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https://issues.apache.org/jira/browse/HBASE-8337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13632467#comment-13632467
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Colin Patrick McCabe commented on HBASE-8337:
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It's good to have HDFS-347 merged into trunk. I hope that the merge into
branch-2 will not take too long. Regardless, I think the bottom line is that
HBase needs to have support for both new-style and old-style short-circuit
local reads, at least for a while. Even if we had HDFS-347 in branch-2 now,
you'd still need this support to test against branch-1, or test against a
Windows-based HDFS cluster.
> 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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