Re: How to forward external-ip-facing requests from ApacheHTTPServer to Tomcat?
Hi, Thank you for the suggestion :) I will give it a shot but I am really too deep into my setup to be doing any big changes or something new! So while I try to google and learn more about setting up mod_proxy, I would really appreciate if someone can tell me: How do I go about configuring apache to forward the outside-facing-ip requests to Tomcat through JK connector? This should be something pretty standard for anyone who has ever moved Tomcat from a local testing env. (localhost) to a production env. (real ip) ...right? Thanks, - Pulkit On 12/23/05, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: use mod_proxy, much easier, and in our tests has proven to scale better, and you will wanna look for a directive called ProxyHostPreserve so that request.getServerName returns the right name, then the IP address will be stored in x-forwarded-for header in the HTTP request. Filip Hello Everyone, I have successfully configured Apache to forward requests to my Tomcat instance. But it does so...only for requests whose IP resolves to 127.0.0.1 If I try to access a page through apache server (that's actually on tomcat) with the outside-facing-ip of my computer it fails. For example: 1) URL: http://12.34.56.78:666/blah/serveMe.html;FAILS with a 404 (apache does not forward properly) 2) URL: http://12.34.56.78:8080/blah/serveMe.html; SUCCEEDS (tomcat seems to be ok when it gets the request directly, so it has to be a forwarding failure by apache in the previous case) 3) URL: http://my.domain.com:666/blah/serveMe.html; SUCCEEDS (I have my.domain.com mapped to 127.0.0.1 in my windows' hosts file) 4) URL: http://localhost:666/blah/serveMe.html;SUCCEEDS I think this happens because the 1st request (the one with the outside facing ip) is not forwarded to Tomcat by apache. a) The apache error logs show that Apache is trying to look for the page in the wrong place b) The access logs ofcourse show a 404 because it can't find the page to serve Now, I have read a few threads and been on a few forums and apparently my worker.properties file is supposed to be as simple as this: worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=my.domain.com worker.ajp13.type=ajp13 --- I also tried putting my outside-facing-ip and localhost as values for worker.ajp13.host but it didn't seem to make any difference at all. In that case I must ask all of you: Question 1: How do I go about configuring apache to forward the outside-facing-ip requests to Tomcat? If it is not done in workers.properties...then where is it handled? Question 2: Or am I wrong and it is actually handled by workers.properties? Even then, how? Thanks in advance to all those who answer and all those who take the time to read this. Cheers, - Pulkit - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to forward external-ip-facing requests from ApacheHTTPServer to Tomcat?
Hi Daniel, Firstly, Thank you for your response. Secondly, I must confess that I failed to grasp some of it due to my ignorance of Unix. I understood the overall idea but found myself scared/hesitant in implementing it as I'm using Win Server 2003. I'm a bit perplexed by the contents you said I could add to workers2.properties as I was not aware that fields were acceptable in such format. May be its the type of connector you are using or maybe its just my lack of experience/knowledge. I did find a soulution of ***sorts** which I would like to share with all of you so that you may comment/bash on its weaknesses/lamenesses thus helping me in finding a better one: *sigh* I just: a) Removed the 127.0.0.1my.server.com mapping from the hosts file. b) Added another Virtual Host to my server.xml file...resulting in something like this: !-- Define the default virtual host -- Host name=localhost ... Listener className=org.apache.jk.config.ApacheConfig modJk=c:/apps/apache/apache2/modules/mod_jk- apache-2.0.55.so / /Host !