Hi Mario, which version of the UIMA Java SDK are you using?
-- Richard > On 11. Nov 2019, at 09:58, Mario Juric <m...@unsilo.ai> wrote: > > Hi Peter, > > A while ago we started to get some erratic null pointer exceptions from Ruta > because the type of some feature structure element is null (see stack trace > below). The error is not consistently reproducible, in fact it seldomly > occurs and when reprocessing the document it doesn’t happen again. We > therefore think there are some race conditions at play when running in a > multithreaded environment as we do in production, and I was hoping that maybe > you would get an idea what might be causing it just by looking at the stack > trace. > > Cheers > Mario