在用戶實際
環境的tomcat日志（localhost_log.2009-06-22.txt）看到下面這個錯
引用:
2009-06-22 12:39:41 StandardWrapperValve[ajax]: Servlet.service() for servlet ajax threw exception
java.lang.IllegalStateException: Post too large
at org.apache.coyote.tomcat5.CoyoteRequest.parseRequestParameters(CoyoteRequest.java:2405)
at org.apache.coyote.tomcat5.CoyoteRequest.getParameter(CoyoteRequest.java:1073)
at org.apache.coyote.tomcat5.CoyoteRequestFacade.getParameter(CoyoteRequestFacade.java:265)
at org.ajaxanywhere.AAUtils.isAjaxRequest(AAUtils.java:34)
at org.ajaxanywhere.AAFilter.doFilter(AAFilter.java:45)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at com.thunisoft.summer.web.filter.CharsetFilter.doFilter(CharsetFilter.java:48)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
在另外一個catalina_log.2009-06-22.txt日志
文件中，有下面這句話
引用:
2009-06-22 12:39:41 CoyoteRequest Parameters were not parsed because the size of the posted data was too big. Use the maxPostSize attribute of the connector to resolve this if the application should accept large POSTs.
上網查了一下，說是tomcat默認接收的POST提交
數據最大為2M，如果沒有修改過配置post提交的數據超過這個就報上面的錯了。這個配置在%tomcat-5.0.28%conf\server.xml中的我們用到的connector節點的屬性。其中tomcat的文檔是這么描述的
引用:
maxPostSize
The maximum size in bytes of the POST which will be handled by the container FORM URL parameter parsing. The feature can be disbled by setting this attribute to a value inferior or equal to 0. If not specified, this attribute is set to 2097152 (2 megabytes).
準備復現
問題，第一個想到的就是XX系統文書保存到
數據庫，并且為ajax的post方式提交（文件上傳不會報這個錯）
代碼:
var map = new Map();
map.put("key", "fy.doceditor.updateDoc");
map.put("jzjd", jzjd);
map.put("caseType", caseType);
map.put("caseId", caseId);
map.put("docId", docId);
map.put("wsxh", wsxh);
map.put("doc", docDetail);
var query = new QueryObj(map,updated);
query.send();
所以創建了一個文書，粘貼了一個8M的word文書，點保存之后報js錯。把上面這個docDetail保存成文件，發現大小為7.94 MB (8,332,134 字節)，檢查日志有post too large錯。
按照文檔描述，修改xml文件配置如下：
引用:
<Connector port="8080"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100"
debug="0" connectionTimeout="20000"
disableUploadTimeout="true" maxPostSize="0"/>
問題得到解決。
一般來說大部分post提交都是沒有問題的，但是還是要仔細考慮一下項目是否會出現這種情況，最好是修改一下tomcat的配置。有時候需要注意這個異常只會記錄在tomcat的日志文件中。
posted on 2009-06-22 17:36
歲月如歌 閱讀(1695)
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