log4j:ERROR setFile(null,true) call failed.

[Simon]

Hi, I have added a YAWL api to my GWT project, and am getting the
following error below. Am using eclipse gwt plugin with GWT2.0.0 .
Where can I define those paths with GWT's default jetty server?

----------------------------------
log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: /logs/default.log (No such file or
directory)
at java.io.FileOutputStream.openAppend(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:177)
at java.io.FileOutputStream.<init>(FileOutputStream.java:102)
at org.apache.log4j.FileAppender.setFile(FileAppender.java:294)
at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:
165)
at
org.apache.log4j.DailyRollingFileAppender.activateOptions(DailyRollingFileAppender.java:
223)
at
org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:
307)
at
org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:
172)
at
org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:
104)
at
org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:
809)
at
org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:
735)
at
org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:
615)
at
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:
502)
at
org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:
547)
at
org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:
483)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
at org.apache.log4j.Logger.getLogger(Logger.java:104)
at
org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:
229)
at
org.apache.commons.logging.impl.Log4JLogger.<init>(Log4JLogger.java:
65)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:
39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:
27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:
529)
at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:
235)
at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:
209)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
at org.apache.jasper.servlet.JspServlet.<clinit>(JspServlet.java:58)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:
39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:
27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:
253)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
39)
at
org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:
616)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
at
org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:
1220)
at
org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:
513)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:
448)
at com.google.gwt.dev.shell.jetty.JettyLauncher
$WebAppContextWithReload.doStart(JettyLauncher.java:447)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
39)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at
org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:
115)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
39)
at
org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:
130)
at org.mortbay.jetty.Server.doStart(Server.java:222)
at
org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:
39)
at
com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:
536)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:377)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:938)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:690)
at com.google.gwt.dev.DevMode.main(DevMode.java:251)

[zixzigma]

I don't think you can use Log4J with GWT. only java.util.Logging