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[SPARK-15869][Streaming]Fix a potential NPE in StreamingJobProgressListener.getBatchUIData #14443

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[SPARK-15869][Streaming]Fix a potential NPE in StreamingJobProgressListener.getBatchUIData #14443

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2 changes: 1 addition & 1 deletion streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingJobProgressListener.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -259,7 +259,7 @@ private[streaming] class StreamingJobProgressListener(ssc: StreamingContext)
// We use an Iterable rather than explicitly converting to a seq so that updates
// will propagate
val outputOpIdToSparkJobIds: Iterable[OutputOpIdAndSparkJobId] =
Option(batchTimeToOutputOpIdSparkJobIdPair.get(batchTime).asScala)
Option(batchTimeToOutputOpIdSparkJobIdPair.get(batchTime)).map(_.asScala)
.getOrElse(Seq.empty)
_batchUIData.outputOpIdSparkJobIdPairs = outputOpIdToSparkJobIds
}
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