I tested my system how it behaves when a database is temporarily unavailable. My JBoss EAP data sources are configured to auto-reconnect. As I expected processes that were running at the time of database breakdown ended with errors. After a few seconds when the database was back available I could run new processes with success but I noticed that job executor stopped to sync with the database. I have property org.kie.executor.interval set to 10 to sync job executor between nodes. After a short research, I found out that LoadAndScheduleRequestsTask doesn’t handle exceptions so when an exception is thrown ScheduledThreadPoolExecutor by design stops executing periodic tasks.