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  • java/
  • Spark异常：java.io.NotSerializableException:org.apache.Spark.streaming.api.java.JavaStreamingContext

Spark异常：java.io.NotSerializableException:org.apache.Spark.streaming.api.java.JavaStreamingContext

java spring apache-spark cassandra

Spark异常：java.io.NotSerializableException:org.apache.Spark.streaming.api.java.JavaStreamingContext,java,spring,apache-spark,cassandra,spark-cassandra-connector,Java,Spring,Apache Spark,Cassandra,Spark Cassandra Connector,我试图运行一个相当简单的示例，其中包括将Spark连接到Cassandra并聚合数据。该实现使用的是SpringCassandra连接器、java、spring，实际上没有太多其他功能 这是我通过Spring连接的Spark配置文件 @Configuration @ComponentScan("test.spark.service") @Import({CassandraConfig.class}) public class SparkConfig { @Autowired p

我试图运行一个相当简单的示例，其中包括将Spark连接到Cassandra并聚合数据。该实现使用的是SpringCassandra连接器、java、spring，实际上没有太多其他功能

这是我通过Spring连接的Spark配置文件

@Configuration
@ComponentScan("test.spark.service")
@Import({CassandraConfig.class})
public class SparkConfig {

    @Autowired
    private String cassandraUrl;

    @Bean
    public SparkConf sparkConf() {
        SparkConf sparkConf = new SparkConf();

        // configure all the bells and whistles
        sparkConf
                .setMaster("spark://localhost:7077")
                .setAppName("DataAggregator")
                .set("spark.cassandra.connection.host", cassandraUrl);

        return sparkConf;
    }

    @Bean
    public JavaStreamingContext javaStreamingContext() {
        return new JavaStreamingContext(sparkConf(), new Duration(1000));
    }
}
这里是不引发异常的服务类

@Service
public class SparkServiceImpl implements SparkService, Serializable {

    private static final Logger LOGGER = LoggerFactory.getLogger(SparkServiceImpl.class);

    @Autowired
    JavaStreamingContext javaStreamingContext;

    @Override
    public void process() {
        CassandraJavaRDD<CassandraRow> rdd = CassandraStreamingJavaUtil.javaFunctions(javaStreamingContext).cassandraTable("keyspace", "table");

    }
}

@Service
public class SparkServiceImpl implements SparkService, Serializable {

    private static final Logger LOGGER = LoggerFactory.getLogger(SparkServiceImpl.class);

    @Autowired
    JavaStreamingContext javaStreamingContext;

    @Override
    public void process() {
        CassandraJavaRDD<CassandraRow> rdd = CassandraStreamingJavaUtil.javaFunctions(javaStreamingContext).cassandraTable("keyspace", "table");

        JavaPairRDD<Integer, Iterable<CassandraRow>> javaPairRDD = rdd.groupBy(new Function<CassandraRow, Integer>() {
            @Override
            public Integer call(CassandraRow row) throws Exception {
                return row.getInt("int_column");
            }
        });
    }
}

org.apache.spark.SparkException: Task not serializable

    at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:298)
    at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean(ClosureCleaner.scala:288)
    at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:108)
    at org.apache.spark.SparkContext.clean(SparkContext.scala:2037)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$3.apply(RDD.scala:694)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$3.apply(RDD.scala:693)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
    at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
    at org.apache.spark.rdd.RDD.groupBy(RDD.scala:693)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$1.apply(RDD.scala:665)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$1.apply(RDD.scala:665)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
    at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
    at org.apache.spark.rdd.RDD.groupBy(RDD.scala:664)
    at org.apache.spark.api.java.JavaRDDLike$class.groupBy(JavaRDDLike.scala:242)
    at org.apache.spark.api.java.AbstractJavaRDDLike.groupBy(JavaRDDLike.scala:45)
    at test.spark.service.SparkServiceImpl.process(SparkServiceImpl.java:32)
    at test.spark.service.SparkServiceTest.testProcess(SparkServiceTest.java:27)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.io.NotSerializableException: test.spark.service.SparkServiceImpl
Serialization stack:
    - object not serializable (class: test.spark.service.SparkServiceImpl, value: test.spark.service.SparkServiceImpl@47b269c4)
    - field (class: test.spark.service.SparkServiceImpl$1, name: this$0, type: class test.spark.service.SparkServiceImpl)
    - object (class test.spark.service.SparkServiceImpl$1, test.spark.service.SparkServiceImpl$1@23ad71bf)
    - field (class: org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, name: fun$1, type: interface org.apache.spark.api.java.function.Function)
    - object (class org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, <function1>)
    at org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40)
    at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:46)
    at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:100)
    at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:295)
    ... 52 more

@服务
公共类SparkServiceImpl实现SparkService，可序列化{
私有静态最终记录器Logger=LoggerFactory.getLogger（SparkServiceImpl.class）；
@自动连线
JavaStreamingContext JavaStreamingContext；
@凌驾
公共程序（）{
CassandraJavaRDD rdd=CassandraStreamingJavaUtil.javaFunctions（javaStreamingContext.cassandraTable（“键空间”、“表”）；
}
}
这似乎有效，并返回一个木薯

