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https://issues.apache.org/jira/browse/HDFS-11708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16038221#comment-16038221
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Vinayakumar B commented on HDFS-11708:
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Jenkins says v07 patch for trunk applies cleanly as well.
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Confirming git environment
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HEAD is now at 66c6fd8 HADOOP-14431. ModifyTime of FileStatus returned by
SFTPFileSystem's getFileStatus method is wrong. Contributed by Hongyuan Li.
Previous HEAD position was 66c6fd8... HADOOP-14431. ModifyTime of FileStatus
returned by SFTPFileSystem's getFileStatus method is wrong. Contributed by
Hongyuan Li.
Switched to branch 'trunk'
Your branch is behind 'origin/trunk' by 1 commit, and can be fast-forwarded.
(use "git pull" to update your local branch)
First, rewinding head to replay your work on top of it...
Fast-forwarded trunk to 66c6fd831497944f4f49c5ce42c69a302b7d7bc0.
Already on 'trunk'
Your branch is up-to-date with 'origin/trunk'.
Current branch trunk is up to date.
Testing HDFS-11708 patch on trunk.
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Re-execing under Docker
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> Positional read will fail if replicas moved to different DNs after stream is
> opened
> -----------------------------------------------------------------------------------
>
> Key: HDFS-11708
> URL: https://issues.apache.org/jira/browse/HDFS-11708
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 2.7.3
> Reporter: Vinayakumar B
> Assignee: Vinayakumar B
> Priority: Critical
> Labels: release-blocker
> Attachments: HDFS-11708-01.patch, HDFS-11708-02.patch,
> HDFS-11708-03.patch, HDFS-11708-04.patch, HDFS-11708-05.patch,
> HDFS-11708-07.patch, HDFS-11708-07.patch, HDFS-11708-branch-2-07.patch,
> HDFS-11708-branch-2.7-07.patch, HDFS-11708-branch-2.8-07.patch,
> HDFS-11708-HDFS-11898-06.patch
>
>
> Scenario:
> 1. File was written to DN1, DN2 with RF=2
> 2. File stream opened to read and kept. Block Locations are [DN1,DN2]
> 3. One of the replica (DN2) moved to another datanode (DN3) due to datanode
> dead/balancing/etc.
> 4. Latest block locations in NameNode will be DN1 and DN3 in the 'same order'
> 5. DN1 went down, but not yet detected as dead in NameNode.
> 6. Client start reading using positional read api "read(pos, buf[], offset,
> length)"
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