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From "Michael Busch (JIRA)" <>
Subject [jira] Created: (LUCENE-1030) "Read-only" IndexReaders
Date Wed, 17 Oct 2007 18:32:50 GMT
"Read-only" IndexReaders

                 Key: LUCENE-1030
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Index
            Reporter: Michael Busch
            Priority: Minor

IndexReaders are able to perform certain write operations on an index (setNorm(), deleteDocument()).
This makes issues like LUCENE-743 more complicated and also duplicate code for acquiring locks
and write transactions is necessary.

Therefore we should make IndexReaders "read-only" in the future. However, we have to find
a good solution to support setting norms and deleting documents by docid with the IndexWriter.
See related discussions in LUCENE-743 and

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