HAPROXY routers are getting slow response and applications are getting 503 error

Solution Verified - Updated -

Issue

  • Many applications are impacted as they are getting 503 error from haproxy routes. All those applications are up and running.
  • tcpdrop and tcpretrans show dropped and re-transmitted packets that cannot be seen in a traffic capture on the outgoing interface, although strace shows them as written to the socket file descriptor.

Environment

  • Red Hat Openshift Container Platform
  • Twistlock 3rd party security application (or any other security application that uses nf_queues)

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