GitHub user jmhublar edited a comment on the discussion: Replication broken 
after upgrade from 2.11.2 to 3.0.2

a closer look at some of the errors we're seeing on cluster_b 

```
        2024-11-07 09:34:29.197 
2024-11-07T14:34:29,197+0000 [pulsar-proxy-io-5-4] INFO  
org.apache.pulsar.proxy.server.ProxyConnection - [/10.191.236.49:64494] New 
connection opened
        
        
2024-11-07 09:34:29.198 
2024-11-07T14:34:29,198+0000 [pulsar-proxy-io-5-4] WARN  
org.apache.pulsar.proxy.server.ProxyConnection - [/10.191.236.49:64494] Unable 
to authenticate: 
        
        
2024-11-07 09:34:29.198 
javax.naming.AuthenticationException: No anonymous role, and no authentication 
provider configured
        
        
2024-11-07 09:34:29.198 
        at 
org.apache.pulsar.proxy.server.ProxyConnection.lambda$handleConnect$8(ProxyConnection.java:635)
 ~[org.apache.pulsar-pulsar-proxy-3.0.7.jar:3.0.7]
        
        
2024-11-07 09:34:29.198 
        at java.util.Optional.orElseThrow(Optional.java:403) ~[?:?]
        
        
2024-11-07 09:34:29.198 
        at 
org.apache.pulsar.proxy.server.ProxyConnection.handleConnect(ProxyConnection.java:634)
 ~[org.apache.pulsar-pulsar-proxy-3.0.7.jar:3.0.7]
        
        
2024-11-07 09:34:29.198 
        at 
org.apache.pulsar.common.protocol.PulsarDecoder.channelRead(PulsarDecoder.java:182)
 ~[org.apache.pulsar-pulsar-common-3.0.7.jar:3.0.7]
        
        
2024-11-07 09:34:29.198 
        at 
org.apache.pulsar.proxy.server.ProxyConnection.channelRead(ProxyConnection.java:271)
 ~[org.apache.pulsar-pulsar-proxy-3.0.7.jar:3.0.7]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
 ~[io.netty-netty-codec-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
 ~[io.netty-netty-codec-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:289)
 ~[io.netty-netty-handler-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.handler.flush.FlushConsolidationHandler.channelRead(FlushConsolidationHandler.java:152)
 ~[io.netty-netty-handler-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1357)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:868)
 ~[io.netty-netty-transport-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:799)
 ~[io.netty-netty-transport-classes-epoll-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:501) 
~[io.netty-netty-transport-classes-epoll-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:399) 
~[io.netty-netty-transport-classes-epoll-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
 ~[io.netty-netty-common-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) 
~[io.netty-netty-common-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at 
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
 ~[io.netty-netty-common-4.1.113.Final.jar:4.1.113.Final]
        
        
2024-11-07 09:34:29.198 
        at java.lang.Thread.run(Thread.java:840) ~[?:?]
        
        
2024-11-07 09:34:29.198 
2024-11-07T14:34:29,198+0000 [pulsar-proxy-io-5-4] INFO  
org.apache.pulsar.proxy.server.ProxyConnection - [/10.191.236.49:64494] 
Connection closed
```

GitHub link: 
https://github.com/apache/pulsar/discussions/23558#discussioncomment-11171592

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