-- Define the hack virtual host for external-facing-ip requests Host name=my.server.com ... Listener className=org.apache.jk.config.ApacheConfig modJk=c:/apps/apache/apache2/modules/mod_jk- apache-2.0.55.so / /Host c) This happened to do the job, as now the file that Tomcat was auto-generating for use by Apache had some lines that accounted for the proper forwarding of external-facing-ip requests as well :) These were not there earlier and the file I speak of is tomcat_home\conf\auto\mod_jk.conf ) d) I still feel a bit jilted because my solution seems repetitive...there are 2 virtual hosts that are located in the exact same place and to top it off they have the same listeners inside them. They are identical in every aspect. I HAD tried entering Aliasmy.server.com/Alias under the localhost virtual-host but that did not seem to do the job... so I settled for having this repitition. Do let me know of your thoughts on this... Cheers, - Pulkit On 12/25/05, Daniel Blumenthal [EMAIL PROTECTED] wrote: I've set up my system so that Apache handles all requests, and forwards to the servlet when the path is www.mysite.com/myservlet/*. Following are my installation notes. (note that there's a slightly newer version of the JK connector) % tar zxf jakarta-tomcat-connectors-jk2-src-current.tar.gz % cd jakarta-tomcat-connectors-jk2-2.0.2-src/jk/native2 % ./configure --with-apxs2=/usr/local/apache/bin/apxs % make % su % cp ../build/jk2/apache2/mod_jk2.so /usr/local/apache/modules % cp ../build/jk2/apache2/jkjni.so /usr/local/apache/modules make sure that httpd owns the apache directory tomcat/server.xml: make sure that the following connector is uncommented: Connector className=org.apache.ajp.tomcat4.Ajp13Connector port=8009 minProcessors=5 maxProcessors=75 acceptCount=10 debug=0/ create a workers2.properties file in /usr/local/apache/conf with the following contents: [logger] level=DEBUG [shm] file=/usr/local/apache/logs/jk2.shm size=1048576 [channel.socket:localhost:8009] info=Ajp13 forwarding over socket tomcatId=localhost:8009 [uri:/myservlet/*] context=/myservlet % touch /usr/local/apache/logs/jk2.shm % chown httpd /usr/local/apache/logs/jk2.shm % chgrp httpd /usr/local/apache/logs/jk2.shm add the following line to /usr/local/apache/conf/httpd.conf: LoadModule jk2_module modules/mod_jk2.so I hope this helps. Daniel -Original Message- From: Pulkit Singhal [mailto:[EMAIL PROTECTED] Sent: Sunday, December 25, 2005 1:12 PM To: Tomcat Users List Subject: Re: How to forward external-ip-facing requests from ApacheHTTPServer to Tomcat? Hi, Thank you for the suggestion :) I will give it a shot but I am really too deep into my setup to be doing any big changes or something new! So while I try to google and learn more about setting up mod_proxy, I would really appreciate if someone can tell me: How do I go about configuring apache to forward the outside-facing-ip requests to Tomcat through JK connector? This should be something pretty standard for anyone who has ever moved Tomcat from a local testing env. (localhost) to a production env. (real ip) ...right? Thanks, - Pulkit On 12/23/05, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: use mod_proxy, much easier, and in our tests has proven to scale better, and you will wanna look for a directive called ProxyHostPreserve so that request.getServerName returns the right name, then the IP address will be stored in x-forwarded-for header in the HTTP request. Filip Hello Everyone, I have successfully configured Apache to forward requests to my Tomcat instance. But it does so...only for requests whose IP resolves to 127.0.0.1
About Tomcat Connector
Hello:
I use Tomcat Connector to forward servlet requests from IIs6 to tomcat5, my
config like this:
file workers.properties.minimal
worker.list=wlb
worker.wlb.host=localhost
worker.wlb.port=8009
worker.wlb.type=ajp13
worker.wlb.socket_keepalive=1
worker.wlb.socket_timeout=36000
file uriworkermap.properties
/jsp-examples/*=wlb
/servlets-examples/*=wlb
It works fine;
Now I want a persistence connection to servlet,the servlet like this:
public class connServlet extends HttpServlet
{
bool doconnect=false;
private void connect(HttpServletRequest req, HttpServletResponse res)throws
IOException, ServletException
{
try {
..
while (doconnect==true )
{ try { Thread.sleep(1L); }
catch (InterruptedException i) { break; }
}
}
catch (Exception e){ System.out.println( e.toString()); }
}
public void doPost(HttpServletRequest req, HttpServletResponse res) throws
ServletException, IOException {
String actionType =req.getHeader(ActionType);
if (actionType.equalsIgnoreCase(connect) doconnect==false )
{ doconnect=true; connect(req,res);return; }
if (actionType.equalsIgnoreCase(disconnect) )
{ doconnect=false; return; }
.
