做上傳附件時候出現這個問題，幫忙看看
做了個上傳附件的功能，在上傳大附件（大於30M）的時候，預期是會彈出提示框，警告用戶。但是結果運行的時候，後臺報這個錯，都沒有運行到action中去。

在本地運行的時候，上傳功能都好好的，運行在服務器上的時候，就會報這個錯

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2012-08-09 11:46:40,666 WARN [org.apache.struts2.dispatcher.multipart.MultiPartRequest] - <Unable to parse request>
org.apache.commons.fileupload.FileUploadBase$IOFileUploadException: Processing of multipart/form-data request failed. Stream ended unexpectedly
at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:367)
at org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest.parseRequest(JakartaMultiPartRequest.java:145)
at org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest.processUpload(JakartaMultiPartRequest.java:88)
at org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest.parse(JakartaMultiPartRequest.java:80)
at org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper.<init>(MultiPartRequestWrapper.java:75)
at org.apache.struts2.dispatcher.Dispatcher.wrapRequest(Dispatcher.java:709)
at org.apache.struts2.dispatcher.ng.PrepareOperations.wrapRequest(PrepareOperations.java:131)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilter.doFilter(StrutsPrepareFilter.java:79)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.commons.fileupload.MultipartStream$MalformedStreamException: Stream ended unexpectedly
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:983)
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:887)
at java.io.InputStream.read(InputStream.java:85)
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.FileUploadBase.parseRequest(FileUploadBase.java:362)
... 23 more


------解决方案--------------------
服务器有限制吧