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https://issues.apache.org/jira/browse/HADOOP-13986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15832229#comment-15832229
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Andres Perez edited comment on HADOOP-13986 at 1/20/17 6:44 PM:
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Could I work on this? Will it be easier to add the abstract signature to the 
{{MutableMetric}}?


was (Author: aaperezl):
Could I work on this? And should we include those that extend 
{{AbstractMetric}} as well as those that extend {{MutableMetric}}?

> UGI.UgiMetrics.renewalFailureTotal is not printable
> ---------------------------------------------------
>
>                 Key: HADOOP-13986
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13986
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.8.0, 3.0.0-alpha2
>            Reporter: Wei-Chiu Chuang
>            Priority: Minor
>
> The metrics (renewalFailures and renewalFailuresTotal) in the  following code 
> snippet are not printable.
> {code:title=UserGroupInformation.java}
> metrics.renewalFailuresTotal.incr();
> final long tgtEndTime = tgt.getEndTime().getTime();
> LOG.warn("Exception encountered while running the renewal "
>         + "command for {}. (TGT end time:{}, renewalFailures: {},"
>         + "renewalFailuresTotal: {})", getUserName(), tgtEndTime,
>     metrics.renewalFailures, metrics.renewalFailuresTotal, ie);
> {code}
> The output of the code is like the following:
> {quote}
> 2017-01-12 12:23:14,062 WARN  security.UserGroupInformation 
> (UserGroupInformation.java:run(1012)) - Exception encountered while running 
> the renewal command for f...@example.com. (TGT end time:1484252600000, 
> renewalFailures: 
> org.apache.hadoop.metrics2.lib.MutableGaugeInt@323aa7f9,renewalFailuresTotal: 
> org.apache.hadoop.metrics2.lib.MutableGaugeLong@c8af058)
> ExitCodeException exitCode=1: kinit: krb5_cc_get_principal: No credentials 
> cache file found
> {quote}



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