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https://issues.apache.org/jira/browse/TAJO-1221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14234915#comment-14234915
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ASF GitHub Bot commented on TAJO-1221:
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GitHub user blrunner opened a pull request:
https://github.com/apache/tajo/pull/286
TAJO-1221: HA TajoClient should not connect TajoMaster at the first.
I added a method to update TableStats at CatalogStore. For reference, all
unit cases for physical operators verify output row numbers and it finished
successfully with my patch. So, I didn't implement unit test cases. In
addition, HCatalogStore::updateTableStats is dummy method. Because hive don't
provide no api to update table row numbers.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/blrunner/tajo TAJO-1221
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/tajo/pull/286.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #286
----
commit 9dc6cedce24a999c8f01fa701d4bc74e18642e28
Author: JaeHwa Jung <[email protected]>
Date: 2014-12-04T03:01:19Z
TAJO-1221: HA TajoClient should not connect TajoMaster at the first.
----
> HA TajoClient should not connect TajoMaster at the first.
> ---------------------------------------------------------
>
> Key: TAJO-1221
> URL: https://issues.apache.org/jira/browse/TAJO-1221
> Project: Tajo
> Issue Type: Improvement
> Components: tajo master
> Reporter: Hyunsik Choi
> Assignee: Jaehwa Jung
> Labels: failure-handling, fault-tolerance, high-availability
> Fix For: 0.9.1
>
>
> *Problem*
> We TajoClient is opened, TajoClient initially tries to connect TajoMaster.
> This manner does not guarantee high availability. A known TajoMaster host may
> be not work anymore. So, this manner still has some failure point.
> Also, this manner prohibits a Tajo cluster to run on some dynamic cluster
> environments like Yarn.
> *Solution*
> Tajo HA client should get directly TajoMaster addresses and others from HA
> component without contacting TajoMaster.
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