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https://issues.apache.org/jira/browse/YARN-8856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16642849#comment-16642849
 ] 

Rohith Sharma K S commented on YARN-8856:
-----------------------------------------

I just ran test in trunk and failed. I found that below is the reason for 
initialization failure for sysout log. 
{code}
Caused by: org.apache.hadoop.metrics2.MetricsException: Unsupported metric 
field getEntitiesFailureLatency of type 
org.apache.hadoop.metrics2.lib.MutableQuantiles
    at 
org.apache.hadoop.metrics2.lib.MutableMetricsFactory.newForField(MutableMetricsFactory.java:87)
    at 
org.apache.hadoop.metrics2.lib.MetricsSourceBuilder.add(MetricsSourceBuilder.java:147)
    at 
org.apache.hadoop.metrics2.lib.MetricsSourceBuilder.<init>(MetricsSourceBuilder.java:69)
    at 
org.apache.hadoop.metrics2.lib.MetricsAnnotations.newSourceBuilder(MetricsAnnotations.java:43)
    at 
org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:223)
    at 
org.apache.hadoop.yarn.server.timelineservice.metrics.TimelineReaderMetrics.getInstance(TimelineReaderMetrics.java:61)
    at 
org.apache.hadoop.yarn.server.timelineservice.reader.TimelineReaderWebServices.<clinit>(TimelineReaderWebServices.java:82
{code}

This we will not notice in actual deployment because HADOOP-15657 and YARN-8270 
go together. But for running tests, it looks tests is considering HBase version 
of hadoop-common dependency which doesn't exit HADOOP-15657 fix leading to test 
failure. 

YARN-8270 jenkins hasn't run hbase-tests package which is the reason we 
couldn't caught earlier. cc:/ [~vrushalic] [~Sushil-K-S]

[~Sushil-K-S] We should skip loading metrics while running hbase tests which 
actually starts MiniHbase cluster with Hbase-2.0 jars. 



> TestTimelineReaderWebServicesHBaseStorage tests failing with 
> NoClassDefFoundError
> ---------------------------------------------------------------------------------
>
>                 Key: YARN-8856
>                 URL: https://issues.apache.org/jira/browse/YARN-8856
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jason Lowe
>            Priority: Major
>
> TestTimelineReaderWebServicesHBaseStorage has been failing in nightly builds 
> with NoClassDefFoundError in the tests.  Sample error and stacktrace to 
> follow.



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