今天装完cdh后，启动Kudu的master发现报了以下错误：
凌晨12点28:30.722分 INFO cc:313
Webserver started. Bound to: http://0.0.0.0:8051/
凌晨12点28:30.727分 INFO cc:188
Verifying existing consensus state
凌晨12点28:30.727分 ERROR cc:228
Unable to init master catalog manager: Not found: Unable to initialize catalog manager: Failed to initialize sys tables async: Unable to load consensus metadata for tablet 00000000000000000000000000000000: Unable to load consensus metadata for tablet 00000000000000000000000000000000: /opt/kudu/master_wal/consensus-meta/00000000000000000000000000000000: No such file or directory (error 2)
凌晨12点28:30.730分 FATAL cc:84
Check failed: _s.ok() Bad status: Not found: Unable to initialize catalog manager: Failed to initialize sys tables async: Unable to load consensus metadata for tablet 00000000000000000000000000000000: Unable to load consensus metadata for tablet 00000000000000000000000000000000: /opt/kudu/master_wal/consensus-meta/00000000000000000000000000000000: No such file or 根据往常经验，可能是
1、Kudu之前启动过，但由于当时出现错误而退出，再次启动后对应的目录不为空导致的，
2、wal和data目录配置到同一个目录
由于我有对该目录进行单独配置，不存在同一个目录的情况，于是
1、停止所有Kudu相关进程
2、清空对应的master和tserver的日志和数据目录后
3、启动所有Kudu相关进程即可。
