Philippe Marschall created LUCENE-8617:
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Summary: FSDirectory tries to create MMapDirectory on non default
file system
Key: LUCENE-8617
URL: https://issues.apache.org/jira/browse/LUCENE-8617
Project: Lucene - Core
Issue Type: Bug
Components: core/store
Affects Versions: 5.0
Reporter: Philippe Marschall
`org.apache.lucene.store.FSDirectory.open(Path, LockFactory)` and
`org.apache.lucene.store.FSDirectory.open(Path)` always assume the path is
created on the default file system. If the path is not on the default file
system `MMapDirectory` is the wrong choice as only the default file system can
provide `mmap()`.
In case of a non default file system `SimpleFSDirectory` is a good choice.
See this bug for an example
https://github.com/marschall/memoryfilesystem/issues/113
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