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From "Yulei Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13725) Open MapFile for append
Date Wed, 19 Oct 2016 07:07:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15587885#comment-15587885
] 

Yulei Li commented on HADOOP-13725:
-----------------------------------

Could you describe the problem more detailed? In the MapFile source code, I see it have append
method and before appending the method actually checks the new key. So how to reproduce your
problem? Thanks

> Open MapFile for append
> -----------------------
>
>                 Key: HADOOP-13725
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13725
>             Project: Hadoop Common
>          Issue Type: New Feature
>            Reporter: VITALIY SAVCHENKO
>
> I think it possible to open MapFile for appending.
> SequenceFile support it (Option SequenceFile.Writer.appendIfExists(true) HADOOP-7139)
> Now it almost working. But if use SequenceFile.Writer.appendIfExists(true) MapFile.Writer
- it not read last key and does not check new keys. That's why MapFile can be corrupted.



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