[jira] [Commented] (HDFS-6633) Support reading new data in a being written file until the file is closed

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-6633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525001#comment-14525001 ] 

Hadoop QA commented on HDFS-6633:
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | patch |   0m  0s | The patch command could not apply the patch during dryrun. |
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|| Subsystem || Report/Notes ||
| Patch URL | http://issues.apache.org/jira/secure/attachment/12689437/HDFS-6633-003.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / f1a152c |
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/10688/console |


This message was automatically generated.

> Support reading new data in a being written file until the file is closed
> -------------------------------------------------------------------------
>
>                 Key: HDFS-6633
>                 URL: https://issues.apache.org/jira/browse/HDFS-6633
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: hdfs-client
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Vinayakumar B
>         Attachments: HDFS-6633-001.patch, HDFS-6633-002.patch, HDFS-6633-003.patch, h6633_20140707.patch, h6633_20140708.patch
>
>
> When a file is being written, the file length keeps increasing.  If the file is opened for read, the reader first gets the file length and then read only up to that length.  The reader will not be able to read the new data written afterward.
> We propose adding a new feature so that readers will be able to read all the data until the writer closes the file.



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