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db-replication-tree doesn't support circular replication
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Description

When it's pointed at a section using circular replication (e.g. x2 currently, or any mw section when we're preparing for DC-switchver), it hangs indefinitely. My guess is that it's infinitely trying to follow the circular replication.

Event Timeline

Kormat triaged this task as Medium priority.May 20 2021, 12:44 PM

@Kormat How do you see the urgency of this (and the probability we'll work on it anytime soon)?

I wouldn't say it's very _urgent_, but it would definitely be nice to have it done before the dc switchover preperations, for sanity-checking that circular replication is set up correctly.

It'll probably take an afternoon to do, so it's not a huge time investment, either.

Change 696454 had a related patch set uploaded (by Kormat; author: Kormat):

[operations/software/wmfmariadbpy@master] db-repliation-tree: Display circular replication reasonably.

https://gerrit.wikimedia.org/r/696454

Change 696454 merged by jenkins-bot:

[operations/software/wmfmariadbpy@master] db-replication-tree: Display circular replication reasonably.

https://gerrit.wikimedia.org/r/696454

Marostegui assigned this task to Kormat.
Marostegui subscribed.

This is done - thanks Stevie