ReplicaCacheDatabase doesn't realise the connection is down (TEST11A)

The returned message 'ID:116-130.226.228.8(cf:c7:d4:d2:35:19)-45924-1323263619664: To TEST11A_COMMON_THE_REPOS ReplyTo TEST11A_COMMON_THIS_REPOS_CLIENT_130_226_228_8_HCS_HIGH Error: dk.netarkivet.common.exceptions.IOFailure: SQL error preparing statement SELECT COUNT(*) FROM file WHERE filename = ? args [500-1-20111207130333-00000-kb-test-har-002.kb.dk.arc]
SQLException trace:
SQL State:08006
Error Code:40000
java.sql.SQLNonTransientConnectionException: Insufficient data while reading from the network - expected a minimum of 6 bytes and received only 0 bytes.  The connection has been terminated.
	at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)
	at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
	at org.apache.derby.client.am.Connection.prepareStatement(Unknown Source)
	at com.mchange.v2.c3p0.impl.NewProxyConnection.prepareStatement(NewProxyConnection.java:213)
	at dk.netarkivet.common.utils.DBUtils.prepareStatement(DBUtils.java:243)
	at dk.netarkivet.common.utils.DBUtils.selectIntValue(DBUtils.java:111)
	at dk.netarkivet.archive.arcrepositoryadmin.ReplicaCacheDatabase.existsFileInDB(ReplicaCacheDatabase.java:639)
	at dk.netarkivet.archive.arcrepositoryadmin.DatabaseAdmin.hasEntry(DatabaseAdmin.java:109)
	at dk.netarkivet.archive.arcrepository.ArcRepository.store(ArcRepository.java:243)
	at dk.netarkivet.archive.arcrepository.distribute.ArcRepositoryServer.visit(ArcRepositoryServer.java:87)
	at dk.netarkivet.archive.arcrepository.distribute.StoreMessage.accept(StoreMessage.java:78)
	at dk.netarkivet.archive.distribute.ArchiveMessageHandler.onMessage(ArchiveMessageHandler.java:83)
	at com.sun.messaging.jmq.jmsclient.MessageConsumerImpl.deliverAndAcknowledge(MessageConsumerImpl.java:338)
	at com.sun.messaging.jmq.jmsclient.MessageConsumerImpl.onMessage(MessageConsumerImpl.java:273)
	at com.sun.messaging.jmq.jmsclient.SessionReader.deliver(SessionReader.java:113)
	at com.sun.messaging.jmq.jmsclient.ConsumerReader.run(ConsumerReader.java:186)
	at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.derby.client.am.DisconnectException: Insufficient data while reading from the network - expected a minimum of 6 bytes and received only 0 bytes.  The connection has been terminated.
	at org.apache.derby.client.net.Reply.fill(Unknown Source)
	at org.apache.derby.client.net.Reply.ensureALayerDataInBuffer(Unknown Source)
	at org.apache.derby.client.net.Reply.readDssHeader(Unknown Source)
	at org.apache.derby.client.net.Reply.startSameIdChainParse(Unknown Source)
	at org.apache.derby.client.net.NetStatementReply.readPrepareDescribeOutput(Unknown Source)
	at org.apache.derby.client.net.StatementReply.readPrepareDescribeOutput(Unknown Source)
	at org.apache.derby.client.net.NetStatement.readPrepareDescribeOutput_(Unknown Source)
	at org.apache.derby.client.am.Statement.readPrepareDescribeOutput(Unknown Source)
	at org.apache.derby.client.am.PreparedStatement.readPrepareDescribeInputOutput(Unknown Source)
	at org.apache.derby.client.am.PreparedStatement.flowPrepareDescribeInputOutput(Unknown Source)
	at org.apache.derby.client.am.PreparedStatement.prepare(Unknown Source)
	at org.apache.derby.client.am.Connection.prepareStatementX(Unknown Source)