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From "Lei Chen (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-714) Namenode format does not work when hadoop is installed for first time
Date Tue, 14 Nov 2006 00:57:37 GMT
Namenode format does not work when hadoop is installed for first time
---------------------------------------------------------------------

                 Key: HADOOP-714
                 URL: http://issues.apache.org/jira/browse/HADOOP-714
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.8.0
         Environment: Linux CentOS 4
            Reporter: Lei Chen


The namenode can not be formatted for the first time installation. There is a bug is the main
function of org.apache.hadoop.dfs.NameNode class. The code will skip formatting when the directory
for name does not exist. There is a possible fix for the bug

			if (argv.length == 1 && argv[0].equals("-format")) {
				boolean aborted = false;
				File[] dirs = getDirs(conf);

				for (int idx = 0; idx < dirs.length; idx++) {
					if (dirs[idx].exists()) {
						System.err.print("Re-format filesystem in " + dirs[idx]
								+ " ? (Y or N) ");
						if (!(System.in.read() == 'Y')) {
							System.err
									.println("Format aborted in " + dirs[idx]);
							aborted = true;
						} else {
							System.out.println("do format"
									+ dirs[idx].getAbsolutePath());
							format(dirs[idx]);
							System.err.println("Formatted " + dirs[idx]);
						}
						System.in.read(); // discard the enter-key
					} else {
						System.out.println("do format"
								+ dirs[idx].getAbsolutePath());
						format(dirs[idx]);
						System.err.println("Formatted " + dirs[idx]);
					}
				}

				System.exit(aborted ? 1 : 0);
			}


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