Data nodes cannot re-join the cluster once connection is lost
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Key: HADOOP-285
URL: http://issues.apache.org/jira/browse/HADOOP-285
Project: Hadoop
Type: Bug
Components: dfs
Versions: 0.3.0
Reporter: Konstantin Shvachko
A data node looses connection to a name node and then tries to offerService()
again.
HADOOP-270 changes force it to start dataXceiveServer, which is already started
and in this case
throws IllegalThreadStateException, which goes on in a loop, and never reaches
the heartbeat section.
So the data node never re-joins the cluster, while from the out side it looks
it's still running.
This is another reason why we see missing data, and don't see failed data nodes.
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