messense opened a new issue #3031:
URL: https://github.com/apache/rocketmq/issues/3031
**BUG REPORT**
1. Please describe the issue you observed:
`mqnamesrv` does not start on Apple Silicon macOS Big Sur.
- What did you do (The steps to reproduce)?
Download the latest binary release 4.9.0 and run `./mqnamesrv`
- What did you expect to see?
namesrv start successfully
- What did you see instead?
```
-Djava.ext.dirs=/Users/messense/.jenv/versions/16/jre/lib/ext:/Users/messense/Downloads/rocketmq-all-4.9.0-bin-release/bin/../lib:/Users/messense/.jenv/versions/16/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.
```
After make some modifications to migrate `java.ext.dirs` to classpath, it
errors with
```
java.lang.NoClassDefFoundError: Could not initialize class
io.netty.util.internal.PlatformDependent0
at
io.netty.util.internal.PlatformDependent.getSystemClassLoader(PlatformDependent.java:694)
at io.netty.channel.nio.NioEventLoop$4.run(NioEventLoop.java:171)
at
java.base/java.security.AccessController.doPrivileged(AccessController.java:312)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:167)
at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149)
at
io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:102)
at
io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:64)
at
io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
at
io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:70)
at
io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:65)
at
io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:56)
at
org.apache.rocketmq.remoting.netty.NettyRemotingServer.<init>(NettyRemotingServer.java:137)
at
org.apache.rocketmq.namesrv.NamesrvController.initialize(NamesrvController.java:80)
at
org.apache.rocketmq.namesrv.NamesrvStartup.start(NamesrvStartup.java:140)
at
org.apache.rocketmq.namesrv.NamesrvStartup.main0(NamesrvStartup.java:58)
at
org.apache.rocketmq.namesrv.NamesrvStartup.main(NamesrvStartup.java:51)
```
which seems like https://github.com/netty/netty/issues/4671 which is fixed
in https://github.com/netty/netty/pull/11202
2. Please tell us about your environment:
JDK 16 Apple Silicon macOS Big Sur.
3. Other information (e.g. detailed explanation, logs, related issues,
suggestions how to fix, etc):
Upgrading to `netty-all-4.1.65.Final.jar` fixed the error.
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