Nicolás Rossi created LOG4J2-2630:
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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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