10:40 a.m.
State transfer requests for non existing caches should not throw exception
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Key: ISPN-399
URL: https://jira.jboss.org/jira/browse/ISPN-399
Project: Infinispan
Issue Type: Bug
Components: State transfer
Affects Versions: 4.1.0.ALPHA2
Reporter: Galder Zamarreno
Assignee: Galder Zamarreno
Fix For: 4.1.0.BETA1
Attachments: infinispan.log
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.
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