clay-f commented on issue #2655:
URL: https://github.com/apache/rocketmq/issues/2655#issuecomment-773009199


   download rocketmq4.8.0 from 
[apache](https://www.apache.org/dyn/closer.cgi?path=rocketmq/4.8.0/rocketmq-all-4.8.0-source-release.zip).
   
   start broker and nameserver will get error.
   
   system: macOS 11.2
   
   run mqnameserv
   
        nohup sh bin/mqnamesrv &
   
   get error
   
       
-Djava.ext.dirs=/Library/Java/JavaVirtualMachines/jdk-11.0.10.jdk/Contents/Home/jre/lib/ext:/usr/local/opt/rocketmq/bin/../lib:/Library/Java/JavaVirtualMachines/jdk-11.0.10.jdk/Contents/Home/lib/ext
 is not supported. 
       Use -classpath instead.
       Error: Could not create the Java Virtual Machine.
       Error: A fatal exception has occurred. Program will exit.
   
   run broker
   
       nohup sh bin/mqbroker -n localhost:9876 &
   
   get error
   
       [0.004s][warning][gc] -Xloggc is deprecated. Will use 
-Xlog:gc:/Volumes/RAMDisk/rmq_broker_gc_%p_%t.log instead.
       Unrecognized VM option 'PrintGCDateStamps'
       Error: Could not create the Java Virtual Machine.
       Error: A fatal exception has occurred. Program will exit.
     
   


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