(merge into master, thanks for the quick fix Pete).

2015-09-04 15:58 GMT-07:00 Cheolsoo Park <piaozhexiu@gmail.com>:
Thank you Pete!

On Fri, Sep 4, 2015 at 1:40 PM, Pete Robbins <robbinspg@gmail.com> wrote:

On 4 September 2015 at 21:24, Pete Robbins <robbinspg@gmail.com> wrote:
I've also just hit this and was about to raise a JIRA for this if there isn't one already. I have a simple fix.

On 4 September 2015 at 19:09, Cheolsoo Park <piaozhexiu@gmail.com> wrote:
Hi devs,

I noticed this test case fails intermittently in Jenkins.

For eg, see the following builds-

The test failed in different PRs, and the failure looks unrelated to changes in the PRs. Looks like the test was added by the following commit-

commit 80e2568b25780a7094199239da8ad6cfb6efc9f7
Author: Imran Rashid <irashid@cloudera.com>
Date:   Mon Jul 20 10:28:32 2015 -0700
    [SPARK-8103][core] DAGScheduler should not submit multiple concurrent attempts for a stag