[infinispan-issues] [JBoss JIRA] Updated: (ISPN-399) State transfer requests for non existing caches should not throw exception

State transfer requests for non existing caches should not throw exception -------------------------------------------------------------------------- Key: ISPN-399 URL: https://jira.jboss.org/jira/browse/ISPN-399 Project: Infinispan Issue Type: Bug Components: State transfer Affects Versions: 4.0.0.Final, 4.1.0.ALPHA2 Reporter: Galder Zamarreno Assignee: Galder Zamarreno Fix For: 4.1.0.ALPHA3 Attachments: infinispan.log, Preliminary_fix.patch I think this is my lucky week. Here comes another puzzle: I'm trying to prototype having a separate cache for Hot Rod topology view information and here's the sequence of events that happen: 1. Start 1st Hot Rod server which also starts up the Hot Rod topology cache (cache name = ___hotRodTopologyCache). JGroups local address is: eq-11980: 2010-04-13 17:13:36,056 3881 INFO [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (main:) Cache local address is eq-11980, physical addresses are [127.0.0.1:7900] 2010-04-13 17:13:36,056 3881 TRACE [org.infinispan.factories.GlobalComponentRegistry] (main:) Registering a shutdown hook. Configured behavior = DEFAULT 2010-04-13 17:13:36,057 3882 INFO [org.infinispan.factories.GlobalComponentRegistry] (main:) Infinispan version: Infinispan 'Starobrno' 4.1.0.SNAPSHOT 2010-04-13 17:13:36,057 3882 TRACE [org.infinispan.factories.GlobalComponentRegistry] (main:) Named component register, put org.infinispan.factories.ComponentRegistry@1d6fbb3 under ___hotRodTopologyCache in {}@ee6ad6 2. Start 2nd Hot Rod server which also starts up the Hot Rod topology cache (cache name = ___hotRodTopologyCache). JGroups local address is: eq-54009 2010-04-13 17:13:36,474 4299 INFO [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (main:) Cache local address is eq-54009, physical addresses are [127.0.0.1:7901] 2010-04-13 17:13:36,474 4299 TRACE [org.infinispan.factories.GlobalComponentRegistry] (main:) Registering a shutdown hook. Configured behavior = DEFAULT 2010-04-13 17:13:36,474 4299 INFO [org.infinispan.factories.GlobalComponentRegistry] (main:) Infinispan version: Infinispan 'Starobrno' 4.1.0.SNAPSHOT 2010-04-13 17:13:36,474 4299 TRACE [org.infinispan.factories.GlobalComponentRegistry] (main:) Named component register, put org.infinispan.factories.ComponentRegistry@1de007d under ___hotRodTopologyCache in {}@b5ad68 3. Since topology caches are configured with fetch in memory state, when eq-54009 starts, it requests eq-11980 to generate state: 2010-04-13 17:13:36,501 4326 TRACE [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (STREAMING_STATE_TRANSFER-sender-1,Infinispan-Cluster,eq-11980:) Received request to generate state for cache named '___hotRodTopologyCache'. Attempting to generate state. 4. Now, let's send a put command to server in eq-11980 for brand new named cache 'hotRodReplSync' 2010-04-13 17:13:36,752 4577 TRACE [org.infinispan.server.hotrod.RequestResolver$] (HotRodWorker-1-1:) Operation code: 1 has been matched to Some(PutRequest) 2010-04-13 17:13:36,754 4579 TRACE [org.infinispan.server.hotrod.HotRodDecoder$] (HotRodWorker-1-1:) Decoded header HotRodHeader{op=PutRequest, messageId=1, cacheName=hotRodReplSync, flag=NoFlag, clientIntelligence=0, topologyId=0} 5. Now eq-11980 attempts to fetch state from eq-54009 for cache 'hotRodReplSync': 2010-04-13 17:13:36,790 4615 INFO [org.infinispan.remoting.rpc.RpcManagerImpl] (HotRodWorker-1-1:) Trying to fetch state from eq-54009 2010-04-13 17:13:36,792 4617 TRACE [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (Incoming-1,Infinispan-Cluster,eq-11980:) Received state for cache named 'hotRodReplSync'. Attempting to apply state. 2010-04-13 17:13:36,792 4617 TRACE [org.infinispan.factories.GlobalComponentRegistry] (Incoming-1,Infinispan-Cluster,eq-11980:) Named component register, get hotRodReplSync from {___hotRodTopologyCache=org.infinispan.factories.ComponentRegistry@1d6fbb3, hotRodReplSync=org.infinispan.factories.ComponentRegistry@19c5048}@ee6ad6 2010-04-13 17:13:36,792 4617 DEBUG [org.infinispan.statetransfer.StateTransferManagerImpl] (Incoming-1,Infinispan-Cluster,eq-11980:) Applying state 2010-04-13 17:13:36,792 4617 TRACE [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (STREAMING_STATE_TRANSFER-sender-1,Infinispan-Cluster,eq-54009:) Received request to generate state for cache named 'hotRodReplSync'. Attempting to generate state. 6. But eq-54009 does not have a 'hotRodReplSync' cache yet cos no requests have been sent to the 2nd (eq-54009) server yet and hence fails with: 2010-04-13 17:13:36,792 4617 INFO [org.infinispan.remoting.InboundInvocationHandlerImpl] (STREAMING_STATE_TRANSFER-sender-1,Infinispan-Cluster,eq-54009:) Cache named hotRodReplSync does not exist on this cache manager! 2010-04-13 17:13:36,794 4619 ERROR [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (STREAMING_STATE_TRANSFER-sender-1,Infinispan-Cluster,eq-54009:) Caught while responding to state transfer request org.infinispan.statetransfer.StateTransferException: Cache named hotRodReplSync does not exist on this cache manager! at org.infinispan.remoting.InboundInvocationHandlerImpl.getStateTransferManager(InboundInvocationHandlerImpl.java:85) at org.infinispan.remoting.InboundInvocationHandlerImpl.generateState(InboundInvocationHandlerImpl.java:77) at org.infinispan.remoting.transport.jgroups.JGroupsTransport.getState(JGroupsTransport.java:586) IMO, 6 is a valid case and should not throw an error. As you can see here, a server might not have had any requests for a cache yet, so might not have that cache started yet. The most reasonable thing for eq-54009 to do here is not to serve any state instead of throwing an error.