Hi all,
I’m getting a strange error with persistent session storage when deployed on
Tomcat 8. I’m going for a website that can scale on ElasticBeanstalk. The setup
is Tomcat 8 with Apache connected via ProxyPass with rewrites being done (see
below). I tried to implement this a year or two ago but I ran into the same
problem as below.
What’s happening is that I will load a page once. After that any second attempt
to load a page will result in a null sessionID being passed to
ERPersistentSessionStore.restoreSessionWithID. This doesn’t happen with the
normal session store. The request cookies appear intact. Sessions are stored in
the cookies with a path of “/“; In my configuration pages use ERRest HTML
routing with IERXRouteComponent but I’ve also had this issue with normal pages.
er.extensions.ERXSession.useSecureSessionCookies=true
er.extensions.ERXSession.useHttpOnlySessionCookies=true
The above properties can also be set to false and the same error will occur. I
also get the same error when accessing via http or https.
Here is the exception I’m getting:
java.lang.IllegalArgumentException: Attempt to insert null object into an
com.webobjects.foundation.NSDictionary.
at com.webobjects.foundation.NSDictionary.<init>(NSDictionary.java:254)
at
com.webobjects.eoaccess.EOUtilities.objectsMatchingKeyAndValue(EOUtilities.java:189)
at
er.extensions.eof.EOEnterpriseObjectClazz.objectsMatchingKeyAndValue(EOEnterpriseObjectClazz.java:356)
at
er.extensions.eof.EOEnterpriseObjectClazz.objectMatchingKeyAndValue(EOEnterpriseObjectClazz.java:381)
at
er.persistentsessionstorage.ERPersistentSessionStore.restoreSessionWithID(ERPersistentSessionStore.java:37)
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:2379)
at
com.webobjects.jspservlet.WOServletContext.session(WOServletContext.java:107)
at com.webobjects.appserver.WOComponent.session(WOComponent.java:1324)
at com.appname.components.BaseComponent.session(Unknown Source)
at com.appname.components.PublicPageComponent.appendToResponse(Unknown
Source)
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
com.webobjects.appserver._private.WOActionRequestHandler._handleRequest(WOActionRequestHandler.java:278)
at
com.webobjects.appserver._private.WOActionRequestHandler.handleRequest(WOActionRequestHandler.java:161)
at
com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
at
er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:2092)
at
er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:2057)
at com.appname.Application.dispatchRequest(Unknown Source)
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:622)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at
org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:676)
at
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Apache Config
RewriteEngine On
# visually friendly rewrites
# no uri or query then enter the app
RewriteRule ^/$ /WebObjects/AppName.woa/ra/start [PT]
# anything with the app prefix is meant for WebObjects
RewriteCond %{REQUEST_URI} ^/app/.*$ [NC]
RewriteRule ^/app/(.+) /WebObjects/AppName.woa/$1 [NC,PT,QSA]
# anything else that is not static is meant to be passed to ERRest
RewriteCond %{REQUEST_URI} !^/app/.*$ [NC]
RewriteCond %{REQUEST_URI} !^/static/.*$ [NC]
RewriteCond %{REQUEST_URI} !^/WebObjects/.*$ [NC]
RewriteRule ^/(.+) /WebObjects/AppName.woa/ra/$1 [NC,PT,QSA]
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
ProxyPass / http://localhost:8080/ retry=0
ProxyPassReverse / http://localhost:8080/
ProxyPreserveHost on
Rewrite Properties
er.extensions.ERXApplication.replaceApplicationPath.pattern=/WebObjects/AppName.woa
er.extensions.ERXApplication.replaceApplicationPath.replace=/app
Any pointers would be appreciated if anyone has seen this issue before.
Thanks.
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