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https://issues.apache.org/jira/browse/HBASE-8337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13641040#comment-13641040
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Andrew Purtell commented on HBASE-8337:
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Thanks [~ghelmling]. I pinged because you were the reporter on HBASE-3194.
bq. In general, running multiple RS's within a single process is not a typical
setup either.
That is true. :-) To clarify, I mean from the perspective of HDFS.
bq. Maybe I'm missing it in the discussion above, but why is this only a
problem with hadoop2 and not hadoop1? Is SCR not enabled by default in hadoop1?
This was what [~devaraj] was asking about above too.
> 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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