我们使用hiveserver2（在hortonworkshdp2.2发行版上）创建新的claster。一段时间后，我们在hdfs上的/tmp/hive/hive中有超过1048576个目录，因为hive服务器在这个位置生成它。
有人有类似的问题吗？来自hiveserver的日志：

2015-08-31 06:48:15,828 WARN  [HiveServer2-Handler-Pool: Thread-1104]: conf.HiveConf (HiveConf.java:initialize(2499)) - HiveConf of name hive.heapsize does not exist
2015-08-31 06:48:15,829 WARN  [HiveServer2-Handler-Pool: Thread-1104]: conf.HiveConf (HiveConf.java:initialize(2499)) - HiveConf of name hive.server2.enable.impersonation does not exist
2015-08-31 06:48:15,829 WARN  [HiveServer2-Handler-Pool: Thread-1104]: conf.HiveConf (HiveConf.java:initialize(2499)) - HiveConf of name hive.auto.convert.sortmerge.join.noconditionaltask does not exist
2015-08-31 06:48:15,833 INFO  [HiveServer2-Handler-Pool: Thread-1104]: thrift.ThriftCLIService (ThriftCLIService.java:OpenSession(232)) - Client protocol version: HIVE_CLI_SERVICE_PROTOCOL_V6
2015-08-31 06:48:15,835 INFO  [HiveServer2-Handler-Pool: Thread-1104]: session.SessionState (SessionState.java:createPath(558)) - Created local directory: /tmp/ffd9e5e7-7a4e-472e-b5f1-9c7f8acb0bff_resources
2015-08-31 06:48:15,883 INFO  [HiveServer2-Handler-Pool: Thread-1104]: session.SessionState (SessionState.java:createPath(558)) - Created HDFS directory: /tmp/hive/hive/ffd9e5e7-7a4e-472e-b5f1-9c7f8acb0bff
2015-08-31 06:48:15,884 INFO  [HiveServer2-Handler-Pool: Thread-1104]: session.SessionState (SessionState.java:createPath(558)) - Created local directory: /tmp/hive/ffd9e5e7-7a4e-472e-b5f1-9c7f8acb0bff
2015-08-31 06:48:16,064 INFO  [HiveServer2-Handler-Pool: Thread-1104]: session.SessionState (SessionState.java:createPath(558)) - Created HDFS directory: /tmp/hive/hive/ffd9e5e7-7a4e-472e-b5f1-9c7f8acb0bff/_tmp_space.db
2015-08-31 06:48:16,065 INFO  [HiveServer2-Handler-Pool: Thread-1104]: session.SessionState (SessionState.java:start(460)) - No Tez session required at this point. hive.execution.engine=mr.

创建会话时的hiveserver方法：

/**
   * Create dirs & session paths for this session:
   * 1. HDFS scratch dir
   * 2. Local scratch dir
   * 3. Local downloaded resource dir
   * 4. HDFS session path
   * 5. Local session path
   * 6. HDFS temp table space
   * @param userName
   * @throws IOException
   */
  private void createSessionDirs(String userName) throws IOException {
    HiveConf conf = getConf();
    Path rootHDFSDirPath = createRootHDFSDir(conf);
    // Now create session specific dirs
    String scratchDirPermission = HiveConf.getVar(conf, HiveConf.ConfVars.SCRATCHDIRPERMISSION);
    Path path;
    // 1. HDFS scratch dir
    path = new Path(rootHDFSDirPath, userName);
    hdfsScratchDirURIString = path.toUri().toString();
    createPath(conf, path, scratchDirPermission, false, false);
    // 2. Local scratch dir
    path = new Path(HiveConf.getVar(conf, HiveConf.ConfVars.LOCALSCRATCHDIR));
    createPath(conf, path, scratchDirPermission, true, false);
    // 3. Download resources dir
    path = new Path(HiveConf.getVar(conf, HiveConf.ConfVars.DOWNLOADED_RESOURCES_DIR));
    createPath(conf, path, scratchDirPermission, true, false);
    // Finally, create session paths for this session
    // Local & non-local tmp location is configurable. however it is the same across
    // all external file systems
    String sessionId = getSessionId();
    // 4. HDFS session path
    hdfsSessionPath = new Path(hdfsScratchDirURIString, sessionId);
    createPath(conf, hdfsSessionPath, scratchDirPermission, false, true);
    conf.set(HDFS_SESSION_PATH_KEY, hdfsSessionPath.toUri().toString());
    // 5. Local session path
    localSessionPath = new Path(HiveConf.getVar(conf, HiveConf.ConfVars.LOCALSCRATCHDIR), sessionId);
    createPath(conf, localSessionPath, scratchDirPermission, true, true);
    conf.set(LOCAL_SESSION_PATH_KEY, localSessionPath.toUri().toString());
    // 6. HDFS temp table space
    hdfsTmpTableSpace = new Path(hdfsSessionPath, TMP_PREFIX);
    createPath(conf, hdfsTmpTableSpace, scratchDirPermission, false, true);
    conf.set(TMP_TABLE_SPACE_KEY, hdfsTmpTableSpace.toUri().toString());
  }