I obtain an error configuring an errorHandler using a property file.
If use a xml file, everything is right.

I noticed tha the problem is in the "org.apache.log4j.config.PropertySetter" in
"convertArg" method.
The "if" sequence don't foreseen to manage the errorHandler parameter

protected Object convertArg(String val, Class type)
{
	if (val == null)
		return null;

	String v = val.trim();
	if (String.class.isAssignableFrom(type))
	{
		return val;
	} else if (Integer.TYPE.isAssignableFrom(type))
	{
		return new Integer(v);
	} else if (Long.TYPE.isAssignableFrom(type))
	{
		return new Long(v);
	} else if (Boolean.TYPE.isAssignableFrom(type))
	{
		if ("true".equalsIgnoreCase(v))
		{
			return Boolean.TRUE;
		} else if ("false".equalsIgnoreCase(v))
		{
			return Boolean.FALSE;
		}
	} else if (Priority.class.isAssignableFrom(type))
	{
		return OptionConverter.toLevel(v, (Level) Level.DEBUG);
	}
	/**************************************************************************/
	/* BUG FIX                                                                */
	else if(ErrorHandler.class.isAssignableFrom(type)) 
	{ 
		// I copied this line from "org.apache.log4j.xml.DOMCOnfigurator" 
		// (method: "parseErrorHandler")
		return OptionConverter.instantiateByClassName(val,
			org.apache.log4j.spi.ErrorHandler.class,null); 
	}
	/**************************************************************************/
	return null;
}

But at the moment it is not possible set rootLogger, any other loggers or backup
appender.
Is these future enhancement? Can post the code?

Luca Falcon

My environment:

the log4j version is:
---------------------------------------------------------------------------------------------------
1.2.13

this is my log4j.properties:
---------------------------------------------------------------------------------------------------
log_dir=D:/temp/log
log4j.debug=true

log4j.rootLogger                                 = INFO, systemOut

log4j.appender.systemOut                          = org.apache.log4j.FileAppender
log4j.appender.systemOut.errorHandler             =
org.apache.log4j.varia.FallbackErrorHandler
log4j.appender.systemOut.Threshold                = INFO
log4j.appender.systemOut.File                     = ${log_dir}/system.log
log4j.appender.systemOut.layout                   = org.apache.log4j.PatternLayout
log4j.appender.systemOut.layout.ConversionPattern = %d{HH:mm:ss,SSS} %-5p [%t] -
%m%n
---------------------------------------------------------------------------------------------------

this is the output:
---------------------------------------------------------------------------------------------------
log4j:WARN Failed to set property [errorHandler] to value
"org.apache.log4j.varia.FallbackErrorHandler". 
log4j: Parsing for [root] with value=[INFO, systemOut].
log4j: Level token is [INFO].
log4j: Category root set to INFO
log4j: Parsing appender named "systemOut".
log4j: Parsing layout options for "systemOut".
log4j: Setting property [conversionPattern] to [%d{HH:mm:ss,SSS} %-5p [%t] - %m%n].
log4j: End of parsing for "systemOut".
log4j: Setting property [file] to [D:/temp/log/system.log].
log4j: Setting property [threshold] to [INFO].
log4j: setFile called: D:/temp/log/system.log, true
log4j: setFile ended
log4j: Parsed "systemOut" options.
log4j: Finished configuring.
---------------------------------------------------------------------------------------------------

this is my test class:
---------------------------------------------------------------------------------------------------
import org.apache.log4j.Logger;

public class Test
{	
	public static void main(String[] args) throws Exception
	{	
		Logger logger = Logger.getRootLogger();
		logger.error("test message");
	}
}
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