The inbound receive rate of messages is too high.

This trace occurs when attempting to process inbound messages. A message could not be forwarded to a specific neighbor because the quota set for that neighbor has been exceeded. This occurs when an unresponsive neighbor fails to clear a backlog of messages pending for that neighbor.

Reduce the rate at which messages are sent within the mesh.

Using Tracing to Troubleshoot Your Application
Administration and Diagnostics