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How to limit the number of requests routed to Tomcat via Apache V2.4.3

+3 votes
428 views

I have a requirement where the tomcat load has to be managed by tuning the following parameters.

--> Limit the number of user requests at Apache level that are routed to Tomcat server.
--> Track the number of processed requests and the requests that are queued at Apache level.

Any suggestions?

posted Jan 8, 2014 by Amit Mishra

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+1 vote

We have a set up like Apahce (80,443) redirects the request to Tomcat (8080) using mod_jk.

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Now the issue is when I hit the url http://:86 and after providing the credentials, it is redirecting to https://:86 and throwing the below error.

Error in browser:

Secure Connection Failed

An error occurred during a connection to x.x.x.x:86. SSL received a record that exceeded the maximum permissible length. (Error code: ssl_error_rx_record_too_long)

Error in logs:

"x16x03x01" 501

[Thu Jan 08 08:22:46 2015] [debug] ssl_engine_io.c(1523): OpenSSL: I/O error, 11 bytes expected to read on BIO#1bf568 [mem: 1f3930]
[Thu Jan 08 08:22:46 2015] [debug] ssl_engine_kernel.c(1806): OpenSSL: Exit: error in SSLv2/v3 read client hello A
[Thu Jan 08 08:22:46 2015] [info] (70014)End of file found: SSL handshake interrupted by system [Hint: Stop button pressed in browser?!]
[Thu Jan 08 08:22:46 2015] [info] Connection to child 3 closed with abortive shutdown(server pritoolvca1.sw.ericsson.se:443 [2], client 153.88.164.216)
[Thu Jan 08 08:23:53 2015] [error] [client 172.17.136.153] Invalid method in request x16x03x01

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+3 votes

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+2 votes

I have a domain domain.com that points to a server. Now I have a subdomain sub.domain.com that points to another server that has Apache running and Tomcat. I want this subdomain to point to a application deployed on the Tomcat instance through ajp.

I have configured the following in httpd.conf:

   ServerName sub.domain.com 
   ProxyRequests Off
   ProxyPreserveHost On  
   Order deny,allow Allow from all  
   ProxyPass / ajp://localhost:8009/ 
   ProxyPassReverse / ajp://localhost:8009/   

and in Tomcats server.xml:

But when I go to sub.domain.com the url changes to otherdomain.com and shows me a php website running in Apache and declared as following in httpd.conf:

 DocumentRoot /var/www/html/otherdomain.com 
 ServerName otherdomain.com 
 ServerAlias www.otherdomain.com 

I only get it to work when I change the port in the sub.domain.com virtual host declaration to for example 8001. Then when I go to sub.domain.com:8001 it shows my tomcat application (ROOT.war) as expected.

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+1 vote

I am using tomcat 7.0.42 and deployed in CentOs . When i start the server i am geting below log in my console .....

Aug 31, 2013 10:37:59 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path:
/xtd/ser/installation/jdk1.7.0_25/jre/lib/amd64/server:/xtd/ser/installation/jdk1.7.0_25/jre/lib/amd64:/xtd/ser/installation/jdk1.7.0_25/jre/../lib/amd64:/usr/java/jdk1.6.0_45/jre/lib/amd64/server:/usr/java/jdk1.6.0_45/jre/lib/amd64:/usr/java/jdk1.6.0_45/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
Aug 31, 2013 10:37:59 PM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-bio-8080"]
Aug 31, 2013 10:37:59 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Aug 31, 2013 10:37:59 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 730 ms
Aug 31, 2013 10:37:59 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Aug 31, 2013 10:37:59 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.42
Aug 31, 2013 10:38:00 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Aug 31, 2013 10:38:00 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Aug 31, 2013 10:38:00 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 370 ms

BUT WHEN I AM OPEING THE BROWSER i am getting Unable to connect. I am not sure my server is started or not ? Please suggest what could be the problem?

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