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From Mark Eggers <its_toas...@yahoo.com.INVALID>
Subject Re: Connectivity Issue with Tomcat7 and WebServer (AJP Connector)
Date Mon, 08 Aug 2016 15:48:31 GMT
Jayaram,

Please don't top post (http://tomcat.apache.org/lists.html#tomcat-users
item 6).

On 8/8/2016 2:18 AM, Jayaram Ponnusamy wrote:
> Thanks André,
> 
> 1. ANS-Question 1 = Both Tomcat & WebServer installed on different 
> Machines, Attached Architecture diagram of our environment. Our
> Tomcat are configured as Application Clustering, and WebServer1 is
> pointing to Tomcat1 and WebServer2 is pointing to Tomcat2 Tomcat's IP
> (Node1): 10.100.0.31 WebServer's IP (Node1): 10.100.15.21
> 
> Tomcat's IP (Node2): 10.100.0.32 WebServer's IP (Node2):
> 10.100.15.22
> 
> 2. ANS-Question 2 = Thanks, Thats fine :)
> 
> 3. ANS-Question 3 = Attached Architecture diagram for your
> reference.

Attachments are stripped by the list software. Please do an inline ASCII
diagram.

Also, in your diagram, please show the location of all involved firewalls.

. . . just my two cents
/mde/

> Thanks Jayaram
> 
> On Mon, Aug 8, 2016 at 11:20 AM, André Warnier (tomcat)
> <aw@ice-sa.com> wrote:
> 
>> On 08.08.2016 09:14, Jayaram Ponnusamy wrote:
>> 
>>> Thanks for your Quick & Valuable Response,
>>> 
>>> 1. ANS-Question 1: No Both Are different Machine, We are using
>>> VirtualHost configuration
>>> 
>> 
>> That is not consistent with the configuration that you sent. You
>> have a ServerName (in Apache) named as "ServerName 10.100.0.31"
>> (which is not a proof, but a suggestion that the IP of this machine
>> is 10.100.0.31). And you have this line in workers.properties : 
>> worker.prod_live_svr.host=10.100.0.31 which suggest that Tomcat
>> answers to the same address. So why are you saying "different
>> machine" ?
>> 
>> 2. ANS-Question 2: Kindly please share Optimal Value to Set for
>>> ConnectionTimeout & KeepAliveTimeout if required
>>> 
>> 
>> One again, there is no "optimal" value for all cases. But the
>> default values should cover most of the usual cases. The default
>> values are the ones that are active if you do not specify the 
>> parameter at all.  So just remove these parameters, and you should
>> be ok. If there is a problem such as you mention below, it is NOT
>> because of the default value of these parameters.
>> 
>> 3. ANS-Question 3: Yes We have Firewall, but there is no rules. I
>> just
>>> googled and updated this value to tuning server. Now I removed
>>> 
>> 
>> Can you draw a simple schema of your configuration ? (ASCII-art) 
>> Showing clearly : - where is the workstation - where is Apache
>> httpd - where is the firewall - where is Tomcat
>> 
>> We do not have access to your server, so it is more complicated
>> for helping you, unless you provide us with precise information.
>> 
>> 
>> 4. ANS-Question 4: I am new to Apache, While searching in Google,
>> Based on
>>> some recommandationI tried. I removed all these items.
>>> 
>>> 
>> Good.
>> 
>> Now I am monitoring systems, whether still its closing connections
>> or not.
>>> 
>>> sir, While directly using Tomcat URL, pages are loading 1-2
>>> Seconds, but the same page taking 6-7 Seconds in WebServer URL. 
>>> Also, If I didn't use WebServer URL for 30minutes and hit any
>>> URL, first time its taking more than 30 Seconds to load a page.
>>> 
>>> Is there any option to tuning the system.
>>> 
>>> 
>> See item 3 above. Clearly, you have a problem.  But without knowing
>> your exact configuration, we can only guess.  Clearly also, it is
>> not a problem of Tomcat per se. To me, with the little information
>> available so far, it sounds like it could be a problem with DNS or
>> routing, but that's just a wild guess so far.
>> 
>> 
>> 
>> 
>>> On Mon, Aug 8, 2016 at 12:53 AM, André Warnier (tomcat)
>>> <aw@ice-sa.com> wrote:
>>> 
>>> On 07.08.2016 11:08, Jayaram Ponnusamy wrote:
>>>> 
>>>> Hi,
>>>>> We are using Tomcat 7.0.42.0, AJP/1.3 with Apache 2.2.21. 
>>>>> Connecting Apache to Tomcat as VirtualHost, The Problem is
