Examples of org.apache.hadoop.hdfs.server.datanode.DataNode.shutdown()

Package org.apache.hadoop.hdfs.server.datanode

Class org.apache.hadoop.hdfs.server.datanode.DataNode

Examples of org.apache.hadoop.hdfs.server.datanode.DataNode.shutdown()

org.apache.hadoop.hdfs.server.datanode.DataNode.shutdown()
Shut down this instance of the datanode. Returns only after shutdown is complete. This method can only be called by the offerService thread. Otherwise, deadlock might occur.

   */
  public void shutdownDataNodes() {
    for (int i = dataNodes.size()-1; i >= 0; i--) {
      System.out.println("Shutting down DataNode " + i);
      DataNode dn = dataNodes.remove(i).datanode;
      dn.shutdown();
      numDataNodes--;
    }
  }


  /**

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    DataNode dn = dnprop.datanode;
    System.out.println("MiniDFSCluster Stopping DataNode " + 
                       dn.dnRegistration.getName() +
                       " from a total of " + (dataNodes.size() + 1) + 
                       " datanodes.");
    dn.shutdown();
    numDataNodes--;
    return dnprop;
  }


  /*

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      // shutdown half the nodes and force a heartbeat check to ensure
      // counts are accurate
      for (int i=0; i < nodes/2; i++) {
        DataNode dn = datanodes.get(i);
        DatanodeDescriptor dnd = dnm.getDatanode(dn.getDatanodeId());
        dn.shutdown();
        dnd.setLastUpdate(0L);
        BlockManagerTestUtil.checkHeartbeat(namesystem.getBlockManager());
        expectedInServiceNodes--;
        assertEquals(expectedInServiceNodes, namesystem.getNumLiveDataNodes());
        assertEquals(expectedInServiceNodes, namesystem.getNumDatanodesInService());

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      }


      // shutdown each node, verify node counts based on decomm state
      for (int i=0; i < nodes; i++) {
        DataNode dn = datanodes.get(i);
        dn.shutdown();
        // force it to appear dead so live count decreases
        DatanodeDescriptor dnDesc = dnm.getDatanode(dn.getDatanodeId());
        dnDesc.setLastUpdate(0L);
        BlockManagerTestUtil.checkHeartbeat(namesystem.getBlockManager());
        assertEquals(nodes-1-i, namesystem.getNumLiveDataNodes());

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   */
  public void shutdownDataNodes() {
    for (int i = dataNodes.size()-1; i >= 0; i--) {
      System.out.println("Shutting down DataNode " + i);
      DataNode dn = dataNodes.remove(i).datanode;
      dn.shutdown();
      numDataNodes--;
    }
  }


  /*

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    DataNode dn = dnprop.datanode;
    System.out.println("MiniDFSCluster Stopping DataNode " + 
                       dn.dnRegistration.getName() +
                       " from a total of " + (dataNodes.size() + 1) + 
                       " datanodes.");
    dn.shutdown();
    numDataNodes--;
    return dnprop;
  }


  /**

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  public void shutdownDataNode(int index, boolean remove) {
    System.out.println("Shutting down DataNode " + index);
    DataNode dn = remove ? dataNodes.remove(index).datanode : dataNodes
        .get(index).datanode;
    dn.shutdown();
    numDataNodes--;
  }


  public synchronized void shutdownNameNode() {
    checkSingleNameNode();

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    DataNode dn = dnprop.datanode;
    System.out.println("MiniDFSCluster Stopping DataNode " + 
                       dn.getDatanodeInfo() +
                       " from a total of " + (dataNodes.size() + 1) + 
                       " datanodes.");
    dn.shutdown();
    numDataNodes--;
    return dnprop;
  }


  /**

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      fail();
    } catch(Exception e) {
      // expecting exception here
    } finally {
      if (dn != null) {
        dn.shutdown();
      }
    }
    assertNull("Data-node startup should have failed.", dn);


    // 2. Test "file:" schema and no schema (path-only). Both should work.

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    try {
      // Try starting the DN with limit configured to the ulimit
      conf.setLong(DFSConfigKeys.DFS_DATANODE_MAX_LOCKED_MEMORY_KEY,
          memlockLimit);
      dn = DataNode.createDataNode(new String[]{},  conf);
      dn.shutdown();
      dn = null;
      // Try starting the DN with a limit > ulimit
      conf.setLong(DFSConfigKeys.DFS_DATANODE_MAX_LOCKED_MEMORY_KEY,
          memlockLimit+1);
      try {

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