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https://issues.apache.org/jira/browse/SOLR-17926?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrzej Bialecki updated SOLR-17926:
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Attachment: SOLR-17926-using-NOW.patch
> Discount timeAllowed for all types of queries
> ---------------------------------------------
>
> Key: SOLR-17926
> URL: https://issues.apache.org/jira/browse/SOLR-17926
> Project: Solr
> Issue Type: Improvement
> Affects Versions: 9.9
> Reporter: Andrzej Bialecki
> Assignee: Andrzej Bialecki
> Priority: Major
> Attachments: SOLR-17926-using-NOW.patch
>
>
> Spin-off from SOLR-17869.
> Currently only {{TopGroupsShardRequestFactory}} subtracts the time already
> spent on local request processing from {{timeAllowed}} before sending shard
> requests.
> This is inconsistent and likely not optimal. Since {{timeAllowed}} tracks
> wall-clock time it makes sense to track the same starting point for all
> phases of distributed request processing and terminate processing early when
> the allowed time runs out, as compared to the original starting point.
> This is not the way it works now, though (except for this special case of
> grouping queries): the same time span is allocated to the query coordinator
> and to the shard requests where the processing starts later, which means that
> the coordinator may time out while waiting for responses even if all shard
> requests succeeded.
> [~dsmiley] suggested to use {{SolrRequestInfo.getNOW()}} instead, as the
> absolute starting point for both local and distributed requests, and compare
> {{timeAllowed}} to that starting point. However, this relies on correct time
> sync between nodes.
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