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https://issues.apache.org/jira/browse/LUCENE-887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12535357
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Michael Busch commented on LUCENE-887:
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I think we can close this issue because we have a concurrent MergeScheduler now
and a close() method that can abort running merges:
{code:java}
/**
* Closes the index with or without waiting for currently
* running merges to finish. This is only meaningful when
* using a MergeScheduler that runs merges in background
* threads.
* @param waitForMerges if true, this call will block
* until all merges complete; else, it will abort all
* running merges and return right away
*/
public void close(boolean waitForMerges) throws CorruptIndexException,
IOException;
{code}
The only restriction is that an application that wants to be able to stop
merges immediately has to use a concurrent MergeScheduler, but I think this is
acceptable?
> Interruptible segment merges
> ----------------------------
>
> Key: LUCENE-887
> URL: https://issues.apache.org/jira/browse/LUCENE-887
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Index
> Reporter: Michael Busch
> Assignee: Michael Busch
> Priority: Minor
> Attachments: ExtendedIndexWriter.java
>
>
> Adds the ability to IndexWriter to interrupt an ongoing merge. This might be
> necessary when Lucene is e. g. running as a service and has to stop indexing
> within a certain period of time due to a shutdown request.
> A solution would be to add a new method shutdown() to IndexWriter which
> satisfies the following two requirements:
> - if a merge is happening, abort it
> - flush the buffered docs but do not trigger a merge
> See also discussions about this feature on java-dev:
> http://www.gossamer-threads.com/lists/lucene/java-dev/49008
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