[jira] [Assigned] (HIVE-20040) JDBC: HTTP listen queue is 50 and SYNs are lost

["Gopal V (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-20040?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gopal V reassigned HIVE-20040:
------------------------------

    Assignee: Gopal V

> 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
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Major
>
> 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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