rocketmq启动mqnamesrv报错解决

今天用安装配置rocketmq-3.2.6的方式配置rocketmq-3.5.8

结果输入 nohup sh mqnamesrv & 报错：Could not find or load main class com.alibaba.rocketmq.namesrv.NamesrvStartup

检查了环境变量始终没排除错误，最终知晓安装rocketmq-3.5.8要先编译（笑哭）

以下转自：http://www.fx114.net/qa-37-152744.aspx （谷歌浏览器会危险屏蔽网址）

1：在安装mq之前先确保安装了以下软件 不然会在编译时报 git，mvn命令找不到，这几个文件均安装在 /usr/local下

             git-2 13.1.tar.gz             apache-maven-3.5.0-bin.tar.gz             RocketMQ-3.5.8.tar.gz             jdk-8u131-linux-x64.tar.gz

2 ：安装完 jdk和maven之后再/ect/profile中配置环境变量 执行 source /etc/profile 使得环境变量生效

export JAVA_HOME=/usr/local/jdk1.8.0_131export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarMAVEN_HOME=/usr/local/apache-maven-3.5.0export MAVEN_HOMEexport PATH=${PATH}:${MAVEN_HOME}/bin

3：将rocketMQ解压到/usr/local/rockemq-source下，解压过后在/usr/local/rockemq-source/RocketMQ-3.5.8/下执行命令 sh Install.sh 进行编译

4：配置mq的环境变量并使其生效

echo "ROCKETMQ_HOME=`pwd`" >> ~/.bash_profilesource ~/.bash_profile 

我查看了下./bash_profile中写入的配置（/root文件夹下用 ls -al命令查看）

PATH=$PATH:$HOME/binexport PATHROCKETMQ_HOME=/usr/local/rockemq-source/RocketMQ-3.5.8/devenv

5：启动 mqnameserver

nohup sh mqnamesrv &

注意启动时报错如下:

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=320m; support was removed in 8.0Java HotSpot(TM) 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.Error: Could not find or load main class com.alibaba.rocketmq.namesrv.NamesrvStartup

不能加载启动类说明配置mq环境变量不对，我之前是在/ect/profile文件中配置的环境变量死活报这个错 后来改成了【步骤四】设置mq环境变量的方式就好使了，当然也可以参考下面链接分析这个问题
https://stackoverflow.com/questions/43709352/rocketmq-nameserver-start-error-could-not-find-or-load-main-class

再次启动报如下错误:

java.lang.ExceptionInInitializerError    at com.alibaba.rocketmq.namesrv.NamesrvStartup.main0(NamesrvStartup.java:103)    at com.alibaba.rocketmq.namesrv.NamesrvStartup.main(NamesrvStartup.java:51)Caused by: java.lang.RuntimeException: InetAddress java.net.InetAddress.getLocalHost() throws UnknownHostExceptionSee http://docs.aliyun.com/cn#/pub/ons/faq/exceptions&unknown_host for further details.    at com.alibaba.rocketmq.common.MixAll.localhost(MixAll.java:433)    at com.alibaba.rocketmq.common.MixAll.<clinit>(MixAll.java:67)    ... 2 moreCaused by: java.net.UnknownHostException: nginx57: nginx57: Name or service not known    at java.net.InetAddress.getLocalHost(InetAddress.java:1505)    at com.alibaba.rocketmq.common.MixAll.localhost(MixAll.java:429)    ... 3 moreCaused by: java.net.UnknownHostException: nginx57: Name or service not known    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)    at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)    at java.net.InetAddress.getLocalHost(InetAddress.java:1500)    ... 4 more

这个问题是由于/etc/sysconfig/network 中的记录的hostname和/etc/hosts中的主机名绑定不一致造成的改成一样的就行如图所示：
network文件配置

NETWORKING=yes
HOSTNAME=nginx57
hosts文件配置

127.0.0.1  nginx57 ::1        localhost localhost.localdomain localhost7 localhost7.localdomain7

再次重新启动启动成功

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=320m; support was removed in 8.0Java HotSpot(TM) 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.The Name Server boot success. serializeType=JSON

6：启动mqbroker

nohup sh mqbroker -n localhost:9876 autoCreateTopicEnable=true &

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=320m; support was removed in 8.0Java HotSpot(TM) 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.Java HotSpot(TM) 64-Bit Server VM warning: Cannot open file /root/tmpfs/logs/gc.log due to No such file or directoryThe broker[nginx57, 192.168.100.57:10911] boot success. serializeType=JSON and name server is localhost:9876

7：查看是否启动正常

ps aux | grep java

root      7894  0.1  1.5 6327268 127820 pts/0  Sl   Jun27   2:12 /usr/local/jdk1.8.0_131/bin/java -server -Xms4g -Xmx4g -Xmn2g -XX:PermSize=128m -XX:MaxPermSize=320m -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+CMSClassUnloadingEnabled -XX:SurvivorRatio=8 -XX:+DisableExplicitGC -verbose:gc -Xloggc:/root/rmq_srv_gc.log -XX:+PrintGCDetails -XX:-OmitStackTraceInFastThrow -Djava.ext.dirs=/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin/../lib -cp .:/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin/../conf:.:/usr/local/jdk1.8.0_131/lib/tools.jar:/usr/local/jdk1.8.0_131/lib/dt.jar com.alibaba.rocketmq.namesrv.NamesrvStartuproot      8174 36.0  7.3 6313384 593116 pts/0  Sl   14:25   7:18 /usr/local/jdk1.8.0_131/bin/java -server -Xms4g -Xmx4g -Xmn2g -XX:PermSize=128m -XX:MaxPermSize=320m -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+CMSClassUnloadingEnabled -XX:SurvivorRatio=8 -XX:+DisableExplicitGC -verbose:gc -Xloggc:/root/tmpfs/logs/gc.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:-OmitStackTraceInFastThrow -XX:+AlwaysPreTouch -Djava.ext.dirs=/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin/../lib -cp .:/usr/local/rockemq-source/RocketMQ-3.5.8/devenv/bin/../conf:.:/usr/local/jdk1.8.0_131/lib/tools.jar:/usr/local/jdk1.8.0_131/lib/dt.jar com.alibaba.rocketmq.broker.BrokerStartup -n localhost:9876 autoCreateTopicEnable=true