Spark SerializedLambda错误的两种解决方案
目录
- Spark SerializedLambda错误
- 解决方案(一)
- 解决方案(二)
- 执行spark报错EOFException Kryo和SerializedLambda
- EOFException Kryo问题的解决
- cannot assign instance SerializedLambda 报错问题的解决
Spark SerializedLambda错误
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");
执行spark报错EOFException Kryo和SerializedLambda
执行spark报错EOFException Kryo和SerializedLambda问题的解决办法
EOFException Kryo问题的解决
发布到spark的worker工作机的项目依赖库中删除底版本的kryo文件，如下：
在执行环境中删除kryo-2.21.jar文件和保留kryo-shaded-3.0.3.jar文件，执行就OK了。
经过查看在kryo-shaded-3.0.3.jar和geowave-tools-0.9.8-apache.jar文件中都有一个类存在，这个类是com.esofericsoftwave.kryo.io.UnSafeOutput.class,大小为7066, 然而kryo-2.21.jar确没有这个类。
具体报错信息为：特别在执行javaRDD.count()和javaRDD.maptoPair()方法时报错
java.io.EOFException at org.apache.spark.serializer.KryoDeserializationStream.readObject(KryoSerializer.scala:283) at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$8.apply(TorrentBroadcast.scala:308) at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1380) at org.apache.spark.broadcast.TorrentBroadcast$.unBlockifyObject(TorrentBroadcast.scala:309) at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$readBroadcastBlock$1$$anonfun$apply$2.apply(TorrentBroadcast.scala:235) at scala.Option.getOrElse(Option.scala:121) at org.apache.spark.broadcast.TorrentBroadcast$$anonfun$readBroadcastBlock$1.apply(TorrentBroadcast.scala:211) at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1346) at org.apache.spark.broadcast.TorrentBroadcast.readBroadcastBlock(TorrentBroadcast.scala:207) at org.apache.spark.broadcast.TorrentBroadcast._value$lzycompute(TorrentBroadcast.scala:66) at org.apache.spark.broadcast.TorrentBroadcast._value(TorrentBroadcast.scala:66) at org.apache.spark.broadcast.TorrentBroadcast.getValue(TorrentBroadcast.scala:96) at org.apache.spark.broadcast.Broadcast.value(Broadcast.scala:70) at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:81) at org.apache.spark.scheduler.Task.run(Task.scala:109) at org.apache.spark.executor.Executor$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)
cannot assign instance SerializedLambda 报错问题的解决
cannot assign instance of java.lang.invoke.SerializedLambda to field
在代码添加一行：
conf.setJars(JavaSparkContext.jarOfClass(this.getClass()));
运行就完全OK了
具体报错信息如下：
java.lang.ClassCastException: cannot assign instance of java.lang.invoke.SerializedLambda to field org.apache.spark.api.java.JavaPairRDD$$anonfun$pairFunToScalaFun$1.x$334 of type org.apache.spark.api.java.function.PairFunction in instance of org.apache.spark.api.java.JavaPairRDD$$anonfun$pairFunToScalaFun$1 at java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:2233) at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1405) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2291) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2209) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2067) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1571) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2285) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2209) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2067) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1571) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2285) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2209) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2067) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1571) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2285) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2209) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2067) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1571) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:431) 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.ShuffleMapTask.runTask(ShuffleMapTask.scala:85) at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53) 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) ... 1 more
以上为个人经验，希望能给大家一个参考，也希望大家多多支持自由互联。