Bug#1079982: pytango: flaky autopkgtest: multiple issues

[Paul Gevers]

Source: pytango
Version: 9.5.0-5
Severity: serious
User: debian-ci at lists.debian.org
Usertags: flaky

Dear maintainer(s),

I looked at the results of the autopkgtest of your package because it 
was blocking the migration of glibc. I noticed that it regularly fails, 
the two logs I checked and copied below show different issues.

Because the unstable-to-testing migration software now blocks on
regressions in testing, flaky tests, i.e. tests that flip between
passing and failing without changes to the list of installed packages,
are causing people unrelated to your package to spend time on these
tests.

Don't hesitate to reach out if you need help and some more information
from our infrastructure.

Paul

https://ci.debian.net/packages/p/pytango/testing/amd64/51094511/

111s =================================== FAILURES 
===================================
111s ______________ test_nested_single_device_in_same_process_failure 
_______________
111s :-1: running the test CRASHED with signal 11


https://ci.debian.net/packages/p/pytango/testing/armhf/51094505/

256s =================================== FAILURES 
===================================
256s ___________________ test_subscribe_change_event[Synchronous] 
___________________
256s event_device = EventDevice(test/nodb/eventdevice)
256s
256s     def test_subscribe_change_event(event_device):
256s         results_change_event = []
256s
256s         def callback_change(evt):
256s             results_change_event.append(evt.attr_value.value)
256s
256s         # Subscribe to change event
256s         eid_change = event_device.subscribe_event(
256s             "attr", EventType.CHANGE_EVENT, callback_change, wait=True
256s         )
256s         assert eid_change == 1
256s
256s         # Trigger an event
256s         event_device.command_inout("send_change_event", wait=True)
256s         # Wait for tango event
256s         for retry_count in range(MAX_RETRIES):
256s             event_device.read_attribute("state", wait=True)
256s             if len(results_change_event) > 1:
256s                 break
256s             time.sleep(DELAY_PER_RETRY)
256s         if retry_count + 1 >= MAX_RETRIES:
256s             timeout_seconds = retry_count * DELAY_PER_RETRY
256s >           pytest.fail(
256s                 f"Timeout, waiting for event, after 
{timeout_seconds}sec over {MAX_RETRIES} retries. Occasionally happens, 
probably due to CI test runtime environment"
256s             )
256s E           Failed: Timeout, waiting for event, after 
39.800000000000004sec over 200 retries. Occasionally happens, probably 
due to CI test runtime environment
256s
256s tests/test_event.py:121: Failed
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature.asc
Type: application/pgp-signature
Size: 495 bytes
Desc: OpenPGP digital signature
URL: <http://alioth-lists.debian.net/pipermail/debian-science-maintainers/attachments/20240829/6fa0e165/attachment.sig>