We are going to close the issue because the user didn't reply.
We are ready to re-open it in case of reply.

The GE owner reqplied the following:
"
What node version are you using? There is an open issue with node 6.X promises, so we recommend you to use 4.X LTS instead.

Since some errors are asynchronous, and thus raised as an event, you can subscribe also to error events from the pipeline and the recorder. Otherwise, you'd need to check the KMS logs for errors.

"

Comment by amaestrini@create-net.org :

Dear coach,
the applicant sent an update

***********************

I think this might be related to an error with the storage - is there a way
to catch this exception?

***********************

On Wed, Sep 14, 2016 at 11:07 AM, Andrea Maestrini <
amaestrini@create-net.org> wrote:

> Dear FIWARE coach,
> we forward you a support request received from a CreatiFI applicant we are
> not able to solve.
> Please let us know if you need direct contact with the submitter.
> Thanks.
>
> ************************
>
> I'm working on getting Firefox to work (Chrome works fine). Sometimes I
> see this exception only with Firefox. It occurs after the session is closed
> and the recordings are being stopped. The recording fails (zero byte file).
> The node app must be restarted after this. I dont see any errors in the
> kurento server log - is there something I could look for?
>
> thanks
> Paul
>
> Trace: { [Error: Request has timed out]
> room-0 request: '{"jsonrpc":"2.0","method":"invoke","params":

,"id":1981}',
> room-0 retry: [Function: retry] }
> room-0 at RecorderEndpoint.noop (/home/paul_davies/uxprobe/
> kurento-room-app/node_modules/kurento-client/node_modules/
> kurento-client-core/lib/abstracts/UriEndpoint.js:35:22)
> room-0 at callback2 (/home/paul_davies/uxprobe/
> kurento-room-app/node_modules/kurento-client/node_modules/
> promisecallback/index.js:27:25)
> room-0 at tryCatch (/home/paul_davies/uxprobe/
> kurento-room-app/node_modules/kurento-client/node_modules/
> es6-promise/dist/es6-promise.js:410:12)
> room-0 at invokeCallback (/home/paul_davies/uxprobe/
> kurento-room-app/node_modules/kurento-client/node_modules/
> es6-promise/dist/es6-promise.js:425:13)
> room-0 at publish (/home/paul_davies/uxprobe/
> kurento-room-app/node_modules/kurento-client/node_modules/
> es6-promise/dist/es6-promise.js:393:7)
> room-0 at publishRejection (/home/paul_davies/uxprobe/
> kurento-room-app/node_modules/kurento-client/node_modules/
> es6-promise/dist/es6-promise.js:335:3)
> room-0 at flush (/home/paul_davies/uxprobe/kurento-room-app/node_modules/
> kurento-client/node_modules/es6-promise/dist/es6-promise.js:121:5)
> room-0 at nextTickCallbackWith0Args (node.js:420:9)
> room-0 at process._tickDomainCallback (node.js:390:13)
>
> ************************
>

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Dear accelerator,
your issue has been taken by FIWARE expert
BR