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https://issues.apache.org/jira/browse/MAPREDUCE-6761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Peter Vary updated MAPREDUCE-6761:
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Attachment: MAPREDUCE-6761.5.patch
Thanks [~jlowe] for the comment.
I decided not to check the selected protocolprovider class explicitly, since
the goal of the test is to validate the exception handling, and not to validate
the protocolprovider selection logic itself. To validate the selected provider
class itself (when we have multiple possible providers) would be a different
testcase altogether.
With that in mind, I changed the type check to a null check, so it would be
easier to read the code, and it expresses better the decision I have made above.
Thanks,
Peter
> 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-6761.3.patch,
> MAPREDUCE-6761.4.patch, MAPREDUCE-6761.5.patch, MAPREDUCE-6761.patch
>
>
> When a rogue 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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