400 (Unknown SID) on Heroku

[aslak hellesoy]

Hi everyone,

My app uses ShareJS v0.7.0-alpha9 with browserchannel 1.0.8. Everything works smoothly when the server runs locally.

On Heroku collaborative editing just barely works. It's sluggish and lossy.

Looking in the browser console I see a lot of this:

GET https://__mydomain__.com/channel/bind?OSID=0uxhj8ua&OAID=1&VER=8&RID=rpc&SID=0mz0dgax&CI=0&AID=1&TYPE=xmlhttp&zx=auzp29u91ps9&t=1 400 (Unknown SID) bcsocket-uncompressed.js:1818

GET https://__mydomain__.com/channel/bind?OSID=0mz0dgax&OAID=1&VER=8&RID=rpc&SID=bgebgka1&CI=0&AID=1&TYPE=xmlhttp&zx=b8ww70hzr50w&t=1 400 (Unknown SID) bcsocket-uncompressed.js:1818

I'm guessing this is Heroku clipping the browserchannel connection because they don't like long lived HTTP connections. Am I right in assuming that?

It also seems to me that browserchannel fails to reconnect, but I'm not sure why. Does anyone know what's causing the 400 (Unknown SID) error?

Any help working around this would be greatly appreciated.

Thanks!

Aslak

[aslak hellesoy]

I found out what the problem is. Browserchannel in a load-balanced setup only works if sessions are sticky (and they are not on Heroku).

It would probably work if browserchannel processes could use used a shared session store such as redis.

I have create a ticket in browserchannel: https://github.com/josephg/node-browserchannel/issues/32

Thoughts?

Aslak

[Joseph Gentle]

I've replied in the issue.

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