tomcat启动时报了一个错，大侠们帮忙指点一下啊!!!

[我4个瘦额]

部署完工程，启动tomcat，报了一个No output folder错误，什么意思啊？

2012-9-25 21:27:48 org.apache.catalina.core.AprLifecycleListener init
信息: Loaded APR based Apache Tomcat Native library 1.1.22.
2012-9-25 21:27:48 org.apache.catalina.core.AprLifecycleListener init
信息: APR capabilities: IPv6 [false], sendfile [true], accept filters [false], random [true].
2012-9-25 21:27:49 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["http-apr-8080"]
2012-9-25 21:27:49 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["ajp-apr-8009"]
2012-9-25 21:27:49 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 1958 ms
2012-9-25 21:27:50 org.apache.catalina.core.StandardService startInternal
信息: Starting service Catalina
2012-9-25 21:27:50 org.apache.catalina.core.StandardEngine startInternal
信息: Starting Servlet Engine: Apache Tomcat/7.0.23
2012-9-25 21:27:50 org.apache.catalina.startup.HostConfig start
严重: Unable to create directory for deployment: C:\Program Files\apache-tomcat-7.0.23\conf\Catalina\localhost
2012-9-25 21:27:50 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory C:\Program Files\apache-tomcat-7.0.23\webapps\docs
2012-9-25 21:27:50 org.apache.catalina.core.StandardContext postWorkDirectory
警告: Failed to create work directory [C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\docs] for context [/docs]
2012-9-25 21:27:50 org.apache.jasper.EmbeddedServletOptions <init>
严重: The scratchDir you specified: C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\docs is unusable.
2012-9-25 21:27:50 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory C:\Program Files\apache-tomcat-7.0.23\webapps\examples
2012-9-25 21:27:50 org.apache.catalina.core.StandardContext postWorkDirectory
警告: Failed to create work directory [C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\examples] for context [/examples]
2012-9-25 21:27:50 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2012-9-25 21:27:50 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2012-9-25 21:27:50 org.apache.jasper.EmbeddedServletOptions <init>
严重: The scratchDir you specified: C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\examples is unusable.
2012-9-25 21:27:50 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLocationsCache', 'org.apache.jasper.compiler.TldLocationsCache@396fce')
2012-9-25 21:27:50 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory C:\Program Files\apache-tomcat-7.0.23\webapps\host-manager
2012-9-25 21:27:50 org.apache.catalina.core.StandardContext postWorkDirectory
警告: Failed to create work directory [C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\host-manager] for context [/host-manager]
2012-9-25 21:27:51 org.apache.jasper.EmbeddedServletOptions <init>
严重: The scratchDir you specified: C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\host-manager is unusable.
2012-9-25 21:27:51 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory C:\Program Files\apache-tomcat-7.0.23\webapps\manager
2012-9-25 21:27:51 org.apache.catalina.core.StandardContext postWorkDirectory
警告: Failed to create work directory [C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\manager] for context [/manager]
2012-9-25 21:27:51 org.apache.jasper.EmbeddedServletOptions <init>
严重: The scratchDir you specified: C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\manager is unusable.
2012-9-25 21:27:51 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory C:\Program Files\apache-tomcat-7.0.23\webapps\ROOT
2012-9-25 21:27:51 org.apache.catalina.core.StandardContext postWorkDirectory
警告: Failed to create work directory [C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\_] for context []
2012-9-25 21:27:51 org.apache.jasper.EmbeddedServletOptions <init>
严重: The scratchDir you specified: C:\Program Files\apache-tomcat-7.0.23\work\Catalina\localhost\_ is unusable.
2012-9-25 21:27:51 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-apr-8080"]
2012-9-25 21:27:51 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-apr-8009"]
2012-9-25 21:27:51 org.apache.catalina.startup.Catalina start
信息: Server startup in 1244 ms
2012-9-25 21:28:19 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [jsp] in context with path [] threw exception [java.lang.IllegalStateException: No output folder] with root cause
java.lang.IllegalStateException: No output folder
at org.apache.jasper.JspCompilationContext.createOutputDir(JspCompilationContext.java:738)
at org.apache.jasper.JspCompilationContext.getOutputDir(JspCompilationContext.java:196)
at org.apache.jasper.JspCompilationContext.getClassFileName(JspCompilationContext.java:581)
at org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:461)
at org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:425)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:639)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1815)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)