[lttng-dev] unable to add callstack-user context

Evan Galea evanjamesgalea at gmail.com
Fri Jul 9 04:30:48 EDT 2021

Hi there, I'm a little new to lttng and tracing in general. I am using a
Java Userspace agent, which is working well, but I am having trouble adding
callstack context to my tracing channels. I'm not sure if it's relevant but
running 'lttng add-context --list" shows callstack-user in the list.

the commands I input are:

lttng create
lttng enable-channel --userspace mychannel
lttng enable-event --userspace --all --channel mychannel
lttng add-context --userspace --channel mychannel --type callstack-user
>Error: callstack-user: UST invalid context

When I run the following command instead:
lttng add-context --userspace --channel mychannel --type vpid

I am able to get it to work and I see vpid appear in my traces. Are there
any other things I need to set up first to be able to use it?

also, are there any commands that can list the per-domain contexts
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