zookeeper启动报：Starting zookeeper ... already running as process 2293.

启动完服务器后，启动zooleeper的时候，提示这个：Starting zookeeper … already running as process 2293. 百度了下，说的是zookeeper非正常关闭，导致启动起不来， 解决办法：用命令rm zookeeper-server.pid 删除zookeeper-server.pid文件，然后重新启动就好了 zookeeper-server.pi

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