Simon Willnauer created LUCENE-8835:
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Summary: Respect file extension when listing files form
FileSwitchDirectory
Key: LUCENE-8835
URL: https://issues.apache.org/jira/browse/LUCENE-8835
Project: Lucene - Core
Issue Type: Bug
Reporter: Simon Willnauer
FileSwitchDirectory splits file actions between 2 directories based on file
extensions. The extensions are respected on write operations like delete or
create but ignored when we list the content of the directories. Until now we
only deduplicated the contents on Directory#listAll which can cause
inconsistencies and hard to debug errors due to double deletions in IndexWriter
is a file is pending delete in one of the directories but still shows up in the
directory listing form the other directory. This case can happen if both
directories point to the same underlying FS directory which is a common usecase
to split between mmap and noifs.
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