ManagedScheduledExecutorService keeps executing tasks after an exception is thrown ----------------------------------------------------------------------------------- Key: WFLY-13043 URL: https://issues.redhat.com/browse/WFLY-13043 Project: WildFly Issue Type: Bug Components: Concurrency Utilities Affects Versions: 18.0.1.Final, 22.0.1.Final Reporter: Vinicius Kopcheski Assignee: Eduardo Martins Priority: Major There is apparently a bug in the implementation of the ManagedScheduledExecutorService, more specifically when using the inherited method of the ScheduledExecutorService, [scheduleWithFixedDelay|https://docs.oracle.com/javase/7/docs/api/java/uti...]. On its javadoc it is stated "If any execution of the task encounters an exception, subsequent executions are suppressed.". When [this code|https://github.com/kopcheski/managed-scheduled-executor/blob/master/...] is executed in any Wildfly from 10 to 18, the task is kept alive in the scheduler after an exception is thrown and subsequent calls will happen anyway, contradicting the javadoc. To add evidences of a misbehavior, I did two extra checks: 1. Running the exact same code in another JavaEE server (Payara); 2. Using plain JavaSE with the ScheduledExecutorService. In both cases, after an exception being thrown, subsequent executions of it are - as the javadoc states - suppressed.