Robert Muir created LUCENE-4790:
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Summary: FieldCache.getDocTermOrds back to the future bug
Key: LUCENE-4790
URL: https://issues.apache.org/jira/browse/LUCENE-4790
Project: Lucene - Core
Issue Type: Bug
Reporter: Robert Muir
Found while working on LUCENE-4765:
FieldCache.getDocTermOrds unsafely "bakes in" liveDocs into its structure.
This means in cases if you have readers at two points in time (r1, r2), and you
happen to call getDocTermOrds first on r2, then call it on r1, the results will
be incorrect.
Simple fix is to make DocTermOrds uninvert take liveDocs explicitly:
FieldCacheImpl always passes null, Solr's UninvertedField just keeps doing what
its doing today (since its a top-level reader, and cached somewhere else).
Also DocTermOrds had a telescoping ctor that was uninverting twice.
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