[jboss-jira] [JBoss JIRA] (WFLY-12329) ManagedScheduledExecutorService should be only available after server is ready

[nimo stephan (Jira)]

    [ https://issues.jboss.org/browse/WFLY-12329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13768447#comment-13768447 ] 

nimo stephan commented on WFLY-12329:
-------------------------------------

[~emmartins] to reproduce the issue at startup, put only the following class into a common war and start the server while watching the wildfly log at startup and you will see the stacktrace above: 


{code:java}
@Startup
@Singleton
public class TaskScheduler {

    @Resource
    ManagedScheduledExecutorService executorService;
   
    // This will start the executorService automatically
    @PostConstruct
    public void init() {
        executorService.scheduleAtFixedRate(this::task, 0, 5, TimeUnit.SECONDS);
    }

    public void task() {
        System.out.println("long running task:" + LocalTime.now());
    }
}
{code}



> ManagedScheduledExecutorService should be only available after server is ready
> ------------------------------------------------------------------------------
>
>                 Key: WFLY-12329
>                 URL: https://issues.jboss.org/browse/WFLY-12329
>             Project: WildFly
>          Issue Type: Bug
>          Components: Concurrency Utilities
>    Affects Versions: 17.0.1.Final
>            Reporter: nimo stephan
>            Assignee: Eduardo Martins
>            Priority: Major
>
> I use a *ManagedScheduledExecutorService* to execute tasks periodically:
> {code:java}
> @Startup
> @Singleton
> public class TaskScheduler {
>     @Resource
>     ManagedScheduledExecutorService executorService;
>     @PostConstruct
>     public void init() {
>         executorService.scheduleAtFixedRate(this::task, 0, 5, TimeUnit.SECONDS);
>     }
>     public void task() {
>         System.out.println("long running task:" + LocalTime.now());
>     }
> }
> {code}
> Wildfly throws a few exceptions as long as server is not fully initiated and in "suspend"-mode:
> {code:java}
> 12:44:12,715 ERROR [org.jboss.as.ee] (EE-ManagedScheduledExecutorService-default-Thread-3) WFLYEE0110: Failed to run scheduled task: java.lang.IllegalStateException: WFLYEE0111: Cannot run scheduled task my.Task$$Lambda$1041/0x000000080240a040 at 5ee966ec as container is suspended
> 	at org.jboss.as.ee at 17.0.1.Final//org.jboss.as.ee.concurrent.ControlPointUtils$ControlledScheduledRunnable.run(ControlPointUtils.java:164)
> 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
> 	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
> 	at org.glassfish.javax.enterprise.concurrent//org.glassfish.enterprise.concurrent.internal.ManagedScheduledThreadPoolExecutor$ManagedScheduledFutureTask.access$201(ManagedScheduledThreadPoolExecutor.java:383)
> 	at org.glassfish.javax.enterprise.concurrent//org.glassfish.enterprise.concurrent.internal.ManagedScheduledThreadPoolExecutor$ManagedScheduledFutureTask.run(ManagedScheduledThreadPoolExecutor.java:534)
> 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> 	at java.base/java.lang.Thread.run(Thread.java:835)
> 	at org.glassfish.javax.enterprise.concurrent//org.glassfish.enterprise.concurrent.ManagedThreadFactoryImpl$ManagedThread.run(ManagedThreadFactoryImpl.java:250)
> {code}
> I use _ManagedScheduledExecutorService_ instead of _ScheduledExecutorService_ in JEE because, *ManagedScheduledExecutorService* should be managed by JEE. Hence, the server should also manage and guarantee not to fire the executorService until the server is ready (and EJBs are available).



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