[jira] [Created] (LOG4J2-2630) Syslog PatternParser always escapes backslash

["Nicolás Rossi (JIRA)" <ji...@apache.org>]

Nicolás Rossi created LOG4J2-2630:
-------------------------------------

             Summary: Syslog PatternParser always escapes backslash
                 Key: LOG4J2-2630
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2630
             Project: Log4j 2
          Issue Type: Bug
          Components: Appenders, Pattern Converters
    Affects Versions: 2.11.2
         Environment: Java 1.8

Log4J 2.11.2
            Reporter: Nicolás Rossi


The KeyValuePair in the SyslogAppender always escapes the backslash even if you don't use it as escape character. It is forced on the PatternParser.java:177 (last parameter). 

Steps to reproduce:
 # Configure the KeyValuePair to read the ThreadContext variable "eventName":

 
{code:java}
<Syslog name="SyslogAudit" format="RFC5424" host="10.1.2.55" port="1468"
           protocol="TCP" appName="test" includeMDC="false" mdcId="test"                  facility="USER" enterpriseNumber="18060" newLine="true"  
           messageId="Audit">
   <LoggerFields>
       <KeyValuePair key="evt" value="%X{eventName}"/> 
   </LoggerFields>
</Syslog>
{code}
 # Set a ThreadLocal with a String with a backslash (here it is escaped because I'm inside Java) and then send a message:

{code:java}
ThreadContext.put("eventName", "Attribute with backslash: [\\]");
log.debug("Hello world!");{code}
 

The message received is:

06-13-2019 14:52:50 User.Debug 10.1.2.54 1 2019-06-13T14:52:51.298-03:00 MacBook-Pro.local test 62462 Audit [test@18060 evt="{color:#FF0000}Attribute with backslash: [\\]{color}"] Hello World!

 



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