I have configure the log4j.properties and set the environment variable
CURN_JAVA_VM_ARGS properly according to the user manual

// Located on file://d:/curn-3.2.6/docs/users-guide/log4j.properties
log4j.rootLogger=info, File,CONSOLE

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.SimpleLayout

log4j.appender.File=org.apache.log4j.FileAppender
log4j.appender.File.layout=org.apache.log4j.PatternLayout

log4j.appender.File.file=log.out

# Overwrite the file each time
log4j.appender.File.append=false

# Print the date in ISO 8601 format
log4j.appender.File.layout.ConversionPattern=%d %-5p (%c{1}): %m%n

log4j.logger.org.clapper.curn=info

set
CURN_JAVA_VM_ARGS=-Dlog4j.configuration="file://d:/curn-3.2.6/docs/users-gu ide/log4j.properties"

When I started  the curn using curn --logging yahoo.cfg, Log4j hadn't been
 used . Instead, java.util.Logging was used .

Any suggestion ?

On 09/23/2010 12:49 PM, Liu Yongjian wrote:

Yes. Curn uses Apache Commons Logging. Thus, you must also tell Commons
Logging what logging framework to use; otherwise, it defaults to
java.util.Logging. The Users' Guide is not specific enough here; I will update
it. In any case, you also need this option, to use Log4J:

-Dorg.apache.commons.logging.log=org.apache.commons.logging.impl.Log4JLogge r
--
-Brian

Brian Clapper, http://www.clapper.org/bmc/
A man shall never be enriched by envy.
        -- Thomas Draxe

I am sorry to say that the reason curn ignore log4j is that I forgot adding
the log4j dependency to %CURN_HOME%/lib

But after I did that and followed your instruction, an exception occurred:

log4j:ERROR Could not read configuration file from URL
[file://D:/curn-3.2.6/doc
s/users-guide/log4j.properties].
java.net.UnknownHostException: D
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.SocksSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at sun.net.NetworkClient.doConnect(Unknown Source)
        at sun.net.NetworkClient.openServer(Unknown Source)
        at sun.net.ftp.FtpClient.openServer(Unknown Source)
        at sun.net.ftp.FtpClient.openServer(Unknown Source)
        at sun.net.www.protocol.ftp.FtpURLConnection.connect(Unknown Source)
        at sun.net.www.protocol.ftp.FtpURLConnection.getInputStream(Unknown
Sour
ce)
        at java.net.URL.openStream(Unknown Source)
        at
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurato
r.java:459)
        at
org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionCon
verter.java:471)
        at org.apache.log4j.LogManager.<clinit>(LogManager.java:125)
        at org.apache.log4j.Logger.getLogger(Logger.java:105)
        at
org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.jav
a:283)
        at
org.apache.commons.logging.impl.Log4JLogger.<init>(Log4JLogger.java:1
08)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown
Source)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
Sou
rce)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at
org.apache.commons.logging.impl.LogFactoryImpl.createLogFromClass(Log
FactoryImpl.java:1040)
        at
org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementat
ion(LogFactoryImpl.java:782)
        at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactory
Impl.java:601)
        at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactory
Impl.java:333)
        at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:664)
        at org.clapper.util.logging.Logger.enableLogger(Logger.java:606)
        at org.clapper.util.logging.Logger.enableLogging(Logger.java:294)
        at
org.clapper.util.cmdline.CommandLineUtility$1.parseOption(CommandLine
Utility.java:984)
        at
org.clapper.util.cmdline.ParameterParser.parse(ParameterParser.java:3
29)
        at
org.clapper.util.cmdline.CommandLineUtility.parseParams(CommandLineUt
ility.java:1001)
        at
org.clapper.util.cmdline.CommandLineUtility.execute(CommandLineUtilit
y.java:222)
        at org.clapper.curn.Tool.main(Tool.java:170)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.clapper.curn.Bootstrap.loadAndRun(Bootstrap.java:340)
        at org.clapper.curn.Bootstrap.main(Bootstrap.java:203)
log4j:ERROR Ignoring configuration file
[file://D:/curn-3.2.6/docs/users-guide/l
og4j.properties].
log4j:WARN No appenders could be found for logger (
org.clapper.util.classutil.Cl
assFinder).
log4j:WARN Please initialize the log4j system properly.

On 09/23/2010 02:21 PM, Liu Yongjian wrote:

Your file-based URL is unparsable by the JDK. Try

    file:/D:/curn-3.2.6/docs/users-guide/log4j.properties

i.e., one slash before the "D:", not two.
--
-Brian

Brian Clapper, http://www.clapper.org/bmc/
If you think the United States has stood still, who built the largest
shopping center in the world?
        -- Richard M. Nixon

It's working , Thanks Brian

Now I found another problems on Ubuntu:

org.clapper.util.cmdline.CommandLineException: User-specified log class
'org.apache.commons.logging.impl.Log4JLogger' cannot be found or is not
useable.
        at
org.clapper.util.cmdline.CommandLineUtility.execute(CommandLineUtility.java :239)
        at org.clapper.curn.Tool.main(Tool.java:160)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:5 7)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp l.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.clapper.curn.Bootstrap.loadAndRun(Bootstrap.java:330)
        at org.clapper.curn.Bootstrap.main(Bootstrap.java:193)
Caused by: org.apache.commons.logging.LogConfigurationException:
User-specified log class 'org.apache.commons.logging.impl.Log4JLogger'
cannot be found or is not useable.
        at
org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(Lo gFactoryImpl.java:798)
        at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.j ava:601)
        at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.j ava:333)
        at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:664)
        at org.clapper.util.logging.Logger.enableLogger(Logger.java:606)
        at org.clapper.util.logging.Logger.enableLogging(Logger.java:294)
        at
org.clapper.util.cmdline.CommandLineUtility$1.parseOption(CommandLineUtilit y.java:984)
        at
org.clapper.util.cmdline.ParameterParser.parse(ParameterParser.java:329)
        at
org.clapper.util.cmdline.CommandLineUtility.parseParams(CommandLineUtility. java:1001)
        at
org.clapper.util.cmdline.CommandLineUtility.execute(CommandLineUtility.java :222)
        ... 7 more

On 09/23/2010 03:02 PM, Liu Yongjian wrote:

;-)

--
-Brian

Brian Clapper, http://www.clapper.org/bmc/
Main's Law: For every action there is an equal and opposite government program.

On 09/23/2010 03:06 PM, Liu Yongjian wrote:

This is likely to be a classpath issue. Is the Log4J jar file in one of the
lib directories, as described here?

http://www.clapper.org/software/java/curn/download/3.2.7/users-guide/...

--
-Brian

Brian Clapper, http://www.clapper.org/bmc/
How does a project get to be a year late? ... One day at a time.
        -- Frederick Brooks, Jr., The Mythical Man Month

.....
What is the matter ?

OMG, I forgot adding the log4j dependency again. Dam !!

Thanks again, Brian.

It's working properly now .

On 09/23/2010 03:14 PM, Liu Yongjian wrote:

Excellent.
--
-Brian

Brian Clapper, http://www.clapper.org/bmc/
A child's education should begin at least 100 years before he is born.
        -- Oliver Wendell Holmes