TCP connection times out due to packet loss

Solution Verified - Updated -


  • We have a tested, repeatable problem where our database client/server connection fails with a connection timed out / connection reset that most likely is caused by a tcp keepalive timeout.
  • After upgrading from kernel 3.10.0-514.el7 our application reports connectivity loss for 30 or more seconds


  • Red Hat Enterprise Linux (RHEL) 7.5 and later
  • Physical, as well as virtual (eg. also applies to VMware vSphere, Microsoft Azure Cloud)
  • 10 Gbps network interface, drivers such as ixgbe, mlx5_core, and others
  • Virtual 10 Gbps network interfaces, drivers such as vmxnet3, hv_netsvc, and others
  • TCP network connection

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