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java.lang.NullPointerException: 	at org.apache.hyracks.control.cc.dataset.DatasetDirectoryService.getNonNullDatasetJobRecord(DatasetDirectoryService.java:104)	at org.apache.hyracks.control.cc.dataset.DatasetDirectoryService.updatedRecords(DatasetDirectoryService.java:223)	at org.apache.hyracks.control.cc.dataset.DatasetDirectoryService.getResultPartitionLocations(DatasetDirectoryService.java:196)	at org.apache.hyracks.control.cc.work.GetResultPartitionLocationsWork$1.run(GetResultPartitionLocationsWork.java:59)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)