Exception: It appears that you are attempting to reference SparkContext from a broadcast variable, action, or transforamtion. SparkContext can only be used on the driver, not in code that it run on workers. For more information, see SPARK-5063. 比如以下几种情况 classTest(object):def__init...
For more information, see SPARK-5063. When a Spark Streaming job recovers from checkpoint, this exception will be hit if a reference to an RDD not defined by the streaming job is used in DStream operations. For more information, See SPARK-13758. 二,错误概述 Spark程序的大部分操作都是RDD...
AI代码解释 abstractclassRDD[T:ClassTag](@transientprivatevar_sc:SparkContext,@transientprivatevardeps:Seq[Dependency[_]])extendsSerializablewithLogging{if(classOf[RDD[_]].isAssignableFrom(elementClassTag.runtimeClass)){logWarning("Spark does not support nested RDDs (see SPARK-5063)")}defthis(@tran...
可能出现以下情况:\n(1)RDD转换和操作未由驱动程序调用,而是在其他转换中执行;例如,rdd1.map(x => rdd2.values.count() * x)是无效的,因为values转换和count操作无法在rdd1.map转换中执行。有关更多信息,请参阅SPARK-5063。\n(2)当Spark Streaming作业从检查点恢复时,在DStream操作中使用了非流作业定义的...
+ "broadcast the result (see SPARK-5063)") } val bc = env.broadcastManager.newBroadcast[T](value, isLocal) val callSite = getCallSite logInfo("Created broadcast " + + " from " + callSite.shortForm) cleaner.foreach(_.registerBroadcastForCleanup(bc)) ...
actions are NOT invoked by the driver, but inside of other transformations; for example, rdd1.map(x => rdd2.values.count() * x) is invalid because the values transformation and count action cannot be performed inside of the rdd1.map transformation. For more information, see SPARK-5063. ...
actions are NOT invoked by the driver, but inside of other transformations; for example, rdd1.map(x => rdd2.values.count() * x) is invalid because the values transformation and count action cannot be performed inside of the rdd1.map transformation. For more information, see SPARK-5063. ...
logWarning("Spark不支持嵌套RDD(请参见SPARK-5063)") } private def sc: SparkContext = { if (_sc == null) { throw new SparkException( "此RDD缺少SparkContext。可能出现以下情况:\n(1)RDD转换和操作未由驱动程序调用,而是在其他转换中执行;例如,rdd1.map(x => rdd2.values.count() * x)是无效...
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For more information, see SPARK-5063. 1 2 _pickle.PicklingError: Could not serialize object: Exception: It appears that you are attempting to reference SparkContext from a broadcast variable, action, or transformation. SparkContext can only be used on the driver, not in code that it run on...