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From Jacob Kjome <h...@visi.com>
Subject RE: log4j stops logging at console
Date Tue, 17 May 2005 22:02:49 GMT
Quoting Mark Womack <womack@adobe.com>:

> Yeah, but you are playing roulette with determining which application
> installs the respository selector and assuming they are all trying to
> install the same one.  It really should be better supported at the container
> level.  Have you gotten the JNDI context selector to work in JBoss?  I tried
> some time ago and had problems, but did not have a chance to follow up in
> detail.
>

Support at the container level would be nice.  My point is that even if JBoss
doesn't feel like supporting it, it is pretty easy to make it happen yourself
without JBoss' support.  If one controls the server to a certain degree, the
whole "roulette" analogy fades away.  Sometimes it is hard to get a project
that big to listen to you in a timely manner.  In any case, the only "support"
we'd need at the container level would be setting a system property.  Assuming
the ContextJNDISelector works under JBoss, it would be very simple for someone
to add the extra -D param to JBoss' startup script.  I don't know why it
wouldn't work?  It works under Tomcat and weblogic.  Should work in JBoss.

Jake

> -Mark
>
> > -----Original Message-----
> > From: Jacob Kjome [mailto:hoju@visi.com]
> > Sent: Monday, May 16, 2005 8:32 PM
> > To: Log4J Users List
> > Subject: RE: log4j stops logging at console
> >
> >
> > The thing that confused me was that it seemed like he was saying that
> > there
> > were two physically separate instances of JBoss being started up.  That
> > is,
> > each in their own JVM.  If that were the case, then this issue would be a
> > bit perplexing.  If it is all, ultimately running under a single JBoss
> > instance, then your explanation makes sense.
> >
> > I wouldn't say that JBoss needs internal rework to get
> > application-separated logging working, though.  If the repository selector
> > hasn't already been set, it can be set once by any application.  If it
> > has,
> > then JBoss already has the concept in mind, and they must provide some
> > sort
> > of hook-in to be able to configure the repository selector.
> >
> > Jake
> >
> > At 09:38 AM 5/16/2005 -0700, you wrote:
> >  >JBoss, by current design, only provides for one logging context (ie
> >  >LoggerRepository).  On top of that, the JBoss log4j.xml also sets up a
> >  >special CONSOLE appender that maps the System.out and System.err
> > streams.
> >  >
> >  >If you do any kind of configuration after JBoss starts up that affects
> > the
> >  >console appender OR affects loggers that have been defined in the JBoss
> >  >log4j.xml file, then it will affect the output to the log files.
> > Especially
> >  >Console, do not mess with Console.  Also, if your log4j code ever calls
> >  >LoggerRepository.shutdown() during a redeploy, then logging will be
> > hosed as
> >  >well.
> >  >
> >  >JBoss really needs to provide a better mechanism to allowing web apps
> > and
> >  >ejb's to do their own logging.
> >  >
> >  >Log4j does provide some "layering" of configuration where you can set up
> >  >your own loggers and appenders as long as they are not references by the
> >  >first/base configuration file.  Or you can just add your logging stuff
> > to
> >  >the JBoss log4j.xml file directly.
> >  >
> >  >You may also find the following link useful, but I don't know if anyone
> > has
> >  >gotten to work correctly in JBoss or not.  Seems to me that to be
> > completely
> >  >efficient, it would need to be supported pretty deep in the JBoss log4j
> >  >initialization.
> >  >
> >  >http://www.qos.ch/logging/sc.jsp
> >  >
> >  >-Mark
> >  >
> >  >
> >  >> -----Original Message-----
> >  >> From: Clandes Tino [mailto:clandestino_bgd@yahoo.co.uk]
