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https://issues.apache.org/jira/browse/LOG4J2-1838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15900655#comment-15900655
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ASF subversion and git services commented on LOG4J2-1838:
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Commit f14eadfb7b49211c282434e5a81ba5b850f7a5bb in logging-log4j2's branch
refs/heads/master from [~jvz]
[ https://git-wip-us.apache.org/repos/asf?p=logging-log4j2.git;h=f14eadf ]
[LOG4J2-1838]: Add documentation about throwable suffix() option
Also added notes about related missing documentation.
> 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
> Assignee: Matt Sicker
> 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{suffix(- %mdc{key})}}} will
> append a string generated by pattern {{- }} and {{%mdc{key}}}.
> But patterns that handles throwable will be automatically ignored, because
> they will make the rendered result confusing. So pattern {{%xEx{suffix(-
> %rEx%mdc{key})}}} has the same effect with
> {{%xEx{suffix(- %mdc{key})}}}, 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{suffix(-
> %mdc{key})}" 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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