在
IDEA下开发Spark程序会遇到Lambda异常,下面演示异常及解决方案。
例子
import org.apache.spark.SparkConf;import org.apache.spark.api.java.JavaRDD;import org.apache.spark.api.java.JavaSparkContext;import org.apache.spark.api.java.function.Function;public class SimpleApp { public static void main(String[] args) {
String logFile = "/soft/dounine/github/spark-learn/README.md"; // Should be some file on your system
SparkConf sparkConf = new SparkConf()
.setMaster("spark://localhost:7077")
.setAppName("Demo");
JavaSparkContext sc = new JavaSparkContext(sparkConf);
JavaRDD<String> logData = sc.textFile(logFile).cache(); long numAs = logData.filter(s -> s.contains("a")).count(); long numBs = logData.map(new Function<String, Integer>() { @Override
public Integer call(String v1) throws Exception { return 1;
}
}).reduce((a,b)->a+b);
System.out.println("Lines with a: " + numAs + ", lines with b: " + numBs);
sc.stop();
}
}由于使用jdk1.8的lambda表达式，会有如下异常
18/08/06 15:18:41 WARN TaskSetManager: Lost task 0.0 in stage 0.0 (TID 0, 192.168.0.107, executor 0): java.lang.ClassCastException: cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1 at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2233) at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1405) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2290) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:430) at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:75) at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:114) at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:80) at org.apache.spark.scheduler.Task.run(Task.scala:109) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:345) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) 18/08/06 15:18:41 INFO TaskSetManager: Lost task 1.0 in stage 0.0 (TID 1) on 192.168.0.107, executor 0: java.lang.ClassCastException (cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1) [duplicate 1] 18/08/06 15:18:41 INFO TaskSetManager: Starting task 1.1 in stage 0.0 (TID 2, 192.168.0.107, executor 0, partition 1, PROCESS_LOCAL, 7898 bytes) 18/08/06 15:18:41 INFO TaskSetManager: Starting task 0.1 in stage 0.0 (TID 3, 192.168.0.107, executor 0, partition 0, PROCESS_LOCAL, 7898 bytes) 18/08/06 15:18:41 INFO TaskSetManager: Lost task 1.1 in stage 0.0 (TID 2) on 192.168.0.107, executor 0: java.lang.ClassCastException (cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1) [duplicate 2] 18/08/06 15:18:41 INFO TaskSetManager: Starting task 1.2 in stage 0.0 (TID 4, 192.168.0.107, executor 0, partition 1, PROCESS_LOCAL, 7898 bytes) 18/08/06 15:18:41 INFO TaskSetManager: Lost task 0.1 in stage 0.0 (TID 3) on 192.168.0.107, executor 0: java.lang.ClassCastException (cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1) [duplicate 3] 18/08/06 15:18:41 INFO TaskSetManager: Starting task 0.2 in stage 0.0 (TID 5, 192.168.0.107, executor 0, partition 0, PROCESS_LOCAL, 7898 bytes) 18/08/06 15:18:41 INFO TaskSetManager: Lost task 0.2 in stage 0.0 (TID 5) on 192.168.0.107, executor 0: java.lang.ClassCastException (cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1) [duplicate 4] 18/08/06 15:18:41 INFO TaskSetManager: Starting task 0.3 in stage 0.0 (TID 6, 192.168.0.107, executor 0, partition 0, PROCESS_LOCAL, 7898 bytes) 18/08/06 15:18:41 INFO TaskSetManager: Lost task 1.2 in stage 0.0 (TID 4) on 192.168.0.107, executor 0: java.lang.ClassCastException (cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1) [duplicate 5] 18/08/06 15:18:41 INFO TaskSetManager: Starting task 1.3 in stage 0.0 (TID 7, 192.168.0.107, executor 0, partition 1, PROCESS_LOCAL, 7898 bytes) 18/08/06 15:18:41 INFO TaskSetManager: Lost task 0.3 in stage 0.0 (TID 6) on 192.168.0.107, executor 0: java.lang.ClassCastException (cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1) [duplicate 6] 18/08/06 15:18:41 ERROR TaskSetManager: Task 0 in stage 0.0 failed 4 times; aborting job 18/08/06 15:18:41 INFO TaskSetManager: Lost task 1.3 in stage 0.0 (TID 7) on 192.168.0.107, executor 0: java.lang.ClassCastException (cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1) [duplicate 7] 18/08/06 15:18:41 INFO TaskSchedulerImpl: Removed TaskSet 0.0, whose tasks have all completed, from pool 18/08/06 15:18:41 INFO TaskSchedulerImpl: Cancelling stage 0 18/08/06 15:18:41 INFO DAGScheduler: ResultStage 0 (count at SimpleApp.java:19) failed in 1.113 s due to Job aborted due to stage failure: Task 0 in stage 0.0 failed 4 times, most recent failure: Lost task 0.3 in stage 0.0 (TID 6, 192.168.0.107, executor 0): java.lang.ClassCastException: cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1 at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2233) at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1405) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2290) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:430) at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:75) at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:114) at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:80) at