lhotari commented on issue #13663:
URL: https://github.com/apache/pulsar/issues/13663#issuecomment-1031180848


   > @lhotari Hi,I have tested the master branch for tens of thousands of 
times, and the not reproduce. I guess the above error is because PR is not 
rebase master, and this SHA maybe not included.
   
   The PR run included the previous fix. I check this failure:  
   [example failure 
2022-01-31T08:43:50.8742741Z](https://github.com/apache/pulsar/runs/5002911603?check_suite_focus=true?check_suite_focus=true#step:8:6996)
  
   
   From the logs, you can see the revision for the build, it's 
[`a4cca4544615e1aeb62884066f1c6e3c79f6973d`](https://github.com/apache/pulsar/runs/5002911603?check_suite_focus=true?check_suite_focus=true#step:2:479)
   
   You can check that it's included:
   ```
   git fetch origin a4cca4544615e1aeb62884066f1c6e3c79f6973d
   git checkout a4cca4544615e1aeb62884066f1c6e3c79f6973d
   git log --grep="LockManagerTest.updateValue"
   ```
   
   @shibd A lot of the problem in CI don't reproduce locally unless you 
simulate the CI environment by restricting the CPU & Memory resources. The 
GitHub Actions CI has 2 virtual CPUs and 7GB of RAM. I have been using a 
solution where I run tests in docker with `--cpus=0.8`. That usually reproduces 
issues which only happen with limited CPU resources. I have some shell 
functions in https://github.com/lhotari/pulsar-contributor-toolbox . The 
solution is for Linux docker environments.
   
   Using the solution in pulsar-contributor-toolbox (this works only on Linux):
   ```
   ptbx_build_coremodules
   ptbx_until_test_fails_in_docker_with_logs --cpus=0.8 -pl pulsar-metadata 
-Dtest=LockManagerTest#updateValue
   ```
   I tried a couple of rounds, but wasn't able to reproduce. It's possible that 
it's just very hard to reproduce. 


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