记录学习 Spark 过程遇到的一个问题

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10582
	at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.accept(BytecodeReadingParanamer.java:563)
	at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.access$200(BytecodeReadingParanamer.java:338)
	at com.thoughtworks.paranamer.BytecodeReadingParanamer.lookupParameterNames(BytecodeReadingParanamer.java:103)
	at com.thoughtworks.paranamer.CachingParanamer.lookupParameterNames(CachingParanamer.java:90)
	at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.getCtorParams(BeanIntrospector.scala:44)
	at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.$anonfun$apply$1(BeanIntrospector.scala:58)
	at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.$anonfun$apply$1$adapted(BeanIntrospector.scala:58)
	at scala.collection.TraversableLike.$anonfun$flatMap$1(TraversableLike.scala:240)
	at scala.collection.Iterator.foreach(Iterator.scala:937)
	at scala.collection.Iterator.foreach$(Iterator.scala:937)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1425)
	at scala.collection.IterableLike.foreach(IterableLike.scala:70)
	at scala.collection.IterableLike.foreach$(IterableLike.scala:69)
	at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
	at scala.collection.TraversableLike.flatMap(TraversableLike.scala:240)
	at scala.collection.TraversableLike.flatMap$(TraversableLike.scala:237)
	at scala.collection.AbstractTraversable.flatMap(Traversable.scala:104)
	at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.findConstructorParam$1(BeanIntrospector.scala:58)
	at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.$anonfun$apply$19(BeanIntrospector.scala:176)
	at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:233)
	at scala.collection.IndexedSeqOptimized.foreach(IndexedSeqOptimized.scala:32)
	at scala.collection.IndexedSeqOptimized.foreach$(IndexedSeqOptimized.scala:29)
	at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:194)
	at scala.collection.TraversableLike.map(TraversableLike.scala:233)
	at scala.collection.TraversableLike.map$(TraversableLike.scala:226)
	at scala.collection.mutable.ArrayOps$ofRef.map(ArrayOps.scala:194)
	at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.$anonfun$apply$14(BeanIntrospector.scala:170)
	at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.$anonfun$apply$14$adapted(BeanIntrospector.scala:169)
	at scala.collection.TraversableLike.$anonfun$flatMap$1(TraversableLike.scala:240)
	at scala.collection.immutable.List.foreach(List.scala:388)
	at scala.collection.TraversableLike.flatMap(TraversableLike.scala:240)
	at scala.collection.TraversableLike.flatMap$(TraversableLike.scala:237)
	at scala.collection.immutable.List.flatMap(List.scala:351)
	at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.apply(BeanIntrospector.scala:169)
	at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$._descriptorFor(ScalaAnnotationIntrospectorModule.scala:21)
	at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$.fieldName(ScalaAnnotationIntrospectorModule.scala:29)
	at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$.findImplicitPropertyName(ScalaAnnotationIntrospectorModule.scala:77)
	at com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair.findImplicitPropertyName(AnnotationIntrospectorPair.java:490)
	at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector._addFields(POJOPropertiesCollector.java:380)
	at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.collectAll(POJOPropertiesCollector.java:308)
	at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.getJsonValueAccessor(POJOPropertiesCollector.java:196)
	at com.fasterxml.jackson.databind.introspect.BasicBeanDescription.findJsonValueAccessor(BasicBeanDescription.java:251)
	at com.fasterxml.jackson.databind.ser.BasicSerializerFactory.findSerializerByAnnotations(BasicSerializerFactory.java:346)
	at com.fasterxml.jackson.databind.ser.BeanSerializerFactory._createSerializer2(BeanSerializerFactory.java:216)
	at com.fasterxml.jackson.databind.ser.BeanSerializerFactory.createSerializer(BeanSerializerFactory.java:165)
	at com.fasterxml.jackson.databind.SerializerProvider._createUntypedSerializer(SerializerProvider.java:1388)
	at com.fasterxml.jackson.databind.SerializerProvider._createAndCacheUntypedSerializer(SerializerProvider.java:1336)
	at com.fasterxml.jackson.databind.SerializerProvider.findValueSerializer(SerializerProvider.java:510)
	at com.fasterxml.jackson.databind.SerializerProvider.findTypedValueSerializer(SerializerProvider.java:713)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:308)
	at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:3905)
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3219)
	at org.apache.spark.rdd.RDDOperationScope.toJson(RDDOperationScope.scala:52)
	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:145)
	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
	at org.apache.spark.SparkContext.withScope(SparkContext.scala:699)
	at org.apache.spark.SparkContext.parallelize(SparkContext.scala:716)
	at org.apache.spark.api.java.JavaSparkContext.parallelize(JavaSparkContext.scala:134)
	at org.apache.spark.api.java.JavaSparkContext.parallelize(JavaSparkContext.scala:146)
	at cn.grgpay.WordCountService.union(WordCountService.java:48)
	at cn.grgpay.WordCountService.main(WordCountService.java:29)
	
	
​

最近在学习大数据框架 Spark 时，在 Spark2.4 版本上运行 Spark 例子的时候，遇到以上问题，解决方法如下：
在 pom.xml 文件上，在 spark 的相关依赖前添加以下依赖即可：

<dependency>
    <groupId>com.thoughtworks.paranamer</groupId>
    <artifactId>paranamer</artifactId>
    <version>2.8</version>
</dependency>
​

再次运行就不报这个错误了。