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https://issues.apache.org/jira/browse/DRILL-4207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Abhishek Girish updated DRILL-4207:
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Attachment: drillbit.log.txt
> Queries appear to hang in scenarios when hive plugin is enabled
> ---------------------------------------------------------------
>
> Key: DRILL-4207
> URL: https://issues.apache.org/jira/browse/DRILL-4207
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization, Storage - Hive
> Affects Versions: 1.4.0, 1.5.0
> Reporter: Abhishek Girish
> Priority: Critical
> Attachments: drillbit.log.txt
>
>
> On a on-demand test environment, which brings up a Hadoop cluster with Drill,
> I observed that queries submitted to Drill appear to hang (but eventually do
> complete - after several minutes). This occurs frequently and can be
> reproduced.
> The web UI shows them to be in a PENDING state and additional queries cannot
> be submitted at that time (they too go into PENDING state). These queries
> also take a very long time to cancel. Basically the whole Drill setup is in a
> unusable state.
> Logs indicate that the query takes prolonged time in registering with the
> Hive metastore. It could be either the hive metastore hasn't come up
> completely or because Drill is having trouble communicating with Hive
> server. Log snippet attached.
> Disabling Hive helps avoid this issue.
> Since the queries being run are not related to Hive and do not need to use
> the Hive plugin, I'm not quite sure why Drill would need to connect to Hive
> in the first place. And if Drill does requires every query to register with
> storage plugins such as Hive, then there should possibly be a timeout if the
> query is unrelated to the plugin taking time to load/register.
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