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From kishorvpatil <...@git.apache.org>
Subject [GitHub] spark pull request #15009: [SPARK-17443][SPARK-11035] Stop Spark Application...
Date Wed, 19 Oct 2016 22:12:54 GMT
Github user kishorvpatil commented on a diff in the pull request:

    https://github.com/apache/spark/pull/15009#discussion_r84178923
  
    --- Diff: launcher/src/main/java/org/apache/spark/launcher/SparkSubmitRunner.java ---
    @@ -0,0 +1,59 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +
    +package org.apache.spark.launcher;
    +
    +import java.lang.reflect.InvocationTargetException;
    +import java.lang.reflect.Method;
    +import java.util.List;
    +
    +class SparkSubmitRunner implements Runnable {
    +  private Method main;
    +  private final List<String> args;
    +
    +  SparkSubmitRunner(Method main, List<String> args) {
    +    this.main = main;
    +    this.args = args;
    +  }
    +  /**
    +   *  Trying to see if method is available in the classpath.
    +   */
    +  protected static Method getSparkSubmitMain() throws ClassNotFoundException, NoSuchMethodException
{
    +      Class<?> cls = Class.forName("org.apache.spark.deploy.SparkSubmit");
    +      return cls.getDeclaredMethod("main", String[].class);
    +  }
    +
    +  @Override
    +  public void run() {
    +    try {
    +      if(main == null) {
    +        main = getSparkSubmitMain();
    +      }
    +      Object argsObj = args.toArray(new String[args.size()]);
    +      main.invoke(null, argsObj);
    +    } catch (IllegalAccessException illAcEx) {
    --- End diff --
    
    This is to simply enable early fail is `SparkSubmit` is not in classpath, instead of launched
`SparkSubmitRunner` thread finding the classpath issue.


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