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From Gianny Damour <gianny.dam...@optusnet.com.au>
Subject Re: 2.2 in production
Date Sun, 01 Nov 2009 09:53:40 GMT
Hi Trygve,

Thanks for reporting these problems with comprehensive log messages;  
they were very helpful to diagnose.

The bug causing the inability to reliably restart without downtime  
has been identified and fixed. I just deployed new WADI 2.2-SNAPSHOT  
artifacts, which can be found there:

http://snapshots.repository.codehaus.org/org/codehaus/wadi/


Can you please confirm that this is now working as expected within  
your environment?


Regarding the warning message

> 16:22:43,524 WARN  [UpdateReplicationCommand] Update has not been  
> properly cascaded due to a communication failure. If a targeted  
> node has been lost, state will be re-balanced automatically.

the timeout is not exposed via API. Even if this warning message is  
displayed, an update message has actually been queued for delivery to  
the relevant back-up nodes. However, there is no guarantee that in  
case of failure, the cluster will be able to restore the latest  
session state as the latest update message may not have actually been  
delivered to back-up nodes.

I conducted load-testing on a single computer. As the network traffic  
going through the loopback interface does not actually touch the  
network card, this is a problem I was never able to observe.

Do you have an idea of the traffic volume when this warning message  
starts to appear? Also, do you have an idea of the session size?

Thanks,
Gianny

On 31/10/2009, at 3:39 AM, Trygve Hardersen wrote:

> Hello
>
> We have been using Geronimo 2.2-SNAPSHOT in production for a good  
> month now, and I thought I'd share some experiences with the  
> community, and maybe get some help. We are an online backup  
> service, check out jottabackup.com if you're interested.
>
> Generally our experience has been very positive. We're using the  
> GBean framework for custom server components, the DB connection  
> pools against MySQL databases, stateless service EJBs and various  
> MDB, and of course the web tier (Jetty). Everything is running  
> smoothly and we're very much looking forward to 2.2 being released  
> so we can "release" our own software.
>
> The issues we're having are related to WADI clustering with Jetty.  
> First we can't use Jetty7 because of GERONIMO-4846, so we're using  
> Jetty6 which works fine. The more serious issue is that we often  
> can not update our servers without downtime. This is what happens:
>
> We have 2 application servers (AS-000 and AS-001) running dynamic  
> WADI HTTP session replication between them. When updating we first  
> stop one, AS-000 in this case. That works fine and the active  
> sessions are migrated to AS-001:
>
> 23:43:18,160 INFO  [SimpleStateManager]
> =============================
> New Partition Balancing
> Partition Balancing
>     Size [24]
>     Partition[0] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[1] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[2] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[3] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[4] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[5] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[6] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[7] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[8] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[9] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[10] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[11] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[12] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[13] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[14] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[15] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[16] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[17] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[18] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[19] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[20] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[21] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[22] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
>     Partition[23] owned by [TribesPeer [AS-001; tcp:// 
> 10.0.10.101:4000]]; version [3]; mergeVersion [0]
> =============================
>
> 23:43:28,539 INFO  [TcpFailureDetector] Verification complete.  
