Hello Jörg,
Below is my PI structure. Excluded ERROR_DESC but still facing the same error.
fyi.. this was working fine till a couple of days back. Also this issue is only when picking up the data from prod db instance. When replicated recent (2 days) data to QA instance, there the same jdbc adapter was picking up the data successfully.
In worse case, connected PI QA jdbc channel to prod db table and encountered the same error.
Br,
Saiganesh.