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Coherence Cluster Communication Problem Detected due to Packet Size Mismatch. (Doc ID 2640136.1)

Last updated on MAY 19, 2023

Applies to:

Oracle Coherence - Version 3.7.1 and later
Oracle WebLogic Server - Version 10.3.6 and later
Information in this document applies to any platform.


What does the following error mean? How to fix it?

(thread=PacketPublisher, member=1): A potential communication problem has been detected. A packet has failed to be delivered (or acknowledged) after 45 seconds, although other packets were acknowledged by the same cluster member (Member(Id=2, Timestamp=[date Time], Address=[IP1]:[port1], MachineId=[MachineID1], Location=site:,machine:[Machine1],process:[PID1], Role=WeblogicServer)) to this member (Member(Id=1, Timestamp=[date Time], Address=[IP2]:[port1], MachineId=[MachineID2], Location=site:,machine:[Machine2],process:[PID2], Role=WeblogicServer)) as recently as 29 seconds ago. It is possible that the packet size greater than 1432 is responsible; for example, some network equipment cannot handle packets larger than 1472 bytes (IPv4) or 1468 bytes (IPv6). Use the 'ping' command with the option to verify successful


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