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From "Ray Chiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6761) Regression when handling providers - invalid configuration ServiceConfiguration causes Cluster initialization failure
Date Fri, 19 Aug 2016 08:45:22 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15427838#comment-15427838
] 

Ray Chiang commented on MAPREDUCE-6761:
---------------------------------------

# In Cluster.java, please change back the import from wildcard to non-wildcard.  This is required
by the [Coding Style Guide|https://github.com/steveloughran/formality/blob/master/styleguide/styleguide.md].
# In the unit test, I think it should be possible to modify the configuration and/or mock
the class instead of creating resources.

> Regression when handling providers - invalid configuration ServiceConfiguration causes
Cluster initialization failure
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6761
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6761
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 3.0.0-alpha2
>            Reporter: Peter Vary
>            Assignee: Peter Vary
>              Labels: supportability
>         Attachments: MAPREDUCE-6761.2.patch, MAPREDUCE-6761.patch
>
>
> When a rouge org.apache.hadoop.mapreduce.protocol.ClientProtocolProvider defines a provider
that is not on classpath, then the initialization is failed with the following exception:
> java.util.ServiceConfigurationError: org.apache.hadoop.mapreduce.protocol.ClientProtocolProvider:
Provider org.apache.hadoop.mapred.YarnClientProtocolProvider not found
> 	at java.util.ServiceLoader.fail(ServiceLoader.java:239)
> 	at java.util.ServiceLoader.access$300(ServiceLoader.java:185)
> 	at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:372)
> 	at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
> 	at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
> 	at org.apache.hadoop.mapreduce.Cluster.initProviderList(Cluster.java:84)
> 	at org.apache.hadoop.mapreduce.Cluster.initialize(Cluster.java:114)
> 	at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:108)
> 	at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:101)
> 	at org.apache.hadoop.mapred.JobClient.init(JobClient.java:477)
> 	at org.apache.hadoop.mapred.JobClient.<init>(JobClient.java:455)
> This regression is caused by MAPREDUCE-6473



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