I'd like to add that both "lttng list -u" and "lttng list $session_name" can get those tracepoints' names... ------------------------------------------------------------------ 发件人：zhenyu.ren via lttng-dev 发送时间：2020年7月1日(星期三) 11:05 收件人：lttng-dev ; mathieu.desnoyers 主　题：[lttng-dev] some tracepoints not exist in metadata? Hi, I find sometimes there are some tracepoints not exist in metadata file(but they are in the list of lttng list -u) and the end result is they can NOT be logged. I can not always reproduce it. It bothered me for 2 days. The lttng version is 2.7, I know it is not the latest version but there are some reasons I can't update it. So, is this a known bug? If yes, It will be very appreciated if you can give me any advice about the bug info(I can cherry pick the correspond fix). Otherwise, maybe I have to give up my favoriate Lttng.... Thank you in advance! zhenyu.ren