server becomes non responsive after a failed connection attempt to the db

[abmargb]

org.postgresql.util.PSQLException: The connection attempt failed.
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:150)
        at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
        at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125)
        at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
        at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:22)
        at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:30)
        at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
        at org.postgresql.Driver.makeConnection(Driver.java:393)
        at org.postgresql.Driver.connect(Driver.java:267)
        at java.sql.DriverManager.getConnection(DriverManager.java:571)
        at java.sql.DriverManager.getConnection(DriverManager.java:233)
        at org.buddycloud.channelserver.db.JDBCConnectionFactory.getConnection(JDBCConnectionFactory.java:19)
        at org.buddycloud.channelserver.db.DefaultNodeStoreFactoryImpl.create(DefaultNodeStoreFactoryImpl.java:35)
        at org.buddycloud.channelserver.channel.ChannelManagerFactoryImpl.create(ChannelManagerFactoryImpl.java:15)
        at org.buddycloud.channelserver.queue.InQueueConsumer.consume(InQueueConsumer.java:48)
        at org.buddycloud.channelserver.queue.QueueConsumer$1.run(QueueConsumer.java:29)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.EOFException
        at org.postgresql.core.PGStream.ReceiveChar(PGStream.java:276)
        at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:269)
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:108)
        ... 20 more
2015-01-28 21:04:28,236 [pool-7-thread-1] DEBUG org.buddycloud.channelserver.packetprocessor.iq.IQProcessor - Finding IQ processor for namespace http://jabber.org/protocol/disco#info
2015-01-28 21:04:28,236 [pool-7-thread-1] INFO  org.buddycloud.channelserver.packetprocessor.iq.namespace.AbstractNamespace - Using processor for packet type: get
2015-01-28 21:07:58,611 [pool-7-thread-1] ERROR org.buddycloud.channelserver.packetprocessor.iq.IQProcessor - Error while processing packet.
java.lang.NullPointerException
        at org.buddycloud.channelserver.channel.ChannelManagerImpl.isCachedNode(ChannelManagerImpl.java:160)
        at org.buddycloud.channelserver.packetprocessor.iq.namespace.discoinfo.DiscoInfoGet.process(DiscoInfoGet.java:57)
        at org.buddycloud.channelserver.packetprocessor.iq.namespace.discoinfo.DiscoInfoGet.process(DiscoInfoGet.java:25)
        at org.buddycloud.channelserver.packetprocessor.iq.namespace.AbstractNamespace.process(AbstractNamespace.java:61)
        at org.buddycloud.channelserver.packetprocessor.iq.namespace.AbstractNamespace.process(AbstractNamespace.java:14)
        at org.buddycloud.channelserver.packetprocessor.iq.IQProcessor.processPacket(IQProcessor.java:75)
        at org.buddycloud.channelserver.packetprocessor.iq.IQProcessor.process(IQProcessor.java:51)
        at org.buddycloud.channelserver.queue.InQueueConsumer.consume(InQueueConsumer.java:50)
        at org.buddycloud.channelserver.queue.QueueConsumer$1.run(QueueConsumer.java:29)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)