}
}
It can work in tomcat5,but It can not work with Tomcat Connector in IIs6,
if Tomcat Connector can not do this or the config file is wrong?
thanks!
peng
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About Tomcat Connector
__赶快注册雅虎超大容量免费邮箱?http://cn.mail.yahoo.com---BeginMessage---
Hello:
I use Tomcat Connector to forward servlet requests from IIs6 to tomcat5, my
config like this:
file workers.properties.minimal
worker.list=wlb
worker.wlb.host=localhost
worker.wlb.port=8009
worker.wlb.type=ajp13
worker.wlb.socket_keepalive=1
worker.wlb.socket_timeout=36000
file uriworkermap.properties
/jsp-examples/*=wlb
/servlets-examples/*=wlb
It works fine;
Now I want a persistence connection to servlet,the servlet like this:
public class connServlet extends HttpServlet
{
bool doconnect=false;
private void connect(HttpServletRequest req, HttpServletResponse res)throws
IOException, ServletException
{
try {
..
while (doconnect==true )
{ try { Thread.sleep(1L); }
catch (InterruptedException i) { break; }
}
}
catch (Exception e){ System.out.println( e.toString()); }
}
public void doPost(HttpServletRequest req, HttpServletResponse res) throws
ServletException, IOException {
String actionType =req.getHeader(ActionType);
if (actionType.equalsIgnoreCase(connect) doconnect==false )
{ doconnect=true; connect(req,res);return; }
if (actionType.equalsIgnoreCase(disconnect) )
{ doconnect=false; return; }
.
}
}
It can work in tomcat5,but It can not work with Tomcat Connector in IIs6,
if Tomcat Connector can not do this or the config file is wrong?
thanks!
peng
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about Tomcat Connector
Hello:
I use Tomcat Connector to forward servlet requests from IIs6 to
tomcat5, my config like this:
file workers.properties.minimal
worker.list=wlb
worker.wlb.host=localhost
worker.wlb.port=8009
worker.wlb.type=ajp13
worker.wlb.socket_keepalive=1
worker.wlb.socket_timeout=36000
file uriworkermap.properties
/jsp-examples/*=wlb
/servlets-examples/*=wlb
It works fine;
Now I want a persistence connection to servlet,the servlet like this:
public class connServlet extends HttpServlet
{
bool doconnect=false;
private void connect(HttpServletRequest req, HttpServletResponse
res)throws IOException, ServletException
{
try {
..
while (doconnect==true )
{ try { Thread.sleep(1L); }
catch (InterruptedException i) { break; }
}
}
catch (Exception e){ System.out.println( e.toString());
}
}
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
String actionType =req.getHeader(ActionType);
if (actionType.equalsIgnoreCase(connect) doconnect==false )
{ doconnect=true; connect(req,res);return; }
if (actionType.equalsIgnoreCase(disconnect) )
{ doconnect=false; return; }
.
}
}
It can work in tomcat5,but It can not work with Tomcat Connector in
IIs6,
if Tomcat Connector can not do this or the config file is wrong?
thanks!
peng
-
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Re: IllegalAccessException expected all the time, but only occurs sometimes. Why?
