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From "Vinay (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3734) TestFSEditLogLoader.testReplicationAdjusted() will hang if number of blocks are more than one
Date Mon, 30 Jul 2012 09:04:33 GMT
Vinay created HDFS-3734:
---------------------------

             Summary: TestFSEditLogLoader.testReplicationAdjusted() will hang if number of
blocks are more than one
                 Key: HDFS-3734
                 URL: https://issues.apache.org/jira/browse/HDFS-3734
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.1.0-alpha, 3.0.0
            Reporter: Vinay


TestFSEditLogLoader.testReplicationAdjusted() which was added in HDFS-2003 will fail if number
of blocks before cluster restart are more than one.

Test Scenario:
--------------
1. Write a file with min replication as 1 and replication factor as 1.
2. Change the min replication to 2 and restart the cluster.

Expected: Min replication should be automatically reset on cluster restart by replicating
more blocks.

Currently, if the number of blocks before restart is only one, then on restart NN will not
enter safemode, hence replication will happen and satisfies min replication factor.

If initial blocks count is more than 1 which are having replication factor as 1, then on restart
NN will enter safemode and will never come out.





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