private void doGetLevel() throws Exception {
      process(protocol + "://" + hostName + "/logLevel?log=" + className);
    }
Send HTTP request to get log level.
@throws HadoopIllegalArgumentException if arguments are invalid.
@throws Exception                      if unable to connect
hbase-http/src/main/java/org/apache/hadoop/hbase/http/log/LogLevel.java