>>>>> Apache and Tomcat losing its connection every 20-30 Minutes.
>>>>> Either We have to hit the WebServer URL multiple times or
>>>>> Reboot Apache & Tomcat to resolve the issue for short-time. 
>>>>> Also accessing WebServer URL is very very slow than tomcat
>>>>> URL (Mostly it takes 30-45seconds to load a Page).
>>>>> 
>>>>> I have added tomcat/Apache configurations below, Kindly
>>>>> please help me to resolve this issue.
>>>>> 
>>>>> 
>>>>> Tomcat (Server.xml): <Connector port="9090"
>>>>> 
>>>>> protocol="HTTP/1.1"
>>>> 
>>>> connectionTimeout="600000"
>>>>> redirectPort="8443" URIEncoding="UTF-8"
>>>>> emptySessionPath="true"/>
>>>>> 
>>>>> 
>>>> <Connector port="9009" protocol="AJP/1.3" redirectPort="8443"
>>>> 
>>>>> URIEncoding="UTF-8" connectionTimeout="600000"/>  <------
>>>>> (*)
>>>>> 
>>>>> 
>>>>> Apache (Workers.properties): worker.list=prod_live_svr 
>>>>> worker.prod_live_svr.type=ajp13
>>>>> 
>>>>> worker.prod_live_svr.host=10.100.0.31 
>>>>> worker.prod_live_svr.port=9009 
>>>>> worker.prod_live_svr.lbfactor=50 
>>>>> worker.prod_live_svr.socket_keepalive=1
>>>>> 
>>>>> worker.prod_live_svr.connection_pool_size=100 
>>>>> worker.prod_live_svr.connection_pool_minsize=50 
>>>>> worker.prod_live_svr.connection_pool_timeout=500
>>>>> 
>>>>> 
>>>>> VirtualHost.conf: <VirtualHost *:80>
>>>>> 
>>>>> ServerName 10.100.0.31
>>>>> 
>>>>> 
>>>>> ErrorLog logs/live/http_error.log RewriteLog
>>>>> logs/live/http_rewrite.log
>>>>> 
>>>>> RewriteEngine on RewriteCond %{REMOTE_ADDR}
>>>>> !^10\.100\.0\.31$ RewriteRule ^/+$ /sites/  [R,L]
>>>>> 
>>>>> <IfModule rewrite_module> Options +FollowSymlinks 
>>>>> RewriteEngine On
>>>>> 
>>>>> RewriteOptions Inherit RewriteLog logs/rewrite.log
>>>>> 
>>>>> </IfModule> JkMount   /*        prod_live_svr
>>>>> 
>>>>> JkOptions +ForwardURICompatUnparsed
>>>>> 
>>>>> </VirtualHost>
>>>>> 
>>>>> 
>>>>> 
>>>>> 1) Question : are Apache httpd and Tomcat on the same machine
>>>>> ?
>>>> 
>>>> And if yes, why do you not set
>>>> 
>>>> worker.prod_live_svr.host=127.0.0.1
>>>> 
>>>>> 
>>>>> 
>>>> 2) why : connectionTimeout="600000"  (*) That is 5 minutes. By
>>>> default, "keepAliveTimeout" is also that same value. It means
>>>> that after a request is processed (and finished) on one
>>>> instance of a Connector, this Connector will remain "stuck" on
>>>> the same connection for another 5 minutes, before it gives up
>>>> and closes it.  That is kind of wasteful.
>>>> 
>>>> 3) Why this : worker.prod_live_svr.socket_keepalive=1 Do you
>>>> have a firewall between Apache httpd and Tomcat ?
>>>> 
>>>> 4) Why these ?
>>>> 
>>>> worker.prod_live_svr.connection_pool_size=100
>>>>> worker.prod_live_svr.connection_pool_minsize=50 
>>>>> worker.prod_live_svr.connection_pool_timeout=500
>>>>> 
>>>>> 
>>>> See :
>>>> http://tomcat.apache.org/connectors-doc/reference/workers.html 
>>>> --> connection_pool_size --> connection_pool_minsize -->
>>>> connection_pool_timeout  (see also (*) above)
>>>> 
>>>> In general (and particularly since you do not seem to be an
>>>> expert in this kind of configuration), you should not set
>>>> parameters when you do not understand exactly what they are
>>>> doing. The default configurations of Apache httpd, Tomcat and
>>>> AJP are set by experts (who know what they are doing), to
>>>> values which fit a wide range of realistic use cases.
>>>> 
>>>> I would suggest to rewrite your configuration as follows :
>>>> 
>>>> I) Tomcat server.xml :
>>>> 
>>>> <Connector port="9009" protocol="AJP/1.3" redirectPort="8443" 
>>>> URIEncoding="UTF-8">
>>>> 
>>>> II) Apache httpd, workers.properties :
>>>> 
>>>> worker.list=prod_live_svr
>>>> 
>>>> worker.prod_live_svr.type=ajp13 
>>>> worker.prod_live_svr.host=127.0.0.1 
>>>> worker.prod_live_svr.port=9009
>>>> 
>>>> -----------------
>>>> 
>>>> That's it, no other parameters.
>>>> 
>>>> The Apache-side mod_jk connector module will by default and
>>>> reasonably set the connection pool size, keepalive and timeout
>>>> values etc.



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