> Member disappeared[org.apache.catalina.tribes.membership.MemberImpl 
> [tcp://{10, 0, 10, 100}:4000,{10, 0, 10, 100},4000,  
> alive=41104531,id={-4 -32 54 90 -109 -17 65 64 -117 40 -110 -14 36  
> 93 -12 -118 }, payload={-84 -19 0 5 115 114 0 50 111 ...(423)},  
> command={66 65 66 89 45 65 76 69 88 ...(9)}, domain={74 79 84 84 65  
> 95 87 65 68 ...(10)}, ]]
> 23:43:28,540 INFO  [ChannelInterceptorBase] memberDisappeared:tcp:// 
> {10, 0, 10, 100}:4000
>
> We then update AS-000 and try to start it, but it fails to rejoin  
> the WADI cluster:
>
> 23:46:30,784 INFO  [ReceiverBase] Receiver Server Socket bound to:/ 
> 10.0.10.100:4000
> 23:46:30,864 INFO  [ChannelInterceptorBase] memberStart  
> local:org.apache.catalina.tribes.membership.MemberImpl[tcp:// 
> 10.0.10.100:4000,10.0.10.100,4000, alive=0,id={-103 34 80 -19 68  
> -51 70 -91 -108 39 -84 65 50 50 103 -107 }, payload={-84 -19 0 5  
> 115 114 0 50 111 ...(423)}, command={}, domain={74 79 84 84 65 95  
> 87 65 68 ...(10)}, ] notify:false peer:AS-000
> 23:46:30,868 INFO  [McastService] Setting cluster mcast soTimeout  
> to 500
> 23:46:30,908 INFO  [McastService] Sleeping for 1000 milliseconds to  
> establish cluster membership, start level:4
> 23:46:31,139 INFO  [ChannelInterceptorBase] memberAdded:tcp://{10,  
> 0, 10, 101}:4000
> 23:46:31,908 INFO  [McastService] Done sleeping, membership  
> established, start level:4
> 23:46:31,912 INFO  [McastService] Sleeping for 1000 milliseconds to  
> establish cluster membership, start level:8
> 23:46:31,927 INFO  [BufferPool] Created a buffer pool with max size: 
> 104857600 bytes of type:org.apache.catalina.tribes.io.BufferPool15Impl
> 23:46:32,912 INFO  [McastService] Done sleeping, membership  
> established, start level:8
> 23:46:32,912 INFO  [ChannelInterceptorBase] memberStart  
> local:org.apache.catalina.tribes.membership.MemberImpl[tcp:// 
> 10.0.10.100:4000,10.0.10.100,4000, alive=272,id={-103 34 80 -19 68  
> -51 70 -91 -108 39 -84 65 50 50 103 -107 }, payload={-84 -19 0 5  
> 115 114 0 50 111 ...(423)}, command={}, domain={74 79 84 84 65 95  
> 87 65 68 ...(10)}, ] notify:false peer:AS-000
> 23:46:37,848 INFO  [DiscStore] Creating directory: /usr/lib/jotta/ 
> jotta-as-prod-1.0-SNAPSHOT/var/temp/SessionStore
> 23:46:37,930 INFO  [BasicSingletonServiceHolder] [TribesPeer  
> [AS-000; tcp://10.0.10.100:4000]] owns singleton service  
> [PartitionManager for ServiceSpace [/]]
> 23:46:37,964 INFO  [BasicSingletonServiceHolder] [TribesPeer  
> [AS-000; tcp://10.0.10.100:4000]] resigns ownership of singleton  
> service [PartitionManager for ServiceSpace [/]]
> 23:47:40,065 ERROR [BasicServiceRegistry] Error while starting  
> [Holder for service  
> [org.codehaus.wadi.location.partitionmanager.SimplePartitionManager@7d 
> c2445f] named [PartitionManager] in space [ServiceSpace [/]]]
> org.codehaus.wadi.location.partitionmanager.PartitionManagerException: 
>  Partition [0] is unknown.
