andri.dk
Reproducing my cloud-run issue#
Introduction#
My service hangs on large transfers and I don't understand why. It works perfectly fine on my Macbook or in a local container.
This project aims to reproduce the problem with as few lines as possible.
About the code#
No rocket science. We set the headers and then manually write "A" to the http.ResponseWriter. By default it fetches 200M. Size can be adjusted with a query-parameter.
https://servicelink/?size=100 will download a 100M file.
If you want to build and run#
You can skip this and just follow the next step from our service. This roughly follows the cloud-run quickstart. Note: I will remove the service in a few days.
gcloud builds submit --tag eu.gcr.io/redia-internal/reproduce-cloud-run-bug
gcloud beta run deploy --image eu.gcr.io/redia-internal/reproduce-cloud-run-bug --platform managed
Reproducing#
Then from your terminal enter the following
# 1 MB data works fine
curl https://reproduce-cloud-run-bug-acyeuzbsfq-ew.a.run.app?size=1 > wtf.dat && ls -alh wtf.dat
-rw-r--r-- 1 andri staff 1.0M Aug 16 11:13 wtf.dat
# 100 MB data fails
curl https://reproduce-cloud-run-bug-acyeuzbsfq-ew.a.run.app?size=100 > wtf.dat && ls -alh wtf.dat
cat wtf.dat
<html><head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<title>500 Server Error</title>
</head>
<body text=#000000 bgcolor=#ffffff>
<h1>Error: Server Error</h1>
<h2>The server encountered an error and could not complete your request.<p>Please try again in 30 seconds.</h2>
<h2></h2>
</body></html>
Things to rule out#
gocloud.dev server package#
Ruled out. Also fails with a standard http.ListenAndServe