/**
* 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);
}
}