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https://issues.apache.org/jira/browse/LUCENE-10658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17572161#comment-17572161
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Vigya Sharma commented on LUCENE-10658:
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How about interrupting the merge threads when all merges are to be aborted,
like in a {{rollback()}} request?
This would at least work for the concurrent merge scheduler, where we track all
the active mergeThreads in a list, and can interrupt them, instead of waiting
for them to hit a checkAborted() call. We would still need aborted checks
though, to work with the sequential merge scheduler, but this could address a
significant number of use cases.
> Merges should periodically check for abort
> ------------------------------------------
>
> Key: LUCENE-10658
> URL: https://issues.apache.org/jira/browse/LUCENE-10658
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 9.3
> Reporter: Nhat Nguyen
> Priority: Major
>
> Rolling back an IndexWriter without committing shouldn't take long (i.e.,
> less than several seconds), and Elasticsearch cluster coordination [relies
> on|https://github.com/elastic/elasticsearch/issues/88055] this assumption. If
> some merges are taking place, the rollback can take several minutes as merges
> only check for abort when writing to files via
> [MergeRateLimiter|https://github.com/apache/lucene/blob/3d7d85f245381f84c46c766119695a8645cde2b8/lucene/core/src/java/org/apache/lucene/index/MergeRateLimiter.java#L117-L119].
> Merging a completion field, for example, can take a long time without
> touching output files. Another reason merges should periodically check for
> abort is its outputs will be discarded.
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