Please see the description about xcievers at:
You can confirm that you have a xcievers problem by grepping the
datanode logs with the error message pasted in the last bullet point.
On Fri, Jul 9, 2010 at 1:10 PM, Raymond Jennings III
> Does anyone know what might be causing this error? I am using version
> 0.20.2 and it happens when I run bin/hadoop dfs -copyFromLocal ...
> 10/07/09 15:51:45 INFO hdfs.DFSClient: Exception in createBlockOutputStream
> java.io.IOException: Bad connect ack with firstBadLink 18.104.22.168:50010
> 10/07/09 15:51:45 INFO hdfs.DFSClient: Abandoning block