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https://issues.apache.org/jira/browse/LOG4J2-381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13756259#comment-13756259
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Ralph Goers commented on LOG4J2-381:
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This is true because the RollingFileManager is trying to avoid having multiple
streams open for the same file (see the Javadoc for java.io.FileOutputStream)
so it only uses the file name as the manager's key. The existing
RollingFileManager can't be updated as it is designed to be immutable.
Note that this same situation will occur if you configure two
RollingFileAppenders int the same configuration that point to the same file or
if two web applications are running in Tomcat and share a configuration. You
will end up with a single RollingFileManager that is shared by all appender
instances.
At the moment, the only way to reconfigure the manager would be to remove the
appender (or change its file name), reconfigure, and then add it back with the
new definition.
> Changes in SizeBasedTriggeringPolicy has no effects when automatic
> reconfiguration is on.
> -----------------------------------------------------------------------------------------
>
> Key: LOG4J2-381
> URL: https://issues.apache.org/jira/browse/LOG4J2-381
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.0-beta8, 2.0-beta9
> Reporter: Alexander Khokhlov
>
> My config is very simple:
> <?xml version="1.0" encoding="UTF-8"?>
> <configuration xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
> strict="true" monitorInterval="5">
> <appenders>
> <appender type="console" name="CONSOLE">
> <layout type="PatternLayout" pattern="%5p %10c %C{1}(%L) - %m%n"/>
> </appender>
> <appender name="BOOT" type="rollingfile" fileName="boot.log"
> filePattern="boot-%i.log" append="true">
> <layout type="PatternLayout" pattern="%5p %10c %C{1}(%L) - %m %ex%n"/>
> <SizeBasedTriggeringPolicy size="1 kb" />
> <DefaultRolloverStrategy />
> </appender>
> </appenders>
> <loggers>
> <root level="all">
> <appender-ref ref="CONSOLE"/>
> <appender-ref ref="BOOT"/>
> </root>
> </loggers>
> </configuration>
> This is because when you create a RollingFileAppender again it uses the
> previously created RollingFileManager obtained from MAP (AbstractManager
> (69)). But in my case, the name is already exists, so appropriate manager
> already been created. But "data" parameter are not the same when manager was
> created at first time. It contains new value of policy.
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