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https://issues.apache.org/jira/browse/DRILL-5217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836762#comment-15836762
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Laurent Goujon commented on DRILL-5217:
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Are you suggesting to offset the notification to the client to a different
threadpool (or ioservice)?
> Heartbeat Fails when C++ client receives a large ResultSet
> ----------------------------------------------------------
>
> Key: DRILL-5217
> URL: https://issues.apache.org/jira/browse/DRILL-5217
> Project: Apache Drill
> Issue Type: Bug
> Components: Client - C++
> Reporter: Sudheesh Katkam
> Priority: Critical
>
> If the listener thread is occupied for longer than 15 seconds (heartbeat
> timeout) while [handling a message from the
> drillbit|https://github.com/apache/drill/blob/master/contrib/native/client/src/clientlib/drillClientImpl.cpp#L1286]
> e.g. [processing query data blocks if the query result listener's buffer is
> full|https://github.com/apache/drill/blob/master/contrib/native/client/src/clientlib/drillClientImpl.cpp#L899],
> heartbeats fail because the same thread is responsible for sending
> heartbeats!
> Fix is to [handle long running
> operations|http://stackoverflow.com/questions/17648725/long-running-blocking-operations-in-boost-asio-handlers]
> separately using boost asio.
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