test: Stream logs from lerna when running tests #548
Conversation
Gives a better picture of what's going on and which tests are failing
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The patch actually succeeded after a re-run, but seems like evergreen is not able to update the status |
I think that's just because there's still one win32 task running. :) (But feel free to merge it already if you like.) |
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Oh, you're right, I think I might've looked at a different run when I wrote that! Hmm, something seems off about this one task being stuck with this change introduced, I'll wait a little before merging to make sure I'm not breaking the ci again 😅 |
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Ah, good to know, thanks! Well, merging then 👍 |
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Is it possible that this is causing the test timeouts on Windows (there are a few in https://evergreen.mongodb.com/waterfall/mongosh)? |
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I'm not sure why this would be the cause, but yeah, tests in this branch timed-out a few times and it seems this wasn't just a flaky test after all. I'll revert the patch |
When lerna runs all the tests in parallel, sometimes the log output between different packages is overlapping, producing a very hard to dechipher log ("Is this line is still from package A or is it package B run output that got in the middle?"). Enabling stream option seems to produce a more readable result where every line is prepended by the package name that runs the script. This helped me a lot to debug the "stuck process" issue in #533 and I thought that it would be nice to have this enabled by default for our test scripts that are run by lerna.
For an example of overlapping logs here's a part of the log of this PR ci run:
There are 5 packages logs overlapped together