The users of my website are seeing intermittent ERR_SSL_PROTOCOL_ERROR when making cross domain requests to api.flickr.com
By intermittent I mean that I've seen this happen 4 times out of ~1200 requests to the api yesterday.
Failed to load resource: net::ERR_SSL_PROTOCOL_ERROR https://api.flickr.com/services/rest/?method=flickr.photos.getInfo&api_key=.....
My site is and AngularJS application running on Google App Engine and is exclusivley avalable on HTTPS.
sslchecker shows that my site's certificate & certificate chain is installed correctly. Well, I think it looks ok!
sslchecker for api.flickr.com shows that ROOT 1 of the certificate chain is missing. Is that the problem? Is there any way around that for me?
Any other ideas? Is the problem that our certificates are issues by different authorities maybe?
Edit - Some other possibly relevant info gleaned from google analytics
- Have seen it happen for different OSes - Android, iOS, Windows
- Different browsers - Android, Chrome, Safari
- Different Network Domains
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