Marcin Boberek Hi,

I've tried UPS 1.1.2 on Openshift:
https://github.com/aerogear/openshift-origin-cartridge-aerogear-push

and this version of our HelloWorld App:
https://github.com/matzew/unified-push-helloworld/tree/AGPUSH_1622_foreground_metrics
Where, I added metrics POST for app running in foreground:
https://github.com/matzew/unified-push-helloworld/commit/22d25a3084ddff5bbad9829f73d6c10d02721f6b

I am unable to reproduce this problme of the 500 when posting the metrics:

• app open, sending push: did receive and directly displayed. metrics did update correct on the UI, and no 500er!
• app in background, sending push, did receive. Clicking on notification in status-bar, app opens, message is displayed. metrics did update correct on the UI, and no 500er!

Would you mind trying the same version of the hello world app against your server?