We have an integration scenario in PI 7.1 which picks up an xml file from an external mobile working system, and then populates a service order completion function in ECC with the data from the file. This works perfectly well most of the time, however very occasionally we will get a backlog of errors of up to a couple of hours. The error in question is the 'maximum number of connections is 1' message.
Am aware that the number of connections can be increased, however I don't believe this is the root cause of the issue, as whenever the issue occurs there is a record in STAD in ECC which shows a connection from the relevant RFC user hanging for the period of time of the blockage and apparently transmitting vast amounts of data:
There are no errors anywhere for this message, it just takes a huge amount of time to process.
Looking in the PI audit log, the delay occurs at "RFcAdapter received a asynchronous message. Trying to send tRFC for j2EE_GUEST with TID xxxxxx". Again there is no error, it just takes the amount of time in screenshot above to move on to the next step.
I reprocessed the same message later on and it went through without any issue, and I also replicated exactly in test without any problems, so it appears unrelated to the content of the message itself.
Would be grateful for any thoughts on the cause!
Regards
David
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