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

[Ming Fai Ma (JIRA)]

IndexOutOfBoundsException for DistributedExecutorService with a single node cache
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                 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:
{quoted}
  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)
{quoted}

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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