Why do "unexpectedly shrunk window" messages appear in the system logs

Solution Verified - Updated -

Issue

  • The following messages are seen in the system logs:
Jun  9 13:41:25 <hostname> kernel: TCP: Peer 10.20.30.40:55555/80 unexpectedly shrunk window 498148923:498152793 (repaired)
  • What causes these messages to be logged.
  • Can these messages be safely ignored.

Environment

  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 7

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