I have a node js server running in App Engine using a custom domain. Everything works fine.
When I deploy a new version there is a huge latency spike as the old instances are stopped and new ones started. >From reading the docs, it would appear that I need to: 1. Enable warmup requests by adding to app.yaml inbound_services: - warmup 2. Create a handler for /_ah/warmup 3. Deploy new version without promoting: gcloud deploy --no-promote app.yaml 4. From the App Engine versions page, use Migrate to move traffic from old to new I'm new to App Engine, and the docs are vague so I'm have questions and a major problem: 1. What is the point of the /_ah/warmup handler? Since I initialize everything I need to when the node app starts, there is nothing for this handler to do. 2. Is the handler optional? I assume yes since I read somewhere that a 404 response would be OK. 3. If it's not optional, what response is expected? 4. This is the biggie!: I've tried this (omitting the handler). The Migrate button becomes available and appears to migrate traffic to the new version HOWEVER, after a while my site starts failing. The problem is different after each Migrate - one time was corrupt/invalid HTML, another a JavaScript syntax error, another the entire site was wrapped inside a PRE tag in HTML I didn't write! The only way I've found to "fix" the corruption is to remove inbound_services: -warmup from app.yaml & re-deploy To make it even weirder, the corruption only happens if the site is accessed from the custom domain. If I hit the appspot.com address everything is OK My head hurts. Any help/insight gratefully received -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/5bbacf4d-61b1-4581-9e46-e84a01cd6420%40googlegroups.com.
