[LUCENE-1030] "Read-only" IndexReaders

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Component/s: core/index
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Michael Busch
• Created: 17/Oct/07 18:32
• Updated: 28/Aug/22 11:41
• Resolved: 22/Sep/08 18:47

Description

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 http://www.gossamer-threads.com/lists/lucene/java-dev/52017.

Issue Links

• is related to: LUCENE-743 IndexReader.reopen()