[jira] [Created] (LOG4J2-2968) Placeholder with default value containing "}"

[Donatien RIVIERE (Jira)]

Donatien RIVIERE created LOG4J2-2968:
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             Summary: Placeholder with default value containing "}"
                 Key: LOG4J2-2968
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2968
             Project: Log4j 2
          Issue Type: Bug
          Components: Lookups
    Affects Versions: 2.13.3, 2.14.0
         Environment: 

            Reporter: Donatien RIVIERE
         Attachments: StrSubstitutorPatternDefaultValueTest.java

StrSubstitutor does not properly handle the variable default values that 
contains "}" because it is interpreted as end of default value.

However, this character is part of the pattern layout format, so it is very 
common to expect defining a variable allowing to set a pattern, and fallback to 
the default value.

Example:

{code:yaml}
  pattern: $\{env:MY_PATTERN:-%date{DEFAULT} %level %m%n}
{code}

This pattern is interpreted as below which is obviously wrong (and not a valid 
pattern format).

{code:java}
%date{DEFAULT %level %m%n}
{code}

It would be nice to be able to protected the default value with quotes or any 
begin/end character.

Please find the JUnit test case in attachment.



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