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Date: Tue, 7 Mar 2017 16:38:38 +0000 (UTC)
From: "ASF GitHub Bot (JIRA)" <jira@apache.org>
To: log4j-dev@logging.apache.org
Message-ID: <JIRA.13048375.1488736184000.2951.1488904718356@Atlassian.JIRA>
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Subject: [jira] [Commented] (LOG4J2-1838) Add support for appending common
 suffix to each line of throwable stack trace
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archived-at: Tue, 07 Mar 2017 16:38:43 -0000


    [ https://issues.apache.org/jira/browse/LOG4J2-1838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15899729#comment-15899729 ] 

ASF GitHub Bot commented on LOG4J2-1838:
----------------------------------------

Github user jvz commented on the issue:

    https://github.com/apache/logging-log4j2/pull/61
  
    That's a pretty good point! I should have time later today to merge this unless someone else swoops in during the day to do it. Thanks for the contribution!


> Add support for appending common suffix to each line of throwable stack trace
> -----------------------------------------------------------------------------
>
>                 Key: LOG4J2-1838
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1838
>             Project: Log4j 2
>          Issue Type: New Feature
>          Components: Pattern Converters
>    Affects Versions: 2.8.1
>            Reporter: Zilong Song
>              Labels: features
>             Fix For: 2.8.2
>
>
> Add support for appending common suffix to each line of throwable stack trace. The suffix can be configured by patterns just like patterns used elsewhere. 
> For example, pattern {{%xEx&#123;suffix(- %mdc&#123;key&#125;)&#125;}} will append a string generated by pattern {{-&#32;}}  and {{%mdc&#123;key&#125;}}.
> But patterns that handles throwable will be automatically ignored, because they will make the rendered result confusing. So pattern {{%xEx&#123;suffix(- %rEx%mdc&#123;key&#125;)&#125;}} has the same effect with {{%xEx&#123;suffix(- %mdc&#123;key&#125;)&#125;}}, as if the nested {{%rEx}} pattern has never appeared.
> Following is an example of the with such suffix: 
> {code:title=stack trace, with pattern "%xEx&#123;suffix(- %mdc&#123;key&#125;)&#125;" and MDC(key)="test mdc suffix"|borderStyle=solid}
> java.lang.IllegalArgumentException: IllegalArgument - test mdc suffix
> 	at org.apache.logging.log4j.core.pattern.ExtendedThrowablePatternConverterTest.testSuffixFromNormalPattern(ExtendedThrowablePatternConverterTest.java:48) [test-classes/:?] - test mdc suffix
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91] - test mdc suffix
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_91] - test mdc suffix
> 	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_91] - test mdc suffix
> 	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:?] - test mdc suffix
> Caused by: java.lang.NullPointerException: null pointer - test mdc suffix
> 	at org.apache.logging.log4j.core.pattern.ExtendedThrowablePatternConverterTest.testSuffixFromNormalPattern(ExtendedThrowablePatternConverterTest.java:47) ~[test-classes/:?] - test mdc suffix
> 	... 27 more - test mdc suffix
> }}
> {code}


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