Thanks, Chris. To respond to your remarks: 1) The warnings, "AJP13 protocol: Reuse is set to false", are being logged by Tomcat (in the Tomcat AJP connector logs).
2) As I mentioned earlier, the versions and settings of the servers (and their respective IIS web servers) are the same. In any case I have discovered "how" the warning occurs. It is indeed triggered by the REST API. The culprit is a REST request in the form: http://www.ourdomain.com/api/srv2/exercises/93/1431/26346/ping It is a POST request and "ping" is a custom REST method. It is just a ping, so the status code of the response is 204 ("No Content"). I can confirm that every ping request results in the warning "AJP13 protocol: Reuse is set to false" being written to Tomcat's connector logs. Researching this on the web, I found the suggestion to add allowedRequestAttributesPattern=".*" to the AJP connector in server.xml. Is this a viable solution? Alfred -----Oorspronkelijk bericht----- Van: Christopher Schultz <ch...@christopherschultz.net> Verzonden: 12 June 2020 19:49 Aan: Tomcat Users List <users@tomcat.apache.org> Onderwerp: Re: Warning "AJP13 protocol: Reuse is set to false" written logs every second of every day. Please help. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Alfred, On 6/12/20 05:52, Alfred Bakia wrote: > Thanks, Jon. I did in fact compare all the settings between the > servers, including the logging settings. They are exactly the same.> > But there is new information. In a detailed comparison of the Java > code between the servers, I spotted one difference. > Something sets apart the instance that is logging the Warning > "AJP13 protocol: Reuse is set to false". The instance includes a REST > API. As Sherlock Holmes said, "When you have eliminated all which is > impossible, then whatever remains, however improbable, must be the > truth." > > I am now looking into how the combination REST - Tomcat - IIS can > trigger the warning. ...but this is being logged on the IIS side, not the Tomcat side. It's very unlikely that the application is causing these log messages to be displayed. Same version(s) of IIS? Same versions of mod_jk? - -chris > -----Oorspronkelijk bericht----- Van: > jonmcalexan...@wellsfargo.com.INVALID <jonmcalexan...@wellsfargo.com.INVALID> > Verzonden: 11 June 2020 23:57 Aan: users@tomcat.apache.org > Onderwerp: RE: Warning "AJP13 protocol: Reuse is set to false" > written logs every second of every day. Please help. > > Perhaps also compare your logging sensitivity between the servers. > > > Dream * Excel * Explore * Inspire Jon McAlexander Asst Vice President > > Middleware Product Engineering Enterprise CIO | Platform Services > | Middleware | Infrastructure Solutions > > 8080 Cobblestone Rd | Urbandale, IA 50322 MAC: F4469-010 Tel > 515-988-2508 | Cell 515-988-2508 > > jonmcalexan...@wellsfargo.com > > > This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. > > -----Original Message----- From: Christopher Schultz > <ch...@christopherschultz.net> Sent: Thursday, June 11, 2020 12:55 PM > To: users@tomcat.apache.org Subject: Re: Warning "AJP13 > protocol: Reuse is set to false" written logs every second of every day. Please help. > > Alfred, > > On 6/11/20 11:57, Alfred Bakia wrote: >> Hi Everyone, > >> This is my very first mail to the users list since joining yesterday. >> Not an auspicious start. But I hope I will be able to contribute in >> future. I seek your help for a persistent issue in one of our >> ColdFusion instances. > >> Description of issue: ColdFusion 2018 is an application server that >> uses Tomcat 9.0.21. Our ColdFusion installation consists of >> instances. The instances are independent application servers, each >> with its own Tomcat installation and Java Virtual Machine. >> The Java version is 11.0.7. > >> Each ColdFusion instance serves web content via the web server IIS. >> We have configured an AJP connector for the communication between >> Tomcat and IIS. The relevant settings are > > >> * In server.xml > >> <Connector port="8012" connectionTimeout="60000" >> redirectPort="8445" protocol="AJP/1.3" >> tomcatAuthentication="false" maxThreads="500" >> packetSize="65535"/> > > >> * In isapi_redirect.properties > >> iis_buffer_enable= true > > >> * In workers.properties > >> worker.list=sr1studierdr1 > >> worker.sr1studierdr1.type=ajp13 > >> worker.sr1studierdr1.host=localhost > >> worker.sr1studierdr1.port=8012 > >> worker.sr1studierdr1.connection_pool_size=800 > >> worker.sr1studierdr1.connection_pool_timeout=60 > >> worker.sr1studierdr1.max_reuse_connections=400'' > >> On one of the instances (name: 'sr1studierdr1'), the following >> WARNING is written to isapi_redirect.log every second or so: > > >> * [Thu Jun 11 16:44:57.739 2020] [11308:15392] [warn] >> ajp_process_callback::jk_ajp_common.c (2242): (sr1studierdr1) >> AJP13 protocol: Reuse is set to false > >> Nevertheless, the application seems to work as intended. > >> We're at a loss why this is happening only to this particular >> instance. There are no such warnings in other instances that share >> exactly the same settings. > >> Do you know what is causing the warning, "AJP13 protocol: Reuse is >> set to false", or how to solve this? > > I have no idea, but Google seemed able to come up with this: > > https://forums.iis.net/t/1229345.aspx?Error+AJP13+protocol+Reuse+is+se t+ > > > to+false+on+log+file+ > > Does that help at all? > > Apache httpd configuration of mod_jk has a DisableReuse flag that can > be set, but I don't see such a thing for IIS. > > -chris > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl7jv+4ACgkQHPApP6U8 pFh9bQ//XJJC7WtVsrhOLuOxXUTpJPwcnTxpGnSZbttYn1uu6mTKoCLO21ldGMF8 TKIf3YFw7oRhMG4zD8XTlSEWG/G2JQoJ1173q0OQlKeMEC3WSHf7hCwxI3h4tA3W L+WMkOFtVk0ij7krkKrShro9R1doMhuUN1PUarJNZNSFkyw+DvI7UD1rtBZqGH2f aS5xLuu0FDftOPRDFVibeTLKOqnWPt6ktuzENshm/cvRN16vh+f7OwwCHL9XM6y3 2cOaSg+Iljeh23deHmMSO1SUVcXilKIpekXB7/7HcShJhT7DpYTAOfjbnpBsXKoF XLn0KrX72ATgfNKZyYQVyq6xqPlVkJ770YjX9BOfpknteGO90l9xTROt3UhHaFt9 1C83HbsSsqUL6kGpC7keV8QfRbdUG5J/53YDisQ+Pibwuo0BfIkeGYPF3INbFWUW rvipohO9ahjQu/0jLDj1gYXJEi/OWC03ZOAFawojX8tyUAyKnDPoV0DJWj+S7eT4 o3A8Wh4JClJL+u3yR6OHiOFzTylHvWsuONEqxJfNGuloqtoMocslgEgfIZdoMh9H ewtJEoU3YvNyW1X7EdILHN6kmtKpmyQfASiFdbPaQsP8J/WYxCT/7Rz/7u2FwAfd hkgqPUaUPE6PPmvjBN8k5ZZ2/PH46rYqRZp6Ef5r7e9FKArVJHw= =kzJw -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
