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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8337) Investigate why disabling hadoop short circuit read is required to make recovery tests pass consistently under hadoop2
Date Wed, 24 Apr 2013 16:59:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13640651#comment-13640651
] 

Andrew Purtell commented on HBASE-8337:
---------------------------------------

I am no longer getting "foo mentioned you" notices from JIRA.

I don't know why the different users in MiniHBaseCluster. We have this in init():
{code}
      // manually add the regionservers as other users
      for (int i=0; i<nRegionNodes; i++) {
        Configuration rsConf = HBaseConfiguration.create(conf);
        User user = HBaseTestingUtility.getDifferentUser(rsConf,
            ".hfs."+index++);
        hbaseCluster.addRegionServer(rsConf, i, user);
      }
{code}
added in r1342856 (HBASE-3194 HBase should run on both secure and vanilla versions of Hadoop
0.20)
                
> Investigate why disabling hadoop short circuit read is required to make recovery tests
pass consistently under hadoop2
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-8337
>                 URL: https://issues.apache.org/jira/browse/HBASE-8337
>             Project: HBase
>          Issue Type: Sub-task
>          Components: hadoop2, test
>    Affects Versions: 0.98.0, 0.95.1
>            Reporter: Jonathan Hsieh
>            Priority: Critical
>             Fix For: 0.95.1
>
>
> HBASE-7636 makes some TestDistributedLogSplitting pass consistently by disabling hdfs
short circuit reads.  
> HBASE-8349 makes datanode node death recovery pass consistently by disabling hdfs short
circuit reads.
> This will likely require configuration modifications to fix and may have different fixes
for hadoop1, hadoop2 (HDFS-2246), and hadoop3 (HDFS-347)...

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