一旦我将实现更改为使用groupBy/函数，它就会出现可序列化异常

@Service
public class SparkServiceImpl implements SparkService, Serializable {

    private static final Logger LOGGER = LoggerFactory.getLogger(SparkServiceImpl.class);

    @Autowired
    JavaStreamingContext javaStreamingContext;

    @Override
    public void process() {
        CassandraJavaRDD<CassandraRow> rdd = CassandraStreamingJavaUtil.javaFunctions(javaStreamingContext).cassandraTable("keyspace", "table");

    }
}

@Service
public class SparkServiceImpl implements SparkService, Serializable {

    private static final Logger LOGGER = LoggerFactory.getLogger(SparkServiceImpl.class);

    @Autowired
    JavaStreamingContext javaStreamingContext;

    @Override
    public void process() {
        CassandraJavaRDD<CassandraRow> rdd = CassandraStreamingJavaUtil.javaFunctions(javaStreamingContext).cassandraTable("keyspace", "table");

        JavaPairRDD<Integer, Iterable<CassandraRow>> javaPairRDD = rdd.groupBy(new Function<CassandraRow, Integer>() {
            @Override
            public Integer call(CassandraRow row) throws Exception {
                return row.getInt("int_column");
            }
        });
    }
}

org.apache.spark.SparkException: Task not serializable

    at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:298)
    at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean(ClosureCleaner.scala:288)
    at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:108)
    at org.apache.spark.SparkContext.clean(SparkContext.scala:2037)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$3.apply(RDD.scala:694)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$3.apply(RDD.scala:693)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
    at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
    at org.apache.spark.rdd.RDD.groupBy(RDD.scala:693)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$1.apply(RDD.scala:665)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$1.apply(RDD.scala:665)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
    at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
    at org.apache.spark.rdd.RDD.groupBy(RDD.scala:664)
    at org.apache.spark.api.java.JavaRDDLike$class.groupBy(JavaRDDLike.scala:242)
    at org.apache.spark.api.java.AbstractJavaRDDLike.groupBy(JavaRDDLike.scala:45)
    at test.spark.service.SparkServiceImpl.process(SparkServiceImpl.java:32)
    at test.spark.service.SparkServiceTest.testProcess(SparkServiceTest.java:27)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.io.NotSerializableException: test.spark.service.SparkServiceImpl
Serialization stack:
    - object not serializable (class: test.spark.service.SparkServiceImpl, value: test.spark.service.SparkServiceImpl@47b269c4)
    - field (class: test.spark.service.SparkServiceImpl$1, name: this$0, type: class test.spark.service.SparkServiceImpl)
    - object (class test.spark.service.SparkServiceImpl$1, test.spark.service.SparkServiceImpl$1@23ad71bf)
    - field (class: org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, name: fun$1, type: interface org.apache.spark.api.java.function.Function)
    - object (class org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, <function1>)
    at org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40)
    at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:46)
    at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:100)
    at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:295)
    ... 52 more

@服务
公共类SparkServiceImpl实现SparkService，可序列化{
私有静态最终记录器Logger=LoggerFactory.getLogger（SparkServiceImpl.class）；
@自动连线
JavaStreamingContext JavaStreamingContext；
@凌驾
公共程序（）{
CassandraJavaRDD rdd=CassandraStreamingJavaUtil.javaFunctions（javaStreamingContext.cassandraTable（“键空间”、“表”）；
javapairdd javapairdd=rdd.groupBy（新函数（）{
@凌驾
公共整数调用（CassandraRow行）引发异常{
返回row.getInt（“int_列”）；
}
});
}
}
这是堆栈跟踪

