Example usage for org.apache.hadoop.hdfs.server.namenode NameNode getState

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs.server.namenode NameNode getState.

Prototype

@Override 
    public String getState() 

Source Link

Usage

From source file:backup.integration.MiniClusterTestBase.java

License:Apache License

@Test
public void testIntegrationBasicFullRestoreFromShutdown() throws Exception {
    File hdfsDir = setupHdfsLocalDir();
    Configuration conf = setupConfig(hdfsDir);
    {//from w  ww .ja  v a 2s .com
        MiniDFSCluster hdfsCluster = new MiniDFSCluster.Builder(conf).build();
        try {
            DistributedFileSystem fileSystem = hdfsCluster.getFileSystem();
            for (int i = 0; i < 5; i++) {
                Path path = new Path("/testing." + i + ".txt");
                System.out.println("Adding path " + path);
                writeFile(fileSystem, path);
            }

            Thread.sleep(TimeUnit.SECONDS.toMillis(3));

            hdfsCluster.stopDataNode(0);

            // Remove data
            FileUtils.deleteDirectory(new File(hdfsDir, "data"));

            hdfsCluster.startDataNodes(conf, 1, true, null, null);

            NameNode nameNode = hdfsCluster.getNameNode();
            for (int i = 0; i < 90; i++) {
                if (!nameNode.isInSafeMode()) {
                    return;
                }
                System.out.println(nameNode.getState() + " " + nameNode.isInSafeMode());
                Thread.sleep(1000);
            }
            fail();
        } finally {
            hdfsCluster.shutdown();
            destroyBackupStore(conf);
        }
    }
}

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