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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-1794) Add tests that flex Hadoop 2 features
Date Sat, 07 Dec 2013 04:02:36 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-1794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13842058#comment-13842058
] 

Josh Elser commented on ACCUMULO-1794:
--------------------------------------

Just applied locally and did a little bit of testing on 1.5.1 -- Overall looks good to me,
but I did think of a couple of things that I'd like to see eventually (or at least get some
feedback on the ideas).

# Alternate between using haadmin and {{kill -9}}'ing the Namenode. We shouldn't see a difference
here, but it would be nice to test coordinated failover and automatic failover
# Some more validation before anything else: Can the user sudo to the hdfs admin user as they
claim? Do the executables (hdfs, sudo) exist? Does the namespace provided exist (or can we
find any namespaces if we're using all of them)? Can we find namenodes for the namespaces
configured?

The only other thing I'm curious about is when the script tries to choose an random namenode
to make active, could we ever get in that block while ZFKC is in the middle of transition?
In other words, is it possible to have no active namenodes while automatic failover is happening
and we get an error because we try to force the transition?

> Add tests that flex Hadoop 2 features
> -------------------------------------
>
>                 Key: ACCUMULO-1794
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1794
>             Project: Accumulo
>          Issue Type: Sub-task
>    Affects Versions: 1.4.4, 1.5.0
>            Reporter: Sean Busbey
>            Assignee: Sean Busbey
>         Attachments: ACCUMULO-1794.1.patch.txt, ACCUMULO-1794.2.patch.txt
>
>
> specifically make sure DFS clients behavior properly in the presence of HDFS HA failover.



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