Issues with some pages with 4.1.1-1 on Xenial

[carlalexander]

I've been using your configuration for a while with WordPress sites and it's been great! I'm slowly moving everything to Xenial and I've started running into issues where pages are half rendered. If I remove Varnish, the backend returns everything correctly.

I've had this issue before. But it's more consistent now. I managed to dig down to inside varnishlog and find this:

-   Fetch_Body     4 eof stream
-   FetchError     Resource temporarily unavailable
-   FetchError     eof socket fail

When this happens, the request is incomplete. Yet Varnish returns it anyways. No retries are attempted.

Is there a way to make a check for these FetchError and trigger a retry? I tried using vcl_backend_error and doing return (retry);, but that didn't work. Is there a way to check for this in vcl_backend_response? I've looked around, but information on this is sparse (or my GoogleFu failed me lol).

[carlalexander]

I'm doing some extensive debugging and I think this is an issue with Varnish itself. So I'm closing this.