I found this on the web that seems to explain why the problem is
occurring...
http://opensource2.atlassian.com/projects/spring/browse/SPR-1518
Sean Dockery [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
I have a TestCase as follows...
package example;
import java.util.Date;
import junit.framework.TestCase;
public class JavaBeanTest extends TestCase {
public JavaBeanTest(String testName) {
super(testName);
}
public void testThrowawayCopy() throws Exception {
// setup
final JavaBean bean = new JavaBean();
bean.setId(1L);
bean.setName(hello);
// exercise
final JavaBean copy = bean.throwawayCopy();
bean.setExpired(new Date());
copy.setId(2L);
copy.setName(world);
// verify
assertEquals(id affected by copy.setId(long) call, 2L, bean.getId());
assertEquals(name not affected by copy.setName(String) call, hello,
bean.getName());
assertNotNull(expired has changed, bean.getExpired());
assertEquals(id has changed, 2L, copy.getId());
assertEquals(name has changed, world, copy.getName());
assertNull(expired not affected by bean.setExpired(Date) call,
copy.getExpired());
}
public static Test suite() {
TestSuite suite = new TestSuite();
Test test = new JavaBeanTest(testThrowawayCopy);
for (int i = 0; i 1000; i++) {
suite.addTest(test);
}
return suite;
}
}
...for which I have a JavaBean class as follows...
package example;
import java.lang.reflect.Method;
import java.util.Date;
public class JavaBean {
private long id;
private String name;
private Date expired;
public JavaBean() {
// default constructor for JavaBean
}
public Date getExpired() {
return expired;
}
public void setExpired(Date expired) {
this.expired = expired;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public JavaBean throwawayCopy() {
return new ThrowawayJavaBean();
}
private final class ThrowawayJavaBean extends JavaBean {
private boolean propagateId;
private ThrowawayJavaBean() {
copyProperties();
propagateId = true;
}
private void copyProperties() {
try {
Method[] methods = JavaBean.this.getClass().getDeclaredMethods();
for (int i = 0; i methods.length; i++) {
final Method source = methods[i];
if (source.getName().startsWith(get)) {
Method target = getClass().getMethod(set +
source.getName().substring(3), new Class[] { source.getReturnType() });
target.invoke(this, new Object[] { source.invoke(JavaBean.this, new
Object[] {}) });
}
}
} catch (Exception e) {
throw unchecked(e);
}
}
public void setId(long id) {
super.setId(id);
if (propagateId) {
JavaBean.this.setId(id);
}
}
private RuntimeException unchecked(Exception e) {
if (e instanceof RuntimeException) {
return (RuntimeException) e;
}
return new RuntimeException(e);
}
}
}
This code has been adapted from some code in a production application at
my
work. The production code actually uses Spring's
BeanUtils.copyProperties(Object source, Object target) method in the
ThrowawayJavaBean constructor, but we should be accomplishing the same
thing
by using reflection directly.
As you can see, the ThrowawayJavaBean class is a *private* nested class.
During load tests of the production application, the production code
(running in Tomcat) *sometimes* experiences an IllegalAccessException due
to
the fact that we're using reflection against a private nested class. The
problem has never occurred when the visibility of the nested class is
public. Additionally, I have *never* seen the exception occur in the
JUnit
TestRunner with neither the code I have presented above, nor the
production
code itself.
My confusion lies with the question of why the IllegalAccessException
occurs
only infrequently in the production code running under Tomcat instead of
always occurring. That is, why doesn't (wouldn't) it happen all the
time--for example, in my TestCase?
Thanks for your time.
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RE: How to forward external-ip-facing requests from ApacheHTTPServer to Tomcat?
