Duplicate Message exception in sender JMS comm channel

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Hi,

Can any one please tell me what is stored in MSG_ID1 and MSG_ID2 in table XI_AF_SVC_ID_MAP

I could only find the schema of XI_AF_SVC_ID_MAP table in SDN which is as follows,

MSG_ID1 (varchar),

MSG_ID2 (varchar),

PERSIST_UNTIL (timestamp).

We have an interface in where MQ daily sends 2 files to PI but sometimes one msg is getting discarded by sender JMS adapter giving warning -

A duplicate message was received, it was received earlier and processed with XI Message ID - "xyz". It will be ignored and discarded from the JMS queue.

Also I found that setting option Time Period for Duplicate Check for EO(IO) (secs) to 0 does not always work.

We are getting this problem after upgrading PI from 3.0 to 7.1.

So if any one has solution to this problem please help me.

Thanks & Regards,

Shweta