[infinispan-issues] [JBoss JIRA] (ISPN-2835) Issues w/ M/R test cases if cache are not explicitly started on all nodes

[Anna Manukyan (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-2835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12755302#comment-12755302 ] 

Anna Manukyan commented on ISPN-2835:
-------------------------------------

Hi Ray,

I've run your tests and look deeper into that, and found out that you are calling createCluster(builder, 4) method. This method only initializes the EmbeddedCacheManagers and doesn't start default caches as well as doesn't wait till the cluster is formed.

If you'll modify the call to createCluster(builder, 4) to createClusteredCaches(4, builder) , then the tests will work as expected by returning the value 100 for all M/R tasks.

Regards,
Anna.
                
> Issues w/ M/R test cases if cache are not explicitly started on all nodes
> -------------------------------------------------------------------------
>
>                 Key: ISPN-2835
>                 URL: https://issues.jboss.org/browse/ISPN-2835
>             Project: Infinispan
>          Issue Type: Feature Request
>          Components: Core API, Distributed Execution and Map/Reduce
>            Reporter: Ray Tsang
>            Assignee: Galder Zamarreño
>             Fix For: 5.2.2.Final, 5.3.0.Alpha1, 5.3.0.Final
>
>         Attachments: mr-test-src.zip
>
>
> I ran into some issues while using M/R.  The gist of the issue I was seeing is that:
> Start a cluster of Embedded Caches, like 4 nodes
> Put in 100 elements
> Run a simple M/R job to count the number of keys
> If I run the M/R job using  the node I'm inserting elements into as coordinator - the result is 100
> But if I run the M/R job using a different node as coordinator, the result is less than 100
> More interestingly, I can pause for 5 seconds and run the M/R jobs again, the results are always less than 100
> This behavior doens't occur if I explicitly run cacheManager.getCache() for each of the nodes...

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