之前说过case有两个

switch (startOpt) {      case FORMAT:        boolean aborted = format(conf, true);        System.exit(aborted ? 1 : 0);      case FINALIZE:        aborted = finalize(conf, true);        System.exit(aborted ? 1 : 0);      default:    }

现在看下finalize：

private static boolean finalize(Configuration conf,                               boolean isConfirmationNeeded                               ) throws IOException {    Collection
     
       dirsToFormat = FSNamesystem.getNamespaceDirs(conf);    Collection
      
        editDirsToFormat =                                FSNamesystem.getNamespaceEditsDirs(conf);    FSNamesystem nsys = new FSNamesystem(new FSImage(dirsToFormat,                                         editDirsToFormat), conf);    System.err.print(        "\"finalize\" will remove the previous state of the files system.\n"        + "Recent upgrade will become permanent.\n"        + "Rollback option will not be available anymore.\n");    if (isConfirmationNeeded) {      System.err.print("Finalize filesystem state ? (Y or N) ");      if (!(System.in.read() == 'Y')) {        System.err.println("Finalize aborted.");        return true;      }      while(System.in.read() != '\n'); // discard the enter-key    }    nsys.dir.fsImage.finalizeUpgrade();    return false;  }
      
     

 

接下来会牵扯一些rpc相关的.

 

问题：

<property>

  <name>dfs.namenode.handler.count</name>

  <value>10</value>

  <description>The number of server threads for the namenode.</description>

</property>