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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3853) Port MiniDFSCluster enableManagedDfsDirsRedundancy option to branch-2
Date Sun, 26 Aug 2012 23:12:07 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins updated HDFS-3853:
------------------------------

    Description: 
MiniDFSCluster's enabledManagedDfsDirsRedunancy flag should be ported to branch-2.  Certain
tests rely on it to get full coverage-- for example,  {{TestNameNodeRecovery}} and {{TestFSEditLogLoader}}.

Just to give an example, if we're using redundant edit log directories, a test like this may
succeed for the wrong reasons:
1. screw up edit log directory
2. run recovery
3. test that we can start NN

With redundant edit log directories and edit log failover, step 1 is a no-op because we can
just fail over to the other directory.  So we're not really testing what we need to test.
 This was supposed to be ported over to branch-2 from trunk with the other stuff from HDFS-3049,
but was not.

  was:
enabledManagedDfsDirsRedunancy should be implemented in branch-2 like it is in trunk.  Certain
tests rely on it to get full coverage-- for example,  {{TestNameNodeRecovery}} and {{TestFSEditLogLoader}}.

Just to give an example, if we're using redundant edit log directories, a test like this may
succeed for the wrong reasons:
1. screw up edit log directory
2. run recovery
3. test that we can start NN

With redundant edit log directories and edit log failover, step 1 is a no-op because we can
just fail over to the other directory.  So we're not really testing what we need to test.
 This was supposed to be ported over to branch-2 from trunk with the other stuff from HDFS-3049,
but was not.

        Summary: Port MiniDFSCluster enableManagedDfsDirsRedundancy option to branch-2  (was:
port enableManagedDfsDirsRedundancy to branch-2)
    
> Port MiniDFSCluster enableManagedDfsDirsRedundancy option to branch-2
> ---------------------------------------------------------------------
>
>                 Key: HDFS-3853
>                 URL: https://issues.apache.org/jira/browse/HDFS-3853
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 2.2.0-alpha
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>            Priority: Minor
>         Attachments: HDFS-3049-b2.002.patch
>
>
> MiniDFSCluster's enabledManagedDfsDirsRedunancy flag should be ported to branch-2.  Certain
tests rely on it to get full coverage-- for example,  {{TestNameNodeRecovery}} and {{TestFSEditLogLoader}}.
> Just to give an example, if we're using redundant edit log directories, a test like this
may succeed for the wrong reasons:
> 1. screw up edit log directory
> 2. run recovery
> 3. test that we can start NN
> With redundant edit log directories and edit log failover, step 1 is a no-op because
we can just fail over to the other directory.  So we're not really testing what we need to
test.  This was supposed to be ported over to branch-2 from trunk with the other stuff from
HDFS-3049, but was not.

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