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https://issues.apache.org/jira/browse/LOG4J2-510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14201888#comment-14201888
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Emmanuel BRUN commented on LOG4J2-510:
--------------------------------------
Hi
in fact, I really need a solution, because I discover the problem while my App
was in full production , and it will be too complicated to go back to the
previous
version.
So i have developped a quick and dirty patch, maybe it could help someone else
You have to call this function *stopLogger* each time a session is closed. The
underlying log file will be close at this time.
{code:title=LogUtils.java|borderStyle=solid}
static public void stopLogger(Logger l)
{
l.info("It will be me the last line of the log file !!");
String key = ThreadContext.get("sessionID");
org.apache.logging.log4j.core.Logger coreLogger =
(org.apache.logging.log4j.core.Logger) l;
org.apache.logging.log4j.core.LoggerContext context =
(org.apache.logging.log4j.core.LoggerContext)coreLogger.getContext();
RoutingAppender appender = (RoutingAppender)
context.getConfiguration().getAppender("Routing");
try
{
Method method =
appender.getClass().getDeclaredMethod("getControl",String.class,LogEvent.class);
method.setAccessible(true);
AppenderControl appenderControl = (AppenderControl)
method.invoke(appender,key,null);
appenderControl.getAppender().stop();
}
catch (NoSuchMethodException | SecurityException |
IllegalAccessException | IllegalArgumentException | InvocationTargetException e)
{
// Shouldn't happen - log anyway
l.error("Unable to close the logger",e);
}
}
{code}
Tell me if you see something wrong
Note that the config file should be like this :
{code:title=log4j2.xml|borderStyle=solid}
<Routing name="Routing">
<Routes pattern="$${ctx:sessionID}">
<Route>
<RollingFile
name="Rolling-${ctx:sessionID}"
fileName="./logs/${ctx:sessionID}.log"
filePattern="">
<PatternLayout>
<pattern>%d: %6p : [%t]
: [%c{1}] : %m%n</pattern>
</PatternLayout>
<SizeBasedTriggeringPolicy />
</RollingFile>
</Route>
</Routes>
</Routing>
{code}
Note that if you perform a log after you close the logger, an error will be
generated but it will not stop your application
> How to close inactive log files
> -------------------------------
>
> Key: LOG4J2-510
> URL: https://issues.apache.org/jira/browse/LOG4J2-510
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.0-beta9, 2.1
> Environment: linux
> Reporter: Eric
> Assignee: Ralph Goers
> Labels: performance
>
> Hi There,
> in log4j2 when the App start logging it create and open a file to log into
> and that file stay open as long as the App is running.
> in my case log4j2 create and open too many files base on ThreadContext and
> the OS (linux) will complaint that too many files are open and my App will
> crash and stop responding.
> My question is:
> 1 - how do you close those files with log4j2 if they are inactive for a
> period of time.
> 2 - How do you have access to the log4j2 handle that open those files.
> 3 - How do you tell log4j2 to open a file just for a period of time.
> Thanks
> Eric
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