I fixed the nasty infinite loop bug but there is still a periodic failure happening during POST's.
I don't know if the failed POST's are a mod_jk bug or a problem with the remote clients HTTP POST. It happens infrequently. I just haven't had the time to try and track it down any further. What I saw was the mod_jk side kept the socket open but never completed sending the post data that was set in the content length. This left the Processor in an infinite loop trying to read from the socket. On the mod_jk side it can detect when the remote client goes away, it then closes the connection it has to Tomcat. Which would then cause the AJP Processor read to fail. Regards, Glenn Rossen Raykov wrote: > I suspected that this may be related to that old issue since it disappeared > after the upgrade to 4.0.4. > I believe it is connected to the ajp13 protocol but I can not prove it. > The strangest thing is the length of the posted request - it is always power > of 1K. > > BW you said that you fix the Processor but how you are detecting that the > connection to the httpd is closed without any changes in the C binary? > As I remember in the old "version" of this bug there was an infinite data > exchange between the httpd and Tomcat. > At that time trus was reporting something like: > > 0.0703 recv(26, 0xFFBEE4A0, 4, 0) = 4 > 0xFFBEE4A0: " A B\003" > 0.0710 recv(26, 0x0025D888, 3, 0) = 3 > 0x0025D888: "061FFA" > 0.0715 send(26, 0x0025F890, 4, 0) = 4 > 0x0025F890: "12 4\0\0" > 0.0720 recv(26, 0xFFBEE4A0, 4, 0) = 4 > 0xFFBEE4A0: " A B\003" > 0.0723 recv(26, 0x0025D888, 3, 0) = 3 > 0x0025D888: "061FFA" > 0.0727 send(26, 0x0025F890, 4, 0) = 4 > > Was this completely because tomcat connector only? > > Regards, > Rossen > > > >>-----Original Message----- >>From: Glenn Nielsen [mailto:[EMAIL PROTECTED]] >>Sent: Wednesday, September 11, 2002 11:06 AM >>To: Tomcat Users List >>Subject: Re: POST request processing failure >> >> >>Hah! Back many months ago the problem you are reporting would cause >>an infinite loop in the Processor. So I fixed the infinite loop bug >>and added code to report when these POST problems occur. I don't know >>what the source of the problem is, perhaps the remote client >>is aborting >>the connection before the POST completes? If you find out >>the source of >>the problem please let me know! >> >>Regards, >> >>Glenn >> >>Rossen Raykov wrote: >> >>>I have Tomcat 4.0.4/Struts 1.0.2 with Apache 1.3.26 connected by >>>mod_jk/1.2.0, ajp13 protocol, running on Sparc Solaris 8. >>>The problem that I have is that from time to time there are >> >>500 errors in my >> >>>Apache log. >>>The corresponding error on Tomcat side is: >>> >>>java.lang.RuntimeException: Read of HTTP Request POST >> >>parameters failed: >> >>>read < content length >>> >>>A complete trace is included in the bottom of the e-mail. >>>This only happens during POST request. >>>According to the log it happened with many different >> >>browsers including MSIE >> >>>5 and 6 and different Netscape flavors, that's why I >> >>believe this is not a >> >>>browser related issue. >>>The logged posted data size is either 4276 or 1024 bytes >> >>and the reported >> >>>time processing varies from 1 to more than 7000 seconds! >>> >>>I saw some similar postages but without any useful answers >> >>or comments. >> >>>Is that a known/common bug and is there any solution for it? >>> >>>Regards, >>>Rossen >>> >>>----------- COMPLETE ERROR TRACE ------------- >>>java.lang.RuntimeException: Read of HTTP Request POST >> >>parameters failed: >> >>>read < content length >>> at >>> >> >>org.apache.catalina.connector.HttpRequestBase.parseParameters( >>HttpRequestBas >> >>>e.java:658) >>> at >>> >> >>org.apache.catalina.connector.HttpRequestBase.getParameterName >>s(HttpRequestB >> >>>ase.java:723) >>> at >>> >> >>org.apache.catalina.connector.RequestFacade.getParameterNames( >>RequestFacade. >> >>>java:165) >>> at >>>org.apache.struts.util.RequestUtils.populate(RequestUtils.java:743) >>> at >>> >> >>org.apache.struts.action.ActionServlet.processPopulate(ActionS >>ervlet.java:20 >> >>>61) >>> at >>> >> >>org.apache.struts.action.ActionServlet.process(ActionServlet.j >>ava:1564) >> >>> at >>> >> >>org.apache.struts.action.SecureActionServlet.process(D:/CvsPro >>jects/StrutsEx >> >>>tTry/src/org/apache/struts/action/SecureActionServlet.java:97) >>> at >>> >> >>org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:510) >> >>> at >> >>javax.servlet.http.HttpServlet.service(HttpServlet.java:760) >> >>> at >> >>javax.servlet.http.HttpServlet.service(HttpServlet.java:853) >> >>> at >>> >> >>org.apache.catalina.core.ApplicationFilterChain.internalDoFilt >>er(Application >> >>>FilterChain.java:247) >>> at >>> >> >>org.apache.catalina.core.ApplicationFilterChain.doFilter(Appli >>cationFilterCh >> >>>ain.java:193) >>> at >>> >> >>org.apache.catalina.core.StandardWrapperValve.invoke(StandardW >>rapperValve.ja >> >>>va:243) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>66) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invoke(StandardPipel >>ine.java:472) >> >>> at >>> >> >>org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) >> >>> at >>> >> >>org.apache.catalina.core.StandardContextValve.invoke(StandardC >>ontextValve.ja >> >>>va:190) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>66) >>> at >>> >> >>org.apache.catalina.authenticator.AuthenticatorBase.invoke(Aut >>henticatorBase >> >>>.java:475) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>64) >>> at >>> >> >>org.apache.catalina.valves.CertificatesValve.invoke(Certificat >>esValve.java:2 >> >>>46) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>64) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invoke(StandardPipel >>ine.java:472) >> >>> at >>> >> >>org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) >> >>> at >>> >> >>org.apache.catalina.core.StandardContext.invoke(StandardContex >>t.java:2347) >> >>> at >>> >> >>org.apache.catalina.core.StandardHostValve.invoke(StandardHost >>Valve.java:180 >> >>>) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>66) >>> at >>> >> >>org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDi >>spatcherValve. >> >>>java:170) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>64) >>> at >>> >> >>org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReport >>Valve.java:170 >> >>>) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>64) >>> at >>> >> >>org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValv >>e.java:468) >> >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>64) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invoke(StandardPipel >>ine.java:472) >> >>> at >>> >> >>org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) >> >>> at >>> >> >>org.apache.catalina.core.StandardEngineValve.invoke(StandardEn >>gineValve.java >> >>>:174) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invokeNext(StandardP >>ipeline.java:5 >> >>>66) >>> at >>> >> >>org.apache.catalina.core.StandardPipeline.invoke(StandardPipel >>ine.java:472) >> >>> at >>> >> >>org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) >> >>> at >>> >> >>org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:458) >> >>> at >>>org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:551) >>> at java.lang.Thread.run(Thread.java:536) >>> >>>--- >>>Rossen Raykov >>>COGNICASE U.S.A. Inc. >>>(908) 860-1100 Ext. 1140 >>>[EMAIL PROTECTED] >>> >>>-- >>>To unsubscribe, e-mail: >> >><mailto:[EMAIL PROTECTED]> >> >>>For additional commands, e-mail: >> >><mailto:[EMAIL PROTECTED]> >> >> >> >> >>-- >>To unsubscribe, e-mail: >><mailto:[EMAIL PROTECTED]> >>For additional commands, e-mail: >><mailto:[EMAIL PROTECTED]> >> > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
