控制台报Connection reset有关问题（转）
控制台报Connection reset问题（转）
最近启动tomcat时总是报有一些错，一开始没怎么注意，因为对项目操作没什么大的影响，今天闲下来看了看。
[2011-02-28 10:36:01] - getParameters() org.apache.commons.fileupload.FileUploadException: Connection reset at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:381) at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126) at eg.java.net.web.jspx.engine.util.RequestUtil.getParameters(RequestUtil.java:44) at eg.java.net.web.jspx.ui.pages.Page.loadMultiPartForm(Page.java:394) at eg.java.net.web.jspx.ui.pages.Page.continueServing(Page.java:220) at eg.java.net.web.jspx.engine.RequestHandler.start(RequestHandler.java:156) at eg.java.net.web.jspx.engine.RequestHandler.doPost(RequestHandler.java:63) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at com.inspur.filter.CharsetFilter.doFilter(CharsetFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) at java.lang.Thread.run(Thread.java:595) Caused by: java.net.SocketException: Connection reset at java.net.SocketInputStream.read(SocketInputStream.java:168) at org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:748) at org.apache.coyote.http11.InternalInputBuffer$InputStreamInputBuffer.doRead(InternalInputBuffer.java:778) at org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFilter.java:116) at org.apache.coyote.http11.InternalInputBuffer.doRead(InternalInputBuffer.java:713) at org.apache.coyote.Request.doRead(Request.java:419) at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:264) at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:403) at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:279) at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:193) at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:977) at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:887) at java.io.InputStream.read(InputStream.java:89) at org.apache.commons.fileupload.util.Streams.copy(Streams.java:94) at org.apache.commons.fileupload.util.Streams.copy(Streams.java:64) at org.apache.commons.fileupload.MultipartStream.readBodyData(MultipartStream.java:593) at org.apache.commons.fileupload.MultipartStream.discardBodyData(MultipartStream.java:619) at org.apache.commons.fileupload.MultipartStream.skipPreamble(MultipartStream.java:638) at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:961) at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:942) at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:331) at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:349) ... 25 more Caused by: java.net.SocketException: Connection reset at java.net.SocketInputStream.read(SocketInputStream.java:168) at org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:748) at org.apache.coyote.http11.InternalInputBuffer$InputStreamInputBuffer.doRead(InternalInputBuffer.java:778) at org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFilter.java:116) at org.apache.coyote.http11.InternalInputBuffer.doRead(InternalInputBuffer.java:713) at org.apache.coyote.Request.doRead(Request.java:419) at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:264) at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:403) at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:279) at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:193) at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:977) at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:887) at java.io.InputStream.read(InputStream.java:89) at org.apache.commons.fileupload.util.Streams.copy(Streams.java:94) at org.apache.commons.fileupload.util.Streams.copy(Streams.java:64) at org.apache.commons.fileupload.MultipartStream.readBodyData(MultipartStream.java:593) at org.apache.commons.fileupload.MultipartStream.discardBodyData(MultipartStream.java:619) at org.apache.commons.fileupload.MultipartStream.skipPreamble(MultipartStream.java:638) at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:961) at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:942) at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:331) at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:349) at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126) at eg.java.net.web.jspx.engine.util.RequestUtil.getParameters(RequestUtil.java:44) at eg.java.net.web.jspx.ui.pages.Page.loadMultiPartForm(Page.java:394) at eg.java.net.web.jspx.ui.pages.Page.continueServing(Page.java:220) at eg.java.net.web.jspx.engine.RequestHandler.start(RequestHandler.java:156) at eg.java.net.web.jspx.engine.RequestHandler.doPost(RequestHandler.java:63) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at com.inspur.filter.CharsetFilter.doFilter(CharsetFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) at java.lang.Thread.run(Thread.java:595)
网上一些说法：
1,网络编程时未正确捕获java.net.SocketException,客户端先关闭就会报这个异常;
2,数据库和应用服务器的网段不同.
b。好像说防火墙的比较多。。。。
大部分是网络的原因。提交post的东西多，然后服务器接收就超时了。。。
c。如果weblogic server和数据库服务器不在同一台主机，会经常有这种情况，我也遇到过，不过好像的确不怎么影响使用
d。从根本上说是weblogic sp2的bug
e。一般是有些客户端已关闭，一些线程因为延迟等原因觉察不到此连接已结束，继续等到到出错或是 客户端那里不停刷或一个访问/刷新没完成前再刷，要让这个无用的线程死掉和这个错误如果不影响应用运行的话大可不必理会。有一种抛出这个异常的情况是：
浏览器请求了一个服务器端资源，在响应回来之前转而请求其他的资源。这个时候最初的浏览器跟服务器的连接中断，服务器的peer程序就会reset那个connection。
我的Tomcat是在本机启动的，而DB2数据库是用的虚拟机里的，不在一个网段，可能是这个原因吧。把应用部署到虚拟机上，错误消失。
但断掉网线，本机和虚拟机就在一个网段里了，但是依然报错，郁闷。