> 	at  
> org.codehaus.wadi.location.partitionmanager.SimplePartitionManager.wai 
> tForBoot(SimplePartitionManager.java:248)
> 	at  
> org.codehaus.wadi.location.partitionmanager.SimplePartitionManager.sta 
> rt(SimplePartitionManager.java:119)
> 	at org.codehaus.wadi.servicespace.basic.BasicServiceHolder.start 
> (BasicServiceHolder.java:60)
> 	at org.codehaus.wadi.servicespace.basic.BasicServiceRegistry.start 
> (BasicServiceRegistry.java:152)
> 	at org.codehaus.wadi.servicespace.basic.BasicServiceSpace.start 
> (BasicServiceSpace.java:169)
> 	at  
> org.apache.geronimo.clustering.wadi.BasicWADISessionManager.doStart 
> (BasicWADISessionManager.java:125)
> 	at org.apache.geronimo.gbean.runtime.GBeanInstance.createInstance 
> (GBeanInstance.java:948)
> 	at  
> org.apache.geronimo.gbean.runtime.GBeanInstanceState.attemptFullStart( 
> GBeanInstanceState.java:269)
> 	at org.apache.geronimo.gbean.runtime.GBeanInstanceState.start 
> (GBeanInstanceState.java:103)
> 	at  
> org.apache.geronimo.gbean.runtime.GBeanInstanceState.startRecursive 
> (GBeanInstanceState.java:125)
> 	at org.apache.geronimo.gbean.runtime.GBeanInstance.startRecursive 
> (GBeanInstance.java:538)
> 	at org.apache.geronimo.kernel.basic.BasicKernel.startRecursiveGBean 
> (BasicKernel.java:377)
> 	at  
> org.apache.geronimo.kernel.config.ConfigurationUtil.startConfiguration 
> GBeans(ConfigurationUtil.java:456)
> 	at  
> org.apache.geronimo.kernel.config.ConfigurationUtil.startConfiguration 
> GBeans(ConfigurationUtil.java:493)
> 	at  
> org.apache.geronimo.kernel.config.KernelConfigurationManager.start 
> (KernelConfigurationManager.java:190)
> 	at  
> org.apache.geronimo.kernel.config.SimpleConfigurationManager.startConf 
> iguration(SimpleConfigurationManager.java:546)
> 	at sun.reflect.GeneratedMethodAccessor22.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke 
> (DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.geronimo.gbean.runtime.ReflectionMethodInvoker.invoke 
> (ReflectionMethodInvoker.java:34)
> 	at org.apache.geronimo.gbean.runtime.GBeanOperation.invoke 
> (GBeanOperation.java:130)
> 	at org.apache.geronimo.gbean.runtime.GBeanInstance.invoke 
> (GBeanInstance.java:815)
> 	at org.apache.geronimo.gbean.runtime.RawInvoker.invoke 
> (RawInvoker.java:57)
> 	at org.apache.geronimo.kernel.basic.RawOperationInvoker.invoke 
> (RawOperationInvoker.java:35)
> 	at  
> org.apache.geronimo.kernel.basic.ProxyMethodInterceptor.intercept 
> (ProxyMethodInterceptor.java:96)
> 	at org.apache.geronimo.gbean.GBeanLifecycle$$EnhancerByCGLIB$ 
> $628b9237.startConfiguration(<generated>)
> 	at org.apache.geronimo.system.main.EmbeddedDaemon.doStartup 
> (EmbeddedDaemon.java:161)
> 	at org.apache.geronimo.system.main.EmbeddedDaemon.execute 
> (EmbeddedDaemon.java:78)
> 	at  
> org.apache.geronimo.kernel.util.MainConfigurationBootstrapper.main 
> (MainConfigurationBootstrapper.java:45)
> 	at org.apache.geronimo.cli.AbstractCLI.executeMain 
> (AbstractCLI.java:65)
> 	at org.apache.geronimo.cli.daemon.DaemonCLI.main(DaemonCLI.java:30)
> 23:47:40,078 ERROR [BasicWADISessionManager] Failed to stop
> org.codehaus.wadi.servicespace.ServiceSpaceNotFoundException:  
> ServiceSpaceName not found
> 	at  
> org.codehaus.wadi.servicespace.basic.BasicServiceSpaceRegistry.unregis 
> ter(BasicServiceSpaceRegistry.java:55)
> 	at  
> org.codehaus.wadi.servicespace.basic.BasicServiceSpace.unregisterServi 
> ceSpace(BasicServiceSpace.java:228)
