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https://issues.apache.org/jira/browse/LOG4J2-1308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15182336#comment-15182336
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Ralph Goers commented on LOG4J2-1308:
-------------------------------------

I did this on purpose. To do what you are suggesting you would have to change 

{code}
status = error
name = PropertiesConfigTest

property.filename = target/rolling/rollingtest.log

filters = threshold

filter.threshold.type = ThresholdFilter
filter.threshold.level = debug

appenders = console, rolling, list

appender.console.type = Console
appender.console.name = STDOUT
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = %m%n

appender.rolling.type = RollingFile
appender.rolling.name = RollingFile
appender.rolling.fileName = ${filename}
appender.rolling.filePattern = 
target/rolling2/test1-%d{MM-dd-yy-HH-mm-ss}-%i.log.gz
appender.rolling.layout.type = PatternLayout
appender.rolling.layout.pattern = %d %p %C{1.} [%t] %m%n
appender.rolling.policies.type = Policies
appender.rolling.policies.time.type = TimeBasedTriggeringPolicy
appender.rolling.policies.time.interval = 2
appender.rolling.policies.time.modulate = true
appender.rolling.policies.size.type = SizeBasedTriggeringPolicy
appender.rolling.policies.size.size=100MB

appender.list.type = List
appender.list.name = List
appender.list.filters = threshold
appender.list.filter.threshold.type = ThresholdFilter
appender.list.filter.threshold.level = error

loggers = rolling

logger.rolling.name = org.apache.logging.log4j.core.appender.rolling
logger.rolling.level = debug
logger.rolling.additivity = false
logger.rolling.appenderRefs = rolling
logger.rolling.appenderRef.rolling.ref = RollingFile

rootLogger.level = info
rootLogger.appenderRefs = stdout
rootLogger.appenderRef.stdout.ref = STDOUT
{code}

to

{code}
status = error
name = PropertiesConfigTest

property.filename = target/rolling/rollingtest.log

filter.type = ThresholdFilter
filter.level = debug

#Note that if multiple filters are specified then you must do the following 
where the names mean nothing:
#filters.threshold.type = ThresholdFilter
#filters.threshold.level = debug
#filters.marker.type = Marker
#filters.marker.marker = FLOW
#filters.marker.onMatch = ACCEPT

appenders.console.type = Console
appenders.console.name = STDOUT
appenders.console.layout.type = PatternLayout
appenders.console.layout.pattern = %m%n

appenders.rolling.type = RollingFile
appenders.rolling.name = RollingFile
appenders.rolling.fileName = ${filename}
appenders.rolling.filePattern = 
target/rolling2/test1-%d{MM-dd-yy-HH-mm-ss}-%i.log.gz
appenders.rolling.layout.type = PatternLayout
appenders.rolling.layout.pattern = %d %p %C{1.} [%t] %m%n
appenders.rolling.policies.type = Policies
appenders.rolling.policies.time.type = TimeBasedTriggeringPolicy
appenders.rolling.policies.time.interval = 2
appenders.rolling.policies.time.modulate = true
appenders.rolling.policies.size.type = SizeBasedTriggeringPolicy
appenders.rolling.policies.size.size=100MB

appenders.list.type = List
appenders.list.name = List
appenders.list.filters = threshold
appenders.list.filter.threshold.type = ThresholdFilter
appenders.list.filter.threshold.level = error

loggers.rolling.name = org.apache.logging.log4j.core.appender.rolling
loggers.rolling.level = debug
loggers.rolling.additivity = false
loggers.rolling.appenderRefs = rolling
loggers.rolling.appenderRef.rolling.ref = RollingFile

rootLogger.level = info
rootLogger.appenderRefs = stdout
rootLogger.appenderRef.stdout.ref = STDOUT
{code}

Note that because to have multiple filters you actually wrap them in a 
composite filter you have to change the syntax with the way you are proposing. 
In addition, existing properties configurations would have to be completely 
modified.

> Remove need to pre-specify appender names et al. in property file config 
> format
> -------------------------------------------------------------------------------
>
>                 Key: LOG4J2-1308
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-1308
>             Project: Log4j 2
>          Issue Type: Improvement
>          Components: Configurators
>    Affects Versions: 2.4, 2.5
>            Reporter: Matt Sicker
>            Assignee: Matt Sicker
>
> In the .properties config file format, several plugin types currently require 
> you to declare names ahead of time. For instance:
> {code}
> appenders = foo, bar, baz
> appender.foo.type = Console
> appender.bar.type = File
> appender.baz.type = List
> # ...
> {code}
> would be transformed into
> {code}
> appender.foo.type = Console
> appender.bar.type = File
> appender.baz.type = List
> # ...
> {code}
> These names should be inferable by their first usage. Then the appenders, 
> filters, loggers, etc., properties can all be safely ignored for backwards 
> compatibility with 2.4/2.5.



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