[infinispan-issues] [JBoss JIRA] Updated: (ISPN-1086) IndexOutOfBoundsException for DistributedExecutorService with a single node cache

[Ming Fai Ma (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-1086?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ming Fai Ma updated ISPN-1086:
------------------------------

    Steps to Reproduce: 
{code}DefaultCacheManager caches = new DefaultCacheManager(GlobalConfiguration.getClusteredDefault());
caches.defineConfiguration("distexec", new FluentConfiguration(new Configuration()).mode(Configuration.CacheMode.DIST_ASYNC).build());
Cache cache = caches.get("disexec");
DistributedExecutorService executor = new DefaultExecutorService(cache);
executor.execute(new Runnable(){ @Override public void run(){/**anything*/ }  });
{code}
not exactly the code i use but should be identical

  was:
DefaultCacheManager caches = new DefaultCacheManager(GlobalConfiguration.getClusteredDefault());
caches.defineConfiguration("distexec", new FluentConfiguration(new Configuration()).mode(Configuration.CacheMode.DIST_ASYNC).build());
Cache cache = caches.get("disexec");
DistributedExecutorService executor = new DefaultExecutorService(cache);
executor.execute(new Runnable(){ @Override public void run(){/**anything*/ }  });

not exactly the code i use but should be identical



> IndexOutOfBoundsException for DistributedExecutorService with a single node cache
> ---------------------------------------------------------------------------------
>
>                 Key: ISPN-1086
>                 URL: https://issues.jboss.org/browse/ISPN-1086
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Distributed Cache
>    Affects Versions: 5.0.0.CR1
>            Reporter: Ming Fai Ma
>            Assignee: Manik Surtani
>            Priority: Minor
>
> I'm just trying the distributed executor in 5.0.0.CR1. My first test is to start a cache with one member only (but with clustered cache configuration as it is required). When I submitted a runnable in to a DistributedExecutorService with a single node, it got an error:
> {code}
>   java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
>      	at java.util.ArrayList.RangeCheck(ArrayList.java:547)
>      	at java.util.ArrayList.get(ArrayList.java:322)
>      	at org.infinispan.distexec.DefaultExecutorService.randomClusterMemberOtherThanSelf(DefaultExecutorService.java:451)
>      	at org.infinispan.distexec.DefaultExecutorService.execute(DefaultExecutorService.java:278)
> {code}
> there is only one member and no "cluster member other than self". Should the single node use case be supported? I suppose there is no harm to allow user to use the executor in a single node, for example, for unit testing. 
> if this use case is not supported, I suggest to throw an exception with better explanation

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