Hi Bruno,
Thank you for your input.
> if (err) { callback(err); }
> callback(null,result);
> Which causes the callback to be called twice.
i searched for similar pattern in my code without finding any
> Increase your log level and make sure that you have proper logging
> and request/response logging.
Yes, i'll ask Winston to be more chatty.
> Ps: that error is not a node.js version issue
agreed
My node.js program is basically a reverse proxy and at the same time a
[private|local] CA that authenticates client-side X.509 certs.
i'm using http-proxy but i don't think i can conveniently blame the
underlying "battle-hardened" http-proxy either.
> Ps: use process.on uncaughtException and the server will not crash
> Be careful with that :)
Instead of
process.on('uncaughtException')
are you thinking of something like "domain"? i need to read up a bit on
it since
* it is still "unstable"
* unsure whether i can use it in node 0.8.22
Thanks again.
On Tue, Dec 10, 2013 at 3:57 AM, Bruno Fuster <[email protected]> wrote:
> Ps: use process.on uncaughtException and the server will not crash
>
> Be careful with that :)
>
> On Dec 9, 2013, at 9:01 PM, ming <[email protected]> wrote:
>
> Hi,
> i'm running a node application which crashes probably once a week due to
> an uncaught "Can't render headers ..." exception. The node.js version in
> use is 0.8.22 and the OS distro is RHEL 6.2. i did not find the definitive
> pattern of sequence of events which led to the crash though.
>
> The stack trace looks like:
>
> http.js:715
> throw new Error('Can\'t render headers after they are sent to the
> client.'
> ^
> Error: Can't render headers after they are sent to the client.
> at ServerResponse.OutgoingMessage._renderHeaders (http.js:715:11)
> at ServerResponse.writeHead (http.js:1059:20)
> at Socket.proxyError
> (/opt/share/node_modules/http-proxy/lib/node-http-proxy/http-proxy.js:193:9)
> at Socket.g (events.js:192:14)
> at Socket.EventEmitter.emit (events.js:126:20)
> at Socket.connect.require.lookup.addressType (net.js:699:16)
> at process.startup.processNextTick.process._tickCallback
> (node.js:245:9)
>
> According to my web surfing, several developers also ran into similar
> problem in the past but it is not clear to me what the culprit is. i know
> the node.js version i used (0.8.22) has some age but it seems that similar
> problems also exist in 0.10.10 so i'm not sure upgrading node.js helps in
> this case. Moreover, to upgrade node.js in our environment is somewhat
> painful and not really under my control.
>
> Any suggestion how i can track down and rectify the problem?
>
> Thanks.
>
>
>
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