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From cbowditch <bowditch_ch...@hotmail.com>
Subject Re: 0-byte log file created when using IBM JDK
Date Mon, 07 Sep 2009 16:29:54 GMT

Since writing this mail I have realised that my application uses log4j via
Apache Commons Logging. So that the problem is likely a class loading issue
as described here: http://www.qos.ch/logging/classloader.jsp. I have tried
putting log4j and commons-logging jars both into lib\endorsed directory of
the IBM JDK and that results in a NPE when trying to initialize the commons
logging LogFactory. I guess I still have much to understand about how
commons logging interacts with log4j in an IBM JDK. I would appreciate if
anyone can help point me in the right direction. 

I also forgot to say that I'm using log4j v1.2.8 and commons logging v1.0.4.

Thanks,

Chris


cbowditch wrote:
> 
> Hi All,
> 
> I have an application that uses log4j debugging and the log files are
> created perfectly when using Sun JDK 5. However, my customer has IBM JDK 5
> and when I enable log4J debugging the log file is created but is 0 bytes.
> The exact same log4J configuration file is used on Sun and IBM JDKs
> 
> My Java application uses PropertyConfigurator.configure to configure
> log4J, but log4J finds a log4j.properties file somewhere in the classpath.
> I spotted this by turning on log4J debugging using -Dlog4j.debug=true.
> However, specifying the path using -Dlog4J.configuration doesn't help and
> log4J is still initialized twice due to the call to
> PropertyConfigurator.configure. The output from log4 debug is shown below.
> I suspect that IBM JDK intercepts log4J messages as you can configure
> logging from within Websphere. Although my application runs standalone and
> is not a web application. Does anyone know why the messages don't make it
> to the log file?
> 
> log4j: Using URL
> [file:/C:/Thunderhead40/servers/thserverWAS/config/JLBProtocolD
> ebug.cfg] for automatic log4j configuration.
> log4j: Reading configuration from URL
> file:/C:/Thunderhead40/servers/thserverWAS
> /config/JLBProtocolDebug.cfg
> log4j: Parsing for [root] with value=[warn,file].
> log4j: Level token is [warn].
> log4j: Category root set to WARN
> log4j: Parsing appender named "file".
> log4j: Parsing layout options for "file".
> log4j: Setting property [conversionPattern] to [%r [%p] %C{1}.%M(): -
> %m%n].
> log4j: End of parsing for "file".
> log4j: Setting property [file] to
> [c:\thunderhead40\servers\thserverWAS\bin\JLBP
> rotocolDebug.log].
> log4j: Setting property [maxBackupIndex] to [1].
> log4j: Setting property [threshold] to [DEBUG].
> log4j: Setting property [maxFileSize] to [1000KB].
> log4j: setFile called:
> c:\thunderhead40\servers\thserverWAS\bin\JLBProtocolDebug
> .log, true
> log4j: setFile ended
> log4j: Parsed "file" options.
> log4j: Parsing for [org.jgroups] with value=[DEBUG].
> log4j: Level token is [DEBUG].
> log4j: Category org.jgroups set to DEBUG
> log4j: Handling log4j.additivity.org.jgroups=[null]
> log4j: Finished configuring.
> log4j: Parsing for [root] with value=[warn,file].
> log4j: Level token is [warn].
> log4j: Category root set to WARN
> log4j: Parsing appender named "file".
> log4j: Parsing layout options for "file".
> log4j: Setting property [conversionPattern] to [%r [%p] %C{1}.%M(): -
> %m%n].
> log4j: End of parsing for "file".
> log4j: Setting property [file] to
> [c:\thunderhead40\servers\thserverWAS\bin\JLBP
> rotocolDebug.log].
> log4j: Setting property [maxBackupIndex] to [1].
> log4j: Setting property [threshold] to [DEBUG].
> log4j: Setting property [maxFileSize] to [1000KB].
> log4j: setFile called:
> c:\thunderhead40\servers\thserverWAS\bin\JLBProtocolDebug
> .log, true
> log4j: setFile ended
> log4j: Parsed "file" options.
> log4j: Parsing for [org.jgroups] with value=[DEBUG].
> log4j: Level token is [DEBUG].
> log4j: Category org.jgroups set to DEBUG
> log4j: Handling log4j.additivity.org.jgroups=[null]
> log4j: Finished configuring.
> 

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