Example usage for org.apache.hadoop.hdfs DFSUtil getNamenodeServiceAddr

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs DFSUtil getNamenodeServiceAddr.

Prototype

public static String getNamenodeServiceAddr(final Configuration conf, String nsId, String nnId) 

Source Link

Document

Map a logical namenode ID to its service address.

Usage

From source file:co.cask.cdap.operations.hdfs.HDFSInfo.java

License:Apache License

@Nullable
private URL getHAWebURL() throws IOException {
    String activeNamenode = null;
    String nameService = getNameService();
    HdfsConfiguration hdfsConf = new HdfsConfiguration(conf);
    String nameNodePrincipal = conf.get(DFSConfigKeys.DFS_NAMENODE_USER_NAME_KEY, "");

    hdfsConf.set(CommonConfigurationKeys.HADOOP_SECURITY_SERVICE_USER_NAME_KEY, nameNodePrincipal);

    for (String nnId : DFSUtil.getNameNodeIds(conf, nameService)) {
        HAServiceTarget haServiceTarget = new NNHAServiceTarget(hdfsConf, nameService, nnId);
        HAServiceProtocol proxy = haServiceTarget.getProxy(hdfsConf, 10000);
        HAServiceStatus serviceStatus = proxy.getServiceStatus();
        if (HAServiceProtocol.HAServiceState.ACTIVE != serviceStatus.getState()) {
            continue;
        }/*from   ww  w.j  a  v  a  2 s . com*/
        activeNamenode = DFSUtil.getNamenodeServiceAddr(hdfsConf, nameService, nnId);
    }
    if (activeNamenode == null) {
        throw new IllegalStateException("Could not find an active namenode");
    }
    return rpcToHttpAddress(URI.create(activeNamenode));
}

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From source file:co.cask.cdap.operations.hdfs.HDFSNodes.java

License:Apache License

private List<String> getNameNodes() throws IOException {
    List<String> namenodes = new ArrayList<>();
    if (!HAUtil.isHAEnabled(conf, getNameService())) {
        try (FileSystem fs = FileSystem.get(conf)) {
            return Collections.singletonList(fs.getUri().toString());
        }/*from  w ww .j a v  a  2 s. c  om*/
    }
    String nameService = getNameService();
    for (String nnId : DFSUtil.getNameNodeIds(conf, nameService)) {
        namenodes.add(DFSUtil.getNamenodeServiceAddr(conf, nameService, nnId));
    }
    return namenodes;
}

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