Low This exception is seen on the client side (Confluence) seemingly randomly.
007-07-12 14:41:32,058 FATAL [http-10.10.40.96-80-Processor9] [service.soap.client.SecurityServerClient] authenticatePrincipal Unable to connect to the crowd server: null :Could not invoke service.. Nested exception is org.codehaus.xfire.fault.XFireFault: Unexpected EOF in prolog
at [row,col
org.codehaus.xfire.XFireRuntimeException: Could not invoke service.. Nested exception is org.codehaus.xfire.fault.XFireFault: Unexpected EOF in prolog
at [row,col {unknown-source}
]: [1,0]
org.codehaus.xfire.fault.XFireFault: Unexpected EOF in prolog
at [row,col
at org.codehaus.xfire.fault.XFireFault.createFault(XFireFault.java:89)
at org.codehaus.xfire.client.Client.onReceive(Client.java:386)
at org.codehaus.xfire.transport.http.HttpChannel.sendViaClient(HttpChannel.java:139)
at org.codehaus.xfire.transport.http.HttpChannel.send(HttpChannel.java:48)
at org.codehaus.xfire.handler.OutMessageSender.invoke(OutMessageSender.java:26)
at org.codehaus.xfire.handler.HandlerPipeline.invoke(HandlerPipeline.java:131)
at org.codehaus.xfire.client.Invocation.invoke(Invocation.java:75)
at org.codehaus.xfire.client.Client.invoke(Client.java:335)
at org.codehaus.xfire.client.XFireProxy.handleRequest(XFireProxy.java:77)
at org.codehaus.xfire.client.XFireProxy.invoke(XFireProxy.java:57)
at $Proxy42.authenticatePrincipal(Unknown Source)
at com.atlassian.crowd.integration.service.soap.client.SecurityServerClient.authenticatePrincipal(SecurityServerClient.java:34)
at com.atlassian.crowd.integration.atlassianuser.CrowdAuthenticator.authenticate(CrowdAuthenticator.java:39)
at com.atlassian.user.impl.delegation.security.authentication.DelegatingAuthenticator.authenticate(DelegatingAuthenticator.java:53)
at bucket.user.DefaultUserAccessor.authenticate(DefaultUserAccessor.java:689)
at sun.reflect.GeneratedMethodAccessor1151.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:284)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:155)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:122)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:56)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:174)
at $Proxy16.authenticate(Unknown Source)
at com.atlassian.confluence.user.ConfluenceAuthenticator.authenticate(ConfluenceAuthenticator.java:43)
at com.atlassian.seraph.auth.DefaultAuthenticator.login(DefaultAuthenticator.java:85)
at com.atlassian.confluence.user.ConfluenceAuthenticator.login(ConfluenceAuthenticator.java:26)
at com.atlassian.seraph.filter.LoginFilter.doFilter(LoginFilter.java:127)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.atlassian.confluence.util.ClusterHeaderFilter.doFilter(ClusterHeaderFilter.java:35)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.atlassian.johnson.filters.JohnsonFilter.doFilter(JohnsonFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:172)
at com.atlassian.spring.filter.FlushingSpringSessionInViewFilter.doFilterInternal(FlushingSpringSessionInViewFilter.java:29)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:122)
at com.atlassian.core.filters.ProfilingAndErrorFilter.doFilter(ProfilingAndErrorFilter.java:27)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.atlassian.confluence.util.RequestCacheThreadLocalFilter.doFilter(RequestCacheThreadLocalFilter.java:25)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.atlassian.core.filters.gzip.GzipFilter.doFilter(GzipFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.atlassian.core.filters.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:37)
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.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:667)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Caused by: com.ctc.wstx.exc.WstxEOFException: Unexpected EOF in prolog
at [row,col {unknown-source}
]: [1,0]
at com.ctc.wstx.sr.StreamScanner.throwUnexpectedEOF(StreamScanner.java:628)
at com.ctc.wstx.sr.BasicStreamReader.handleEOF(BasicStreamReader.java:1970)
at com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:1883)
at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1026)
at org.codehaus.xfire.soap.handler.ReadHeadersHandler.invoke(ReadHeadersHandler.java:44)
at org.codehaus.xfire.handler.HandlerPipeline.invoke(HandlerPipeline.java:131)
at org.codehaus.xfire.client.Client.onReceive(Client.java:382)
... 65 more
[CWD-439] Errors in the Confluence logs about Crowd (XFire prolog EOF)
Justin Koke
added a comment - As part of our 1.3 release we have updated the wstx libs have been updated. I am going to remove the fix-for version currently, since I can't replicate it in any of our environments.
If anyone can give us some clear replication steps with a 1.3 release of Crowd (releasing today), we will look into addressing this issue in an upcoming release.
Justin Koke
added a comment - As part of our 1.3 release we have updated the wstx libs have been updated. I am going to remove the fix-for version currently, since I can't replicate it in any of our environments.
If anyone can give us some clear replication steps with a 1.3 release of Crowd (releasing today), we will look into addressing this issue in an upcoming release. Please investigate upgrading the jaxb libraries (and xfire).
Additional exception:
java.rmi.RemoteException: Could not invoke service.. Nested exception is org.codehaus.xfire.fault.XFireFault: There must be a method name element.; nested exception is:
org.codehaus.xfire.XFireRuntimeException: Could not invoke service.. Nested exception is org.codehaus.xfire.fault.XFireFault: There must be a method name element.
at com.atlassian.crowd.integration.service.soap.client.SecurityServerClient.isValidToken(SecurityServerClient.java:66)
at com.atlassian.crowd.integration.http.HttpAuthenticator.isAuthenticated(HttpAuthenticator.java:137)
at com.atlassian.crowd.integration.http.VerifyTokenFilter.doFilter(VerifyTokenFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.atlassian.core.filters.gzip.GzipFilter.doFilter(GzipFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at com.atlassian.core.filters.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:37)
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)
Cory Tucker
added a comment - This happens all the time on our server setup. We have been trying for several weeks now to get some of our apps integrated with Crowd. It has not been terribly easy and is a bit buggy - errors like this are the most troubling for us. Are there any workarounds or at least a root cause? This is pretty critical for us.
Cory Tucker
added a comment - This happens all the time on our server setup. We have been trying for several weeks now to get some of our apps integrated with Crowd. It has not been terribly easy and is a bit buggy - errors like this are the most troubling for us. Are there any workarounds or at least a root cause? This is pretty critical for us. 
a "\u0000" was being found in an exception message being returned by Active Directory and thus prematurely terminating the SOAP envelope that was being created by XFire.