Clojurians Log v2

@alexmiller @noisesmith @hiredman thanks for the reply, I finally found this was caused by an error raised in a go block(not thread macro). that's wired, in the thread tab I can see there're so many async-thread-macro thread didn't finish, staying in Park state.

I fixed the issue by catching the exception in go block.

@alexmiller my word async block means go block.