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https://issues.apache.org/jira/browse/HAWQ-1530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16241780#comment-16241780
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Yi Jin commented on HAWQ-1530:
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I will provide a fix very soon which possibly fix this issue .
> Illegally killing a JDBC select query causes locking problems
> -------------------------------------------------------------
>
> Key: HAWQ-1530
> URL: https://issues.apache.org/jira/browse/HAWQ-1530
> Project: Apache HAWQ
> Issue Type: Bug
> Components: Transaction
> Reporter: Grant Krieger
> Assignee: Radar Lei
>
> Hi,
> When you perform a long running select statement on 2 hawq tables (join) from
> JDBC and illegally kill the JDBC client (CTRL ALT DEL) before completion of
> the query the 2 tables remained locked even when the query completes on the
> server.
> The lock is visible via PG_locks. One cannot kill the query via SELECT
> pg_terminate_backend(393937). The only way to get rid of it is to kill -9
> from linux or restart hawq but this can kill other things as well.
> The JDBC client I am using is Aqua Data Studio.
> I can provide exact steps to reproduce if required
> Thank you
> Grant
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