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Posted to issues-all@impala.apache.org by "ASF subversion and git services (Jira)" <ji...@apache.org> on 2020/06/19 21:16:00 UTC
[jira] [Commented] (IMPALA-8830) Coordinator-only queries get
queued when there are no executor groups
[ https://issues.apache.org/jira/browse/IMPALA-8830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17140838#comment-17140838 ]
ASF subversion and git services commented on IMPALA-8830:
---------------------------------------------------------
Commit 004e3c897e4890adb7d751b881b31ca71f5a533d in impala's branch refs/heads/master from Bikramjeet Vig
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=004e3c8 ]
IMPALA-8830: Fix executor group assignment of coordinator only queries
With this fix, coordinator only queries are submitted to a pseudo
executor group named "empty group (using coordinator only)" which
is empty. This allows running coordinator only queries regardless
of the presence of any healthy executor groups.
Testing:
Added a custom cluster test and modified tests that relied on
coordinator only queries to be queued in absence of executor groups.
Change-Id: I8fe098032744aa20bbbe4faddfc67e7a46ce03d5
Reviewed-on: http://gerrit.cloudera.org:8080/14183
Reviewed-by: Bikramjeet Vig <bi...@cloudera.com>
Tested-by: Impala Public Jenkins <im...@cloudera.com>
> Coordinator-only queries get queued when there are no executor groups
> ---------------------------------------------------------------------
>
> Key: IMPALA-8830
> URL: https://issues.apache.org/jira/browse/IMPALA-8830
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Affects Versions: Impala 3.3.0
> Reporter: Tim Armstrong
> Assignee: Bikramjeet Vig
> Priority: Blocker
> Labels: admission-control, resource-management
>
> Reproduction:
> {noformat}
> tarmstrong@tarmstrong-box:~/Impala/incubator-impala$ start-impala-cluster.py -s1 --use_exclusive_coordinators;
> [localhost:21000] default> select * from tpch.lineitem order by l_orderkey limit 5;
> ERROR: Admission for query exceeded timeout 60000ms in pool default-pool. Queued reason: No healthy executor groups found for pool default-pool.
> [localhost:21000] default> select 1;
> ERROR: Admission for query exceeded timeout 60000ms in pool default-pool. Queued reason: No healthy executor groups found for pool default-pool.
> {noformat}
> I expected that the second query should run immediately since it doesn't actually need to be scheduled on any executors. I suspect this may be a regression from the executor group changes, but didn't confirm.
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