This issue involves some ejb timer schedule with increment value 0 as in attributes like hours, minutes, and seconds. For example,

@Schedule(hour="10/0", minute="15/0", second="30/0") 

In the above example, hour, minute and second attribute all contain increment value 0, which literally means, this "recurring" timer should fire every day starting 10 o'clock, every 0 hours thereafter; 15th minute and every 0 minutes thereafter; and 30th seconds and every 0 seconds thereafter.

Practically, the increment 0 should just be ignored, making it a single-expiration on that particular attribute, rather than a never-ending recurring one. WildFly currently treats 0 increment as invalid and any deployment using it would cause DeploymentException.

See https://github.com/jakartaee/enterprise-beans/issues/148