当Spark独立群集不可用时，Spark驱动程序会抛出奇怪的异常

Question

Spark版本：1.4.1

我在驱动程序下运行并尝试为远程spark独立群集创建Spark Context。当火花报告错误后，远程火花簇不可用。例外的原因是什么（

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和

ERROR OneForOneStrategy: 
java.lang.NullPointerException

）以及如何消除它们？

注意：当我使用运行本地或远程独立群集时，我的应用程序运行正常。

Java程序

ERROR SparkContext: Error initializing SparkContext.
java.lang.IllegalStateException: Cannot call methods on a stopped SparkContext

Spark日志

public class SparkContextTest {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        JavaSparkContext sc = null;
        try {
            SparkConf conf = new SparkConf();
        conf.setAppName("testABC");
        conf.set("spark.scheduler.mode", "FAIR");

        conf.setMaster("spark://remote-server:7077")
                .set("spark.driver.allowMultipleContexts", "false")
                .set("spark.executor.memory", "1g")
                .set("spark.driver.maxResultSize", "1g");

         sc = new JavaSparkContext(conf);
        } catch(Exception e){                
            e.printStackTrace();
        } finally {
            if(null != sc){
                sc.clearCallSite();
                sc.close();
            }
        }

    }

}