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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-1951) Null pointer exception comes when Namenode recovery happens and there is no response from client to NN more than the hardlimit for NN recovery and the current block is more than the prev block size in NN
Date Tue, 17 May 2011 13:02:47 GMT
Null pointer exception comes when Namenode recovery happens and there is no response from client
to NN more than the hardlimit for NN recovery and the current block is more than the prev
block size in NN 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

                 Key: HDFS-1951
                 URL: https://issues.apache.org/jira/browse/HDFS-1951
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 0.20-append
            Reporter: ramkrishna.s.vasudevan
             Fix For: 0.20-append


Null pointer exception comes when Namenode recovery happens and there is no response from
client to NN more than the hardlimit for NN recovery and the current block is more than the
prev block size in NN 
1. Write using a client to 2 datanodes
2. Kill one data node and allow pipeline recovery.
3. write somemore data to the same block
4. Parallely allow the namenode recovery to happen
Null pointer exception will come in addStoreBlock api.


 



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