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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11379) DFSInputStream may infinite loop requesting block locations
Date Fri, 03 Feb 2017 19:03:52 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15851952#comment-15851952
] 

Daryn Sharp commented on HDFS-11379:
------------------------------------

Test failure not related.

> DFSInputStream may infinite loop requesting block locations
> -----------------------------------------------------------
>
>                 Key: HDFS-11379
>                 URL: https://issues.apache.org/jira/browse/HDFS-11379
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 2.7.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: HDFS-11379.branch-2.patch, HDFS-11379.trunk.patch
>
>
> DFSInputStream creation caches file size and initial range of locations.  If the file
is truncated (or replaced) and the client attempts to read outside the initial range, the
client goes into a tight infinite looping requesting locations for the nonexistent range.



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