Pulkit, I don't have any experience with WinServer (strictly a Linux man), but if it works... Also, it was my understanding (last time I checked) that no one's maintaining the old jk connector code - possibly because your method is now the recommended way? I don't know. Good luck! Daniel -Original Message- From: Pulkit Singhal [mailto:[EMAIL PROTECTED] Sent: Sunday, December 25, 2005 6:29 PM To: Tomcat Users List; [EMAIL PROTECTED] Subject: Re: How to forward external-ip-facing requests from ApacheHTTPServer to Tomcat? Hi Daniel, Firstly, Thank you for your response. Secondly, I must confess that I failed to grasp some of it due to my ignorance of Unix. I understood the overall idea but found myself scared/hesitant in implementing it as I'm using Win Server 2003. I'm a bit perplexed by the contents you said I could add to workers2.properties as I was not aware that fields were acceptable in such format. May be its the type of connector you are using or maybe its just my lack of experience/knowledge. I did find a soulution of ***sorts** which I would like to share with all of you so that you may comment/bash on its weaknesses/lamenesses thus helping me in finding a better one: *sigh* I just: a) Removed the 127.0.0.1my.server.com mapping from the hosts file. b) Added another Virtual Host to my server.xml file...resulting in something like this: !-- Define the default virtual host -- Host name=localhost ... Listener className=org.apache.jk.config.ApacheConfig modJk=c:/apps/apache/apache2/modules/mod_jk- apache-2.0.55.so / /Host !-- Define the hack virtual host for external-facing-ip requests Host name=my.server.com ... Listener className=org.apache.jk.config.ApacheConfig modJk=c:/apps/apache/apache2/modules/mod_jk- apache-2.0.55.so / /Host c) This happened to do the job, as now the file that Tomcat was auto-generating for use by Apache had some lines that accounted for the proper forwarding of external-facing-ip requests as well :) These were not there earlier and the file I speak of is tomcat_home\conf\auto\mod_jk.conf ) d) I still feel a bit jilted because my solution seems repetitive...there are 2 virtual hosts that are located in the exact same place and to top it off they have the same listeners inside them. They are identical in every aspect. I HAD tried entering Aliasmy.server.com/Alias under the localhost virtual-host but that did not seem to do the job... so I settled for having this repitition. Do let me know of your thoughts on this... Cheers, - Pulkit On 12/25/05, Daniel Blumenthal [EMAIL PROTECTED] wrote: I've set up my system so that Apache handles all requests, and forwards to the servlet when the path is www.mysite.com/myservlet/*. Following are my installation notes. (note that there's a slightly newer version of the JK connector) % tar zxf jakarta-tomcat-connectors-jk2-src-current.tar.gz % cd jakarta-tomcat-connectors-jk2-2.0.2-src/jk/native2 % ./configure --with-apxs2=/usr/local/apache/bin/apxs % make % su % cp ../build/jk2/apache2/mod_jk2.so /usr/local/apache/modules % cp ../build/jk2/apache2/jkjni.so /usr/local/apache/modules make sure that httpd owns the apache directory tomcat/server.xml: make sure that the following connector is uncommented: Connector className=org.apache.ajp.tomcat4.Ajp13Connector port=8009 minProcessors=5 maxProcessors=75 acceptCount=10 debug=0/ create a workers2.properties file in /usr/local/apache/conf with the following contents: [logger] level=DEBUG [shm] file=/usr/local/apache/logs/jk2.shm size=1048576 [channel.socket:localhost:8009] info=Ajp13 forwarding over socket tomcatId=localhost:8009 [uri:/myservlet/*] context=/myservlet % touch /usr/local/apache/logs/jk2.shm % chown httpd /usr/local/apache/logs/jk2.shm % chgrp httpd /usr/local/apache/logs/jk2.shm add the following line to /usr/local/apache/conf/httpd.conf: LoadModule jk2_module modules/mod_jk2.so I hope this helps. Daniel -Original Message- From: Pulkit Singhal [mailto:[EMAIL PROTECTED] Sent: Sunday, December 25, 2005 1:12 PM To: Tomcat Users List Subject: Re: How to forward external-ip-facing requests from ApacheHTTPServer to Tomcat? Hi, Thank you for the suggestion :) I will give it a shot but I am really too deep into my setup to be doing any big changes or something new! So while I try to google and learn more about setting up mod_proxy, I would really appreciate if someone can tell me: How do I go about configuring apache to forward the outside-facing-ip requests to Tomcat through JK connector? This should be
Re: How to load a class when tomcat starts
Here is some code that might help you:
import java.io.*;
import java.net.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class InitServlet extends HttpServlet {
public void init(ServletConfig config) throws ServletException {
super.init(config);
System.out.print(Loading classes in the JVM );
try{
Class.forName(com.m2.isr2.Database);
System.out.print(.);
Class.forName(com.m2.isr2.platform.ActiveDirectory);
System.out.print(.);
} catch (ClassNotFoundException e)
{
System.out.println(e);
e.printStackTrace(System.out);
}
System.out.println( Completed!);
}
Hope that helps you...
