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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-285) Data nodes cannot re-join the cluster once connection is lost
Date Wed, 07 Jun 2006 08:27:29 GMT
Data nodes cannot re-join the cluster once connection is lost
-------------------------------------------------------------

         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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