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From Shalin Shekhar Mangar <>
Subject Merging with writer open on source index?
Date Wed, 15 Jun 2011 11:38:07 GMT

IndexWriter.addIndexes(Directory...) method says that the index in each
directory must not be changed (opened by a writer) while this method is
running. However, IndexWriter.addIndexes(IndexReader...) does not say any
such thing. Would I be correct in assuming that since an IndexReader has a
static snapshot of the index, merging using addIndexes(IndexReader...) is
safe even if the source index has a writer open?

Shalin Shekhar Mangar.

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