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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HADOOP-13806) MetricsSourceBuilder doesn't set hasAtMetric when the Source object is reregistered
Date Sat, 07 Jan 2017 10:45:58 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13806?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Naganarasimha G R resolved HADOOP-13806.
    Resolution: Won't Fix

Not required, its easier for the clients to use a new Object rather than framework supporting
reregistering of the same object with the MetricsSystem

> MetricsSourceBuilder doesn't set hasAtMetric when the Source object is reregistered
> -----------------------------------------------------------------------------------
>                 Key: HADOOP-13806
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13806
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Naganarasimha G R
>            Assignee: Naganarasimha G R
>         Attachments: HADOOP-13806.001.patch
> We are trying to register a Object (instance of MetricsObject) which has already been
registered and unregistered. During this operation we got an exception during MetricsSourceBuilder.build()
> {code}
> org.apache.hadoop.metrics2.MetricsException: No valid @Metric annotation found.
> 	at org.apache.hadoop.metrics2.lib.MetricsSourceBuilder.build(MetricsSourceBuilder.java:83)
> 	at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.register(MetricsSystemImpl.java:225)
> 	at org.apache.hadoop.metrics2.impl.TestMetricsSystemImpl.testUnregisterSource(TestMetricsSystemImpl.java:417)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> {code}

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