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https://issues.apache.org/jira/browse/HDFS-4538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13602764#comment-13602764
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Colin Patrick McCabe commented on HDFS-4538:
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bq. I'm confused by the test case... it's a replica of the old
TestBlockReaderLocal, but it doesn't seem to verify that the local block reader
path was actually used.
We set {{disableTcpReadsForTesting}}, so if there was a fallback to the old
path, the test would fail.
> allow use of legacy blockreader
> -------------------------------
>
> Key: HDFS-4538
> URL: https://issues.apache.org/jira/browse/HDFS-4538
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, hdfs-client, performance
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-4538.001.patch, HDFS-4538.002.patch
>
>
> Some users might want to use the legacy block reader, because it is available
> on Windows, whereas the secure solution has not yet been implemented there.
> As described in the mailing list discussion, let's enable this.
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