Re: jkstatus - Error connecting to tomcat - ajp_process_callback write failed
Hello Rainer, about the percentages ... 30% of the total requests are handled by the first tomcat server and so on ... I don't know why the 4th server is under loaded whereas the four servers are configured the same way about interpreting jkstatus ... among many others infrmations, this page shows a datatable with all the resources that have been handled by the Tomcat servers at backend side... first of all, i would like to know if is there any way to easily collect, for each server, all the handled requests ? (the table shows resources in order of requesting) -- is there any tool able to put them in order ? Then I can see resources as css, gif, js etc ... why there are visibles whereas mod_jk is supposed to redirect servlets actions to the container ? Thank you JLM Message du 07/09/09 11:43 De : Rainer Jung A : Tomcat Users List Copie à : Objet : Re: jkstatus - Error connecting to tomcat - ajp_process_callback write failed On 04.09.2009 11:42, mateo-jl wrote: Hello everybody, i got many errors about mod_jk but i don't know whether it's the good forum ... I have configured 4 tomcat identical servers reached by a front server apache through mod_jk. When I look at the jkstatus page, I can note a strange behaviour: only the same server (4) is under loaded. Regular percentages are: 1st:30% , 2nd:29%, 3rd:28, 4th:13% (note: lbfactor is the same for the 4 workers) What are therse percentages? I don't know which way I can scrutinize. I just can see a lot of errors within error.log: Error connecting to tomcat (not necessarily the 4th) or ajp_process_callback write failed. Not good. So, the question is, which are the first checkings at tomcat configuration I can do ? Read about timeouts: http://tomcat.apache.org/connectors-doc/generic_howto/timeouts.html All attributes are listed on http://tomcat.apache.org/connectors-doc/reference/workers.html Do you have an how to for interpreting jkstatus ? Not really. What about jkstatus do you want to interprete? There's a bit of information on http://tomcat.apache.org/connectors-doc/reference/status.html or is there any other way, a kind of pure tomcat tool, to check the tomcat perfs. Regards, Rainer - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: jkstatus - Error connecting to tomcat - ajp_process_callback write failed
Rainer, i've forgotten in my last message; Does these workers options are valid with mod_jk2 (mod_jk2-2.0.43.dll) ? (http://tomcat.apache.org/connectors-doc/reference/workers.html) Do you think that the following message are relative to timeouts issues ? Error connecting to tomcat (not necessarily the 4th) or ajp_process_callback write failed. Not good. Thank You JLM Message du 07/09/09 11:43 De : Rainer Jung A : Tomcat Users List Copie à : Objet : Re: jkstatus - Error connecting to tomcat - ajp_process_callback write failed On 04.09.2009 11:42, mateo-jl wrote: Hello everybody, i got many errors about mod_jk but i don't know whether it's the good forum ... I have configured 4 tomcat identical servers reached by a front server apache through mod_jk. When I look at the jkstatus page, I can note a strange behaviour: only the same server (4) is under loaded. Regular percentages are: 1st:30% , 2nd:29%, 3rd:28, 4th:13% (note: lbfactor is the same for the 4 workers) What are therse percentages? I don't know which way I can scrutinize. I just can see a lot of errors within error.log: Error connecting to tomcat (not necessarily the 4th) or ajp_process_callback write failed. Not good. So, the question is, which are the first checkings at tomcat configuration I can do ? Read about timeouts: http://tomcat.apache.org/connectors-doc/generic_howto/timeouts.html All attributes are listed on http://tomcat.apache.org/connectors-doc/reference/workers.html Do you have an how to for interpreting jkstatus ? Not really. What about jkstatus do you want to interprete? There's a bit of information on http://tomcat.apache.org/connectors-doc/reference/status.html or is there any other way, a kind of pure tomcat tool, to check the tomcat perfs. Regards, Rainer - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: jkstatus - Error connecting to tomcat - ajp_process_callback write failed
From: mateo-jl [mailto:mateo...@orange.fr] Subject: Re: jkstatus - Error connecting to tomcat - ajp_process_callback write failed Does these workers options are valid with mod_jk2 (mod_jk2-2.0.43.dll) Nothing is valid with mod_jk2 - it has been deprecated and completely unsupported for several years. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
Re: jkstatus - Error connecting to tomcat - ajp_process_callback write failed
On 08.09.2009 14:40, mateo-jl wrote: Does these workers options are valid with mod_jk2 (mod_jk2-2.0.43.dll) ? (http://tomcat.apache.org/connectors-doc/reference/workers.html) No, mod_jk2 is deprecated since many years. mod_jk is well maintained and the preferred way to go. Do you think that the following message are relative to timeouts issues ? Error connecting to tomcat (not necessarily the 4th) or ajp_process_callback write failed. Not directly, they are what they say, namely errors when establishing a new TCP connection to the Tomcat AJP connector. Timeouts help in making the system generally more stable. Regards, Rainer Message du 07/09/09 11:43 De : Rainer Jung A : Tomcat Users List Copie à : Objet : Re: jkstatus - Error connecting to tomcat - ajp_process_callback write failed On 04.09.2009 11:42, mateo-jl wrote: Hello everybody, i got many errors about mod_jk but i don't know whether it's the good forum ... I have configured 4 tomcat identical servers reached by a front server apache through mod_jk. When I look at the jkstatus page, I can note a strange behaviour: only the same server (4) is under loaded. Regular percentages are: 1st:30% , 2nd:29%, 3rd:28, 4th:13% (note: lbfactor is the same for the 4 workers) What are therse percentages? I don't know which way I can scrutinize. I just can see a lot of errors within error.log: Error connecting to tomcat (not necessarily the 4th) or ajp_process_callback write failed. Not good. So, the question is, which are the first checkings at tomcat configuration I can do ? Read about timeouts: http://tomcat.apache.org/connectors-doc/generic_howto/timeouts.html All attributes are listed on http://tomcat.apache.org/connectors-doc/reference/workers.html Do you have an how to for interpreting jkstatus ? Not really. What about jkstatus do you want to interprete? There's a bit of information on http://tomcat.apache.org/connectors-doc/reference/status.html or is there any other way, a kind of pure tomcat tool, to check the tomcat perfs. Regards, Rainer - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: jkstatus - Error connecting to tomcat - ajp_process_callback write failed
On 04.09.2009 11:42, mateo-jl wrote: Hello everybody, i got many errors about mod_jk but i don't know whether it's the good forum ... I have configured 4 tomcat identical servers reached by a front server apache through mod_jk. When I look at the jkstatus page, I can note a strange behaviour: only the same server (4) is under loaded. Regular percentages are: 1st:30% , 2nd:29%, 3rd:28, 4th:13% (note: lbfactor is the same for the 4 workers) What are therse percentages? I don't know which way I can scrutinize. I just can see a lot of errors within error.log: Error connecting to tomcat (not necessarily the 4th) or ajp_process_callback write failed. Not good. So, the question is, which are the first checkings at tomcat configuration I can do ? Read about timeouts: http://tomcat.apache.org/connectors-doc/generic_howto/timeouts.html All attributes are listed on http://tomcat.apache.org/connectors-doc/reference/workers.html Do you have an how to for interpreting jkstatus ? Not really. What about jkstatus do you want to interprete? There's a bit of information on http://tomcat.apache.org/connectors-doc/reference/status.html or is there any other way, a kind of pure tomcat tool, to check the tomcat perfs. Regards, Rainer - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
