Re: Replicated context is failing...or not ?

Mon, 30 Mar 2009 14:20:09 -0700 

remove the 'docBase' attribute from context.xml

Filip

János Löbb wrote:

Hi,
3 machines, - pathsrv1, raid2b, reptile - Macs with OSX 10.5.6. Apache 2.2.9 mod_jk 1.2.26 and Tomcat 6.0.18. Every machine has one Tomcat instance and they form a cluster. Pathsrv1 act as a reverse proxy, so the request for the only clustered web app is coming as: 

http://pathsrv1.yalepath.org/apps/CassetteLabeler.
The application works fine. It seemingly also fails over. The session is replicated. However et every startup I see this in the catalina.<date>.log: 

<snip>
Mar 29, 2009 11:59:44 AM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: .:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java 
Mar 29, 2009 11:59:44 AM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Mar 29, 2009 11:59:44 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 427 ms
Mar 29, 2009 11:59:44 AM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Mar 29, 2009 11:59:44 AM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.18
Mar 29, 2009 11:59:44 AM org.apache.catalina.ha.tcp.SimpleTcpCluster start 
INFO: Cluster is about to start
Mar 29, 2009 11:59:44 AM org.apache.catalina.tribes.transport.ReceiverBase bind 
INFO: Receiver Server Socket bound to:/10.48.106.101:4000
Mar 29, 2009 11:59:44 AM org.apache.catalina.tribes.membership.McastServiceImpl setupSocket 
INFO: Setting cluster mcast soTimeout to 500
Mar 29, 2009 11:59:44 AM org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers INFO: Sleeping for 1000 milliseconds to establish cluster membership, start level:4 Mar 29, 2009 11:59:45 AM org.apache.catalina.ha.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 48, 106, 44}:4000,{10, 48, 106, 44},4000, alive=635579,id={52 -41 110 -92 62 -31 69 -107 -125 23 -35 74 71 -34 83 -68 }, payload={}, command={}, domain={}, ] Mar 29, 2009 11:59:45 AM org.apache.catalina.ha.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 48, 106, 107}:4000,{10, 48, 106, 107},4000, alive=1078841,id={17 -73 -19 -61 -104 103 73 -81 -117 69 58 -59 78 -1 -56 -41 }, payload={}, command={}, domain={}, ] Mar 29, 2009 11:59:45 AM org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers 
INFO: Done sleeping, membership established, start level:4
Mar 29, 2009 11:59:45 AM org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers INFO: Sleeping for 1000 milliseconds to establish cluster membership, start level:8 Mar 29, 2009 11:59:45 AM org.apache.catalina.tribes.io.BufferPool getBufferPool INFO: Created a buffer pool with max size:104857600 bytes of type:org.apache.catalina.tribes.io.BufferPool15Impl Mar 29, 2009 11:59:46 AM org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers 
INFO: Done sleeping, membership established, start level:8
Mar 29, 2009 11:59:47 AM org.apache.catalina.startup.HostConfig deployDescriptor WARNING: A docBase /usr/local/apache-tomcat-6.0.18/webapps/ROOT inside the host appBase has been specified, and will be ignored Mar 29, 2009 11:59:47 AM org.apache.catalina.ha.context.ReplicatedContext start 
SEVERE: Unable to start ReplicatedContext
java.lang.NullPointerException
    at java.io.File.<init>(File.java:194)
at org.apache.catalina.core.StandardContext.getBasePath(StandardContext.java:4784) at org.apache.catalina.ha.context.ReplicatedContext.start(ReplicatedContext.java:62) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:627) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488) 
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) 
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) 
    at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:585)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Mar 29, 2009 11:59:47 AM org.apache.catalina.core.ContainerBase addChildInternal 
SEVERE: ContainerBase.addChild: start:
LifecycleException: Failed to start ReplicatedContext: java.lang.NullPointerException at org.apache.catalina.ha.context.ReplicatedContext.start(ReplicatedContext.java:73) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:627) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488) 
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) 
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) 
    at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:585)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Mar 29, 2009 11:59:47 AM org.apache.catalina.startup.HostConfig deployDescriptor 
SEVERE: Error deploying configuration descriptor CassetteLabeler.xml
java.lang.IllegalStateException: ContainerBase.addChild: start: LifecycleException: Failed to start ReplicatedContext: java.lang.NullPointerException at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:795) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:627) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488) 
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) 
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:516) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) 
    at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:585)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Mar 29, 2009 11:59:48 AM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive CassetteLabeler.war
Mar 29, 2009 11:59:48 AM org.apache.catalina.ha.session.DeltaManager start INFO: Register manager /CassetteLabeler to cluster element Engine with name Catalina Mar 29, 2009 11:59:48 AM org.apache.catalina.ha.session.DeltaManager start 
INFO: Starting clustering manager at /CassetteLabeler
Mar 29, 2009 11:59:48 AM org.apache.catalina.ha.session.DeltaManager getAllClusterSessions WARNING: Manager [localhost#/CassetteLabeler], requesting session state from org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 48, 106, 107}:4000,{10, 48, 106, 107},4000, alive=1081343,id={17 -73 -19 -61 -104 103 73 -81 -117 69 58 -59 78 -1 -56 -41 }, payload={}, command={}, domain={}, ]. This operation will timeout if no session state has been received within 60 seconds. Mar 29, 2009 12:00:48 PM org.apache.catalina.ha.session.DeltaManager waitForSendAllSessions SEVERE: Manager [localhost#/CassetteLabeler]: No session state send at 3/29/09 11:59 AM received, timing out after 60,020 ms. 
Mar 29, 2009 12:00:48 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive Dictation.war
Mar 29, 2009 12:00:48 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive Dictation2.war
Mar 29, 2009 12:00:48 PM org.apache.catalina.ha.session.JvmRouteBinderValve start 
INFO: JvmRouteBinderValve started
Mar 29, 2009 12:00:48 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Mar 29, 2009 12:00:48 PM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Mar 29, 2009 12:00:48 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/24  config=null
Mar 29, 2009 12:00:48 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 63740 ms
</snip>

Here is the context.xml from the app's META-INF directory

<snip>
<?xml version="1.0" encoding="UTF-8"?>
<Context path="" docBase="ROOT" className="org.apache.catalina.ha.context.ReplicatedContext"> 


</Context>

What am I missing here ?

Thanks ahead,

János

</snip>



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