GitHub user yonran opened a pull request:
https://github.com/apache/spark/pull/11728
[SPARK-13906] Ensure that there are at least 2 dispatcher threads.
## What changes were proposed in this pull request?
Force at least two dispatcher-event-loop threads. Since
SparkDeploySchedulerBackend (in AppClient) calls askWithRetry to
CoarseGrainedScheduler in the same process, there the driver needs at least two
dispatcher threads to prevent the dispatcher thread from hanging.
## How was this patch tested?
Manual.
Author: Yonathan Randolph <[email protected]>
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/yonran/spark SPARK-13906
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11728.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 #11728
----
commit 2e79d29148e5bccdf3591466e52a31b72d2aa721
Author: Yonathan Randolph <[email protected]>
Date: 2016-03-15T10:39:32Z
[SPARK-13906] Ensure that there are at least 2 dispatcher threads.
Force at least two dispatcher-event-loop threads. Since
SparkDeploySchedulerBackend (in AppClient) calls askWithRetry to
CoarseGrainedScheduler in the same process, there the driver needs at least two
dispatcher threads to prevent the dispatcher thread from hanging.
Manual.
Author: Yonathan Randolph <[email protected]>
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