Michael McCandless created LUCENE-4898:
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Summary: Allow DirectoryReader.openIfChanged to an IndexCommit
when reader is NRT
Key: LUCENE-4898
URL: https://issues.apache.org/jira/browse/LUCENE-4898
Project: Lucene - Core
Issue Type: Improvement
Reporter: Michael McCandless
Attachments: LUCENE-4898.patch
This throws an IllegalArRgumentException today, but it's easy to fix
with a small change to DirectoryReader. This is useful to do, if you
have an NRT reader and want to open a reader against a previous commit
point while sharing the SegmentReaders they have in common.
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