[zeromq-dev] Issue using zmq req-res with nodejs

[Prasad Ghawate]

Hello,



I am trying to get help on this past 2 days . We are using default request
response Patten for communication between different modules  on the server
after first deployment on GCP cloud, while load test we encounter issue
where for multiple requests at a time to a modules stops receiving request
at some point of time .



Following are things we checked for this.

1.       Sample zmq req- response application as mentioned in below email
(was able to reproduced the issue, responding module hangs and does not
accept further requests.)

2.       Tired adding monitoring for socket event in sample ( didn’t
help). https://www.npmjs.com/package/zmq

3.       Found no issues with memory and CPU usages .

4.       Tried Setting up ZMQ_HWM = 0, ZMQ_SWAP etc. for the sample program
didn’t helped. http://api.zeromq.org/2-1:zmq-setsockopt

5.       Currently looking at http://zguide.zeromq.org/php:chapter4 for
reliable request response Patten .



Am I checking in right direction ? please suggest.



Regards,

Prasad.



*From:* Prasad Ghawate [mailto:prasad.ghawate at anzu.org]
*Sent:* Thursday, May 12, 2016 11:43 AM
*To:* 'zeromq-dev at lists.zeromq.org' <zeromq-dev at lists.zeromq.org>
*Subject:* Issue using zmq req-res with nodejs



Hello,



I am using zmq (request- response) with node js everything works well on my
development Ubuntu machine. But when i deploy code on Cloud GCP server
(Ubuntu). For multiple requests with pause of 100 ms the responder stops
receiving  requests. PFA  Please help. I am using npm zmq v 2.15.1 on both
dev and cloud server machine. I am using request response example from
http://blog.rastating.com/using-zeromq-with-node-js/ For testing with 100
Ms interval instead of 1000 ms .

Requester :

[image: cid:image001.jpg at 01D1AD05.7F96DC50]

Responder :

[image: cid:image002.png at 01D1AD05.7F96DC50]

Regards,

Prasad
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