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https://issues.apache.org/jira/browse/VFS-487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14029153#comment-14029153
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Gary Gregory commented on VFS-487:
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Except that the patch does not apply cleanly in trunk.
> File creation events missed when deleted then re-created within poll delay
> --------------------------------------------------------------------------
>
> Key: VFS-487
> URL: https://issues.apache.org/jira/browse/VFS-487
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: 2.0
> Reporter: Sam Haldane
> Attachments: VFS-487.patch
>
>
> To reproduce:
> * create a file monitor and add a directory with at least one child file
> * set delay to 5 seconds and start the monitor
> * delete a child file, wait for monitor to detect deletion
> * re-create the child file within 5 seconds
> * creation event is not detected
> This is mainly due to this block being at the start of the main loop instead
> of the end:
> {code:java}
> while (!this.deleteStack.empty())
> {
> this.removeFile(this.deleteStack.pop());
> }
> {code}
> When this is executed the file is in the stack from the previous poll and the
> file has already been re-created. {{removeFile}} calls
> {{FileMonitorAgent#resetChildrenList}} which updates the children list for
> that agent (which will contain the newly created file), but doesn't update
> the monitor map. The subsequent call to {{FileMonitorAgent#check}} in the
> main loop then doesn't detect the new file.
> Moving the above block to the end of the main loop would prevent most
> occurrences of this issue, but the implementation is still racy.
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