在应用程序引擎内部使用时，Google Cloud Vision API会挂起

Question

I'm trying to run the sample code for google's cloud vision API from the official quick start guide (Java): https://cloud.google.com/vision/docs/quickstart-client-libraries

When running in a standalone program, everything works as expected. If I run the exact same code inside app engine's local dev server, the call to "vision.batchAnnotateImages(requests);" hangs. It doesn't throw any exception and there is no running thread. It never times out (I left it running for ~20 minutes once). Pausing all threads in the debugger only shows threads waiting.

Answer 1

You are supposed to make calls to Cloud Vision API, a service hosted in the Cloud, not locally on your machine. You may check the "Quickstart" page for more insight.