Nick Wellnhofer created LUCY-280:
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Summary: Test suite failures because of Windows file deletion
semantics
Key: LUCY-280
URL: https://issues.apache.org/jira/browse/LUCY-280
Project: Lucy
Issue Type: Bug
Components: Store
Affects Versions: 0.4.2
Reporter: Nick Wellnhofer
Priority: Minor
There are at least two tests that fail randomly on Windows due to non-POSIX
file deletion semantics. The problem is that Windows doesn't guarantee that a
file is deleted immediately if there's another open handle on the file. (I'm
still not sure what other processes open handles on random files. It might be
virus scanners, but there are also sources that claim that internal Windows
services like the Volume Shadow Copy Service are responsible.)
It's possible that only the test suite is affected but I'd prefer a global
solution to this problem. I think the best approach is to do something like
Cygwin: instead of deleting a file, move it to the recycle bin and set the
delete-on-close flag. Unfortunately, it's rather complicated to implement this
properly. See the [Cygwin source
code|https://github.com/mirror/cygwin/blob/master/winsup/cygwin/syscalls.cc],
functions {{unlink_nt}} and {{try_to_bin}}.
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