dao-jun commented on PR #23165: URL: https://github.com/apache/pulsar/pull/23165#issuecomment-2287923950
> When the Pulsar value is greater than the OS value, the `listen` method will use the minimum value. > > Pulsar OS Final > 1024 128 128 > 1024 4096 1024 > Please see https://man7.org/linux/man-pages/man2/listen.2.html > > > If the backlog argument is greater than the value in > > /proc/sys/net/core/somaxconn, then it is silently capped to that > > value. Since Linux 5.4, the default in this file is 4096; in > > earlier kernels, the default value is 128. Before Linux 2.4.25, > > this limit was a hard coded value, SOMAXCONN, with the value 128. > > Do you consider this case? Oh, thanks for reminding me, I don't notice the case before. However, netty still has a chance to failed read SO_BACKLOG from `/proc/sys/net/core/somaxconn`, when this exception happens, the SO_BACKLOG value will default set to 128. see: https://github.com/netty/netty/issues/4936 https://github.com/netty/netty/blob/4.1/common/src/main/java/io/netty/util/NetUtil.java#L170 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
