Tomcat异常搜集

org.apache.catalina.loader.WebappClassLoader loadClass

信息: Illegal access: this web application instance has been stopped already.  Could not load com.mysql.jdbc.SQLError.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1244)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3246)
at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:1656)
at com.mysql.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:4261)
at com.mysql.jdbc.ConnectionImpl.cleanup(ConnectionImpl.java:1248)
at com.mysql.jdbc.ConnectionImpl.finalize(ConnectionImpl.java:2655)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Unknown Source)
at java.lang.ref.Finalizer.access$100(Unknown Source)
at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)
2011-8-12 22:57:15 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring root WebApplicationContext
log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).
log4j:WARN Please initialize the log4j system properly.

解决方案：tomcat关闭重启，重新部署，ok啦 ；具体原因不详。。。。
参考资料： http://apps.hi.baidu.com/share/detail/7263674
          http://blog.csdn.net/m232341339/article/details/3201104
          http://hi.baidu.com/fttp/blog/item/5fa4be3dd4faca0dbaa167f2.html    http://topic.csdn.net/u/20090610/09/a61283e6-e383-4cd7-a6d4-e1fbf0780706.html

ssh整合时，报错。。。
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool at java.lang.Class.getDeclaredConstructors0(Native Method)

解决方案：common-pool.jar 少这个jar包 ，导进ok
参考资料：http://hi.baidu.com/zhangjunmei54/blog/item/3ac17f06379674c77a894706.html

出现Servlet action is not available 的问题解决方法： 
检查lib中spring-web.jar包是否存在，如不存在，则从myeclipse中找到spring-web.jar,复制到发布的lib目录中。

问题：
Thread-1] ERROR org.springframework.web.struts.ContextLoaderPlugIn - Context initialization failed
org.springframework.beans.factory.BeanDefinitionStoreException: Error registering bean with name 'myDataSource' defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]: Class that bean class [org.apache.commons.dbcp.BasicDataSource] depends on not found; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
加入commons-pool.jar包。问题解决 

信息: Illegal access: this web application instance has been stopped already. Could not load java.net.BindException. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1249)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1209)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at com.mysql.jdbc.CommunicationsException.<init>(CommunicationsException.java:135)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2638)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2551)
at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:1303)
at com.mysql.jdbc.Connection.realClose(Connection.java:2030)
at com.mysql.jdbc.Connection.cleanup(Connection.java:2764)
at com.mysql.jdbc.Connection.finalize(Connection.java:1945)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Unknown Source)
at java.lang.ref.Finalizer.access$100(Unknown Source)
at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)

解决：

这是由于 MySQL 的 JDBC 驱动放在应用的 WEB-INF\lib 目录下，在重新发布时其加载了两次，故只要将其拷贝到 TOMCAT_HOME%\lib 中即可解决该问题。

解决这两个异常可以将 MySQL 的驱动文件从 WEB-INF\lib 文件夹中移动到 %TOMCAT_HOME%\lib 中。

信息: Illegal access: this web application instance has been stopped already.  Could not load java.net.BindException.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1244)
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
 at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
 at com.mysql.jdbc.CommunicationsException.<init>(CommunicationsException.java:155)
 at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2723)

解决办法: 
将tomcat的server.xml中的Context的reloadable设成false。
比如:<Context path="/expert" docBase="expert" debug="0" reloadable="false">

 

解决办法也容易，只要把tomcat的server.xml 中的reloadable="true" 改成false就行了，不过这样做就失去了热部署的优势了，对于开发不是很方便，干脆还是不改吧。这种错误不用理会.   

报错原理：

 

原因是因为在tomcat重启的时候，因为之前的tomcat中的线程还没有完全关闭，新启动tomcat就会报这个异常，不过这个不影响正常使用，只是跳个异常挺烦人的。使用过hibernate, spring或其他大型组件，当一个WEB应用系统中有很多类时，如果开启了Tomcat的reloadable=true,那么每当相关文件改变时， Tomcat会停止web app并释放内存,然后重新加载web app.这实在是个浩大的工程。所以我们总是在想如果能有只重载某几个类的功能，将极大的满足了我们的调试。

  当response.sendRedirect("xxxx");   时,而客户端关闭了浏览器,就会出这种错.     
  并非程序错误.

org.apache.jasper.JasperException: Unable to compile class for JSP: 
An error occurred at line: 16 in the generated java file
Only a type can be imported. com.bplead.kmg.KMView resolves to a package
Stacktrace:
at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)
at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:331)
at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:469)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1047)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:817)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:669)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:585)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
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 wt.httpgw.filter.WTContextBeanFilter.doWithWtContextBeanHandler(WTContextBeanFilter.java:98)
at wt.httpgw.filter.WTContextBeanFilter.doFilter(WTContextBeanFilter.java:58)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at wt.servlet.CompressionFilter.doFilter(CompressionFilter.java:248)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at wt.servlet.RequestInterrupter.doFilter(RequestInterrupter.java:325)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at wt.servlet.ServletRequestMonitor.doFilter(ServletRequestMonitor.java:1605)
at wt.servlet.ServletRequestMonitorFilter.doFilter(ServletRequestMonitorFilter.java:56)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
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.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
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:662)
at org.apache.tomcat.util.threads.TaskThread.run(TaskThread.java:77)