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https://issues.apache.org/jira/browse/LUCENE-6499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14558788#comment-14558788
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Uwe Schindler commented on LUCENE-6499:
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bq. I am not super happy since we now sync on top of an IO operation but I
don't think there is a much easier solution unless we wanna use like an array
of locks and the hash of the path to lock on two stages
WindowsFS is for tests only, so I think this limitation is fine. With the
synchronization the "atomic" operation are really atomic (for the Lucene tests)
and that is all what counts. I am sure, you and Robert now can be hired by M$
to implement their filesystems! :-)
Just one question about the test: You are using a CyclicBarrier(2) here. Is
this just your own preference or is there a specific reason? Most tests like
this use a CountDownLatch(1) that is decremented by the child thread once its
ready so the main thread starts to fire it with some load. It's not some
critique, I never used CyclicBarrier, so it is just my own interest...
> WindowsFS misses to remove open file handle if file is concurrently deleted
> ---------------------------------------------------------------------------
>
> Key: LUCENE-6499
> URL: https://issues.apache.org/jira/browse/LUCENE-6499
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/test-framework
> Affects Versions: 5.1
> Reporter: Simon Willnauer
> Fix For: Trunk, 5.3
>
> Attachments: LUCENE-6499.patch, LUCENE-6499.patch
>
>
> WindowsFs has some race conditions when files are concurrently opened and
> deleted. A file might be successfully opened while concurrently deleted which
> should be prevented by the WindowsFS with an IOException / access denied. The
> problem is that we try to remove the leaked file handle form the internal map
> on close which fails since we fail to read the key from the filesystem since
> it has already been deleted. This manifests in subsequent `access denied`
> exceptions even though all streams on the file are closed.
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