GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/17863
[SPARK-20603][SS][Test]Set default number of topic partitions to 1 to
reduce the load
## What changes were proposed in this pull request?
I checked the logs of
https://amplab.cs.berkeley.edu/jenkins/job/spark-branch-2.2-test-maven-hadoop-2.7/47/
and found it took several seconds to create Kafka internal topic
`__consumer_offsets`. As Kafka creates this topic lazily, the topic creation
happens in the first test `deserialization of initial offset with Spark 2.1.0`
and causes it timeout.
This PR changes `offsets.topic.num.partitions` from the default value 50 to
1 to make creating `__consumer_offsets` much faster.
## How was this patch tested?
Jenkins
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zsxwing/spark fix-kafka-flaky-test
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17863.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 #17863
----
commit 83dfc74af487c24c40754d5ff811349130dbf791
Author: Shixiong Zhu <shixi...@databricks.com>
Date: 2017-05-04T21:14:31Z
Set default number of topic partitions to 1 to reduce the load
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