org.apache.spark.SparkException: Task not serializable

    at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:298)
    at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean(ClosureCleaner.scala:288)
    at org.apache.spark.util.ClosureCleaner$.clean(ClosureCleaner.scala:108)
    at org.apache.spark.SparkContext.clean(SparkContext.scala:2037)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$3.apply(RDD.scala:694)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$3.apply(RDD.scala:693)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
    at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
    at org.apache.spark.rdd.RDD.groupBy(RDD.scala:693)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$1.apply(RDD.scala:665)
    at org.apache.spark.rdd.RDD$$anonfun$groupBy$1.apply(RDD.scala:665)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
    at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
    at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
    at org.apache.spark.rdd.RDD.groupBy(RDD.scala:664)
    at org.apache.spark.api.java.JavaRDDLike$class.groupBy(JavaRDDLike.scala:242)
    at org.apache.spark.api.java.AbstractJavaRDDLike.groupBy(JavaRDDLike.scala:45)
    at test.spark.service.SparkServiceImpl.process(SparkServiceServiceImpl.java:56)
    at test.spark.service.SparkServiceTest.testProcess(SparkServiceTest.java:27)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.io.NotSerializableException: org.apache.spark.streaming.api.java.JavaStreamingContext
Serialization stack:
    - object not serializable (class: org.apache.spark.streaming.api.java.JavaStreamingContext, value: org.apache.spark.streaming.api.java.JavaStreamingContext@4538856f)
    - field (class: test.spark.service.SparkServiceImpl, name: javaStreamingContext, type: class org.apache.spark.streaming.api.java.JavaStreamingContext)
    - object (class test.spark.service.SparkServiceImpl, test.spark.service.SparkServiceImpl@7e34b127)
    - field (class: test.spark.service.SparkServiceImpl$1, name: this$0, type: class test.spark.service.SparkServiceImpl)
    - object (class test.spark.service.SparkServiceImpl$1, test.spark.service.SparkServiceImpl$1@536b71b4)
    - field (class: org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, name: fun$1, type: interface org.apache.spark.api.java.function.Function)
    - object (class org.apache.spark.api.java.JavaPairRDD$$anonfun$toScalaFunction$1, <function1>)
    at org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40)
    at org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:46)
    at org.apache.spark.serializer.JavaSerializerInstance.serialize(JavaSerializer.scala:100)
    at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:295)
    ... 52 more

org.apache.spark.SparkException:任务不可序列化
位于org.apache.spark.util.ClosureCleaner$.ensureSerializable（ClosureCleaner.scala:298）
位于org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean（ClosureCleaner.scala:288）
位于org.apache.spark.util.ClosureCleaner$.clean（ClosureCleaner.scala:108）
位于org.apache.spark.SparkContext.clean（SparkContext.scala:2037）
位于org.apache.spark.rdd.rdd$$anonfun$groupBy$3.apply（rdd.scala:694）
位于org.apache.spark.rdd.rdd$$anonfun$groupBy$3.apply（rdd.scala:693）
位于org.apache.spark.rdd.RDDOperationScope$.withScope（RDDOperationScope.scala:151）
位于org.apache.spark.rdd.RDDOperationScope$.withScope（RDDOperationScope.scala:112）
位于org.apache.spark.rdd.rdd.withScope（rdd.scala:358）
位于org.apache.spark.rdd.rdd.groupBy（rdd.scala:693）
位于org.apache.spark.rdd.rdd$$anonfun$groupBy$1.apply（rdd.scala:665）
位于org.apache.spark.rdd.rdd$$anonfun$groupBy$1.apply（rdd.scala:665）
位于org.apache.spark.rdd.RDDOperationScope$.withScope（RDDOperationScope.scala:151）
位于org.apache.spark.rdd.RDDOperationScope$.withScope（RDDOperationScope.scala:112）
位于org.apache.spark.rdd.rdd.withScope（rdd.scala:358）
位于org.apache.spark.rdd.rdd.groupBy（rdd.scala:664）
位于org.apache.spark.api.java.JavaRDDLike$class.groupBy（JavaRDDLike.scala:242）
位于org.apache.spark.api.java.AbstractJavaRDDLike.groupBy（JavaRDDLike.scala:45）
在test.spark.service.SparkServiceImpl.process（SparkServiceServiceImpl.java:56）
在test.spark.service.SparkServiceTest.testProcess（SparkServiceTest.java:27）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）中
位于java.lang.reflect.Method.invoke（Method.java:498）
位于org.junit.runners.model.FrameworkMethod$1.runReflectVeCall（FrameworkMethod.java:50）
位于org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12）
位于org.junit.runners.model.FrameworkMethod.invokeeexplosive（FrameworkMethod.java:47）
位于org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:17）
位于org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate（RunBeforeTestMethodCallbacks.java:75）
位于org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate（RunAfterTestMethodCallbacks.java:86）
位于org.springframework.test.context.junit4.statements.SpringRepeat.evaluate（SpringRepeat.java:84）
位于org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:325）
位于org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:252）
位于org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:94）
位于org.junit.runners.ParentRunner$3.run（ParentRunner.java:290）
位于org.junit.runners.ParentRunner$1.schedule（ParentRunner.java:71）
位于org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288）
访问org.junit.runners.ParentRunner.access$000（ParentRunner.java:58）
位于org.junit.runners.ParentRunner$2.evaluate（ParentRunner.java:268）
位于org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate（RunBeforeTestClassCallbacks.java:61）
位于org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate（RunAfterTestClassCallbacks.java:70）
位于org.junit.runners.ParentRunner.run（ParentRunner.java:363）
位于org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run（SpringJUnit4ClassRunner.java:191）
位于org.junit.runner.JUnitCore.run（JUnitCore.java:137）
位于com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs（JUnit4IdeaTestRunner.java:117）
位于com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs（JUnit4IdeaTestRunner.java:42）
位于com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart（JUnitStarter.java:262）
位于com.intellij.rt.execution.junit.JUnitStarter.main（JUnitStarter.java:84）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
在sun.reflect.NativeMethodAccessorImp