[报错解决]Starting zookeeper ... already running as process 15400.

报错一

ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-cluster/zookeeper-1/bin/../conf/zoo.cfg
Starting zookeeper ... already running as process 15400.

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解决

netstat -anp | grep 端口号

# 如果集群没有启动，那么该端口不应该被占用
netstat -apn | grep 2181   #默认2181端口为服务端提供端口，如果你的修改了，按你的实际情况为准
# 查询出来占用2181端口的进程PID后杀掉即可
kill -9 pid                #pid为占用端口的进程id号
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报错二

ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-cluster/zookeeper-1/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Error contacting service. It is probably not running.

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解决

出现这个报错信息，需要去找zookeeper的日志log，去进一步分析问题原因
在Linux系统上操作，其他报错也一样，需要找对应工具（redis，rabbitmq等）的报错日志