Hi Rainer, I just use mod_jk to connect apache to tomcat. I don't do anything special with the configurations: i just have a few virtual hosts that contain a few JkMounts and some apache rewrites. Do you think switching to mod_proxy_ajp would make the problem go away?
Thanks, Dave Rainer Jung-3 wrote: > > dave.smith schrieb: >> Yesterday, I upgraded our dev environment to mod_jk 1.2.26, which >> couldn't >> have been easier. It will probably take me a couple of days before I can >> get this done in production, though. >> >> I terminate all HTTPS requests before they get to the web server, so from >> what you have described, it is probably safe to disable the APR >> connector. >> How do I disable it, though? I will look into disabling this after I >> have >> updated mod_jk in production. > > Locate the tcnative shared object file (tcnative.so or tcnative-1.so) > and renme it, so that the linker loader does not find it (e.g. add an > underscore at the end of the file name). > > Then during the next startup, Tomcat should emit an info level log > message telling you, that it couldn't find the lib. > >> Here's the full stack trace for that exception, displayed in my Tomcat >> logs: >> >> Jul 10, 2008 10:06:50 PM org.apache.catalina.connector.Request >> parseParameters >> WARNING: Exception thrown whilst processing POSTed parameters >> java.io.IOException: Socket read failed >> at >> org.apache.coyote.ajp.AjpAprProcessor.read(AjpAprProcessor.java:1037) >> at >> org.apache.coyote.ajp.AjpAprProcessor.readMessage(AjpAprProcessor.java:1158) >> at >> org.apache.coyote.ajp.AjpAprProcessor.receive(AjpAprProcessor.java:1090) >> at >> org.apache.coyote.ajp.AjpAprProcessor$SocketInputBuffer.doRead(AjpAprProcessor.java:1228) >> 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.getParameterNames(Request.java:1047) >> at >> org.apache.catalina.connector.RequestFacade.getParameterNames(RequestFacade.java:369) >> at >> org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1225) >> at >> org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:821) >> at >> org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254) >> 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:213) >> 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:595) > > OK, thanks. You are sure it is not 5.5.26? > > Regards, > > Rainer > >> Rainer Jung-3 wrote: >>> Hi David, >>> >>> dave.smith schrieb: >>>> Hi Rainer, >>>> >>>> Thanks a lot for the reply. >>>> >>>> I am using Tomcat 5.5.25 (rpm from jpackage.org). CentOS Linux 2.6.18. >>>> >>>> httpd was compiled in prefork mode. The prefork settings are: >>>> >>>> StartServers 8 >>>> MinSpareServers 5 >>>> MaxSpareServers 20 >>>> ServerLimit 256 >>>> MaxClients 256 >>>> MaxRequestsPerChild 4000 >>>> >>>> I have setup JMeter to run against a test environment, but was unable >>>> to >>>> reproduce. These random responses occur in production about once every >>>> week >>>> or so/more. The problem will often (temporarily) correct itself, but >>>> sometimes I will need to restart httpd if the problem persists -- >>>> restarting >>>> tomcat also works to temporarily correct the problem. >>>> >>>> The only thing strange that I see in my logs are in the >>>> test_client.log: >>>> >>>> WARNING: Exception thrown whilst processing POSTed parameters >>>> java.io.IOException: Socket read failed >>>> at >>>> org.apache.coyote.ajp.AjpAprProcessor.read(AjpAprProcessor.java:1037) >>>> ... >>> Thanks for the information. What is "test_client.log"? It looks like a >>> Tomcat log file? Could you also post a larger part of the stack, or do >>> you only get one line? >>> >>> Would you be able to do the following two things, maybe not both at the >>> same time: >>> >>> - disable the apr connector (tcnative.so) >>> - upgrade jk to 1.2.26 >>> >>> Concerning the apr connector: If you are using OpenSSL with apr and >>> Tomcat or you have some similar reason you really need it, then don't >>> switch. But if you use it without a very specific reason, disabling it >>> for a week or two would help us isolate the problem. >>> >>> Concerning mod_jk upgrade: That should be very easy, apart from the >>> following: if your httpd uses VirtualHost in the configuration, you have >>> to include your JkMount inside the VirtualHost, not in the global part, >>> or you add JkMountCopy On to the VirtualHost. >>> >>> Regards, >>> >>> Rainer >>> >>>> Rainer Jung-3 wrote: >>>>> dave.smith schrieb: >>>>>>> Wow. That's weird. Is Tomcat serving the file, or is httpd serving >>>>>>> it? >>>>>> Not too weird. I am experiencing the same thing with Tomcat 5.5 and >>>>>> mod_jk >>>>>> 1.2.23. I have Tomcat serving everything. >>>>>> >>>>>> I am also using a load balancer that sends an OPTION every 2 seconds >>>>>> to >>>>>> each >>>>>> web server to make sure that the server is alive. >>>>>> >>>>>> This intermittent random response issue is really killing me. >>>>> Could you please also add some info: >>>>> >>>>> Tomcat version? >>>>> >>>>> And from my previous mail: >>>>> >>>>> What's you platform and which httpd MPM (prefork orworker or something >>>>> else) do you use? For some platforms (e.g. AIX) the detection of >>>>> multi-threading in httpd during mpod_jk build-time was broken. >>>>> Starting >>>>> with 1.2.24 we build always including multi-thread support unless >>>>> explicitely stated via a configure option. If you 1.2.23 build is not >>>>> thread safe, but your httpd uses threads (like with worker mpm), then >>>>> such trouble is possible, although more likely you would see crashes >>>>> etc. For most platforms like Linux and Solaris the threading detection >>>>> was OK already before 1.2.24. >>>>> >>>>> Another possible (but not very likely) cause could be bug 44494 of >>>>> Tomcat 6.0.16/5.5.26 which under certain circumstances could leave >>>>> data >>>>> in the request object after request handling completed. You could try >>>>> either downgrading to 6.0.15/5.5.25 or upgrading to the soon to be >>>>> expected 6.0.17/5.5.27. >>>>> >>>>> I would also add the access log on the Tomcat side. If you find the >>>>> same >>>>> phenomenon there, then it's unlikely, that httpd/mod_jk are >>>>> responsible >>>>> and the reason should be inside Tomcat or the webapp. >>>>> >>>>> Can you reproduce the problem on a test system? >>>>> >>>>> Regards, >>>>> >>>>> Rainer > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/Apache-mod_jk-serves-random-files-from-tomcat-tp18385568p18515074.html Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
