David Smiley created LUCENE-9248:
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Summary: Change internal code names of postingsFormats to use 84
suffix
Key: LUCENE-9248
URL: https://issues.apache.org/jira/browse/LUCENE-9248
Project: Lucene - Core
Issue Type: Improvement
Components: core/codecs
Reporter: David Smiley
Assignee: David Smiley
Some postings formats write the postings differently as of Lucene 8.4 due to
changes -- LUCENE-9027 and LUCENE-9116. Blocktree was transitioned in a
backwards-compatible way but some (all?) others were not. Consequently an
attempt of the new version to read an old index will fail due to some
non-obvious error. I propose here using a simple version suffix on these
postings formats like "84" (thus "FST84" as one example). I see some already
use a suffix but were not bumped for 8.4. This is a really simple change and
doesn't address the problem of us not noticing future needs to version bump.
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