matrix-org / matrix-org/sytest

Suspected flakiness in `New federated private chats get full presence information (SYN-115)`

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Z-Flaky
Dominant language
Perl
Stars
81
Forks
63
Avg merge
1h 47m
Merged PRs (30d)
1

Description

https://github.com/matrix-org/synapse/runs/4067253219?check_suite_focus=true had this test fail in 1/6 sytest runs.

I wondered if the changes in #1160 had unintentionally introduced some kind of flakey problem. But the failure in that link does not arise from running sytest on synapse with workers (the usual suspect for for flakiness). That was a surprise.

Raising this so we can track any future sightings.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the linked CI run and the “New federated private chats get full presence information (SYN-115)” sytest, then compare the failing run with the other five runs. Review the changes in #1160 and watch for future sightings; done means the flakiness is reproduced and its cause is identified or the tracking issue is updated with clear evidence.

Written by the indexing model from the issue text.

Assessment

Tech stack
perl
Domain
testing-qa
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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