hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11708) Positional read will fail if replicas moved to different DNs after stream is opened
Date Fri, 02 Jun 2017 23:38:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16035632#comment-16035632

Konstantin Shvachko commented on HDFS-11708:

Latest patch HDFS-11708-07.patch is not applying cleanly to trunk. Something wrong with TestBlockReplacement.
Other versions seem to be good to go.

> 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-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)"

This message was sent by Atlassian JIRA

To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org

View raw message