CI: Fixed travis-36-cov build

[TomAugspurger]

Closes #30309

Just debugging right now. Can't reproduce locally yet.

[TomAugspurger]

In theory, setting LD_PRELOAD=/opt/conda/lib/libgomp.sov will fix this. Trying to understand the issue a bit more first.

[WillAyd]

Rather than updating that may also just want to get off of the trusty service since may have been patched in glibc

pytorch/pytorch#2575 (comment)

[TomAugspurger]

Mmm good to know.

I think we had issues with databases last time I looked. Will see if I can find that thread.

[TomAugspurger]

The LD_LIBRARY_PRELOAD thing did the trick, but I'd prefer to solve it more cleanly. Trying Will's suggestion next.

[WillAyd]

I think also need to add the appropriate DB services for CI to be green:

https://docs.travis-ci.com/user/database-setup/#mysql

[WillAyd]

Whoops sorry I see you did that one some already, but I guess that's what is causing the CI failure for the ones currently red

[TomAugspurger]

Yep, I have a commit to fix that, just waiting for the running job to see if the openmp thing is fixed.

[TomAugspurger]

OK that one passed. Took 34 minutes though, compared to 27 in https://travis-ci.org/pandas-dev/pandas/builds/626386764 :/

[WillAyd]

Hmm yea something watch, though I think the runs normally fluctuate in that range

[WillAyd]

lgtm if green

[TomAugspurger]

Thanks for the help Will! I'm glad to have avoided the LD_LIBRARY_PRELOAD stuff.

This last run took 32 minutes. I recall some ongoing work to balance these builds a bit, will see if I can track that down.