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https://issues.apache.org/jira/browse/HADOOP-13739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15594638#comment-15594638
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VITALIY SAVCHENKO commented on HADOOP-13739:
--------------------------------------------

May be it possible to do for example open readers in merger with blocking files 
for write(or removing)?


> Add the ability to check - is a file opened for writing
> -------------------------------------------------------
>
>                 Key: HADOOP-13739
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13739
>             Project: Hadoop Common
>          Issue Type: New Feature
>            Reporter: VITALIY SAVCHENKO
>
> I want to merge some MapFile's to one via MapFile.Merger. But i want to be 
> sure, what no one of file not open for wrinting now.



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