RocketMq 启动报错错误: 找不到或无法加载主类 Files\Java\jdk1.8.0_301\jre\lib\ext

问题原因分析

实际上调用的是runserver.cmd

runserver源码如下

这里引用了JAVA_HOME环境变量

而我的环境变量 Program Files正好对应了错误找不到或无法加载主类 Files\Java\jdk1.8.0_301

问题就在于Program Files中间的空格,那么找到问题就好解决了.

解决方案

将原来的JAVA_HOME 替换成字符串

原runserver.cmd

改为

@echo off
rem Licensed to the Apache Software Foundation (ASF) under one or more
rem contributor license agreements.  See the NOTICE file distributed with
rem this work for additional information regarding copyright ownership.
rem The ASF licenses this file to You under the Apache License, Version 2.0
rem (the "License"); you may not use this file except in compliance with
rem the License.  You may obtain a copy of the License at
rem
rem     http://www.apache.org/licenses/LICENSE-2.0
rem
rem Unless required by applicable law or agreed to in writing, software
rem distributed under the License is distributed on an "AS IS" BASIS,
rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rem See the License for the specific language governing permissions and
rem limitations under the License.


set JAVAHOME="%JAVA_HOME%"
if not exist "%JAVA_HOME%\bin\java.exe" echo Please set the JAVA_HOME variable in your environment, We need java(x64)! & EXIT /B 1
set "JAVA=%JAVA_HOME%\bin\java.exe"

setlocal

set BASE_DIR=%~dp0
set BASE_DIR=%BASE_DIR:~0,-1%
for %%d in (%BASE_DIR%) do set BASE_DIR=%%~dpd

set CLASSPATH=.;%BASE_DIR%conf;%CLASSPATH%

set "JAVA_OPT=%JAVA_OPT% -server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m"
set "JAVA_OPT=%JAVA_OPT% -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+CMSClassUnloadingEnabled -XX:SurvivorRatio=8 -XX:-UseParNewGC"
set "JAVA_OPT=%JAVA_OPT% -verbose:gc -Xloggc:"%USERPROFILE%\rmq_srv_gc.log" -XX:+PrintGCDetails -XX:+PrintGCDateStamps"
set "JAVA_OPT=%JAVA_OPT% -XX:-OmitStackTraceInFastThrow"
set "JAVA_OPT=%JAVA_OPT% -XX:-UseLargePages"
set "JAVA_OPT=%JAVA_OPT% -Djava.ext.dirs=%BASE_DIR%lib;%JAVAHOME%\jre\lib\ext"
set "JAVA_OPT=%JAVA_OPT% -cp "%CLASSPATH%""

"%JAVA%" %JAVA_OPT% %*

关键点在于

问题解决

启动成功

这里java_home
class_path
path 里面都不能有空格

但是逐一修改太笨了,只新增一个javahome的变量即可解决问题.

rocketmq的路径也不能有空格,解决方法也可以添加变量