> 	at org.codehaus.wadi.servicespace.basic.BasicServiceSpace.stop 
> (BasicServiceSpace.java:175)
> 	at  
> org.apache.geronimo.clustering.wadi.BasicWADISessionManager.doFail 
> (BasicWADISessionManager.java:134)
> 	at org.apache.geronimo.gbean.runtime.GBeanInstance.createInstance 
> (GBeanInstance.java:978)
> 	at  
> org.apache.geronimo.gbean.runtime.GBeanInstanceState.attemptFullStart( 
> GBeanInstanceState.java:269)
> 	at org.apache.geronimo.gbean.runtime.GBeanInstanceState.start 
> (GBeanInstanceState.java:103)
> 	at  
> org.apache.geronimo.gbean.runtime.GBeanInstanceState.startRecursive 
> (GBeanInstanceState.java:125)
> 	at org.apache.geronimo.gbean.runtime.GBeanInstance.startRecursive 
> (GBeanInstance.java:538)
> 	at org.apache.geronimo.kernel.basic.BasicKernel.startRecursiveGBean 
> (BasicKernel.java:377)
> 	at  
> org.apache.geronimo.kernel.config.ConfigurationUtil.startConfiguration 
> GBeans(ConfigurationUtil.java:456)
> 	at  
> org.apache.geronimo.kernel.config.ConfigurationUtil.startConfiguration 
> GBeans(ConfigurationUtil.java:493)
> 	at  
> org.apache.geronimo.kernel.config.KernelConfigurationManager.start 
> (KernelConfigurationManager.java:190)
> 	at  
> org.apache.geronimo.kernel.config.SimpleConfigurationManager.startConf 
> iguration(SimpleConfigurationManager.java:546)
> 	at sun.reflect.GeneratedMethodAccessor22.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke 
> (DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.geronimo.gbean.runtime.ReflectionMethodInvoker.invoke 
> (ReflectionMethodInvoker.java:34)
> 	at org.apache.geronimo.gbean.runtime.GBeanOperation.invoke 
> (GBeanOperation.java:130)
> 	at org.apache.geronimo.gbean.runtime.GBeanInstance.invoke 
> (GBeanInstance.java:815)
> 	at org.apache.geronimo.gbean.runtime.RawInvoker.invoke 
> (RawInvoker.java:57)
> 	at org.apache.geronimo.kernel.basic.RawOperationInvoker.invoke 
> (RawOperationInvoker.java:35)
> 	at  
> org.apache.geronimo.kernel.basic.ProxyMethodInterceptor.intercept 
> (ProxyMethodInterceptor.java:96)
> 	at org.apache.geronimo.gbean.GBeanLifecycle$$EnhancerByCGLIB$ 
> $628b9237.startConfiguration(<generated>)
> 	at org.apache.geronimo.system.main.EmbeddedDaemon.doStartup 
> (EmbeddedDaemon.java:161)
> 	at org.apache.geronimo.system.main.EmbeddedDaemon.execute 
> (EmbeddedDaemon.java:78)
> 	at  
> org.apache.geronimo.kernel.util.MainConfigurationBootstrapper.main 
> (MainConfigurationBootstrapper.java:45)
> 	at org.apache.geronimo.cli.AbstractCLI.executeMain 
> (AbstractCLI.java:65)
> 	at org.apache.geronimo.cli.daemon.DaemonCLI.main(DaemonCLI.java:30)
>
> After this failure the server stops. Over at the running instance  
> AS-001 this is logged:
>
> 23:46:31,909 INFO  [ChannelInterceptorBase] memberAdded:tcp://{10,  
> 0, 10, 100}:4000
> 23:46:37,929 INFO  [BasicSingletonServiceHolder] [TribesPeer  
> [AS-001; tcp://10.0.10.101:4000]] owns singleton service  
> [PartitionManager for ServiceSpace [/]]
> 23:46:37,929 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
> 23:46:38,438 ERROR [BasicEnvelopeDispatcherManager] problem  
> dispatching message
> java.lang.IllegalArgumentException:  
> org.codehaus.wadi.core.store.BasicStoreMotable is not a Session
> 	at  
> org.codehaus.wadi.replication.manager.basic.SessionStateHandler.newExt 
> ractFullStateExternalizable(SessionStateHandler.java:105)
> 	at  
> org.codehaus.wadi.replication.manager.basic.SessionStateHandler.extrac 
