🧑‍🌾 `ros2topic.ros2topic.test.test_bw_delay_hz.test_bw_delay_hz` failing in Kilted Zenoh

Generated by Generative AI

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Operating System:

Ubuntu Noble

ROS version or commit hash:

Kilted

RMW implementation (if applicable):

Zenoh

RMW Configuration (if applicable):

No response

Client library (if applicable):

No response

'ros2 doctor --report' output

No response

Steps to reproduce issue

1. Run a build in Kci Zenoh
2. See test regression fail

Expected behavior

Test should not fail

Actual behavior

Test is failing

Additional information

Reference build:

• Kci__nightly-zenoh_ubuntu_noble_amd64#35

Test regression:

• ros2topic.ros2topic.test.test_bw_delay_hz.test_bw_delay_hz

Log output:

FAIL: test_bw_delay_hz.TestROS2TopicBwDelayHz.test_bw_basic (topic='/clitest/topic/bw_compatible_qos', provide_qos=True, compatible_qos=True)
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/ws/src/ros2/ros2cli/ros2topic/test/test_bw_delay_hz.py", line 170, in helper_verb_basic
    assert re.search(success_regex, command.output, flags=re.MULTILINE), (
AssertionError: bw CLI did not print expected message
assert None
 +  where None = <function search at 0x79acf8335c60>('^[0-9]+ B/s from [0-9]+ messages$', 'WARNING: topic [/clitest/topic/bw_compatible_qos] does not appear to be published yet\n', flags=re.MULTILINE)
 +    where <function search at 0x79acf8335c60> = re.search
 +    and   'WARNING: topic [/clitest/topic/bw_compatible_qos] does not appear to be published yet\n' = <launch_testing.tools.process.ProcessProxy object at 0x79ace8107110>.output
 +    and   re.MULTILINE = re.MULTILINE

Last fail on Rolling was on 2025-07-08 (reference). Maybe we need to apply RMW Isolation? https://github.com/ros2/ros2cli/pull/1062

Start with ros2topic/test/test_bw_delay_hz.py, especially helper_verb_basic and the failing test output. Reproduce the Kilted Zenoh failure in the referenced Kci build and compare the expected bandwidth message with the warning shown in the log. Review the referenced RMW Isolation discussion; done means the test passes in the affected Zenoh build.