I have several Spark Streaming applications running on Standalone mode in Spark 1.5. Spark is currently set up for dynamic resource allocation. The issue I am seeing is that I can have about 12 Spark Streaming Jobs running concurrently. Occasionally I would see more than half where to fail due to Stage cancelled because SparkContext was shut down. It would automatically restart as it runs on supervised mode. Attached is the screenshot of one of the jobs that failed. Anyone have any insight as to what is going on?