balancer. On one of the pages I get an NPE on page
load without fail. By process of elimination I’ve determined that the WOForm
embedded in the page is causing the NPE, but I have no idea why. If I remove
it, all works well. I can even leave all the content that was wrapped in the
form and the page will load without the form itself being there. Another page
has a WOForm in it without any issue. I’ve tried running the page statelessly
and statefully.
Entry to the page uses the following apache rewrite:
RewriteCond %{REQUEST_URI} ^/product [NC]
RewriteRule ^/product/([a-z-]+)/([a-z-]+)$
/WebObjects/CCILogisticsService.woa/wa/viewPage?pageName=Product&brandIdentifier=$1&productIdentifier=$2
[PT]
In my Application class my ‘shouldRestoreSessionOnCleanEntry' looks like this:
public boolean shouldRestoreSessionOnCleanEntry(WORequest request)
{
Boolean shouldRestore = Boolean.FALSE;
try
{
ERPersistentSessionStore sessionStore = (ERPersistentSessionStore)
this.sessionStore();
Session session = (Session)
sessionStore.restoreSessionWithID(request.sessionID(), request);
if (null != session) { shouldRestore = Boolean.TRUE; }
}
catch (Exception exception) { log.error("null values were passed in
during check for shouldRestoreSessionOnCleanEntry"); }
return shouldRestore.booleanValue();
}
I’m completely stuck on this one. I don’t even know where to look or what is
causing the issue. Any help would be appreciated. I’ve pasted in the NPE stack
trace below.
SEVERE: Servlet.service() for servlet [WOServletAdaptor] in context with path
[] threw exception
com.webobjects.foundation.NSForwardException
[java.lang.IllegalArgumentException] Attempt to insert null object into an
com.webobjects.foundation.NSDictionary.:<er.extensions.appserver.ERXDirectActionRequestHandler>:
Exception while trying to generate an error response:
java.lang.IllegalArgumentException: Attempt to insert null object into an
com.webobjects.foundation.NSDictionary.
at
com.webobjects.appserver._private.WOActionRequestHandler._handleRequest(WOActionRequestHandler.java:320)
at
com.webobjects.appserver._private.WOActionRequestHandler.handleRequest(WOActionRequestHandler.java:161)
at
er.extensions.appserver.ERXDirectActionRequestHandler.handleRequest(ERXDirectActionRequestHandler.java:128)
at
com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
at
er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:2127)
at
er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:2092)
at
com.webobjects.jspservlet._WOApplicationWrapper.servletDispatchRequest(_WOApplicationWrapper.java:131)
at
com.webobjects.jspservlet.WOServletAdaptor._handleRequest(WOServletAdaptor.java:727)
at
com.webobjects.jspservlet.WOServletAdaptor.doGet(WOServletAdaptor.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at
org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Attempt to insert null object
into an com.webobjects.foundation.NSDictionary.
at com.webobjects.foundation.NSDictionary.<init>(NSDictionary.java:197)
at
com.webobjects.eoaccess.EOUtilities.objectsMatchingKeyAndValue(EOUtilities.java:189)
at
er.extensions.eof.EOEnterpriseObjectClazz.objectsMatchingKeyAndValue(EOEnterpriseObjectClazz.java:350)
at
er.extensions.eof.EOEnterpriseObjectClazz.objectMatchingKeyAndValue(EOEnterpriseObjectClazz.java:375)
at
er.persistentsessionstorage.ERPersistentSessionStore.restoreSessionWithID(ERPersistentSessionStore.java:36)
at
com.webobjects.appserver.WOSessionStore.checkOutSessionWithID(WOSessionStore.java:182)
at
com.webobjects.appserver.WOApplication.restoreSessionWithID(WOApplication.java:1913)
at
er.extensions.appserver.ERXApplication.restoreSessionWithID(ERXApplication.java:2421)
at
com.webobjects.jspservlet.WOServletContext.session(WOServletContext.java:107)
at com.webobjects.appserver.WOComponent.session(WOComponent.java:1324)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
com.webobjects.foundation.NSKeyValueCoding$ValueAccessor$1.methodValue(NSKeyValueCoding.java:636)
at
com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
at
com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1324)
at
com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1736)
at
com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447)
at
com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:216)
at
com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1804)
at
com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50)
at
com.webobjects.appserver.WOComponent.pullValuesFromParent(WOComponent.java:524)
at
com.webobjects.appserver._private.WOComponentReference._pushComponentInContext(WOComponentReference.java:102)
at
com.webobjects.appserver._private.WOComponentReference.appendToResponse(WOComponentReference.java:134)
at
com.webobjects.appserver._private.WODynamicGroup.appendChildrenToResponse(WODynamicGroup.java:126)
at
com.webobjects.appserver._private.WODynamicGroup.appendToResponse(WODynamicGroup.java:136)
at
com.webobjects.appserver.WOComponent.appendToResponse(WOComponent.java:1122)
at
er.extensions.components.ERXComponent.appendToResponse(ERXComponent.java:195)
at
com.webobjects.appserver.WOComponent._appendPageToResponse(WOComponent.java:1574)
at
com.webobjects.appserver.WOComponent._generateResponseInContext(WOComponent.java:1543)
at
com.webobjects.appserver.WOComponent.generateResponse(WOComponent.java:1538)
at
co.coralstone.logistics.service.Application.handleException(Application.java:87)
at
com.webobjects.appserver._private.WODirectActionRequestHandler.generateErrorResponse(WODirectActionRequestHandler.java:126)
at
com.webobjects.appserver._private.WOActionRequestHandler._handleRequest(WOActionRequestHandler.java:318)
... 31 more
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