LTTng » LTTng-tools

Steps:

lttng create a
lttng enable-event -p a,b,c
lttng list a

Everything okay so far:

=== Domain: Python (logging) ===

Events (Logger name):
---------------------
    - a [enabled] (loglevel: PYTHON_DEBUG)
    - c [enabled] (loglevel: PYTHON_DEBUG)
    - b [enabled] (loglevel: PYTHON_DEBUG)

Enable one event in a second agent domain:

lttng enable-event -j d
lttng list a

Result:

=== Domain: JUL (Java Util Logging) ===

Events (Logger name):
---------------------
    - a [enabled] (loglevel: UNKNOWN)
    - c [enabled] (loglevel: UNKNOWN)
    - b [enabled] (loglevel: UNKNOWN)

=== Domain: Python (logging) ===

Events (Logger name):
---------------------
    - a [enabled] (loglevel: PYTHON_DEBUG)
    - c [enabled] (loglevel: PYTHON_DEBUG)
    - b [enabled] (loglevel: PYTHON_DEBUG)

It looks like events from the first domain (Python) are copied to the second domain (JUL) and the JUL events get an UNKNOWN log level.

The other way around does the same:

lttng create a
lttng enable-event -j jul
lttng list a
lttng enable-event -p python
lttng list a

Result:

=== Domain: Python (logging) ===

Events (Logger name):
---------------------
    - jul [enabled] (loglevel: UNKNOWN)

=== Domain: JUL (Java Util Logging) ===

Events (Logger name):
---------------------
    - jul [enabled] (loglevel: JUL_ALL)

It might be just a listing problem, because I cannot disable the Python jul event here:

Error: Event jul: UST event not found (channel channel0, session a)

However, I can disable the JUL jul event, and both seem disabled afterwards:

=== Domain: Python (logging) ===

Events (Logger name):
---------------------
    - jul [disabled] (loglevel: UNKNOWN)

=== Domain: JUL (Java Util Logging) ===

Events (Logger name):
---------------------
    - jul [disabled] (loglevel: JUL_ALL)

I'm using:

lttng (LTTng Trace Control) 2.8.0-pre - Herbe à Détourne - v2.7.0-rc1-75-g2137586