Under certain conditions:
- multi-node deployment
- LB in front
- task or report created and executed by two subsequent calls to LB, reaching two different back-end nodes (typically from Console)
an error is raised:
This happens because AutowiringSpringBeanJobFactory is expecting a singleton bean for each task or report to run: such a bean is registered upon task or report create, but remains in memory only for the node on which create has happened.