| /** |
| * 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.hadoop.streaming; |
| |
| import java.io.*; |
| |
| /** |
| * A simple Java app that will consume all input from stdin, echoing |
| * it to stdout, and then optionally throw an exception (which should |
| * cause a non-zero exit status for the process). |
| */ |
| public class FailApp |
| { |
| |
| public FailApp() { |
| } |
| |
| public void go(boolean fail) throws IOException { |
| BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); |
| String line; |
| |
| // Consume all input (to make sure streaming will still count this |
| // task as failed even if all input was consumed). |
| while ((line = in.readLine()) != null) { |
| System.out.println(line); |
| } |
| |
| if (fail) { |
| throw new RuntimeException("Intentionally failing task"); |
| } |
| } |
| |
| public static void main(String[] args) throws IOException { |
| boolean fail = true; |
| if (args.length >= 1 && "false".equals(args[0])) { |
| fail = false; |
| } |
| |
| FailApp app = new FailApp(); |
| app.go(fail); |
| } |
| } |