add IndexWriter.removeUnferencedFiles, so apps can more immediately delete
index files when readers are closed
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Key: LUCENE-2259
URL: https://issues.apache.org/jira/browse/LUCENE-2259
Project: Lucene - Java
Issue Type: Improvement
Components: Index
Reporter: Michael McCandless
Assignee: Michael McCandless
Fix For: 3.1
This has come up several times on the user's list.
On Windows, which prevents deletion of still-open files, IndexWriter cannot
remove files that are in-use by open IndexReaders. This is fine, and
IndexWriter periodically retries the delete, but it doesn't retry very often
(only on open, on flushing a new segment, and on committing a merge). So it
lacks immediacy.
With this expert method, apps that want faster deletion can call this method.
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