We have an issue where we have a functioning mapping, which takes an IDOC and performs a JDBC lookup to determine the receivers - it works in test mode and when we use the mapping as a standard mapping at runtime (both using the same data, lookup channel and database).
However when we try and execute the mapping as a receiver determination it fails with the following error in the trace;
at sun.reflect.GeneratedMethodAccessor2759.invoke(Unknown Source)
This is then shown as an error in ECC - other IDOCs are processing fine and we can see the IDOC hitting PI and trying to execute the Receiver Determination before failing with the above error.
We have tried refreshing the CPA Cache, recreating the JDBC lookup channel and refreshing the mapping cache with a 'non-change' to the mapping - but none of these have made any difference.
We are using SAP PI 7.4 single stack (AEX).
Has anyone else seen this behaviour? Or have any ideas?