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via Google Groups by Unknown author, 1 year ago 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	at org.apache.spark.executor.Executor$	at java.util.concurrent.ThreadPoolExecutor.runWorker(	at java.util.concurrent.ThreadPoolExecutor$	at