[jira] [Updated] (LOG4J2-774) NdcPatternConverter breaks Log4j 1.2.x layout

["Frank Wißmann (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LOG4J2-774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Frank Wißmann updated LOG4J2-774:
---------------------------------

    Summary: NdcPatternConverter breaks Log4j 1.2.x layout  (was: NdcPatternConverter brakes Log4j 1.2.x layout)

> NdcPatternConverter breaks Log4j 1.2.x layout
> ---------------------------------------------
>
>                 Key: LOG4J2-774
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-774
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Layouts
>    Affects Versions: 2.0.1
>            Reporter: Frank Wißmann
>            Assignee: Remko Popma
>            Priority: Minor
>              Labels: patch
>             Fix For: 2.0.2
>
>         Attachments: NdcPatternConverter.java.patch
>
>
> In Log4j 1.2.17 NdcPatternConverter.format() returns an empty string "" or the stack messages separated by space "a b c" (NDC.DiagnosticContext.fullMessage).
> The PatternLayout \[%20.20x\] results in 
> {code}[                    ]{code} or {code}[               a b c]{code}.
> In Log4j 2.0.1 NdcPatternConverter.format() returns an unmodified Collection.toString() representation: "\[\]" for an empty collection or the collection separated by comma "\[a, b, c\]" (DefaultThreadContextStack.toString() and MutableThreadContextStack.toString()).
> The PatternLayout \[%20.20x\] results in {code}[                  []]{code} or {code}[           [a, b, c]]{code}.



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