Spring Webflux - 使用 Webflux webclient 时未显示记录连接 ID 和新连接日志

Question

Many tutorials online are pointing out the importance of having connection ID in a Spring Webflux application.

For instance, see this screenshot taken from a presentation in a conference.

However, I am not getting those IDs. I can only see the part with the time, up until the [ctor-http-nio5].

I cannot see the connection ID, I cannot see the statement "New http connection"

What can be the root cause of me not being able to display such? I really would like to see those interesting logs.

Thank you for your help

Answer 1

This ID is unique for each of the connections made to your server and you can extract it by calling the getLogPrefix() method of ServerWebExchange class and can append it to your logs by directly or by putting it to the MDC.

By default spring framework logs this id in the framework logs. These framework logs are at the DEBUG level so you need to enable debug level to see the logs with ids. By adding the following configuration to the application.properties you can see the logs with ids.

logging.level.org.springframework=DEBUG