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https://issues.apache.org/jira/browse/SOLR-12295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gus Heck updated SOLR-12295:
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Attachment: SOLR-12295.patch
> Time Routed Aliases: Delete obsolete collections Async
> ------------------------------------------------------
>
> Key: SOLR-12295
> URL: https://issues.apache.org/jira/browse/SOLR-12295
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: UpdateRequestProcessors
> Reporter: Gus Heck
> Priority: Major
> Attachments: SOLR-12295.patch
>
>
> Presently TimeRoutedAliasUpdaateProcessor calls the MaintainRoutedAliasCmd
> command to handle the book keeping around creation of new and deletion of
> obsolete collections (the collections are representing time segments within
> the time routed alias). While we generally need to wait for collection
> creation before proceeding, since the incoming request may be placing a
> document in the collection to be created, deletions need only be initiated
> and do not need to impede processing of updates.
> In stress testing in SOLR-11949 the delays caused by synchronous updates were
> sufficient to fail the test via an apparent deadlock (actual locked threads
> could not be located however). With async deletes provided in this patch the
> stress test has passed for several consecutive executions.
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