Mongo instrumentation is broken about newrelic-ruby-agent

[benweint]

Hi @rosenfeld - thanks much for reporting this!

It looks like our instrumentation is not compatible with some recent changes in the mongo gem in version 1.10.0. For now, you can disable the mongo instrumentation by setting disable_mongo: true in your newrelic.yml file, or setting NEW_RELIC_DISABLE_MONGO=1 in your application's environment.

I'll dig into exactly what's going on here and let you know as soon as we have an update.

[rosenfeld]

Yes, we've done so already, but I thought you would be interested on knowing about the issue.

[benweint]

Very much so, thanks again, and sorry for the trouble this caused you! We'll let you know once we have a fix.

[rosenfeld]

Not much trouble since we're mostly interested on other metric and we don't actually check the Mongo metrics since we don't store much sensitive data on it nor do we make much processing with those data so not having those metrics is not a big deal for us. We only had to disable it to get it running on staging, but it's good to report as someone else might depend more on this :)

[danlo]

+1 to this issue, the above fixed works fine

[benweint]

FYI, we've put in a stopgap measure in newrelic_rpm-3.8.0 that automatically disables our mongo instrumentation for mongo-1.10.0 and above, since fixing this turned out to be non-trivial. I'll keep this open until we actually release proper instrumentation for that version of the mongo gem.

[benweint]

@rosenfeld @danlo - we've just released version 3.8.1 of the newrelic_rpm gem, which includes support for version 1.10.0 of the mongo driver gem. We've also made some fixes that should prevent new versions of the mongo driver gem from breaking like this in the future.

If you're able to try out 3.8.1 (without disable_mongo), we'd be very interested in getting confirmation that things are working as you expect.

Thanks again for reporting this!

[rosenfeld]

Thanks, but it's Friday and I'm almost leaving. I'll leave as soon as I fix a bug that has just been reported to me... I'll take a look into this on Monday.

[benweint]

Awesome! No rush at all.

[danlo]

Bad juju to deploy friday afternoon :)

Monday for me too.

[rosenfeld]

Ok, I could find some time to deploy the new released newrelic gem with my last fixes and I can confirm that everything is working after re-enabling mongo in newrelic.yml.

[benweint]

Awesome! Thanks for following up.