Users and Developers, We are hitting a very weird and random issue in contrail. We believe that is due to something wrong on the metadata_proxy.cc code. Our test basically sends 30 concurrent requests to the metadata service and some of the them failed with a 502 “Bad Getway” response from contrail code.
After running tcpdump on both the tap interface of the VM and the vhost0 on the hypervisor where that VM is being hosted, we noticed that the VM sends properly the request but when the request fails is because we got another request coming from the vhost0 interface, it looks like the vRouter is forwarding back the meta-data request to the VM client instead of forwarding it to the meta-data server. We have this case mostly uncer concurrent calls and sometimes even with 10 concurrent calls we will be able to hit it. We were wondering is someone has experience this issue before. Ou contrail version is 2.11-56.el6 on CentOS 6.5 Thanks, Edgar
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