OpenShift router not receiving traffic after setting DROP_SYN_DURING_RESTART

Solution In Progress - Updated -


  • No web traffic is making it to OpenShift routers after enabling the DROP_SYN_DURING_RESTART environment variable.
  • Clients are hanging after configuring DROP_SYN_DURING_RESTART.
  • Router pod goes into CrashLoop due to failing health checks:
Feb 03 13:34:07 atomic-openshift-node[11129]: I0203 13:34:07.228492   11129 prober.go:111] Readiness probe for "router-19-vdjq2_default(e723c7b0-27e1-11e9-a4d6-0050568b43c8):router" failed (failure): Get http://localhost:1936/healthz: net/http: request canceled (Client.Timeout exceeded while awaiting headers)


  • Red Hat OpenShift Container Platform
    • 3.0 - 3.7

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In