Error: JAVA_HOME is not set and java could not be found in PATH.
解决zookeeper集群通过脚本启动是出现的JAVA_HOME变量没配置的问题
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CSDN话题挑战赛第2期
参赛话题:学习笔记
目录
前言
因为zookeeper服务器多,每一次启动、关闭和查看状态都很麻烦,所以通过shell脚本启动zookeeper集群,写完的脚本如下:
#!/bin/bash
case $1 in
"start") {
for i in hadoop100 hadoop101 hadoop102
do
echo ----------------zookeeper $i 启动---------------------
ssh $i "/opt/module/zookeeper-3.5.7/bin/zkServer.sh start"
done
}
;;
"stop") {
for i in hadoop100 hadoop101 hadoop102
do
echo ----------------zookeeper$i 关闭---------------------
ssh $i "/opt/module/zookeeper-3.5.7/bin/zkServer.sh stop"
done
}
;;
"status") {
for i in hadoop100 hadoop101 hadoop102
do
echo ----------------zookeeper $i 状态---------------------
ssh $i "/opt/module/zookeeper-3.5.7/bin/zkServer.sh status"
done
}
;;
esac
问题
通过脚本开启三台服务器却报了以下错误:
[root@hadoop100 bin]# zk.sh start
----------------zookeeper hadoop100 启动---------------------
root@hadoop100's password:
Error: JAVA_HOME is not set and java could not be found in PATH.
----------------zookeeper hadoop101 启动---------------------
root@hadoop101's password:
Error: JAVA_HOME is not set and java could not be found in PATH.
----------------zookeeper hadoop102 启动---------------------
root@hadoop102's password:
Error: JAVA_HOME is not set and java could not be found in PATH.
解决办法:
在zookeeper安装包下的bin目录中添加上JAVA_HOME,配置上自己对应的jdk路径即可:
测试:
启动成功:
[root@hadoop100 bin]# zk.sh start
----------------zookeeper hadoop100 启动---------------------
root@hadoop100's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
----------------zookeeper hadoop101 启动---------------------
root@hadoop101's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
----------------zookeeper hadoop102 启动---------------------
root@hadoop102's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
查看状态
[root@hadoop100 bin]# zk.sh status
----------------zookeeper hadoop100 状态---------------------
root@hadoop100's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
----------------zookeeper hadoop101 状态---------------------
root@hadoop101's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader
----------------zookeeper hadoop102 状态---------------------
root@hadoop102's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower
关闭服务:
[root@hadoop100 bin]# zk.sh stop
----------------zookeeperhadoop100 关闭---------------------
root@hadoop100's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
----------------zookeeperhadoop101 关闭---------------------
root@hadoop101's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
----------------zookeeperhadoop102 关闭---------------------
root@hadoop102's password:
ZooKeeper JMX enabled by default
Using config: /opt/module/zookeeper-3.5.7/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED
问题解决完毕!
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