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Re: Need help: websocket proxy stops working after a while

April 04, 2014 04:20AM
Hi all,

The WebSocket protocol specification (RFC 6455) defines a _protocol_level_ keep alive fonctionnality (the protocol defines both a 'ping' and a 'pong' frame).

Unfortunately, it seems that nginx doesn't take these frames into account to reset its timeout watchdog timer so far... so that you have to implement some _application_level_ heartbeat mecanism if you don't want your WebSocket connection be broken by an intermediate nginx on low activity periods...

This is ennoying: such application work has a quite heavy resource cost, especially on the server side. This looses some of the most valuable benefits of a WebSocket connection: maintaining an active asynchronous notification channel from the server to the client, just in case...

Hope this helps,
Philippe.
SubjectAuthorPosted

Need help: websocket proxy stops working after a while

Alder NetworkJune 03, 2013 06:26PM

Re: Need help: websocket proxy stops working after a while

Maxim DouninJune 04, 2013 06:46AM

Re: Need help: websocket proxy stops working after a while

Alder NetworkJune 07, 2013 05:56PM

Re: Need help: websocket proxy stops working after a while

phil3361April 04, 2014 04:20AM

Re: Need help: websocket proxy stops working after a while

Maxim DouninApril 04, 2014 06:38AM



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