@Neha Pawar @Alexander Pucher @Ting Chen kindly suggest for one of the instance it's taking 8008 port is there any way to fixed it. I have checked configuration files.but couldn't find to update this pinot.server.netty.port value as 8098. I am not able to understand from where for one of the instance this is taking value as 8008 instead of 8098. I have restarted everything but still it's taking this value.

Is it possible that at some point you had a server runing with 8008? If that server is still registered in Helix you might have to manually clean it in Zookeeper.

Yes earlier it for one of the server manulaay I changed it to 8008 .but after that I restarted everything.

Can you trash everything and restart? Including your data dirs.