> tFullState(SessionStateHandler.java:53)
> 	at  
> org.codehaus.wadi.replication.manager.basic.CreateStorageCommand.execu 
> te(CreateStorageCommand.java:45)
> 	at  
> org.codehaus.wadi.replication.manager.basic.SyncSecondaryManager.updat 
> eSecondaries(SyncSecondaryManager.java:169)
> 	at  
> org.codehaus.wadi.replication.manager.basic.SyncSecondaryManager.updat 
> eSecondaries(SyncSecondaryManager.java:114)
> 	at  
> org.codehaus.wadi.replication.manager.basic.SyncSecondaryManager.updat 
> eSecondaries(SyncSecondaryManager.java:103)
> 	at  
> org.codehaus.wadi.replication.manager.basic.SyncSecondaryManager.updat 
> eSecondariesFollowingJoiningPeer(SyncSecondaryManager.java:75)
> 	at  
> org.codehaus.wadi.replication.manager.basic.ReOrganizeSecondariesListe 
> ner.receive(ReOrganizeSecondariesListener.java:53)
> 	at  
> org.codehaus.wadi.servicespace.basic.BasicServiceMonitor.notifyListene 
> rs(BasicServiceMonitor.java:124)
> 	at  
> org.codehaus.wadi.servicespace.basic.BasicServiceMonitor.processLifecy 
> cleEvent(BasicServiceMonitor.java:141)
> 	at org.codehaus.wadi.servicespace.basic.BasicServiceMonitor 
> $ServiceLifecycleEndpoint.dispatch(BasicServiceMonitor.java:148)
> 	at org.codehaus.wadi.group.impl.ServiceEndpointWrapper.dispatch 
> (ServiceEndpointWrapper.java:50)
> 	at org.codehaus.wadi.group.impl.BasicEnvelopeDispatcherManager 
> $DispatchRunner.run(BasicEnvelopeDispatcherManager.java:121)
> 	at org.codehaus.wadi.servicespace.basic.BasicServiceSpaceDispatcher 
> $ExecuteInThread.execute(BasicServiceSpaceDispatcher.java:102)
> 	at  
> org.codehaus.wadi.group.impl.BasicEnvelopeDispatcherManager.onEnvelope 
> (BasicEnvelopeDispatcherManager.java:100)
> 	at org.codehaus.wadi.group.impl.AbstractDispatcher.doOnEnvelope 
> (AbstractDispatcher.java:104)
> 	at org.codehaus.wadi.group.impl.AbstractDispatcher.onEnvelope 
> (AbstractDispatcher.java:100)
> 	at  
> org.codehaus.wadi.servicespace.basic.ServiceSpaceEndpoint.dispatch 
> (ServiceSpaceEndpoint.java:49)
> 	at org.codehaus.wadi.group.impl.ServiceEndpointWrapper.dispatch 
> (ServiceEndpointWrapper.java:50)
> 	at org.codehaus.wadi.group.impl.BasicEnvelopeDispatcherManager 
> $DispatchRunner.run(BasicEnvelopeDispatcherManager.java:121)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask 
> (ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run 
> (ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:619)
> 23:46:40,063 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
> 23:46:42,938 WARN  [BasicPartitionBalancerSingletonService]  
> Rebalancing has failed
> org.codehaus.wadi.group.MessageExchangeException: No correlated  
> messages received within [5000]ms
> 	at  
> org.codehaus.wadi.group.impl.AbstractDispatcher.attemptMultiRendezVous 
> (AbstractDispatcher.java:174)
> 	at  
> org.codehaus.wadi.location.balancing.BasicPartitionBalancer.fetchBalan 
> cingInfoState(BasicPartitionBalancer.java:85)
> 	at  
> org.codehaus.wadi.location.balancing.BasicPartitionBalancer.balancePar 
> titions(BasicPartitionBalancer.java:69)
> 	at  
> org.codehaus.wadi.location.balancing.BasicPartitionBalancerSingletonSe 
> rvice.run(BasicPartitionBalancerSingletonService.java:85)
> 	at java.lang.Thread.run(Thread.java:619)
> 23:46:42,939 WARN  [BasicPartitionBalancerSingletonService] Will  
> retry rebalancing in [500] ms
> 23:46:43,439 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
> 23:47:40,269 INFO  [TcpFailureDetector] Verification complete.  
