What do the warning messages "Discarding invalid packet reply port" signify? (4255470)

The followingwarning messagesare observed in event log though Shareplex is running fine:

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09/22/09 18:25 Notice: Discarding invalid packet reply port = 45146 [sp_cop(rmp)/10167]
09/22/09 18:41 Notice: Discarding invalid packet reply port = 26978 [sp_cop(rmp)/10167]
09/22/09 18:43 Notice: Discarding invalid packet reply port = 57699 [sp_cop(rmp)/10167]
09/22/09 18:45 Notice: Discarding invalid packet reply port = 54031 [sp_cop(rmp)/10167]
09/22/09 18:46 Notice: Restarting import by request [sp_cop/10167]
09/22/09 18:46 Process exited sp_mport (from server_name queue queue_name) [pid = 11495] - exit(0)
09/22/09 18:47 Notice: Discarding invalid packet reply port = 24473 [sp_cop(rmp)/10167

Some network issue, especially a network scan interfering with Shareplex Export or Import process.

This is a network issue. One scenario may be that a network scan was scanning the UDP ports, and Export or Import crashed while trying to respond to the test packet. Almost always, there is no data loss and once the situation corrects (after the network scan is over), the Shareplex processes will run normally. There is a very slight chance that Import may go into recovery and one would see the following messages queue write recovery started without the corresponding messages queue write recovery complete. See SOL6301 for dealing with incomplete recovery.

The solution covers a specific scenario. There can be other reasons for these warning messages to show up.