Robert Muir created LUCENE-5570:
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Summary: FSDirectory's fsync() is lenient
Key: LUCENE-5570
URL: https://issues.apache.org/jira/browse/LUCENE-5570
Project: Lucene - Core
Issue Type: Bug
Components: core/store
Reporter: Robert Muir
This method has a lot of problems:
1. it tracks 'stale files' as it writes (this seems pointless), and only
actually fsyncs the intersection of that 'stale files' and the filenames passed
as argument to sync(). So any bogus names passed to sync() are just silently
ignored
2. if "something bad happens" (e.g. two indexwriters/dirs on the same path, or
some other shenanigans), and the file is actually in stale files, but was say
actually deleted on the filesystem, the underlying fsync() call will create a
new 0-byte file and fsync that.
In my opinion we should do none of this. we should throw exceptions when this
stuff is wrong.
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