[LOG4J2-94] Variable substitution: ${sys:foo} defaults to <property name=":foo">, should default to <property name="foo">

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0-beta1
• Fix Version/s: 2.0-beta3
• Component/s: Core
• Assignee: Ralph Goers
• Reporter: Denis Treskunov
• Created: 10/Oct/12 00:32
• Updated: 13/Oct/12 17:41
• Resolved: 13/Oct/12 17:41

Description

The following configuration doesn't work (${sys:log.level} can't be resolved even though default value is provided).

<?xml version="1.0" encoding="UTF-8"?>
<configuration status="OFF">
<properties>
<property name="log.level">error</property>
<property name=":log.level">ACTUALLY_GETS_USED</property>
</properties>
<appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d

{HH:mm:ss.SSS}

[%t] %-5level %logger

{36}

- %msg%n"/>
</Console>
</appenders>
<loggers>
<root level="${sys:log.level}">
<appender-ref ref="Console"/>
</root>
</loggers>
</configuration>

In org.apache.logging.log4j.core.lookup.Interpolator.lookup(LogEvent, String), on line 110,
var = var.substring(prefixPos) should be var = var.substring(prefixPos + 1) instead.