[infinispan-issues] [JBoss JIRA] (ISPN-2005) Memcached server throwing UnknownOperationException with many clients

[Galder Zamarreño (JIRA)]

Galder Zamarreño created ISPN-2005:
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             Summary: Memcached server throwing UnknownOperationException with many clients
                 Key: ISPN-2005
                 URL: https://issues.jboss.org/browse/ISPN-2005
             Project: Infinispan
          Issue Type: Bug
          Components: Cache Server
    Affects Versions: 5.1.3.FINAL
            Reporter: Galder Zamarreño
            Assignee: Galder Zamarreño
             Fix For: 5.1.4.FINAL


With native memcached out of the box, I can execute such a test without any problems:
1000 clients (threads), 400 operations per thread, 34% writes

However, running Infinispan Memcached distribution with 1000 worker threads results in exceptions such as:

{code}2012-04-23 16:46:59,893 ERROR (MemcachedServerWorker-1-957) [org.infinispan.server.memcached.MemcachedDecoder] ISPN005003: Exception reported
org.infinispan.server.core.UnknownOperationException: Unknown operation: 
	at org.infinispan.server.memcached.RequestResolver$.toRequest(MemcachedDecoder.scala:659)
	at org.infinispan.server.memcached.MemcachedDecoder.readHeader(MemcachedDecoder.scala:73)
	at org.infinispan.server.core.AbstractProtocolDecoder.decodeHeader(AbstractProtocolDecoder.scala:92)
	at org.infinispan.server.core.AbstractProtocolDecoder.decode(AbstractProtocolDecoder.scala:69)
	at org.infinispan.server.core.AbstractProtocolDecoder.decode(AbstractProtocolDecoder.scala:45)
	at org.infinispan.server.core.transport.CustomReplayingDecoder.callDecode(CustomReplayingDecoder.java:250)
	at org.infinispan.server.core.transport.CustomReplayingDecoder.messageReceived(CustomReplayingDecoder.java:223)
	at org.infinispan.server.core.AbstractProtocolDecoder.messageReceived(AbstractProtocolDecoder.scala:360)
	at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:274)
	at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:261)
	at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:351)
	at org.jboss.netty.channel.socket.nio.NioWorker.processSelectedKeys(NioWorker.java:282)
	at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:202)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:680){code}

Client shows:

{code}2012-04-23 16:46:28.742 INFO net.spy.memcached.MemcachedConnection:  Reconnecting due to exception on {QA sa=/127.0.0.1:11211, #Rops=0, #Wops=0, #iq=0, topRop=null, topWop=null, toWrite=0, interested=0}
java.net.SocketException: Connection reset by peer
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
	at net.spy.memcached.MemcachedConnection.handleIO(MemcachedConnection.java:369)
	at net.spy.memcached.MemcachedConnection.handleIO(MemcachedConnection.java:242)
	at net.spy.memcached.MemcachedConnection.run(MemcachedConnection.java:833){code}

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