Spark Java Appilcation:java.lang.ClassNotFoundException

我使用Java创建了一个Apache Spark应用程序.它只是计算包含"spark"字的行数1000次.

这是我的代码:

public class Example1 {
    public static void main(String[] args) {
        String logfile = args[0];
        try{
            SparkConf conf = new SparkConf();
            conf.setAppName("Sample");
            conf.setMaster("spark://:7077");
            conf.set("spark.executor.memory", "1g");
            JavaSparkContext sc = new JavaSparkContext(conf);
            JavaRDD logData = sc.textFile(logfile).cache();
            long count = 0;
            for(int i=0; i<=1000; i++){
                count += logData.filter(new Function(){
                    public Boolean call(String s){
                        if (s.toLowerCase().contains("spark"))
                            return true;
                        else
                            return false;
                    }
                }).count();
            }
        }
        catch(Exception ex){
            System.out.println(ex.getMessage());
        }
    }
}

当我在Eclipse IDE中执行调试时,我遇到了java.lang.ClassNotFoundException:

WARN scheduler.TaskSetManager: Loss was due to java.lang.ClassNotFoundException
java.lang.ClassNotFoundException: org.spark.java.examples.Example1$1
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)

我也试图在集群内部使用spark-submit,但仍遇到同样的异常.这是stacktrace的一部分:

ERROR Executor: Exception in task ID 4
java.lang.ClassNotFoundException: org.spark.java.examples.Example1$1
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)

关于如何解决这个问题的任何想法？提前致谢!