[infinispan-issues] [JBoss JIRA] (ISPN-2039) Iteration in DistributedTaskLifecycleService using ServiceLoader fails

[Vladimir Blagojevic (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-2039?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Blagojevic updated ISPN-2039:
--------------------------------------

    Git Pull Request: https://github.com/infinispan/infinispan/pull/1113  (was: https://github.com/infinispan/infinispan/pull/1113)
         Component/s: Distributed Execution and Map/Reduce
                          (was: Distributed Cache)

    
> Iteration in DistributedTaskLifecycleService using ServiceLoader fails
> ----------------------------------------------------------------------
>
>                 Key: ISPN-2039
>                 URL: https://issues.jboss.org/browse/ISPN-2039
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Distributed Execution and Map/Reduce
>    Affects Versions: 5.1.4.FINAL
>         Environment: This problem has been observed in AS 7 environment rather than Infinispan standalone
>            Reporter: Ales Justin
>            Assignee: Vladimir Blagojevic
>            Priority: Minor
>             Fix For: 5.2.0.ALPHA1, 5.2.0.Final
>
>
> For some unknown reason iteration over available DistributedTaskLifecycle services in DistributedTaskLifecycleService fails, and it fails only in AS environment:
> Caused by: java.util.NoSuchElementException
> 	at java.util.AbstractList$Itr.next(AbstractList.java:350) [classes.jar:1.6.0_31]
> 	at java.util.Collections$1.nextElement(Collections.java:3389) [classes.jar:1.6.0_31]
> 	at java.util.ServiceLoader$LazyIterator.hasNext(ServiceLoader.java:332) [classes.jar:1.6.0_31]
> 	at java.util.ServiceLoader$1.hasNext(ServiceLoader.java:415) [classes.jar:1.6.0_31]
> 	at org.infinispan.distexec.spi.DistributedTaskLifecycleService.onPreExecute(DistributedTaskLifecycleService.java:50) [infinispan-core-5.2.0-SNAPSHOT.jar:5.2.0-SNAPSHOT]
>    public <T> void onPreExecute(Callable<T> task) {
>       try {
>          Iterator<DistributedTaskLifecycle> i = loader.iterator();
>          while (i.hasNext()) { // <------------------------------------------------- we CHECK before
>             DistributedTaskLifecycle cl = i.next();
>             cl.onPreExecute(task);

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