Flaky test on ros2topic: test_use_sim_time.TestROS2TopicUseSimTime.test_pub_times

[Crola1702]

Bug report

Required Info:

• Operating System:
  • Ubuntu 22.04 (Jammy)
• Installation type:
  • Source
• Version or commit hash:
  • Rolling
• DDS implementation:
  • All

Steps to reproduce issue

1. Wait for Ros2 ci nightlies to run
2. See test failure (Reference build here)

Expected behavior

Pass on all builds

Actual behavior

Failing in some builds (percentages for the last 2 weeks):

• nightly_linux_debug: 13.3% of the times
• nightly_linux_repeated: 6.6% of the times
• nightly_linux-rhel_debug: 33.3% of the times
• nightly_linux-rhel_release: 13.3% of the times
• nightly_linux-rhel_repeated: 13.3% of the times

Log output:

FAIL: test_use_sim_time.TestROS2TopicUseSimTime.test_pub_times
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/jenkins-agent/workspace/nightly_linux_debug/ws/install/launch_testing/lib/python3.10/site-packages/launch_testing/markers.py", line 57, in _wrapper
    return func(self, *args, **kwargs)
  File "/home/jenkins-agent/workspace/nightly_linux_debug/ws/src/ros2/ros2cli/ros2topic/test/test_use_sim_time.py", line 124, in test_pub_times
    assert command.wait_for_shutdown(timeout=1)
AssertionError: assert False
 +  where False = <bound method ProcessProxy.wait_for_shutdown of <launch_testing.tools.process.ProcessProxy object at 0x7f5f3fac0d60>>(timeout=1)
 +    where <bound method ProcessProxy.wait_for_shutdown of <launch_testing.tools.process.ProcessProxy object at 0x7f5f3fac0d60>> = <launch_testing.tools.process.ProcessProxy object at 0x7f5f3fac0d60>.wait_for_shutdown

Additional information

First failing build (for linux): https://ci.ros2.org/view/nightly/job/nightly_linux_repeated/2802/
First failing build (for rhel): https://ci.ros2.org/view/nightly/job/nightly_linux-rhel_debug/1279/

[Blast545]

Using scripting database tools, the first time it appeared in Rolling debug (30 days ago)

https://build.ros2.org/view/Rci/job/Rci__nightly-release_ubuntu_jammy_amd64/207/
https://ci.ros2.org/view/nightly/job/nightly_linux-rhel_debug/1268/

[Crola1702]

It happened today in rolling Debug build: Rolling nightly 242

[Crola1702]

It happened today in Linux Debug build: https://ci.ros2.org/view/nightly/job/nightly_linux_debug/

[Crola1702]

It happened today in Linux Release build: https://ci.ros2.org/view/nightly/job/nightly_linux_release/2459/

[Blast545]

This error was added with this PR: #754

[fujitatomoya]

this flaky test has been addressed for humble and foxy, i will close this issue.