Nullpointer exception on deleting historic case instance when entityLinks is not enabled.

[jombie]

Describe the bug
Nullpointer exception on deleting historic case instance when entityLinks is not enabled.

Expected behavior
Null check or enableEntityLinks check should be done to avoid nullPointer exception.

Code

cmmnHistoryService
     .createHistoricCaseInstanceQuery()
     .caseInstanceId(caseInstanceId)
     .deleteWithRelatedData();

Additional context
Flowable version: 6.8.0
Flowable with spring boot

[jombie]

Fix for the same: #3746

[filiphr]

Thanks for the fix @jombie. Apart from the fix. We would actually suggest using something like

cmmnHistoryService
     .createHistoricCaseInstanceQuery()
     .caseInstanceId(caseInstanceId)
     .deleteSequentiallyUsingBatch(10, "Test");

Instead of the deelteWithRelatedData.

If you only want to delete a single case instance you can also use cmmHistoryService.deleteHistoricCaseInstance(caseInstanceId). That deletes the right data in the right way as well

[filiphr]

The PR was merged in 39d2fc0, but we forgot to close the issue