1、错误描述

log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException:
	at java.io.FileOutputStream.open(Native Method)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:142)
	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:842)
	at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768)
	at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648)

	at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514)
	at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:580)
	at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526)
	at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
	at org.apache.log4j.Logger.getLogger(Logger.java:104)
	at freemarker.log.Log4JLoggerFactory.getLogger(Log4JLoggerFactory.java:65)
	at freemarker.log.Logger.getLogger(Logger.java:284)
	at freemarker.template.utility.SecurityUtilities.<clinit>(SecurityUtilities.java:67)

	at freemarker.ext.beans.BeansWrapper.<clinit>(BeansWrapper.java:147)
	at freemarker.template.ObjectWrapper.<clinit>(ObjectWrapper.java:69)

	at freemarker.core.Configurable.<init>(Configurable.java:139)
	at freemarker.template.Configuration.<init>(Configuration.java:142)
	at freemarker.template.Configuration.<clinit>(Configuration.java:127)
	at org.apache.struts2.views.freemarker.FreemarkerManager.createConfiguration(FreemarkerManager.java:331)
	at org.apache.struts2.views.freemarker.FreemarkerManager.init(FreemarkerManager.java:282)
	at org.apache.struts2.views.freemarker.FreemarkerManager.getConfiguration(FreemarkerManager.java:269)
	at org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler.init(DefaultDispatcherErrorHandler.java:47)
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:488)
	at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilter.init(StrutsPrepareFilter.java:56)
	at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4830)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5510)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649)
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1245)
	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1895)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
log4j:ERROR Either File or DatePattern options are not set for appender [ServiceRollingFile].
log4j:ERROR Could not find value for key log4j.appender.stdout
log4j:ERROR Could not instantiate appender named "stdout".

2、错误原因

3、解决办法