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https://issues.apache.org/jira/browse/HBASE-8337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13639941#comment-13639941
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Devaraj Das commented on HBASE-8337:
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[~jmhsieh], not sure I fully got the conclusion here. Is the conclusion here
that we wait until a Hadoop release with HDFS-347 happens and then fix this
issue; disable SCR for the unit tests until then? Looking at your last comment,
it seems the problem won't happen in real deployments where all RegionServers
run as the same user and HDFS is configured to allow that user for SCR (which
is the most typical deployment scenario).
I am trying to see if we can move this out of the 0.95.x list.
> 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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