We know that the table act_ru_deadletter_job is a safety measure when a job in act_ru_job exceeded the number of retries.
But there is no table act_ru_deadletter_history_job which should match to the act_ru_history_job. Won’t the data be lost when the history job exceeded the number of retries?
ehhhh, I have found the solution in the 6.6.0 release.