Business rules in multithreading environment

DMN Engine
#1

Hey Everyone!

I have a process that starts with business rule activity. That activity has a then block with date types. When I start processes in parallelStream I have an error that tells me about wrong date representation. But when I do the same thing in sequential manner everything is OK.

Question: Do you think is there a bug in DMN engine code that uses something that is not a safe-thread? some kind of usage of SimpleDateFormat as a class member instead of local variable.

#2

Hi @dmitry,

thank you for raising this up!

Please share more information about the issue that help to analyze/reprocess it.

  • the whole error message including the stacktrace from the log
  • the version of Camunda you use

Best regards,
Philipp

#3

Hi @Philipp_Ossler
I’ve created a minimal working example for that issue. please, take a look https://bitbucket.org/capitallabs/dmn-issue/src/master/

There are two tests: MultiThreading, that uses parallelStream and SingleThreading, that uses stream.

SingleThreading is always passed
MultiThreading is always failed

#4

Hi @dmitry,

that’s a good preparation. I recommend to open a new bug issue here: https://app.camunda.com/jira/browse/CAM

#5

thanks! done