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From Mikael Ståldal (JIRA) <j...@apache.org>
Subject [jira] [Commented] (LOG4J2-649) Close a dynamically created appender
Date Mon, 16 Nov 2015 08:50:11 GMT

    [ https://issues.apache.org/jira/browse/LOG4J2-649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15006354#comment-15006354
] 

Mikael Ståldal commented on LOG4J2-649:
---------------------------------------

Have we thought about what will happen if an appender hang on close?

You can use {{org.apache.logging.log4j.core.appender.HangingAppender}} to test this

See also: https://issues.apache.org/jira/browse/LOG4J2-101

> Close a dynamically created appender
> ------------------------------------
>
>                 Key: LOG4J2-649
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-649
>             Project: Log4j 2
>          Issue Type: Improvement
>          Components: API, Appenders
>    Affects Versions: 2.0-rc1
>         Environment: Windows 7 (64-bit)
>            Reporter: Andrew Rose
>            Assignee: Ralph Goers
>
> I'm using the Routing functionality in Log4j 2 to dynamically create appenders at runtime.
When I know that those appenders are finished with, I'd like to tell Log4j so that it can
tidy up the related resources (flush & close files, free its internal objects related
to those appenders, etc.). Without doing this, Log4j still has open file handles and I'm unable
to manipulate the files that it has written (from an external process which post-processes
and archives the logs).
> Remko Popma tells me (via the stackoverflow answer at http://stackoverflow.com/a/23827382/799399)
that there is no way of doing this at the moment.  I'd like to request that you consider enhancing
Log4j 2 in this way.
> I enclose my configuration below, in case it's relevant (but I think all the details
you need are included in the above description).
> {code}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="WARN">
>   <Appenders>
>     <Console name="Console" target="SYSTEM_OUT">
>       <PatternLayout pattern="%d{HH:mm:ss.SSS} %level{ERROR=!, WARN=?, INFO=-, DEBUG=.,
TRACE=.} %msg%n"/>
>     </Console>
>     <Routing name="MatchLogs">
>       <Routes pattern="$${ctx:matchID}">
>         <Route>
>           <RandomAccessFile name="MatchLog-${ctx:matchID}" fileName="logs/${ctx:matchID}.log">
>             <PatternLayout pattern="%d{ISO8601} %-5level %-30.30logger{1} %msg%n"/>
>           </RandomAccessFile>
>         </Route>
>       </Routes>
>     </Routing>
>     <Async name="AsyncWrapper">
>       <AppenderRef ref="MatchLogs" level="debug"/>
>       <AppenderRef ref="Console" level = "info"/>
>     </Async>
>     <Routing name="MatchStatsLogs">
>       <Routes pattern="$${ctx:matchID}">
>         <Route>
>           <RandomAccessFile name="MatchStatsLog-${ctx:matchID}" fileName="logs/${ctx:matchID}_stats.log">
>             <PatternLayout pattern="%msg"/>
>           </RandomAccessFile>
>         </Route>
>       </Routes>
>     </Routing>
>     <Async name="AsyncStatsWrapper">
>       <AppenderRef ref="MatchStatsLogs" level="debug"/>
>     </Async>
>   </Appenders>
>   <Loggers>
>     <Logger name="stats" level="trace" additivity="false">
>       <AppenderRef ref="AsyncStatsWrapper"/>
>     </Logger>
>     <Root level="debug">
>       <AppenderRef ref="AsyncWrapper"/>
>     </Root>
>   </Loggers>
> </Configuration>
> {code}



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