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org.apache.spark.storage.BlockException: Block manager 
failed to return cached value for rdd_9_0!*	at org.apache.spark.CacheManager.putInBlockManager(CacheManager.scala:158)	at org.apache.spark.CacheManager.getOrCompute(CacheManager.scala:78)	at org.apache.spark.rdd.RDD.iterator(RDD.scala:268)	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)	at org.apache.spark.scheduler.Task.run(Task.scala:89)	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:227)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)