You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@kylin.apache.org by "Zhong Yanghong (JIRA)" <ji...@apache.org> on 2017/09/20 01:38:00 UTC
[jira] [Updated] (KYLIN-2881) Improve hbase coprocessor exception
handling at kylin server side
[ https://issues.apache.org/jira/browse/KYLIN-2881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zhong Yanghong updated KYLIN-2881:
----------------------------------
Description:
A query may need a bunch of hconnections to visit hbase. Anyone of them fails, the whole query should be interrupted, and all of the related hconnections should be released for future other queries despite that currently we cannot interrupt the threads at hbase coprocessor side.
To achieve this goal, there're still some improvements:
* If any exception found in {{ExpectedSizeIterator}}, all of other hconnection threads should be interrupted if possible.
* If any exception found in {{ExpectedSizeIterator}}, the callback of coprocessor call should be return early.
* When query timeout, stop putting data to the queue of {{ExpectedSizeIterator}}
was:
A query may need a bunch of hconnections to visit hbase. Anyone of them fails, the whole query should be interrupted, and all of the related hconnections should be released for future other queries despite that currently we cannot interrupt the threads at hbase coprocessor side.
To achieve this goal, there're still some improvements:
# If any exception found in {{ExpectedSizeIterator}}, all of other hconnection threads should be interrupted if possible.
# If any exception found in {{ExpectedSizeIterator}}, the callback of coprocessor call should be return early.
# When query timeout, stop putting data to the queue of {{ExpectedSizeIterator}}
> Improve hbase coprocessor exception handling at kylin server side
> ------------------------------------------------------------------
>
> Key: KYLIN-2881
> URL: https://issues.apache.org/jira/browse/KYLIN-2881
> Project: Kylin
> Issue Type: Improvement
> Components: Query Engine
> Affects Versions: v2.1.0
> Reporter: Zhong Yanghong
> Assignee: Zhong Yanghong
> Fix For: v2.2.0
>
>
> A query may need a bunch of hconnections to visit hbase. Anyone of them fails, the whole query should be interrupted, and all of the related hconnections should be released for future other queries despite that currently we cannot interrupt the threads at hbase coprocessor side.
> To achieve this goal, there're still some improvements:
> * If any exception found in {{ExpectedSizeIterator}}, all of other hconnection threads should be interrupted if possible.
> * If any exception found in {{ExpectedSizeIterator}}, the callback of coprocessor call should be return early.
> * When query timeout, stop putting data to the queue of {{ExpectedSizeIterator}}
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)