[Openstack] ["Potential Spoofed"] Issue with receiving response with large payload from a node js application running on openstack

ashish.jain14 at wipro.com ashish.jain14 at wipro.com
Tue May 12 08:35:05 UTC 2015


I just figured out that if the payload size is greater than 623 , I do not get any response back. The size of the header is 227 bytes. So the total response size sent all the way to my browser is 850 bytes. Anything above this is not received  by browser.

________________________________________
From: ashish.jain14 at wipro.com <ashish.jain14 at wipro.com>
Sent: Tuesday, May 12, 2015 11:29 AM
To: openstack at lists.openstack.org
Subject: ["Potential Spoofed"] [Openstack] Issue with receiving response with large payload from a node js application running on openstack

Hello,


I have got a nodejs application which is deployed on openstack provisioned resources. Somehow whenever my response has a large payload I am unable to receive the response to my web browser however I am able to print the response at the nodejs server end which is running in openstack. I am using LBAAS from neutron and use the IP of LBAAS to hit nodejs.


Scenario1: I send a request for an id which exist in DB. DB returns json data which is delivered to nodejs. However unable to send it to browser running on my host. I get a 504 error


Scenario2: I send a request for an id which DOES NOT exist in DB. This time I get back the json response all the way till browser.


To summarize all the communications are working fine, only difference between the 2 scenarios is payload size. I have been playing around with MTU on network as well as the compute node for br-tun and eth1 but till now have not succeeded . I am also trying out few things with tcpdump but nothing substantial I have found till now.


Need some help on how to debug this out.


Regards
Ashish

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