Repository: spark
Updated Branches:
  refs/heads/master 41439fd52 -> bd5788287


[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` (50 partitions -> 1 partition) much 
faster.

## How was this patch tested?

Jenkins

Author: Shixiong Zhu <shixi...@databricks.com>

Closes #17863 from zsxwing/fix-kafka-flaky-test.


Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/bd578828
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/bd578828
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/bd578828

Branch: refs/heads/master
Commit: bd5788287957d8610a6d19c273b75bd4cdd2d166
Parents: 41439fd
Author: Shixiong Zhu <shixi...@databricks.com>
Authored: Fri May 5 11:08:26 2017 -0700
Committer: Shixiong Zhu <shixi...@databricks.com>
Committed: Fri May 5 11:08:26 2017 -0700

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 .../test/scala/org/apache/spark/sql/kafka010/KafkaTestUtils.scala   | 1 +
 1 file changed, 1 insertion(+)
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http://git-wip-us.apache.org/repos/asf/spark/blob/bd578828/external/kafka-0-10-sql/src/test/scala/org/apache/spark/sql/kafka010/KafkaTestUtils.scala
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diff --git 
a/external/kafka-0-10-sql/src/test/scala/org/apache/spark/sql/kafka010/KafkaTestUtils.scala
 
b/external/kafka-0-10-sql/src/test/scala/org/apache/spark/sql/kafka010/KafkaTestUtils.scala
index 2ce2760..f86b8f5 100644
--- 
a/external/kafka-0-10-sql/src/test/scala/org/apache/spark/sql/kafka010/KafkaTestUtils.scala
+++ 
b/external/kafka-0-10-sql/src/test/scala/org/apache/spark/sql/kafka010/KafkaTestUtils.scala
@@ -292,6 +292,7 @@ class KafkaTestUtils(withBrokerProps: Map[String, Object] = 
Map.empty) extends L
     props.put("log.flush.interval.messages", "1")
     props.put("replica.socket.timeout.ms", "1500")
     props.put("delete.topic.enable", "true")
+    props.put("offsets.topic.num.partitions", "1")
     props.putAll(withBrokerProps.asJava)
     props
   }


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