:farmer: check_msgs_launch_test failing in kilted by a python package not importing site module

[miguelgonrod]

Generated by Generative AI

No response

Operating System:

Ubuntu Noble

ROS version or commit hash:

Kilted

RMW implementation (if applicable):

rmw_zenoh, cyclonedds

RMW Configuration (if applicable):

No response

Client library (if applicable):

rclcpp

'ros2 doctor --report' output

No response

Steps to reproduce issue

1. go to any of the jobs listed below
2. Build a Job
3. See test regressions

Expected behavior

To build without test regressions

Actual behavior

Building with test regressions

Additional information

Reference Builds

• Kci__nightly-zenoh_ubuntu_noble_amd64#109
• Kci__nightly-cyclonedds_ubuntu_noble_amd64#109

Failing Tests

• launch_testing_examples.launch_testing_examples.check_msgs_launch_test.launch_testing_examples.check_msgs_launch_test

Log Output

35: OK
35: [INFO] [python3-14]: sending signal 'SIGINT' to process[python3-14]
35: [python3-14] Fatal Python error: init_import_site: Failed to import the site module
35: [python3-14] Python runtime state: initialized
35: [python3-14] Traceback (most recent call last):
35: [python3-14]   File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
35: [python3-14]   File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
35: [python3-14]   File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
35: [python3-14]   File "<frozen importlib._bootstrap>", line 1176, in exec_module
35: [python3-14]   File "<frozen site>", line 643, in <module>
35: [python3-14]   File "<frozen site>", line 630, in main
35: [python3-14]   File "<frozen site>", line 413, in addsitepackages
35: [python3-14]   File "<frozen site>", line 242, in addsitedir
35: [python3-14]   File "<frozen site>", line 201, in addpackage
35: [python3-14]   File "<string>", line 1, in <module>
35: [python3-14]   File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
35: [python3-14]   File "<frozen importlib._bootstrap>", line 1322, in _find_and_load_unlocked
35: [python3-14]   File "<frozen importlib._bootstrap>", line 1262, in _find_spec
35: [python3-14]   File "<frozen importlib._bootstrap_external>", line 1528, in find_spec
35: [python3-14]   File "<frozen importlib._bootstrap_external>", line 1502, in _get_spec
35: [python3-14]   File "<frozen importlib._bootstrap_external>", line 1605, in find_spec
35: [python3-14]   File "<frozen importlib._bootstrap_external>", line 1648, in _fill_cache
35: [python3-14] KeyboardInterrupt
35: [ERROR] [python3-14]: process has died [pid 292555, exit code 1, cmd '/usr/bin/python3 -c 
35: import signal
35: import time
35: 
35: try:
35:     while True:
35:         time.sleep(1)
35: except KeyboardInterrupt:
35:     pass
35: '].
35: test_process_terminates_as_expected[garbage, rmw_zenoh_cpp] (rcl.TestRMWImplementationIDCheckAfterShutdown.test_process_terminates_as_expected[garbage, rmw_zenoh_cpp])
35: Test that the executable under test terminates as expected. ... ok

Flakyness 15 days

job_name	last_fail	first_fail	build_count	failure_count	failure_percentage
Kci__nightly-zenoh_ubuntu_noble_amd64	2026-03-31	2026-03-19	5	5	100.0
Kci__nightly-cyclonedds_ubuntu_noble_amd64	2026-03-31	2026-03-22	5	4	80.0
Rci__nightly-zenoh_ubuntu_noble_amd64	2026-03-30	2026-03-19	12	12	100.0

This error have been happenning for more than the jenkins history can save in memory, also even when it says 100% there are some builds that don't have this error.

CC: @Crola1702