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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6803) Documenting DFSClient#DFSInputStream expectations reading and preading in concurrent context
Date Thu, 27 Nov 2014 14:24:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14227690#comment-14227690
] 

Hudson commented on HDFS-6803:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk #1946 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1946/])
HDFS-6803 Document DFSClient#DFSInputStream expectations reading and preading  in concurrent
context. (stack via stevel) (stevel: rev aa7dac335960950d2254a5a78bd1f0786a290538)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-common-project/hadoop-common/src/site/markdown/filesystem/fsdatainputstream.md


> Documenting DFSClient#DFSInputStream expectations reading and preading in concurrent
context
> --------------------------------------------------------------------------------------------
>
>                 Key: HDFS-6803
>                 URL: https://issues.apache.org/jira/browse/HDFS-6803
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>    Affects Versions: 2.4.1
>            Reporter: stack
>            Assignee: stack
>             Fix For: 2.7.0
>
>         Attachments: 9117.md.txt, DocumentingDFSClientDFSInputStream (1).pdf, DocumentingDFSClientDFSInputStream.v2.pdf,
HDFS-6803v2.txt, HDFS-6803v3.txt, fsdatainputstream.md.v3.html
>
>
> Reviews of the patch posted the parent task suggest that we be more explicit about how
DFSIS is expected to behave when being read by contending threads. It is also suggested that
presumptions made internally be made explicit documenting expectations.
> Before we put up a patch we've made a document of assertions we'd like to make into tenets
of DFSInputSteam.  If agreement, we'll attach to this issue a patch that weaves the assumptions
into DFSIS as javadoc and class comments. 



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