Exception in thread "main" java.lang.NoClassDefFoundError: com/twitter/chill/KryoBase

Question

我正在 java 中使用 datastax cassandra 编写一个简单的 spark-cassandra 程序，但出现以下异常

Exception in thread "main" java.lang.NoClassDefFoundError: com/twitter/chill/KryoBase Caused by: java.lang.ClassNotFoundException: com.twitter.chill.KryoBase

pom.xml

 <dependency>
        <groupId>com.datastax.dse</groupId>
        <artifactId>dse-spark-dependencies</artifactId>
        <version>5.1.1</version>
        <exclusions>
            <exclusion>
                <groupId>com.datastax.dse</groupId>
                <artifactId>dse-java-driver-core</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.apache.solr</groupId>
                <artifactId>solr-solrj</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

App.java

 SparkConf conf = new SparkConf().setMaster("local").setAppName("SparkJavaFirst")
                    .set("spark.cassandra.connection.host", "localhost");     
JavaSparkContext sc = new JavaSparkContext(conf);  
JavaRDD<CassandraRow> cassandraJavaRDD =  CassandraJavaUtil.javaFunctions(sc).
                    cassandraTable("my_keyspace","my_table" ).
                    select("my_column");

程序在 JavaSparkContext sc = new JavaSparkContext(conf);

处失败

如有任何帮助，我们将不胜感激。

Answer 1

这个问题得到解决，因为我删除了

的排除项

 <groupId>com.datastax.dse</groupId>  
  <artifactId>dse-java-driver-core</artifactId>

Exception in thread "main" java.lang.NoClassDefFoundError: com/twitter/chill/KryoBase

Exception in thread "main" java.lang.NoClassDefFoundError: com/twitter/chill/KryoBase

scala

datastax-enterprise

cassandra-2.0

apache-spark