Example usage for org.apache.hadoop.util Shell getHadoopHome

Introduction

In this page you can find the example usage for org.apache.hadoop.util Shell getHadoopHome.

Prototype

public static String getHadoopHome() throws IOException 

Source Link

Document

Get the Hadoop home directory.

Usage

From source file:eu.stratosphere.yarn.Utils.java

License:Apache License

public static Configuration initializeYarnConfiguration() {
    Configuration conf = new YarnConfiguration();
    String configuredHadoopConfig = GlobalConfiguration.getString(ConfigConstants.PATH_HADOOP_CONFIG, null);
    if (configuredHadoopConfig != null) {
        LOG.info("Using hadoop configuration path from " + ConfigConstants.PATH_HADOOP_CONFIG + " setting.");
        addPathToConfig(conf, new File(configuredHadoopConfig));
        setDefaultConfValues(conf);/*from w  w w. j ava  2s .c o m*/
        return conf;
    }
    String[] envs = { "YARN_CONF_DIR", "HADOOP_CONF_DIR", "HADOOP_CONF_PATH" };
    for (int i = 0; i < envs.length; ++i) {
        String confPath = System.getenv(envs[i]);
        if (confPath != null) {
            LOG.info("Found " + envs[i] + ", adding it to configuration");
            addPathToConfig(conf, new File(confPath));
            setDefaultConfValues(conf);
            return conf;
        }
    }
    LOG.info("Could not find HADOOP_CONF_PATH, using HADOOP_HOME.");
    String hadoopHome = null;
    try {
        hadoopHome = Shell.getHadoopHome();
    } catch (IOException e) {
        LOG.fatal("Unable to get hadoop home. Please set HADOOP_HOME variable!", e);
        System.exit(1);
    }
    File tryConf = new File(hadoopHome + "/etc/hadoop");
    if (tryConf.exists()) {
        LOG.info("Found configuration using hadoop home.");
        addPathToConfig(conf, tryConf);
    } else {
        tryConf = new File(hadoopHome + "/conf");
        if (tryConf.exists()) {
            addPathToConfig(conf, tryConf);
        }
    }
    setDefaultConfValues(conf);
    return conf;
}

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From source file:org.apache.atlas.web.listeners.LoginProcessor.java

License:Apache License

/**
 * Uses a hadoop shell to discern whether a hadoop cluster is available/configured.
 * @return true if a hadoop cluster is detected.
 *//*  ww w.  ja  v a 2 s.co  m*/
protected boolean isHadoopCluster() {
    boolean isHadoopCluster = false;
    try {
        isHadoopCluster = Shell.getHadoopHome() != null;
    } catch (IOException e) {
        // ignore - false is default setting
    }
    return isHadoopCluster;
}

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