Examples of org.apache.hadoop.hdfs.server.namenode.FSNamesystem.refreshNodes()

Package org.apache.hadoop.hdfs.server.namenode

Class org.apache.hadoop.hdfs.server.namenode.FSNamesystem

Examples of org.apache.hadoop.hdfs.server.namenode.FSNamesystem.refreshNodes()

org.apache.hadoop.hdfs.server.namenode.FSNamesystem.refreshNodes()
Rereads the config to get hosts and exclude list file names. Rereads the files to update the hosts and exclude lists. It checks if any of the hosts have changed states: 1. Added to hosts --> no further work needed here. 2. Removed from hosts --> mark AdminState as decommissioned. 3. Added to exclude --> start decommission. 4. Removed from exclude --> stop decommission.

    }
    // Call refreshNodes on FSNamesystem with empty exclude file.
    // This will remove the datanodes from decommissioning list and
    // make them available again.
    writeConfigFile(localFileSys, excludeFile, null);
    fsn.refreshNodes(conf);
    st1.close();
    cleanupFile(fileSys, file1);
    cleanupFile(fileSys, file2);
    cleanupFile(localFileSys, dir);
  }

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    }
    // Call refreshNodes on FSNamesystem with empty exclude file.
    // This will remove the datanodes from decommissioning list and
    // make them available again.
    writeConfigFile(localFileSys, excludeFile, null);
    fsn.refreshNodes(conf);
    st1.close();
    cleanupFile(fileSys, file1);
    cleanupFile(fileSys, file2);
    cleanupFile(localFileSys, dir);
  }

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    }
    // Call refreshNodes on FSNamesystem with empty exclude file.
    // This will remove the datanodes from decommissioning list and
    // make them available again.
    writeConfigFile(localFileSys, excludeFile, null);
    fsn.refreshNodes(conf);
    st1.close();
    cleanupFile(fileSys, file1);
    cleanupFile(fileSys, file2);
    cleanupFile(localFileSys, dir);
  }

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      // Check namenode stats for multiple datanode heartbeats
      verifyStats(namenode, fsn, downnode, true);
      
      // Stop decommissioning and verify stats
      writeConfigFile(excludeFile, null);
      fsn.refreshNodes(conf);
      DatanodeInfo ret = fsn.getDatanode(downnode);
      waitNodeState(ret, AdminStates.NORMAL);
      verifyStats(namenode, fsn, ret, false);
    }
  }

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    }
    // Call refreshNodes on FSNamesystem with empty exclude file.
    // This will remove the datanodes from decommissioning list and
    // make them available again.
    writeConfigFile(localFileSys, excludeFile, null);
    fsn.refreshNodes(conf);
    st1.close();
    cleanupFile(fileSys, file1);
    cleanupFile(fileSys, file2);
    cleanupFile(localFileSys, dir);
  }

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      // Check namenode stats for multiple datanode heartbeats
      verifyStats(namenode, fsn, downnode, true);
      
      // Stop decommissioning and verify stats
      writeConfigFile(excludeFile, null);
      fsn.refreshNodes(conf);
      DatanodeInfo ret = fsn.getDatanode(downnode);
      waitNodeState(ret, AdminStates.NORMAL);
      verifyStats(namenode, fsn, ret, false);
    }
  }

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