It would be helpful to be able to abbreviate thread names for the same reasons that we like to abbreviate logger names.

Whereas logger

{x} splits on "." or "$", thread{x}

would at least split on "-". E.g.,

Conversion Specifier Thread name Result
%thread http-nio-8080-exec-15 http-nio-8080-exec-15
%thread

{0}

http-nio-8080-exec-15 15
%thread

{1}

http-nio-8080-exec-15 h-n-8-e-15
%thread

{5}

http-nio-8080-exec-15 http-nio-8080-exec-15

With respect to splitting on "-", I have also seen thread names that look like:

ajp-bio-/127.0.0.1-8009-exec-10

This would not split nicely on ".".