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boundary="===============2051222145675919907==" Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" --===============2051222145675919907== Content-Language: en-CA Content-Type: multipart/alternative; boundary="_000_YT2PR01MB598409B4EB4A498DFDF47B5EBCBC9YT2PR01MB5984CANP_" --_000_YT2PR01MB598409B4EB4A498DFDF47B5EBCBC9YT2PR01MB5984CANP_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Adel, The java tracing facilities make use of an agent that communicates with the= session deamon through a TCP socket. You must to ensure your java applicat= ion can connect to the session daemon's 'agent-tcp-port'. https://lttng.org/man/8/lttng-sessiond/v2.13/#doc-opt--agent-tcp-port Is that port properly exposed by your container configuration? J=E9r=E9mie -- J=E9r=E9mie Galarneau EfficiOS Inc. https://www.efficios.com ________________________________ From: lttng-dev on behalf of Adel Belkh= iri via lttng-dev Sent: March 15, 2023 20:03 To: lttng-dev@lists.lttng.org Subject: [lttng-dev] Tracing a docker containerized java application from t= he host Hello everyone, I am reaching out to seek assistance in tracing an instrumented Java applic= ation running within a Docker container from the host side. In my setup, the LTTng session daemon, running on the host side, indicates = that application registration has been completed (please refer to the logs)= . However, when running the command "lttng list --jul," no registered appli= cations are displayed. Although the application successfully creates the "L= ttngLogHandler" object and attaches it to the logger, no traces are generat= ed. To allow the application to access the lttng socket file, the host's /var/r= un/lttng directory is shared with the container at launch (using the comman= d "sudo docker run -p 8080:8080 -v /var/run/lttng:/var/run/lttng sample-ima= ge"). I am only interested in collecting userspace Java (--jul) traces. I would greatly appreciate any assistance or guidance that you can provide.= Thank you for your time. Additional details include: Ubuntu 22.04 Kernel: 5.15.0-60-generic LTTng session daemon version: 2.13.2 Docker version 20.10.21, build 20.10.21-0ubuntu1~22.04.2 Regards, Adel Belkhiri --_000_YT2PR01MB598409B4EB4A498DFDF47B5EBCBC9YT2PR01MB5984CANP_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Adel,

The java tracing facilities make use of an agent that communicates with the= session deamon through a TCP socket. You must to ensure your java applicat= ion can connect to the session daemon's 'agent-tcp-port'.

https://lttng.org/man/8/lttng-sessiond/v= 2.13/#doc-opt--agent-tcp-port

Is that port properly exposed by your container configuration?

J=E9r=E9mie

--
J=E9r=E9mie Galarneau
From: lttng-dev <lttng-d= ev-bounces@lists.lttng.org> on behalf of Adel Belkhiri via lttng-dev <= ;lttng-dev@lists.lttng.org>
Sent: March 15, 2023 20:03
To: lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org>
Subject: [lttng-dev] Tracing a docker containerized java application= from the host
 
Hello everyone,

I am reaching out to seek assistance in tracing an instrumented Java applic= ation running within a Docker container from the host side.

In my setup, the LTTng session daemon, running on the host side, indicates = that application registration has been completed (please refer to the logs)= . However, when running the command "lttng list --jul," no regist= ered applications are displayed. Although the application successfully creates the "LttngLogHandler" objec= t and attaches it to the logger, no traces are generated.

To allow the application to access the lttng socket file, the host's /var/r= un/lttng directory is shared with the container at launch (using the comman= d "sudo docker run -p 8080:8080 -v /var/run/lttng:/var/run/lttng sampl= e-image"). I am only interested in collecting userspace Java (--jul) traces.

I would greatly appreciate any assistance or guidance that you can provide.= Thank you for your time.

Additional details include:

Ubuntu 22.04
Kernel: 5.15.0-60-generic
LTTng session daemon version: 2.13.2
Docker version 20.10.21, build 20.10.21-0ubuntu1~22.04.2
Regards,
Adel Belkhiri 
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