I have deployed my API in Apigee. The deployment says The revision is deployed and the traffic flows, but the flow may be impaired https://xyz.apigee.net/collectionabc/v1/getreq. Could not understand why the server response is down.
Two things:
Check that there is traffic going through the proxy and that you don't have a conflict with another proxy in the same org.
Try undeploying completely, and then downloading the bundle and reimporting it to a new proxy. Ocaisionally a configuration gets messed up just enough, and just right, that tracking down the RCA isn't practical but redeploying helps.