[JBossCache] - Re: TreeCache/Hibernate/JBossAS optimistic locking problem
by floefliep
Well, no luck. I replaced OptimisticTreeCache with the latest version from CVS, which, as I understood from reading HHH-1796 at least, should fix the problem using a new Fqn.
I've been debugging and browsing code for hours now trying to figure out what is going on and I think problem is twofold, and both are related. It seems at some point instances of org.jboss.cache.optimistic.WorkspaceNodeImpl, which by default appear to have their version set to DefaultDataVersion.ZERO, are altered via a call setVersion() with null as an argument.
1/ Now the first part of the problem seems exactly what you mention, i.e. "no way Hibernate would apply a DataVersion to a query cache thus we set null".
But looking at these lines from
org.jboss.cache.interceptors.OptimisticCreateIfNotExistsInterceptor.createNode():
DataVersion version = null;
| if (ctx.getOptionOverrides() != null && ctx.getOptionOverrides().getDataVersion() != null)
| {
| version = ctx.getOptionOverrides().getDataVersion();
| workspace.setVersioningImplicit( false );
| }
it seems the transaction workspace's versioning mode is set to explicit versioning when we pass in an Option which sets a DataVersion, for example when calling OptimisticTreeCache.writeLoad(). But then, somewhat further in the same method, we have:
if (!workspace.isVersioningImplicit()) childWorkspaceNode.setVersion(version);
If now this method gets called again by Hibernate's StandardQueryCache for example, via OptimisticTreeCache.put(), then the workspace versioningImplicit still remains false. Since a put call like this one doesn't contain a set dataversion, the above method call will effectively reset the default DefaultDataVersion.ZERO of org.jboss.cache.optimistic.WorkspaceNodeImpl to null.
Since I do not have intimate knowledge of the JBoss and Hibernate code, I may be totally wrong, but adding the line below to OptimisticTreeCache.put() sure does fix the problem. This might not be the ideal fix since I assumed only StandardQueryCache directly calls OptimisticTreeCache.put():
option.setDataVersion(DefaultDataVersion.ZERO);
2/ The second part of the problem seems similar, but it appears to be caused by a call to writeLoad() where source==null. This also ultimately boils down to passing in an Option with a dataversion null. In the stack this happens when loading a one to many collection. But I'm still trying to find out what is happening there.
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20 years, 1 month
[JBoss Seam] - Question on SeamServletFilter and IllegalStateExceptions
by bsmithjj
I am using SeamServletFilter to handle ajax requests in my app (*.ajax). I have noticed that when I invoke a view using the *.seam extension (which is handled by SeamExceptionFilter and SeamRedirectFilter everything 'behaves' just fine. On the other hand, when I make same request to the server and switch to the *.ajax extension, the view renders correctly but the server displays an IllegalStateException (and stack trace):
13:26:31,545 ERROR [SeamServletFilter] ended request due to exception
| java.lang.IllegalStateException: No active event context
| at org.jboss.seam.core.Manager.instance(Manager.java:301)
| at org.jboss.seam.servlet.SeamServletFilter.doFilter(SeamServletFilter.java:50)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at edu.yale.its.tp.cas.client.filter.CASFilter.doFilter(CASFilter.java:436)
| 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 org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| 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)
| 13:26:31,561 ERROR [[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
| java.lang.IllegalStateException: No active event context
| at org.jboss.seam.core.Manager.instance(Manager.java:301)
| at org.jboss.seam.servlet.SeamServletFilter.doFilter(SeamServletFilter.java:50)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at edu.yale.its.tp.cas.client.filter.CASFilter.doFilter(CASFilter.java:436)
| 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 org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
| 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)
Why is the exception being thrown?
Thanks
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20 years, 1 month