Old message ID sent back when a server error is encountered

If the server fails with a server error (i.e. a suspicion), the decoder is not cleared correctly and so next requests end up with previous message ids:

2011/04/29 00:32:02:733 EDT [WARN ][Runner - 0] HOST perf01.mw.lab.eng.bos.redhat.com:rootProcess:E - Error sampling data: <org.infinispan.client.hotrod.exceptions.InvalidResponseException:: Invalid message id. Expected 2476 and received 2421>