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系统找不到指定的路径 解决 （log4j配置问题）
配置OpenUddi时遇到下面的报错：


log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: \tmp\uddi-access.log (系统找不到指定的路径。)
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:272)
at org.apache.log4j.RollingFileAppender.setFile(RollingFileAppender.java:156)
at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:151)
at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:247)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:123)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:87)
at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:645)
at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:603)
at org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigurator.java:524)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:408)
at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:340)
at com.novell.uddi3.LogInitializer.contextInitialized(LogInitializer.java:67)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3934)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4429)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:850)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:724)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:493)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1206)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:314)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)


从报错信息上来看是我在运行OpenUddi时，有文件找不到。


其实真正原因是log4j.properties里的一个配置项有问题，我的文件中有这样一项：

log4j.appender.ACCESS_FILE.File=/tmp/uddi-access.log


根据这样的配置项log4j会为你依照这个目录找到uddi-access.log, 如果没有这个文件，也会帮你创建文件，但是如果这个目录不存在，它就报错啦。现在的配置log4j会认为Tomcat所在的根目录下有一个tmp文件夹，但是我的D盘下没有这个folder，所以就报错了。


解决方法:

1.在D盘下创建一个tmp

2.改配置项，比如：

log4j.appender.ACCESS_FILE.File=../webapps/uddi/uddi-access.log