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From "dragon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10132) CLONE - DFSClient hang up when there are not sufficient DataNodes in EC cluster.
Date Tue, 15 Mar 2016 08:17:35 GMT
dragon created HDFS-10132:
-----------------------------

             Summary: CLONE - DFSClient hang up when there are not sufficient DataNodes in
EC cluster.
                 Key: HDFS-10132
                 URL: https://issues.apache.org/jira/browse/HDFS-10132
             Project: Hadoop HDFS
          Issue Type: Sub-task
    Affects Versions: HDFS-7285
            Reporter: dragon
            Assignee: Kai Sasaki


6-3 RS schema requires 9 data nodes at least to work properly. However when there are not
sufficient DataNodes in EC cluster, writing file fails because of NullPointerException. And
also client is hang up. 

{code}
java.lang.NullPointerException
        at org.apache.hadoop.hdfs.DataStreamer.nextBlockOutputStream(DataStreamer.java:1463)
        at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:591)
        at org.apache.hadoop.hdfs.StripedDataStreamer.run(StripedDataStreamer.java:49)
{code}
        
DFSClient should handle insufficient DN error properly just like replication blocks.



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