Michael McCandless created LUCENE-6353:
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Summary: Strengthen checks on allowed segment file names
Key: LUCENE-6353
URL: https://issues.apache.org/jira/browse/LUCENE-6353
Project: Lucene - Core
Issue Type: Bug
Reporter: Michael McCandless
Fix For: Trunk, 5.1
Replication layers that need to move Lucene indices around frequently need to
(or should) be able to decode an given index file into its segment name,
segment suffix (generation and/or per-field "suffix"), file name extension.
This is useful for robustness, e.g. copying all of a segment's files if any
checksums/ids across those files disagrees between source and replica.
But we don't do very strong checking of the "syntax" of an index file name
today, or at least we should do the TODO in SegmentWriteState (upgrade the
assert on the segment suffix to a real check).
I think we could also make MDW.close insist every file it finds in a closed
index either matches the required syntax, or is an "extra" added by ExtraFS?
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