Dynatrace nginx agent hanging nginx for some routes on restart

[tinygrasshopper]

We are facing a situation in which the nginx stops responding to routes specified by https://github.com/cloudfoundry/cloud_controller_ng/blob/e7e6ed316a89bb578ecec0aedc88fb61b8fe362c/bosh/jobs/cloud_controller_ng/templates/nginx.conf.erb#L191, when restarted. This behavior is not seen if the addon is not installed. The requests we notice fail need to have a
multipart/form-data header

This are not responded to by nginx:

$ curl -H"Content-Type: multipart/form-data; boundary=o" -XPUT -d "foo" https://URL/v2/apps/70964c35-045e-4b0e-bed9-c1794ebbff1/bits?async=true

But this one is:

$ curl -H"Content-Type: multipart/form-data; boundary=o" -XPUT -d "foo" https://URL/v2/apps/70964c35-045e-4b0e-bed9-c1794ebbff1/something_else?async=true

And this one is:

$ curl  -XPUT -d "foo" https://URL/v2/apps/70964c35-045e-4b0e-bed9-c1794ebbff1/bits?async=true

[aloismayr]

Thanks @tinygrasshopper

We are tracking an internal ticket on this issue. I'll let you know about updates on this item.

[aloismayr]

We found this issue occurs if an outdated http-upload-module for nginx was used. The module with the latest patch in the 2.2 branch fixes the issue. Please review this issue of the http-upload-module project. cloudfoundry/capi-release#61

As soon as the cloud_controller ships the patched module it should work.
Thanks again @tinygrasshopper for bringing this up.