HDFS-8551. Fix hdfs datanode CLI usage message. Contributed by Brahma Reddy Battula.
(cherry picked from commit 9cd5ad9d84
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@ -563,6 +563,9 @@ Release 2.8.0 - UNRELEASED
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HDFS-8548. Minicluster throws NPE on shutdown.
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HDFS-8548. Minicluster throws NPE on shutdown.
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(surendra singh lilhore via xyao)
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(surendra singh lilhore via xyao)
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HDFS-8551. Fix hdfs datanode CLI usage message.
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(Brahma Reddy Battula via xyao)
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Release 2.7.1 - UNRELEASED
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Release 2.7.1 - UNRELEASED
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INCOMPATIBLE CHANGES
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INCOMPATIBLE CHANGES
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@ -263,9 +263,11 @@ public class DataNode extends ReconfigurableBase
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LogFactory.getLog(DataNode.class.getName() + ".clienttrace");
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LogFactory.getLog(DataNode.class.getName() + ".clienttrace");
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private static final String USAGE =
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private static final String USAGE =
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"Usage: java DataNode [-regular | -rollback]\n" +
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"Usage: hdfs datanode [-regular | -rollback | -rollingupgrade rollback" +
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" ]\n" +
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" -regular : Normal DataNode startup (default).\n" +
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" -regular : Normal DataNode startup (default).\n" +
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" -rollback : Rollback a standard or rolling upgrade.\n" +
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" -rollback : Rollback a standard or rolling upgrade.\n" +
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" -rollingupgrade rollback : Rollback a rolling upgrade operation.\n" +
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" Refer to HDFS documentation for the difference between standard\n" +
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" Refer to HDFS documentation for the difference between standard\n" +
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" and rolling upgrades.";
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" and rolling upgrades.";
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