Major Description
Every now and then we see a failure in the system tests:
BatchFlowBetweenGroupsIT.testSingleConcurrencyAndBatchOutputToBatchInputOutput ยป Timeout testSingleConcurrencyAndBatchOutputToBatchInputOutput() timed out after 5 minutes
Looking at the logs shows that this is happening because data enters Group A, and then before the Output Port has a chance to push the data out of Group A, a second FlowFile enters. As a result, the test fails because the queue between Groups A and B, or the connection inside of Group B, never reach the expected size.
