Is your handler panicking? If so there are also other issues to address, but you can test/quickfix this by deferring your decrement so it runs regardless:
atomic.AddInt64(&concur, 1) defer atomic.AddInt64(&concur, -1) h.ServeHTTP(w, r) -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
