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https://issues.apache.org/jira/browse/KAFKA-1036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13816331#comment-13816331
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Timothy Chen commented on KAFKA-1036:
-------------------------------------

Hi Jay,

The code isn't doing any locking, but looks like in Windows if you don't close 
the writer there is still a pending file lock on the file itself in Windows 
looking via the file monitor.

That's why I needed to add a extra writer.close after the rename fails.

Tim

> Unable to rename replication offset checkpoint in windows
> ---------------------------------------------------------
>
>                 Key: KAFKA-1036
>                 URL: https://issues.apache.org/jira/browse/KAFKA-1036
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.8.1
>         Environment: windows
>            Reporter: Timothy Chen
>            Priority: Critical
>              Labels: windows
>             Fix For: 0.8.1
>
>
> Although there was a fix for checkpoint file renaming in windows that tries 
> to delete the existing checkpoint file if renamed failed, I'm still seeing 
> renaming errors on windows even though the destination file doesn't exist.
> A bit investigation shows that it wasn't able to rename the file since the 
> kafka jvm still holds a fie lock on the tmp file and wasn't able to rename 
> it. 
> Attaching a patch that calls a explict writer.close so it can release the 
> lock and can able to rename it.



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