> >  >> Sent: Monday, May 16, 2005 6:51 AM
> >  >> To: log4j-user@logging.apache.org
> >  >> Subject: log4j stops logging at console
> >  >>
> >  >> Hello all.
> >  >> I am facing the problem with log4j usage in two
> >  >> separate applications.
> >  >> I am using CONSOLE appenders for both of them.
> >  >> Applications are started separately (in two shell
> >  >> windows). The first app (App1) is assembled as EAR and
> >  >> deployed under JBoss (it uses log4j.jar from
> >  >> JBoss/server/default/lib and initializes log4j through
> >  >> MBean, where appenders and loggers are configured).
> >  >>
> >  >> Here is the method in MBean that configures log4j in
> >  >> App1:
> >  >> -------------------------------------------------------
> >  >> private void initLog4j() throws ConfigurationException
> >  >> {
> >  >>     final Properties props = new Properties();
> >  >>     props.setProperty("log4j.category.com.myapp",
> >  >> "DEBUG, CONSOLE, FILE");
> >  >>
> >  >>
> > props.setProperty("log4j.appender.CONSOLE","org.apache.log4j.ConsoleAppend
> >  >> er");
> >  >>
> > props.setProperty("log4j.appender.CONSOLE.layout","org.apache.log4j.Patter
> >  >> nLayout")
> >  >>
> >  >>
> > props.setProperty("log4j.appender.CONSOLE.layout.ConversionPattern","%d{IS
> >  >> O8601}
> >  >>  %-5p [%c{1}] [%X{user}]  - %m%n");
> >  >>
> >  >>
> > props.setProperty("log4j.appender.FILE","org.apache.log4j.RollingFileAppen
> >  >> der");
> >  >>
> >  >> props.setProperty("log4j.appender.FILE.File",
> >  >> getConfigurationSetting(LOG_FILE));
> >  >>
> >  >> props.setProperty("log4j.appender.FILE.MaxFileSize",
> >  >> getConfigurationSetting(MAX_FILE_SIZE));
> >  >>
> >  >> props.setProperty("log4j.appender.FILE.MaxBackupIndex",
> >  >> getConfigurationSetting(MAX_BACKUP_FILE));
> >  >>
> >  >>
> > props.setProperty("log4j.appender.FILE.layout","org.apache.log4j.PatternLa
> >  >> yout");
> >  >>
> >  >>
> > props.setProperty("log4j.appender.FILE.layout.ConversionPattern","%d{ISO86
> >  >> 01}
> >  >>  %-5p [%c{1}] [%X{user} %X{ip} %X{userAgent}] -
> >  >> %m%n");
> >  >>
> >  >>         PropertyConfigurator.configure(props);
> >  >>      }
> >  >>
> >  >> App1 uses A.jar and B.jar from App2 in compilation and
> >  >> runtime. Both jars are placed in sar archive and
> >  >> deployed in default/deploy folder under Jboss.
> >  >>
> >  >> The other (App2) is RMI Server application deployed
> >  >> separately (it uses another log4j-1.2.8.jar placed in
> >  >> its classpath). A.jar and B.jar are in its classpath.
> >  >> App2 configures log4j by log4j properties file:
> >  >>
> >  >> ------------------------------------------------
> >  >> log4j.category.CONSOLE = , aCONSOLE
> >  >> log4j.appender.aCONSOLE =
> >  >> org.apache.log4j.ConsoleAppender
> >  >> log4j.additivity.CONSOLE=false
> >  >> log4j.appender.aCONSOLE.ImmediateFlush=true
> >  >> log4j.appender.aCONSOLE.layout=org.apache.log4j.PatternLayout
> >  >> --------------------------------------------------
> >  >>
> >  >> Both applications are physically on the same machine.
> >  >> The problem occurs when some class from App1 invokes a
> >  >> class from B.jar. Then logging disappears from console
> >  >>  window of App1. No further message in log appears.
> >  >> However logging into file works OK.
> >  >>
> >  >> My question is:
> >  >> What can cause such behavior?
> >  >>
> >  >> Thanx for the hint in advance.
> >  >> Best regards
> >  >> Milan
> >  >>
> >  >>
> >  >>
> >  >>
> >  >> ___________________________________________________________
> >  >> How much free photo storage do you get? Store your holiday
> >  >> snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com
> >  >>
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> >  >
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>
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