LTTng bugs repository

04/01/2026

KS 10:41 AM LTTng-UST Bug #1438: Big memory usage when RLIMIT_NOFILE is high

Hi Romain,
thanks for the very clear report! Some folks here are taking a look at this.
thanks,
kienan Kienan Stewart

02/18/2026

KS 10:25 AM LTTng-tools Bug #1436 (Resolved): tests/regression/tools/trace-format/kernel-local-trace-pretty.expect.32 not included in release tarballs

Hi Alexander,
the fix has been merged into the master branch (https://github.com/lttng/lttng-tools/commit/f6f8f5054f74c27b7939ec94bb0c1a873ed6d0c4), and will be backported into the next bugfix release.
thanks,
kienan Kienan Stewart

02/16/2026

KS 01:29 PM LTTng-tools Bug #1436 (In Progress): tests/regression/tools/trace-format/kernel-local-trace-pretty.expect.32 not included in release tarballs

Hi Alexander,
thanks for the bug report!
Here's my proposed patch: https://review.lttng.org/c/lttng-tools/+/16647
thanks,
kienan Kienan Stewart

10/15/2025

KS 02:36 PM LTTng-modules Revision 623b5622 (lttng-modules): Fix: Set CTF version in metadata packet headers for CTF2

Observed issue
==============
When tracing with a session configured to use CTF2, the metadata
packet header still contains CTF major 1 and minor 8.
Solution
========
Use the session's configured output format to decide the values to ... Kienan Stewart

KS 11:13 AM LTTng-tools Revision 2da7c0b6 (lttng-tools): sessiond: Handle session not found without exception

Observed Issue
==============
When starting lttng-sessiond with automatically loaded sessions,
warnings are emitted.
```
Warning: Client request failed: Target session of command doesn't exist: command='STOP_TRACE', location='process_c... Kienan Stewart

KS 11:13 AM LTTng-tools Revision 94ba5e5a (lttng-tools): sessiond: Allow the log level for nested exceptions to be set

Change-Id: Iea81e3e783e0af5d96a081249b8f5c51b5307c70
Signed-off-by: Kienan Stewart <kstewart@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com> Kienan Stewart

KS 11:12 AM LTTng-tools Revision 95f7b00d (lttng-tools): common: Adding PRINT_INFO log level

Change-Id: Ia3f3e7becfb24e93f63806e2e056b356e55a7199
Signed-off-by: Kienan Stewart <kstewart@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com> Kienan Stewart

10/14/2025

KS 01:55 PM LTTng-tools Revision b3301df7 (lttng-tools): tests: Fix `skip_all` during missing platform requirements

Error when skipping tests:
kernel//../../utils/tap/tap.sh: line 434: skip_all: command not found
# Looks like your test died before it could output anything.
Change-Id: I03f923f3099571db6b0801d02dc0c05e2cdb83de
Signed-off-by: K... Kienan Stewart

10/10/2025

KS 04:42 PM LTTng-tools Revision 35e337ca (lttng-tools): tests: Fix default `missing_platform_requirement` action in bash tests

Change-Id: Idaeab5cc911a7418d8c5a13e59429b8eefb0ab1f
Signed-off-by: Kienan Stewart <kstewart@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com> Kienan Stewart

KS 03:39 PM LTTng-tools Revision 3b10b1ca (lttng-tools): Fix: Load sessions with UST sub-domains

Observed issue
==============
Some saved sessions fail to load, although the `lttng load` command
returns success.
```
$ lttng load /tmp/tmp.BQmHPTtJHD/saved_trace.lttng
Session /tmp/tmp.BQmHPTtJHD/saved_trace.lttng has been loaded suc... Kienan Stewart