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From "Raju (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3734) TestFSEditLogLoader.testReplicationAdjusted() will hang if number of blocks are more than one
Date Wed, 01 Aug 2012 18:01:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13426783#comment-13426783
] 

Raju commented on HDFS-3734:
----------------------------

This is because of improper calculation of the blocksThreshold if I am not wrong
                
> 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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