org.apache.spark.scheduler.Task.run(Task.scala:109) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:345) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Driver stacktrace: 18/08/06 15:18:41 INFO DAGScheduler: Job 0 failed: count at SimpleApp.java:19, took 1.138497 s Exception in thread "main" org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 0.0 failed 4 times, most recent failure: Lost task 0.3 in stage 0.0 (TID 6, 192.168.0.107, executor 0): java.lang.ClassCastException: cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1 at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2233) at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1405) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2290) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:430) at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:75) at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:114) at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:80) at org.apache.spark.scheduler.Task.run(Task.scala:109) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:345) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Driver stacktrace: at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1602) at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1590) at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1589) at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48) at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1589) at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:831) at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:831) at scala.Option.foreach(Option.scala:257) at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:831) at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1823) at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1772) at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1761) at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:642) at org.apache.spark.SparkContext.runJob(SparkContext.scala:2034) at org.apache.spark.SparkContext.runJob(SparkContext.scala:2055) at org.apache.spark.SparkContext.runJob(SparkContext.scala:2074) at org.apache.spark.SparkContext.runJob(SparkContext.scala:2099) at org.apache.spark.rdd.RDD.count(RDD.scala:1162) at org.apache.spark.api.java.JavaRDDLike$class.count(JavaRDDLike.scala:455) at org.apache.spark.api.java.AbstractJavaRDDLike.count(JavaRDDLike.scala:45) at com.dounine.spark.learn.SimpleApp.main(SimpleApp.java:19) Caused by: java.lang.ClassCastException: cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaRDD$$anonfun$filter$1.f$1 of type org.apache.spark.api.java.function.Function in instance of org.apache.spark.api.java.JavaRDD$$anonfun$filter$1 at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2233) at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1405) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2290) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2284) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2208) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2066) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1570) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:430) at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:75) at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:114) at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:80) at org.apache.spark.scheduler.Task.run(Task.scala:109) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:345) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) 18/08/06 15:18:41 INFO SparkContext: Invoking stop() from shutdown hook 18/08/06 15:18:41 INFO SparkUI: Stopped Spark web UI at http://lake.dounine.com:4040 18/08/06 15:18:41 INFO StandaloneSchedulerBackend: Shutting down all executors 18/08/06 15:18:41 INFO CoarseGrainedSchedulerBackend$DriverEndpoint: Asking each executor to shut down 18/08/06 15:18:41 INFO MapOutputTrackerMasterEndpoint: MapOutputTrackerMasterEndpoint stopped! 18/08/06 15:18:41 INFO MemoryStore: MemoryStore cleared 18/08/06 15:18:41 INFO BlockManager: BlockManager stopped 18/08/06 15:18:41 INFO BlockManagerMaster: BlockManagerMaster stopped 18/08/06 15:18:41 INFO OutputCommitCoordinator$OutputCommitCoordinatorEndpoint: OutputCommitCoordinator stopped! 18/08/06 15:18:41 INFO SparkContext: Successfully stopped SparkContext 18/08/06 15:18:41 INFO ShutdownHookManager: Shutdown hook called 18/08/06 15:18:41 INFO ShutdownHookManager: Deleting directory /tmp/spark-cf16df6e-fd04-4d17-8b6a-a6252793d0d5
是因为jar包没有分发到Worker中。
解决方案(一)
添加Jar包位置路径
SparkConf sparkConf = new SparkConf()
.setMaster("spark://lake.dounine.com:7077")
.setJars(new String[]{"/soft/dounine/github/spark-learn/build/libs/spark-learn-1.0-SNAPSHOT.jar"})
.setAppName("Demo");解决方案(二)
使用本地开发模式
SparkConf sparkConf = new SparkConf()
.setMaster("local")
.setAppName("Demo");
作者：dounine
链接：https://www.jianshu.com/p/2e6b4018f9e8
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