GitHub user SaintBacchus opened a pull request:
https://github.com/apache/spark/pull/7889
[SPARK-8839][SQL]High concurrence will also cause the `key not found` error
in HiveThriftServer2
This PR is related to [7239](https://github.com/apache/spark/pull/7239).
It's show in a high concurrence scenario.
When there are about 500 clients connecting to the server at the same time,
the method `onStatementStart` will be executed before `onSessionCreated` at
about 10% probability.
So it's better to add a wait for the session to build up.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/SaintBacchus/spark KeyNotFound
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/7889.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 #7889
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commit 25b3c1d568d7b99de956b9f310bb2fb846403fe1
Author: huangzhaowei <[email protected]>
Date: 2015-08-03T06:33:34Z
Resolved another reason for SPARK-8839
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