SSR preload/warmup?

[jpage-godaddy]

We've got a bit of an unusual problem. We are deploying a next.js to a Kubernetes cluster which seemingly has a very poorly performing file system. The issue we experience is that the Kubernetes liveness probe which calls a health check in our custom server is timing out. It appears that the root issue is that the SSR for the first request for a particular page in the newly-spawned app is doing an event-loop-blocking 16 seconds task which interferes with this probe request completing in a timely manner, and the pod gets marked as unresponsive and is killed.

In profiling what's going on, it appears a large require dependency tree crawling is what's to blame, and since that's a synchronous process it's blocking other requests. The module being loaded is part of a page component's dependencies. Because the FS is so slow and the dependency tree so large, that's causing problems.

Is there a way to force a preloading of all server-side bundles given a next instance that we can invoke prior to having our pods going live? We may be able to work around by having a "warmup" process that invokes our pages by making a bunch of HTTP requests to stimulate the first SSR beforehand, but if there's a more direct way we can do this we could integrate that technique into our company's app shell.

Would us manually requiring every JS bundle under .next/server accomplish the task of preloading?

[saez0pub]

Hello,

I've also seen this problem.
I've applied a temporary solution to configure the startupProbe to a page which needs this warmup.
But It's not something I feel like a good solution because I would prefer something at build time, more predictable.