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https://issues.apache.org/jira/browse/VFS-536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14264680#comment-14264680
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Bernd Eckenfels commented on VFS-536:
-------------------------------------

Hm, I am not so deep into this thats why I havent yet had a look. I know there 
where some other FileWatcher bugs here, even some with pending patches. Could 
you maybe check if any of those help your problem? 

I am currently busy with finalizing the 2.1 release, but if anybody has a good 
tested patch for those (and this) issues, I would be happy to merge it before 
the release.

> DefaultFileMonitor will ignore files forever if directory is deleted and 
> recreated
> ----------------------------------------------------------------------------------
>
>                 Key: VFS-536
>                 URL: https://issues.apache.org/jira/browse/VFS-536
>             Project: Commons VFS
>          Issue Type: Bug
>    Affects Versions: 2.0
>            Reporter: Sam Halliday
>
> We're using VFS2 in our emacs scala ide 
> https://github.com/ensime/ensime-server
> Unfortunately, I've just discovered that if we watch a directory, e.g. here 
> we are watching the target directory for class files that are created by a 
> compiler
>  
> https://github.com/ensime/ensime-server/blob/master/src/main/scala/org/ensime/indexer/FileWatchers.scala#L28
> then if the directory is deleted and recreated (as is done by the SBT scala 
> build tool!) then monitoring events are ignored forever!
> I can confirm that file watching works fine if individual files are added or 
> removed.



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