java - 如何修复或处理部署在 Apache Tomcat 7.0.41 中的 Java Struts 1.3 应用程序中的 File Reaper 线程内存泄漏问题？

Question

我已经在 Apache Tomcat 7.0.41 中部署了一个 Struts 1.3 Web 应用程序。 tomcat 服务器似乎经常挂起并且无法处理任何请求，在浏览器上显示页面未找到错误，类似于停止的 tomcat 服务器，但实际上在 Windows 服务中，tomcat 服务仍显示为已启动。重启后服务器工作正常。

Apache Software Foundation\Tomcat 7.0\logs\tomcat7-stderr.2013-07-05.log 中记录了以下错误

Jul 5, 2013 11:57:48 AM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
    SEVERE: The web application [/pms] appears to have started a thread named [File Reaper] but has failed to stop it. This is very likely to create a memory leak.
    Jul 5, 2013 11:57:53 AM org.apache.coyote.AbstractProtocol stop
    INFO: Stopping ProtocolHandler ["http-bio-8085"]
    Jul 5, 2013 11:57:54 AM org.apache.coyote.AbstractProtocol stop
    INFO: Stopping ProtocolHandler ["ajp-bio-8010"]
     javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
        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:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
    java.lang.NullPointerException
        at java.util.Properties$LineReader.readLine(Unknown Source)
        at java.util.Properties.load0(Unknown Source)
        at java.util.Properties.load(Unknown Source)
        at com.krwssa.log.SystemLogManager.getLogger(SystemLogManager.java:39)
        at com.krwssa.db.DatabaseConnection.<clinit>(DatabaseConnection.java:14)
        at com.krwssa.action.LoginAction.login(LoginAction.java:112)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:274)
        at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:194)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
        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:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
    Exception in thread "http-bio-8085-exec-127" java.lang.OutOfMemoryError: Java heap space
    Exception in thread "http-bio-8085-exec-133" java.lang.OutOfMemoryError: Java heap space
        at org.apache.coyote.http11.InternalInputBuffer.parseRequestLine(InternalInputBuffer.java:99)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:931)
    Exception in thread "http-bio-8085-exec-103" Exception in thread "http-bio-8085-Acceptor-0"     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
    java.lang.OutOfMemoryError: Java heap space
    Exception in thread "http-bio-8085-AsyncTimeout"    at java.net.Socket.setSoLinger(Unknown Source)
        at org.apache.tomcat.util.net.SocketProperties.setProperties(SocketProperties.java:194)
        at org.apache.tomcat.util.net.JIoEndpoint.setSocketOptions(JIoEndpoint.java:485)
        at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:228)
        at java.lang.Thread.run(Unknown Source)
    java.lang.OutOfMemoryError: Java heap space
    java.lang.OutOfMemoryError: Java heap space
    2013-07-05 06:57:58 Commons Daemon procrun stderr initialized

Web 应用程序确实包含一些具有 Struts 1.3 FormFile 元素的表单，这些元素用于将文件上传到服务器。该应用程序在 MyEclipse IDE 中配置的 Tomcat 开发模式下运行良好。看来 File Reaper 线程是罪魁祸首还是它？如何修复或处理此问题？

问候，湿婆神

Answer 1

您应该配置数据库设置以与 Tomcat 服务器一起运行。您的帖子配置未知，但我猜您只是没有在您的应用程序中包含数据库驱动程序，或者数据库驱动程序未安装在 Tomcat 服务器上。