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  1. WildFly
  2. WFLY-17807

Invalid @Schedule expression results in infinite loop

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      Boot the server with a single EJB:

       

      import javax.ejb.Schedule;
import javax.ejb.Stateless;

@Stateless
public class ScheduleBug {
    @Schedule(persistent = false, hour = "*", minute = "*", second = "*/0")
    public void schedule() {
        System.out.println("tick");    
    }
}

       

      If the schedule is changed to

       

       

      @Schedule(persistent = false, hour = "*", minute = "*", second = "*/1")

      everything works as expected. Negative increments ("*/-1") trigger the error as well.

       

       

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      Boot the server with a single EJB:   import javax.ejb.Schedule; import javax.ejb.Stateless; @Stateless public class ScheduleBug { @Schedule(persistent = false , hour = "*" , minute = "*" , second = "*/0" ) public void schedule() { System .out.println( "tick" ); } }   If the schedule is changed to     @Schedule(persistent = false , hour = "*" , minute = "*" , second = "*/1" ) everything works as expected. Negative increments ("*/-1") trigger the error as well.    
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    Description

      If a @Schedule expression of type Increment uses an increment of zero or less the server enters an infinite loop.

      The error is that in org.jboss.as.ejb3.timerservice.schedule.attribute.IntegerBasedExpression#processIncrement() the interval is not checked for validity.

      Verified on WildFly 23.0.2.Final and 26.1.3.Final. On WildFly 27.0.1.Final the imports have to be changed to jakarta.*.

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          Bug - A problem that impairs or prevents the functions of the product. JBEAP-24839 (7.4.z) WFLY-17807 - Invalid @Schedule expression results in infinite loop

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
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              cfang@redhat.com Cheng Fang
              s4p.com Thomas Reinhardt (Inactive)
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                Updated:
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