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https://issues.apache.org/jira/browse/HIVE-20040?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V updated HIVE-20040:
---------------------------
Labels: Branch3Candidate (was: )
> JDBC: HTTP listen queue is 50 and SYNs are lost
> -----------------------------------------------
>
> Key: HIVE-20040
> URL: https://issues.apache.org/jira/browse/HIVE-20040
> Project: Hive
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 3.0.0, 3.1.0
> Reporter: Gopal V
> Assignee: Gopal V
> Priority: Major
> Labels: Branch3Candidate
> Attachments: HIVE-20040.1.patch
>
>
> When testing with 5000 concurrent users, the JDBC HTTP port ends up
> overflowing on SYNs when the HS2 gc pauses.
> This is because each getQueryProgress request is an independent HTTP request,
> so unlike the BINARY mode, there are more connections being established &
> closed in HTTP mode.
> {code}
> LISTEN 0 50 *:10004 *:*
> {code}
> This turns into connection errors when enabling
> {{net.ipv4.tcp_abort_on_overflow=1}}, but the better approach is to enqueue
> the connections until the HS2 is done with its GC pause.
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