Github user ted-yu commented on the pull request:
https://github.com/apache/spark/pull/10325#issuecomment-165191304
```
org.apache.spark.streaming.JavaAPISuite.testStreamingContextTransform
Failing for the past 1 build (Since Failed#47817 )
Took 62 ms.
Error Message
org.apache.spark.SparkException: Only one SparkContext may be running in
this JVM (see SPARK-2243). To ignore this error, set
spark.driver.allowMultipleContexts = true. The currently running SparkContext
was created at:
org.apache.spark.SparkContext$.getOrCreate(SparkContext.scala:2287)
org.apache.spark.streaming.StreamingContext.<init>(StreamingContext.scala:140)
org.apache.spark.streaming.StreamingContext$$anonfun$getOrCreate$1.apply(StreamingContext.scala:869)
org.apache.spark.streaming.StreamingContext$$anonfun$getOrCreate$1.apply(StreamingContext.scala:869)
scala.Option.map(Option.scala:145)
org.apache.spark.streaming.StreamingContext$.getOrCreate(StreamingContext.scala:869)
org.apache.spark.streaming.MasterFailureTest$.runStreams(MasterFailureTest.scala:278)
org.apache.spark.streaming.MasterFailureTest$.testOperation(MasterFailureTest.scala:165)
```
I don't think the above is caused by this PR.
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