It's undocumented. It's misspelled. And without it your (insert euphemism for "really big" here) Hadoop grid won't be able to crunch those multi-hundred gigabyte input files. It's the "xciever" setting for HDFS DataNode daemons, and the absence of it in your configuration is waiting to bite you in the butt.
raised java.io.EOFException, with a traceback flowing down into DFSClient.
< property >
< name >dfs.datanode.max.xcievers< /name >
< value >4096< /value >
< /property >
Finally, why is the default value for this setting so low? Why not have it default to a more reasonable value like 2048 or 4096 out of the box? Memory and CPU is cheap, chasing infrastructure issues is expensive.