Robert Muir created LUCENE-5228:
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Summary: IndexWriter.addIndexes copies raw files but acquires no
locks
Key: LUCENE-5228
URL: https://issues.apache.org/jira/browse/LUCENE-5228
Project: Lucene - Core
Issue Type: Bug
Reporter: Robert Muir
I see stuff like: "merge problem with lucene 3 and 4 indices" (from solr users
list), and cannot even think how to respond to these users because so many
things can go wrong with IndexWriter.addIndexes(Directory)
it currently has in its javadocs:
NOTE: the index in each Directory must not be changed (opened by a writer)
while this method is running. This method does not acquire a write lock in each
input Directory, so it is up to the caller to enforce this.
This method should be acquiring locks: its copying *RAW FILES*. Otherwise we
should remove it. If someone doesnt like that, or is mad because its 10ns
slower, they can use NoLockFactory.
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