> Member disappeared[org.apache.catalina.tribes.membership.MemberImpl 
> [tcp://{10, 0, 10, 100}:4000,{10, 0, 10, 100},4000, alive=69401,id= 
> {-103 34 80 -19 68 -51 70 -91 -108 39 -84 65 50 50 103 -107 },  
> payload={-84 -19 0 5 115 114 0 50 111 ...(423)}, command={66 65 66  
> 89 45 65 76 69 88 ...(9)}, domain={74 79 84 84 65 95 87 65 68 ... 
> (10)}, ]]
> 23:47:40,271 INFO  [ChannelInterceptorBase] memberDisappeared:tcp:// 
> {10, 0, 10, 100}:4000
> 23:47:40,271 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
>
> If I try to start AS-000 again the same thing happens. If we stop  
> AS-001 the following is logged;
>
> 23:49:18,695 INFO  [SimpleStateManager] Evacuating partitions
> 23:49:18,699 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
> 23:49:23,698 WARN  [SimpleStateManager] Partition balancer has  
> disappeared - backing off for [1000]ms
> 23:49:24,699 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
> 23:49:29,698 WARN  [SimpleStateManager] Partition balancer has  
> disappeared - backing off for [1000]ms
> 23:49:30,699 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
> 23:49:35,699 WARN  [SimpleStateManager] Partition balancer has  
> disappeared - backing off for [1000]ms
> 23:49:36,700 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
> 23:49:41,699 WARN  [SimpleStateManager] Partition balancer has  
> disappeared - backing off for [1000]ms
> 23:49:42,701 INFO  [BasicPartitionBalancerSingletonService]  
> Queueing partition rebalancing
> 23:49:47,700 WARN  [SimpleStateManager] Partition balancer has  
> disappeared - backing off for [1000]ms
> 23:49:48,700 INFO  [SimpleStateManager] Evacuated
> 23:49:48,808 INFO  [AbstractExclusiveContextualiser] Unloaded  
> sessions=[36]
> 23:49:48,843 INFO  [AbstractExclusiveContextualiser] Unloaded  
> sessions=[13]
> 23:49:58,852 INFO  [BasicSingletonServiceHolder] [TribesPeer  
> [AS-001; tcp://10.0.10.101:4000]] resigns ownership of singleton  
> service [PartitionManager for ServiceSpace [/]]
>
> , however AS-001 then just hangs, and we have to kill the process  
> to get it stopped. After this we can start AS-000, update AS-001  
> and it always seems to have no problem joining the cluster  
> thereafter. The strange thing is that this problem does not always  
> occur, sometimes everything goes fine. I can't find a consistent  
> pattern but I've tried stopping AS-001 before AS-000, and I'm sure  
> no serializable object in the session has changed between the  
> updated and running instance.
>
> My gut feeling is that this is either a concurrency-related bug in  
> WADI or a network-timeout related problem. During normal operation  
> I'm sometimes seeing messages like this in the log files:
>
> 17:14:08,869 INFO  [TcpFailureDetector] Received memberDisappeared 
> [org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 0, 10,  
> 101}:4000,{10, 0, 10, 101},4000, alive=95659954,id={-52 -76 98 22  
> 10 71 76 -72 -122 -59 -21 -29 44 -86 38 114 }, payload={-84 -19 0 5  
> 115 114 0 50 111 ...(423)}, command={}, domain={74 79 84 84 65 95  
> 87 65 68 ...(10)}, ]] message. Will verify.
> 17:14:08,870 INFO  [TcpFailureDetector] Verification complete.  
> Member still alive[org.apache.catalina.tribes.membership.MemberImpl 
> [tcp://{10, 0, 10, 101}:4000,{10, 0, 10, 101},4000,  
> alive=95659954,id={-52 -76 98 22 10 71 76 -72 -122 -59 -21 -29 44  
> -86 38 114 }, payload={-84 -19 0 5 115 114 0 50 111 ...(423)},  
> command={}, domain={74 79 84 84 65 95 87 65 68 ...(10)}, ]]
> And lately, as traffic has increased, errors like this:
>
> 16:22:43,524 WARN  [UpdateReplicationCommand] Update has not been  
> properly cascaded due to a communication failure. If a targeted  
> node has been lost, state will be re-balanced automatically.
