GitHub user paul-rogers opened a pull request:
https://github.com/apache/drill/pull/564
DRILL-4836: ZK Issue during Drillbit startup, possibly due to race condition
ZK Issue during Drillbit startup, possibly due to race condition.
A change made in February created a race condition if two Drillbits
attempt to create the same storage plugin node at the same time.
Revised the code to eliminate the race condition by relying on an
exception to detect that the node already exists.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/paul-rogers/drill DRILL-4836
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/564.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 #564
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commit 14d8d0e179419e86d86250eae0b7ae0254162ea7
Author: Paul Rogers <prog...@maprtech.com>
Date: 2016-08-09T03:16:59Z
DRILL-4836
ZK Issue during Drillbit startup, possibly due to race condition.
A change made in February created a race condition if two Drillbits
attempt to create the same storage plugin node at the same time.
Revised the code to eliminate the race condition by relying on an
exception to detect that the node already exists.
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