I was able to resolve this issue. For posterity, it was an RMI issue. The host on which RMI was running was not using its FQDN in the RMI messages.
Since I'm using JBoss, I simply defined an additional JAVA_OPT of "-Djava.rmi.server.hostname=server1.this.domain.example.com". It worked great after that.
> --- On Tue, 3/10/09, Nathan Good
> <
nathanagood@...> wrote:
> From: Nathan Good <
nathanagood@...>
> Subject: [ehcache-list]
> net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator:
> java.rmi.UnknownHostException
> To:
ehcache-list@...
> Date: Tuesday, March 10, 2009, 7:09 AM
>
> I am attempting to set up a distributed cache between two
> servers and am
> getting an java.rmi.UnknownHostException (see stack trace
> in this e-mail). I
> have verified that using the short name the host is not
> resolvable from server2
> to server1, since they are in different domains. However,
> I am using the FQDN
> in the configuration files and have even used the IP
> addresses in the
> configuration files on both servers with the same results.
> It's as if the
> FQDN or IP address is being ignored and it's pulling
> the short name from
> somewhere.
>
> ehcache 1.5.0, manual peer discovery, running inside JBoss
> 5.0.0.GA
>
> The servers are NOT in each other's /etc/hosts file.
> The FQDNs of the
> servers are resolvable from each other, but only when given
> as a FQDN.
>
> I would really appreciate any suggestions anyone might
> have. Thank you!
>
>
> server1.this.domain.example.com -> messages sent
> successfully to
> server2.that.domain.example.com
> server2.that.domain.example.com -> says
> server1.this.domain.example.com is
> unknown
>
> Here is the stack trace from
> server2.that.domain.example.com:
>
> 2009-03-10 09:35:03,643 WARN
> [net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator]
> (Replication
> Thread) Unable to send message to remote peer. Message
> was: Unknown host:
> server1; nested exception is:
> java.net.UnknownHostException: server1
> java.rmi.UnknownHostException: Unknown host: server1;
> nested exception is:
> java.net.UnknownHostException: server1
> at
> sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:572)
> at
> sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
> at
> sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:171)
> at
> sun.rmi.server.UnicastRef.invoke(UnicastRef.java:94)
> at
> net.sf.ehcache.distribution.RMICachePeer_Stub.send(Unknown
> Source)
> at
> net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator.flushReplicationQueue(RMIAsynchronousCacheReplicator.java:309)
> at
> net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator.replicationThreadMain(RMIAsynchronousCacheReplicator.java:122)
> at
> net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator.access$100(RMIAsynchronousCacheReplicator.java:55)
> at
> net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator$ReplicationThread.run(RMIAsynchronousCacheReplicator.java:368)
> Caused by: java.net.UnknownHostException: server1
> at
> java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)
> at
> java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
> at java.net.Socket.connect(Socket.java:520)
> at java.net.Socket.connect(Socket.java:470)
> at java.net.Socket.<init>(Socket.java:367)
> at java.net.Socket.<init>(Socket.java:180)
> at
> sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
> at
> sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
> at
> net.sf.ehcache.distribution.ConfigurableRMIClientSocketFactory.createSocket(ConfigurableRMIClientSocketFactory.java:72)
> at
> sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:569)
> ... 8 more
>
> Here are the configuration files (I've changed the
> names of the server for
> security reasons):
>
> server1.this.domain.example.com config:
>
> <ehcache
> xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance"
>
> xsi:noNamespaceSchemaLocation="ehcache.xsd">
> <cacheManagerPeerProviderFactory class=
>
> "net.sf.ehcache.distribution.RMICacheManagerPeerProviderFactory"
>
> properties="peerDiscovery=manual,
> rmiUrls=//server2.that.domain.com:40000/cache1|//server2.that.domain.com:40000/cache2
> |//server2.that.domain.com:40000/cache3|//server2.that.domain.com:40000/cache4"
> propertySeparator=","
> />
>
> <cacheManagerPeerListenerFactory
>
> class="net.sf.ehcache.distribution.RMICacheManagerPeerListenerFactory"
> properties="hostName=, port=40000,
> socketTimeoutMillis=2000"/>
>
> <defaultCache
> maxElementsInMemory="10000"
> eternal="false"
> timeToIdleSeconds="120"
> timeToLiveSeconds="120"
> overflowToDisk="true"
> diskSpoolBufferSizeMB="30"
> maxElementsOnDisk="10000000"
> diskPersistent="false"
> diskExpiryThreadIntervalSeconds="120"
> memoryStoreEvictionPolicy="LRU"
> />
> <cache name="cache1"
> maxElementsInMemory="10000"
> maxElementsOnDisk="10000"
> eternal="true"
> overflowToDisk="true"
> memoryStoreEvictionPolicy="LRU"
> diskPersistent="true">
> <cacheEventListenerFactory
> class="com.ml.art.util.cache.ConfigurationEventListenerFactory"/>
> <cacheEventListenerFactory
>
> class="net.sf.ehcache.distribution.RMICacheReplicatorFactory"
> properties="replicateAsynchronously=true,
> replicatePuts=true,
> replicateUpdates=true,
> replicateUpdatesViaCopy=true,
> replicateRemovals=true "/>
> </cache>
> <!-- ... rest of caches ... -->
> </ehcache>
>
> File from server2.that.domain.example.com:
>
> <ehcache
> xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance"
>
> xsi:noNamespaceSchemaLocation="ehcache.xsd">
> <cacheManagerPeerProviderFactory class=
>
> "net.sf.ehcache.distribution.RMICacheManagerPeerProviderFactory"
>
> properties="peerDiscovery=manual,
> rmiUrls=//server1.this.domain.com:40000/cache1|//server1.this.domain.com:40000/cache2
> |//server1.this.domain.com:40000/cache3|//server1.this.domain.com:40000/cache4"
> propertySeparator=","
> />
>
> <cacheManagerPeerListenerFactory
>
> class="net.sf.ehcache.distribution.RMICacheManagerPeerListenerFactory"
> properties="hostName=, port=40000,
> socketTimeoutMillis=2000"/>
>
> <defaultCache
> maxElementsInMemory="10000"
> eternal="false"
> timeToIdleSeconds="120"
> timeToLiveSeconds="120"
> overflowToDisk="true"
> diskSpoolBufferSizeMB="30"
> maxElementsOnDisk="10000000"
> diskPersistent="false"
> diskExpiryThreadIntervalSeconds="120"
> memoryStoreEvictionPolicy="LRU"
> />
> <cache name="cache1"
> maxElementsInMemory="10000"
> maxElementsOnDisk="10000"
> eternal="true"
> overflowToDisk="true"
> memoryStoreEvictionPolicy="LRU"
> diskPersistent="true">
> <cacheEventListenerFactory
> class="com.ml.art.util.cache.ConfigurationEventListenerFactory"/>
> <cacheEventListenerFactory
>
> class="net.sf.ehcache.distribution.RMICacheReplicatorFactory"
> properties="replicateAsynchronously=true,
> replicatePuts=true,
> replicateUpdates=true,
> replicateUpdatesViaCopy=true,
> replicateRemovals=true "/>
> </cache>
> <!-- ... rest of caches ... -->
> </ehcache>
>
>
>
>
>
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