Examples of org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.sendHeartbeat()

Package org.apache.hadoop.hdfs.server.protocol

Class org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol

Examples of org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.sendHeartbeat()

org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.sendHeartbeat()
sendHeartbeat() tells the NameNode that the DataNode is still alive and well. Includes some status info, too. It also gives the NameNode a chance to return an array of "DatanodeCommand" objects. A DatanodeCommand tells the DataNode to invalidate local block(s), or to copy them to other DataNodes, etc.

    // Ensure heartbeat from dead datanode is rejected with a command
    // that asks datanode to register again
    StorageReport[] rep = { new StorageReport(
        new DatanodeStorage(reg.getDatanodeUuid()),
        false, 0, 0, 0, 0) };
    DatanodeCommand[] cmd = dnp.sendHeartbeat(reg, rep, 0L, 0L, 0, 0, 0)
      .getCommands();
    assertEquals(1, cmd.length);
    assertEquals(cmd[0].getAction(), RegisterCommand.REGISTER
        .getAction());
  }

View Full Code Here

      // Expected
    }


    // Ensure heartbeat from dead datanode is rejected with a command
    // that asks datanode to register again
    DatanodeCommand[] cmd = dnp.sendHeartbeat(reg, 0, 0, 0, 0, 0, 0);
    Assert.assertEquals(1, cmd.length);
    Assert.assertEquals(cmd[0].getAction(), DatanodeCommand.REGISTER
        .getAction());
  }
}

View Full Code Here

0 1

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.