linux 启动nacos报错_linux下启动Nacos报错解决：which: no javac in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/

Posted 2021-08-09 最小的帆也能远航

报错信息：

which: no javac in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin)

readlink: missing operand

Try 'readlink --help' for more information.

dirname: missing operand

Try 'dirname --help' for more information.

ERROR: Please set the JAVA_HOME variable in your environment, We need java(x64)! jdk8 or later is better! !!

查找原因：

输入echo $JAVA_HOME结果为空，说明没有配置java环境变量

解决办法：

配置JAVA环境变量

1.找到jdk安装路径

[root@localhost bin]# ls -lrt /usr/bin/java

lrwxrwxrwx 1 root root 22 Mar 15 09:59 /usr/bin/java -> /etc/alternatives/java

[root@localhost bin]# ls -lrt /etc/alternatives/java

lrwxrwxrwx 1 root root 73 Mar 15 09:59 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/jre/bin/java

[root@localhost bin]# cd /usr/lib/jvm

[root@localhost jvm]# ll

total 4

drwxr-xr-x 3 root root 4096 Mar 15 09:59 java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64

lrwxrwxrwx 1 root root 21 Mar 15 09:59 jre -> /etc/alternatives/jre

lrwxrwxrwx 1 root root 27 Mar 15 09:59 jre-1.8.0 -> /etc/alternatives/jre_1.8.0

lrwxrwxrwx 1 root root 35 Mar 15 09:59 jre-1.8.0-openjdk -> /etc/alternatives/jre_1.8.0_openjdk

lrwxrwxrwx 1 root root 51 Mar 15 09:59 jre-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64 -> java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/jre

lrwxrwxrwx 1 root root 29 Mar 15 09:59 jre-openjdk -> /etc/alternatives/jre_openjdk

2.在/etc/profile文件下添加以下代码并执行

export JAVA_HOME=/usr/lib/jvm/jre-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/

export JRE_HOME=$JAVA_HOME/jre

export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH

export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

[root@localhost ~]# source /etc/profile

3.重新执行nacos启动脚本：

[root@localhost bin]# ./startup.sh 

/usr/lib/jvm/jre-1.8.0-openjdk-1.8.0.275.b01-1.el8_3.x86_64//bin/java  -server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/mynacos/nacos/logs/java_heapdump.hprof -XX:-UseLargePages -Djava.ext.dirs=/usr/lib/jvm/jre-1.8.0-openjdk-1.8.0.275.b01-1.el8_3.x86_64//jre/lib/ext:/usr/lib/jvm/jre-1.8.0-openjdk-1.8.0.275.b01-1.el8_3.x86_64//lib/ext:/mynacos/nacos/plugins/cmdb:/mynacos/nacos/plugins/mysql -Xloggc:/mynacos/nacos/logs/nacos_gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -Dnacos.home=/mynacos/nacos -Dloader.path=/mynacos/nacos/plugins/health -jar /mynacos/nacos/target/nacos-server.jar  --spring.config.location=classpath:/,classpath:/config/,file:./,file:./config/,file:/mynacos/nacos/conf/ --logging.config=/mynacos/nacos/conf/nacos-logback.xml --server.max-http-header-size=524288
nacos is starting with cluster
nacos is starting，you can check the /mynacos/nacos/logs/start.out

说明启动成功！可以到logs下查看日志。