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From "Vinay (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5723) Append failed FINALIZED replica should not be accepted as valid when that block is underconstruction
Date Tue, 07 Jan 2014 04:35:50 GMT
Vinay created HDFS-5723:
---------------------------

             Summary: Append failed FINALIZED replica should not be accepted as valid when
that block is underconstruction
                 Key: HDFS-5723
                 URL: https://issues.apache.org/jira/browse/HDFS-5723
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
    Affects Versions: 2.2.0
            Reporter: Vinay


Scenario:
1. 3 node cluster with dfs.client.block.write.replace-datanode-on-failure.enable set to false.
2. One file is written with 3 replicas, blk_id_gs1
3. One of the datanode DN1 is down.
4. File was opened with append and some more data is added to the file and synced. (to only
2 live nodes DN2 and DN3)-- blk_id_gs2
5. Now  DN1 restarted
6. In this block report, DN1 reported FINALIZED block blk_id_gs1, this should be made marked
corrupted.
but since NN having appended block state as UnderConstruction, at this time its not detecting
this block as corrupt and adding to valid block locations.

As long as the namenode is alive, this datanode also will be considered as valid replica and
read/append will fail in that datanode.



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