Robert Muir created SOLR-4764:
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Summary: When using NRT, just init the reader from IndexWriter
Key: SOLR-4764
URL: https://issues.apache.org/jira/browse/SOLR-4764
Project: Solr
Issue Type: Improvement
Reporter: Robert Muir
Spinoff from SOLR-4761
Solr first opens a DirectoryReader from the directory, then later will pass
this to IW openIfChanged.
I noticed this when i was confused that mergedsegmentwarmer doesn't appear to
work at first until after you've reopened...
I'm not totally sure what the current behavior causes (does IW's pool reuse
segments from this passed-in "external" reader, or is this causing some
horrible doubling-up/inefficient stuff etc?). To some extent i think we should
change it even if its actually performant: I think its confusing.
I think ideally we'd change IndexReaderFactory's method to take writer instead
of directory so that custom DirectoryReaders can still work.
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