Anoop
On 12/15/05, vineesh kumar [EMAIL PROTECTED] wrote:
Dear anoop,
Wat i actually need is the same as u hav done, to load a config
file.
so i created a GetProperties class, which simlpy read a file and
initializes some static variables.
Then i tried to run the application but, the fields are still null.and
the application is not connecting to the database
can u just quote the code snippet u had used?
thanks in advance
vineesh
On 12/10/05, Anoop kumar V [EMAIL PROTECTED] wrote:
The way we have done is to load a servlet during startup (very easy to
do in
web.xml) and through this servlet use Class.forName(classname) to load
the
required classes into memory.
The reason we do this is to read a .properties file and store all the
name
value pairs in a hashmap to be retrieved by various classes at run time.
Hope that helps,
Anoop
On 12/10/05, Richard Mixon [EMAIL PROTECTED] wrote:
Vineesh,
You should probably use a ServletContextListener . It will give you
control
when the web application starts and when it ends, among otherevents.
It is
pretty well described in the servlet spec and is pretty simple.
HTH -Richard
-Original Message-
From: vineesh kumar [mailto:[EMAIL PROTECTED]
Sent: Saturday, December 10, 2005 12:22 AM
To: users@tomcat.apache.org
Subject: How to load a class when tomcat starts
Hi all,
I need to load a java class when tomcat starts, which will initializes
some
configuration files and so i can use the fields in the class throught
the
environment.How can i do this.?
Actually I am working on a distributed application, so the
configuration
files may change frequently but once the system is initialized it will
not
change until shut down.
regards
vineesh
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--
Thanks and best regards,
Anoop
--
Thanks and best regards,
Anoop
Re: About possible memory leak in Tomcat 5.x
I think this is a great finding - it will certainly help all those teams
faced with the Out of memory errors which curiously pops up oly after we
move the code to production..
I hope you will have the tomcat developers look into this by sending this to
tomcat-developers forum.
THanks,
Anoop
On 12/19/05, Andrievsky Dmaitry [EMAIL PROTECTED] wrote:
Hello users,
About a half a year ago I've found that my webapp works fine in
development environment, but leaks memory in production one.
I've searched through all the code, found a few minor errors, but it
didn't help.
(of course, tag pooling are disabled completely)
So then i've tried to use profiler, looking on alien classes.
(I've tried before too, but my attention was concentrated on my own
classes)
And then i've found lots of
org.apache.jasper.runtime.PageContextImpl
from which there were a lot of references to the objects, that i've
treated as dead.
All PageContextImpl's lived at
org.apache.jasper.runtime.JspFactoryImpl.pool
There are property of org.apache.jasper.runtime.JspFactoryImpl, named
USE_POOL, which rules pool usage, but it is private,
and i've not found any way to set it to false from outside.
Initially it's true.
So, i've set it to false directly in code,
rebuilt tomcat and replaced files ${CATALINA_HOME}/common/lib/jasper-*.jar
from production environment with fresh ones.
So, it seems that the problem is successfully solved.
As far as I can see there no more memory leakage.
I think it would be useful to allow users to set property of
org.apache.jasper.runtime.JspFactoryImpl.USE_POOL from config files or
in any other way, without rebuilding entire tomcat application.
P.S.
In fact, I think, it's not REAL memory leak - memory usage, may be,
will stop grow on some large value (2+ GB, when pool become full), but i
have not such
amount of memory.
Now memory usage about 100-200 mb after full gc, depending on amount
of currently working users.
P.P.S What seems to me interesting.
Although before putting PageContextImpl into pool JspFactoryImpl calls
pc.release(), and inside the method all links must become null (or
not?..) and referenced objects must become available to gc, they are not.
May be it is the root of the problem?..
BTW disabling of pool solves the problem completely...
--
Best regards,
Dmitry Andrievskymailto:[EMAIL PROTECTED]
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--
Thanks and best regards,
Anoop
