logstash：which: no java in (/sbin:/bin:/usr/sbin:/usr/bin) could not find java； set JAVA

其实就是没有java环境，安装一下即可
1.下载

[root@test ~] wget -P /usr/local/src  https://infra-res-1251220924.cos.ap-guangzhou.myqcloud.com/java/jdk-8u261-linux-x64.rpm;

2.解压安装

[root@test ~] cd /usr/local/src  && rpm -ivh jdk-8u261-linux-x64.rpm

3.查看版本

[root@test ~] java -version
[root@test ~] echo $JAVA_HOME

4.查找java路径

[root@test ~] which java
[root@test ~] ls -lrt /bin/java
[root@test ~] ls -lrt /etc/alternatives/java

5.设置JAVA_HOME

[root@test ~] vim ~/.bash_profile
export JAVA_HOME=/usr/java/jdk1.8.0_261-amd64/bin/java #这里可能会不一样

6.配置生效

[root@test ~] source  ~/.bash_profile