cpp-tests job is flaky: python pulsar_test.py fails with Segmentation fault

[lhotari]

The cpp-tests job is flaky.

./run-unit-tests.sh: line 99:  2746 Segmentation fault      (core dumped) python pulsar_test.py

Example failure:
https://github.com/apache/pulsar/runs/5566228154?check_suite_focus=true#step:11:1313

Logs: https://github.com/apache/pulsar/suites/5678205919/artifacts/186533781
https://transfer.sh/DUTouQ/test-logs.zip

[lhotari]

@BewareMyPower Do you have a chance to take a look at the cpp-tests failures? There's currently a lot of flakiness.

[lhotari]

the above segfault isn't the only issue, there's also flaky tests, recent example: https://github.com/apache/pulsar/runs/5567332966?check_suite_focus=true#step:11:568

FAILED TESTS (4/284):
    1405 ms: ./main ClientTest.testConnectTimeout (try apache/pulsar#1)
    1323 ms: ./main ClientTest.testConnectTimeout (try apache/pulsar#2)
    2666 ms: ./main ProducerTest.testSendAsyncCloseAsyncConcurrentlyWithLazyProducers (try apache/pulsar#1)
     225 ms: ./main ReaderTest.testReferenceLeak (try apache/pulsar#14148

[BewareMyPower]

Issues of other cpp flaky tests:

• Flaky-test: C++ ProducerTest.testSendAsyncCloseAsyncConcurrentlyWithLazyProducers #13849
• Flaky-test: C++ ClientTest.testConnectTimeout #14665
• Flaky-test: C++ ReaderTest.testReferenceLeak #14719

I'm going to work on these cpp tests first.

[lhotari]

I'm going to work on these cpp tests first.

Thank you @BewareMyPower

[BewareMyPower]

This issue will be closed once #14823 is merged. But I'm not very sure the flaky Python tests are all related with the issue. You can reopen this issue if Python tests are still flaky.