Been trying to debug a really strange error that appeared when using
coverage --concurrency=eventlet ("Name or service not known: localhost)
Finally tracked it down to running out of file descriptors, and now that i know what to look for, i can see them build-up (using e.g.
lsof). I had already noticed memory growing but had chalked that down to book-keeping, but i guess this might be related
are we accidentally preventing gc?
--concurrency flag stops the issue