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Java Forum / General / August 2007Tomcat: Exception thrown whilst processing POSTed parameters
Hi folks, I'm having a heck of a time trying to figure this out. I'm getting the following exception frequently in my Tomcat logs. The exception always seems to be thrown when I'm processing an AJAX request. Could I be forgetting to do something on the client side? Is this a problem with Tomcat? Could it be a problem with my code (unlikely as that is... :-\ )? Any hints would be appreciated! Thanks! Jeff Windows Server 2003 Apache Tomcat 5.5.23 JRE 1.5, Update 12 ========================= WARNING: Exception thrown whilst processing POSTed parameters java.io.IOException: Exception filling buffer with data from underlying input stream: not an EAGAIN status, so perhaps disconnected client? at org.apache.coyote.http11.InternalAprInputBuffer.fill(InternalAprInputBuffer.java: 825) at org.apache.coyote.http11.InternalAprInputBuffer $SocketInputBuffer.doRead(InternalAprInputBuffer.java:853) at org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFilter.java: 116) at org.apache.coyote.http11.InternalAprInputBuffer.doRead(InternalAprInputBuffer.java: 772) at org.apache.coyote.Request.doRead(Request.java:419) at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java: 265) at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:403) at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java: 280) at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java: 193) at org.apache.catalina.connector.Request.readPostBody(Request.java: 2400) at org.apache.catalina.connector.Request.parseParameters(Request.java: 2379) at org.apache.catalina.connector.Request.getParameter(Request.java: 1005) at org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java: 353) ... ========================= > Hi folks, > I'm having a heck of a time trying to figure this out. I'm getting [quoted text clipped - 48 lines] > ... > ========================= It is a disconnect - something fails between the browser->apache- >tomcat. The class throwing exception is basically an inputstream wrapper in tomcat to parse HTTP requests. Are you using something like Scriptaculous or any standard Ajax framework for the communication, or have you written something of your own? If latter, you might want to try using Scriptaculous/Prototype and see if the error goes away. -cheers, Manish Hi Manish, Thanks for your response. After much additional searching, I've discovered that this is a bug with Tomcat 5.5.23. (http:// issues.apache.org/bugzilla/show_bug.cgi?id=40960). I upgraded to Tomcat 6.0.13 and that solved the problem. Hope that helps someone. Jeff Hi Jeff, Thanks for the response. I have a webapp which throws a similar exception which is pasted below. I am using Tomcat 5.5.23. WARNING: Exception thrown whilst processing POSTed parameters java.io.IOException: Socket read failed at org.apache.coyote.ajp.AjpAprProcessor.read(AjpAprProcessor.java: 1035) at org.apache.coyote.ajp.AjpAprProcessor.readMessage(AjpAprProcessor.java: 1156) at org.apache.coyote.ajp.AjpAprProcessor.receive(AjpAprProcessor.java: 1088) at org.apache.coyote.ajp.AjpAprProcessor $SocketInputBuffer.doRead(AjpAprProcessor.java:1226) at org.apache.coyote.Request.doRead(Request.java:419) at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java: 265) at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:403) at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java: 280) at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java: 193) at org.apache.catalina.connector.Request.readPostBody(Request.java: 2400) at org.apache.catalina.connector.Request.parseParameters(Request.java: 2379) at org.apache.catalina.connector.Request.getParameter(Request.java: 1005) at org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java: 353) at com.ea.zoho.server.action.forms.TemplateMgr.execute(TemplateMgr.java: 28) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java: 484) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 274) at org.apache.struts.action.ActionServlet.process(ActionServlet.java: 1482) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java: 525) 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 org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 210) 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: 151) at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java: 444) at org.apache.coyote.ajp.AjpAprProtocol $AjpConnectionHandler.process(AjpAprProtocol.java:472) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java: 1286) at java.lang.Thread.run(Thread.java:619) When exactly is this "socket read failed" thrown ? I have even tried changing the maxPostSize to a maximum value, but in vain. This exception seems to be thrown for each of the post request. Please help me with some pointers to overcome this issue. Thanks, Alex Hi Alex, Sorry it took me so long to get back to you. As best as I can figure (and I'm no expert), the exception occurs when APR is parsing the POSTed parameters. Did you install the Tomcat native library (\bin \tcnative-1.dll)? I think not using the native library will solve the problem. Something in there (I think) is causing the parse of the POSTed parameters to fail. I'm not sure if you have to reinstall Tomcat to get rid of the DLL or if you can just remove the file. I have two servers, one running with the native library and one without it. The one with the native library still has this exception thrown (even after upgrading to Tomcat 6). I have not observed this issue with the server running without the native library. That's my best guess. Jeff P.S. - I just assumed you were using Windows. I don't think the Tomcat native library is supplied for any other OS. If you're not using Windows, then you can probably ignore everything I just said. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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