Netty Concurrent Request Issue

[satishver019]

Hi Team,

I am using netty TCP server to accept multiple remote TCP connections. I observed after few simultaneous parallel requests , netty TCP server doesn't respond

Do we have any parameter to configure in Netty TCP server which is supposed to accept multiple TCP connections as per the configured parameter ?

Right now, while bootstrapping the server, I have following setup

ServerBootstrap b = new ServerBootstrap();
b.group(new NioEventLoopGroup(1), new NioEventLoopGroup(20))
.channel(NioServerSocketChannel.class)
.handler(new LoggingHandler(LogLevel.DEBUG))
.childHandler(serverChannelInitializer);
b.option(ChannelOption.SO_BACKLOG, 100);

Please suggest...

[normanmaurer]

There is nothing more to configure here... Attach a profiler and check if you maybe block the EventLoop.

[satishver019]

Thanks. I would like to understand the implication of below two cases

ServerBootstrap b = new ServerBootstrap();

1. b.group(new NioEventLoopGroup(1), new NioEventLoopGroup(20)

vs

2. b.group(new NioEventLoopGroup()) //Does it handle concurrency in much smarter way than above point 1.

[normanmaurer]

The 1) will use a dedicated thread for just accepting connections while the 2) will share the accepting thread also with the accepted channels. Most of the time 2) is a good start

[satishver019]

Thanks Norman.