Example usage for org.apache.hadoop.mapred ShuffleHandler stopApplication

Introduction

In this page you can find the example usage for org.apache.hadoop.mapred ShuffleHandler stopApplication.

Prototype

@Override
    public void stopApplication(ApplicationTerminationContext context) 

Source Link

Usage

From source file:org.apache.tez.auxservices.TestShuffleHandler.java

License:Apache License

@Test
public void testRecovery() throws IOException {
    final String user = "someuser";
    final ApplicationId appId = ApplicationId.newInstance(12345, 1);
    final JobID jobId = JobID.downgrade(TypeConverter.fromYarn(appId));
    final File tmpDir = new File(System.getProperty("test.build.data", System.getProperty("java.io.tmpdir")),
            TestShuffleHandler.class.getName());
    Configuration conf = new Configuration();
    conf.setInt(ShuffleHandler.SHUFFLE_PORT_CONFIG_KEY, 0);
    conf.setInt(ShuffleHandler.MAX_SHUFFLE_CONNECTIONS, 3);
    ShuffleHandler shuffle = new ShuffleHandler();
    // emulate aux services startup with recovery enabled
    shuffle.setRecoveryPath(new Path(tmpDir.toString()));
    tmpDir.mkdirs();/*  w  w w  .  j a va 2s  .c o m*/
    try {
        shuffle.init(conf);
        shuffle.start();

        // setup a shuffle token for an application
        DataOutputBuffer outputBuffer = new DataOutputBuffer();
        outputBuffer.reset();
        Token<JobTokenIdentifier> jt = new Token<JobTokenIdentifier>("identifier".getBytes(),
                "password".getBytes(), new Text(user), new Text("shuffleService"));
        jt.write(outputBuffer);
        shuffle.initializeApplication(new ApplicationInitializationContext(user, appId,
                ByteBuffer.wrap(outputBuffer.getData(), 0, outputBuffer.getLength())));

        // verify we are authorized to shuffle
        int rc = getShuffleResponseCode(shuffle, jt);
        Assert.assertEquals(HttpURLConnection.HTTP_OK, rc);

        // emulate shuffle handler restart
        shuffle.close();
        shuffle = new ShuffleHandler();
        shuffle.setRecoveryPath(new Path(tmpDir.toString()));
        shuffle.init(conf);
        shuffle.start();

        // verify we are still authorized to shuffle to the old application
        rc = getShuffleResponseCode(shuffle, jt);
        Assert.assertEquals(HttpURLConnection.HTTP_OK, rc);

        // shutdown app and verify access is lost
        shuffle.stopApplication(new ApplicationTerminationContext(appId));
        rc = getShuffleResponseCode(shuffle, jt);
        Assert.assertEquals(HttpURLConnection.HTTP_UNAUTHORIZED, rc);

        // emulate shuffle handler restart
        shuffle.close();
        shuffle = new ShuffleHandler();
        shuffle.setRecoveryPath(new Path(tmpDir.toString()));
        shuffle.init(conf);
        shuffle.start();

        // verify we still don't have access
        rc = getShuffleResponseCode(shuffle, jt);
        Assert.assertEquals(HttpURLConnection.HTTP_UNAUTHORIZED, rc);
    } finally {
        if (shuffle != null) {
            shuffle.close();
        }
        FileUtil.fullyDelete(tmpDir);
    }
}

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