tomcat上传文件偶见异常

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#tomcat #上传文件

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本文介绍了解决Tomcat服务器文件上传时出现的超时问题。通过调整Tomcat配置文件中的disableUploadTimeout和connectionUploadTimeout参数，可以有效延长文件上传的超时时间。

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我的服务为数据接收服务，上传文件也是由程序模拟上传，是由httpclient写的上传文件，因为本身上传的时候并没有在程序中设置请求超时时间，所以在接收的服务中就会发现了如下的错误：

org.apache.commons.fileupload.FileUploadException: Stream ended unexpectedly
	at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:362)
	at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:115)
	at com.ihangmei.datapro.receive.servlet.ReceiveServlet.doPost(ReceiveServlet.java:46)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1083)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:640)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.commons.fileupload.MultipartStream$MalformedStreamException: Stream ended unexpectedly
	at org.apache.commons.fileupload.MultipartStream.readHeaders(MultipartStream.java:540)
	at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:1038)
	at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.hasNext(FileUploadBase.java:1106)
	at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:339)
	... 24 more
Caused by:
org.apache.commons.fileupload.MultipartStream$MalformedStreamException: Stream ended unexpectedly
	at org.apache.commons.fileupload.MultipartStream.readHeaders(MultipartStream.java:540)
	at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:1038)
	at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.hasNext(FileUploadBase.java:1106)
	at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:339)
	at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:115)
	at com.ihangmei.datapro.receive.servlet.ReceiveServlet.doPost(ReceiveServlet.java:46)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1083)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:640)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

org.apache.commons.fileupload.FileUploadBase$IOFileUploadException: Processing of multipart/form-data request failed. Read timed out
	at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:351)
	at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:115)
	at com.ihangmei.datapro.receive.servlet.ReceiveServlet.doPost(ReceiveServlet.java:46)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1083)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:640)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.SocketTimeoutException: Read timed out
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
	at java.net.SocketInputStream.read(SocketInputStream.java:171)
	at java.net.SocketInputStream.read(SocketInputStream.java:141)
	at org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:532)
	at org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:501)
	at org.apache.coyote.http11.InternalInputBuffer$InputStreamInputBuffer.doRead(InternalInputBuffer.java:563)
	at org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFilter.java:137)
	at org.apache.coyote.http11.AbstractInputBuffer.doRead(AbstractInputBuffer.java:339)
	at org.apache.coyote.Request.doRead(Request.java:438)
	at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:290)
	at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:449)
	at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:315)
	at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:200)
	at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:999)
	at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:903)
	at java.io.InputStream.read(InputStream.java:101)
	at org.apache.commons.fileupload.util.Streams.copy(Streams.java:100)
	at org.apache.commons.fileupload.util.Streams.copy(Streams.java:70)
	at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:347)
	... 24 more

因为并不打算修改程序去设置请求超时时间，所以在tomcat的配置文件中做了些文章：

disableUploadTimeout:

This flag allows the servlet container to use a different, usually longer connection timeout during data upload. If not specified, this attribute is set to true which disables this longer timeout.

这个标志允许servlet容器在数据上传期间使用不同的，通常较长的连接超时。如果未指定，此属性将设置为true，禁用此长时超时。

所以我将该属性设为了false，也就是不禁用，启用这个超时设置：

<Connector port="8997" protocol="HTTP/1.1"
               connectionTimeout="180000"
               redirectPort="8443"  maxPostSize="20971520" disableUploadTimeout="false" connectionUploadTimeout="300000"/>

搭配connectionUploadTimeout一起使用，超过这个时间才认为超时，关闭上传数据流。

所以这样可以解决一些问题，当然最好在httpClient请求的时候就设置超时时间最好，不过文件上传这种特定场景的情况下也不确定多长时间可以传完，尤其是网络不好的情况下，所以还是在服务端tomcat这边做一些文章是可以的。