Configuring Tomcat with Apache for load balancing

[Parthiban Malayandi]

Hi all,

First of all I'm not sure I'm posting in a correct forum.If not sorry for that .

I have configured Apache Http Server with two Tomcat instance for load balancing. I did that to learn about HttpSessionActivationListener

The problem is the Tomcat is serving Static HTML pages but it couldn't able to serve Servlet or JSP page.

I have a web application named "Chapter6" .

Following are the configuration entries in Apache Http server
======================================

JkMount /Chapter6 balancer
JkMount /Chapter6/* balancer

Following is the worker.properties
======================================

workers.tomcat_home=D:/Tomcat/apache-tomcat-5.5.26

workers.java_home=D:/Java/jdk1.6.0_16

#worker.list=worker1,worker2
worker.list=balancer

worker.worker1.port=8009
worker.worker1.host=localhost
worker.worker1.type=ajp13
worker.worker1.lbfactor=1

worker.worker2.port=8019
worker.worker2.host=localhost
worker.worker2.type=ajp13
worker.worker2.lbfactor=1

worker.balancer.type=lb
worker.balancer.balance_workers=worker1,worker2
worker.balancer.method=B

Following is the exception I'm getting when I invoke JSP page
======================================

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: D:\Tomcat\apache-tomcat-5.5.26\webapps\Chapter6\WEB-INF\web.xml (Access is denied)
	org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:185)
	org.apache.jasper.compiler.JspConfig.init(JspConfig.java:198)
	org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:250)
	org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:113)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:296)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:265)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:302)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

java.io.FileNotFoundException: D:\Tomcat\apache-tomcat-5.5.26\webapps\Chapter6\WEB-INF\web.xml (Access is denied)
	java.io.FileInputStream.open(Native Method)
	java.io.FileInputStream.<init>(FileInputStream.java:106)
	org.apache.naming.resources.FileDirContext$FileResource.streamContent(FileDirContext.java:975)
	org.apache.naming.resources.DirContextURLConnection.getInputStream(DirContextURLConnection.java:307)
	java.net.URL.openStream(URL.java:1010)
	org.apache.jasper.compiler.JspConfig.processWebDotXml(JspConfig.java:72)
	org.apache.jasper.compiler.JspConfig.init(JspConfig.java:198)
	org.apache.jasper.compiler.JspConfig.findJspProperty(JspConfig.java:250)
	org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:113)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:296)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:265)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:302)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.26 logs.

Please tell me is any other thing that I need to configure to get dynamically generating pages like JSPs

Thanks in advance

[Ulf Dittmer]

Does the account that runs Tomcat have access to the file in question?

[Parthiban Malayandi]

Hi Ulf,

Thanks for your reply. Can you tell me how do I check that ?

[Ulf Dittmer]

Check the permission on that file, and compare it to the permissions of whatever account the Tomcat instance runs under.

[Parthiban Malayandi]

Hi Ulf,

I found where is the problem . Actually I download Tomcat in zip format and used it. Later I created it as service in Windows (using 'sevice install' command ) to configure it to Apache Http Server.

When I use this as service with Apache Http server it's not serving the dynamic things(servlets and JSP) but If I start it as standalone Tomcat using batch file(startup.bat) It's works well.

I even tried logged as administrator but it didn't help .

I guess I need to add some permission to the service which I created for Tomcat.

Can you tell me how to add permissions for the Tomcat instance service in Windows ?