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    The socket has shut down its end of the socket before communication was complete. About half of those were because the program communicating on that socket had terminated. Check whether the application is still up and communicating via the socket. Broken pipe	at Method)	at	at	at	at	at$Writer.performIO(	at	at	at	at	at	at	at org.apache.hadoop.hdfs.server.datanode.BlockReceiver$PacketResponder.sendAckUpstreamUnprotected(	at org.apache.hadoop.hdfs.server.datanode.BlockReceiver$PacketResponder.sendAckUpstream(	at org.apache.hadoop.hdfs.server.datanode.BlockReceiver$	at