> org.codehaus.wadi.servicespace.ServiceInvocationException:  
> org.codehaus.wadi.group.MessageExchangeException: No correlated  
> messages received within [2000]ms
> 	at org.codehaus.wadi.servicespace.basic.CGLIBServiceProxyFactory 
> $ProxyMethodInterceptor.intercept(CGLIBServiceProxyFactory.java:209)
> 	at org.codehaus.wadi.replication.storage.ReplicaStorage$ 
> $EnhancerByCGLIB$$a901e91b.mergeUpdate(<generated>)
> 	at  
> org.codehaus.wadi.replication.manager.basic.UpdateReplicationCommand.c 
> ascadeUpdate(UpdateReplicationCommand.java:93)
> 	at  
> org.codehaus.wadi.replication.manager.basic.UpdateReplicationCommand.r 
> un(UpdateReplicationCommand.java:86)
> 	at  
> org.codehaus.wadi.replication.manager.basic.SyncReplicationManager.upd 
> ate(SyncReplicationManager.java:138)
> 	at  
> org.codehaus.wadi.replication.manager.basic.LoggingReplicationManager. 
> update(LoggingReplicationManager.java:100)
> 	at  
> org.codehaus.wadi.core.session.AbstractReplicableSession.onEndProcessi 
> ng(AbstractReplicableSession.java:49)
> 	at  
> org.codehaus.wadi.core.session.AtomicallyReplicableSession.onEndProces 
> sing(AtomicallyReplicableSession.java:58)
> 	at  
> org.apache.geronimo.clustering.wadi.WADISessionAdaptor.onEndAccess 
> (WADISessionAdaptor.java:77)
> 	at  
> org.apache.geronimo.jetty6.cluster.ClusteredSessionManager.complete 
> (ClusteredSessionManager.java:60)
> 	at org.mortbay.jetty.servlet.SessionHandler.handle 
> (SessionHandler.java:198)
> 	at  
> org.apache.geronimo.jetty6.cluster.ClusteredSessionHandler.doHandle 
> (ClusteredSessionHandler.java:59)
> 	at org.apache.geronimo.jetty6.cluster.ClusteredSessionHandler 
> $ActualHandler.handle(ClusteredSessionHandler.java:66)
> 	at org.apache.geronimo.jetty6.cluster.AbstractClusteredPreHandler 
> $WebClusteredInvocation.invokeLocally 
> (AbstractClusteredPreHandler.java:71)
> 	at org.apache.geronimo.jetty6.cluster.wadi.WADIClusteredPreHandler 
> $WADIWebClusteredInvocation.access$000(WADIClusteredPreHandler.java: 
> 52)
> 	at org.apache.geronimo.jetty6.cluster.wadi.WADIClusteredPreHandler 
> $WADIWebClusteredInvocation$1.doFilter(WADIClusteredPreHandler.java: 
> 64)
> 	at org.codehaus.wadi.web.impl.WebInvocation.invoke 
> (WebInvocation.java:116)
> 	at  
> org.codehaus.wadi.core.contextualiser.MemoryContextualiser.handleLocal 
> ly(MemoryContextualiser.java:71)
> 	at  
> org.codehaus.wadi.core.contextualiser.AbstractExclusiveContextualiser. 
> handle(AbstractExclusiveContextualiser.java:94)
> 	at  
> org.codehaus.wadi.core.contextualiser.AbstractMotingContextualiser.con 
> textualise(AbstractMotingContextualiser.java:37)
> 	at org.codehaus.wadi.core.manager.StandardManager.processStateful 
> (StandardManager.java:150)
> 	at org.codehaus.wadi.core.manager.StandardManager.contextualise 
> (StandardManager.java:142)
> 	at org.codehaus.wadi.core.manager.ClusteredManager.contextualise 
> (ClusteredManager.java:81)
> 	at org.apache.geronimo.jetty6.cluster.wadi.WADIClusteredPreHandler 
> $WADIWebClusteredInvocation.invoke(WADIClusteredPreHandler.java:72)
> 	at  
> org.apache.geronimo.jetty6.cluster.AbstractClusteredPreHandler.handle( 
> AbstractClusteredPreHandler.java:39)
> 	at  
> org.apache.geronimo.jetty6.cluster.ClusteredSessionHandler.handle 
> (ClusteredSessionHandler.java:51)
> 	at org.mortbay.jetty.handler.ContextHandler.handle 
> (ContextHandler.java:765)
> 	at org.mortbay.jetty.webapp.WebAppContext.handle 
> (WebAppContext.java:417)
> 	at org.apache.geronimo.jetty6.handler.TwistyWebAppContext.access 
> $101(TwistyWebAppContext.java:41)
> 	at org.apache.geronimo.jetty6.handler.TwistyWebAppContext 
> $TwistyHandler.handle(TwistyWebAppContext.java:66)
> 	at  
> org.apache.geronimo.jetty6.handler.ThreadClassloaderHandler.handle 
> (ThreadClassloaderHandler.java:46)
> 	at org.apache.geronimo.jetty6.handler.InstanceContextHandler.handle 
> (InstanceContextHandler.java:58)
> 	at org.apache.geronimo.jetty6.handler.UserTransactionHandler.handle 
> (UserTransactionHandler.java:48)
> 	at  
> org.apache.geronimo.jetty6.handler.ComponentContextHandler.handle 
> (ComponentContextHandler.java:47)
> 	at org.apache.geronimo.jetty6.handler.TwistyWebAppContext.handle 
> (TwistyWebAppContext.java:60)
> 	at org.mortbay.jetty.handler.ContextHandlerCollection.handle 
> (ContextHandlerCollection.java:230)
> 	at org.mortbay.jetty.handler.HandlerCollection.handle 
> (HandlerCollection.java:114)
> 	at org.mortbay.jetty.handler.HandlerWrapper.handle 
> (HandlerWrapper.java:152)
> 	at org.mortbay.jetty.Server.handle(Server.java:326)
> 	at org.mortbay.jetty.HttpConnection.handleRequest 
> (HttpConnection.java:534)
> 	at org.mortbay.jetty.HttpConnection$RequestHandler.content 
> (HttpConnection.java:879)
> 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:747)
> 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
> 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 	at org.mortbay.io.nio.SelectChannelEndPoint.run 
> (SelectChannelEndPoint.java:409)
> 	at org.apache.geronimo.pool.ThreadPool$1.run(ThreadPool.java:214)
> 	at org.apache.geronimo.pool.ThreadPool 
> $ContextClassLoaderRunnable.run(ThreadPool.java:344)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask 
> (ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run 
> (ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:619)
> Caused by: org.codehaus.wadi.group.MessageExchangeException: No  
> correlated messages received within [2000]ms
> 	at  
> org.codehaus.wadi.group.impl.AbstractDispatcher.attemptMultiRendezVous 
> (AbstractDispatcher.java:174)
> 	at  
> org.codehaus.wadi.servicespace.basic.BasicServiceInvoker.invokeOnPeers 
> (BasicServiceInvoker.java:90)
> 	at org.codehaus.wadi.servicespace.basic.BasicServiceInvoker.invoke 
> (BasicServiceInvoker.java:69)
> 	at org.codehaus.wadi.servicespace.basic.CGLIBServiceProxyFactory 
> $ProxyMethodInterceptor.intercept(CGLIBServiceProxyFactory.java:193)
> 	... 49 more
>
> Does anyone have some insight into what might be causing this, or  
> where the timeouts can be increased if there are any?
>
> I'm thinking that a static WADI configuration can be more stable  
> than the dynamic setup we have not which relies upon multicasting.  
> Does anyone have experience with similar setups?
>
> Thanks!
>
> Trygve Hardersen - Jotta
>
>
>
>


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