Identifying the port number where Tomcat is running.

I want to mail the URL of the my application dynamically with the system generated mails. With the help of java.net package I am able to get the IP address of the system, but I have hard coded the port no in the URL. I want to make the port no. also dynamic (E.g. IP address is not hard coded).
The servlet is deployed to the Tomcat server. What code I write to know the port on which the tomcat is running ?
thanks in advance,
Mukesh.

You could use ServletRequest.getServerPort() to find out the port number on which the request is being sent by the client but I don't know if this will help you.
People on the forum help others voluntarily, it's not their job.
Help them help you.
Learn how to ask questions first: http://faq.javaranch.com/java/HowToAskQuestionsOnJavaRanch
(Yes I know it's on JavaRanch but I think it applies everywhere)
EDIT: ServletRequest.getLocaPort() gives the port at which the request is received; I'm not quite sure what the difference is ( I can guess but I'm not certain ) and I don't know which, if either, will be of use to you.
Edited by: nogoodatcoding on Oct 9, 2007 7:26 PM

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Tomcat Server Port Number: Why do I have to enter the port number?

My ultimate goal is to setup a website that displays data from a database. I will use Java, Apache, Oracle, and whatever else I need to create a website the uses servlets, JavaServer Pages, and JDBC.
I�ve got four Pentium III computers:
1. Windows 2000 Server to be the web server (MyWebServer, IP = 10.10.1.1).
2. Windows 2000 Professional to be the database server (MyDatabaseServer, IP = 10.10.1.2).
3. Windows 2000 Professional that I use to develop and test (MyDeveloperPC, IP = 10.10.1.3).
4. Windows 2000 Professional that I use as a client to connect to the website (MyClientPC, IP = 10.10.1.4).
I installed Java Web Services Developer Pack on MyWebServer. It requires Java 2 Standard Edition (J2SE), so I installed that first. The files I downloaded and installed are as follows:
J2SE: j2sdk-1_4_0-rc-win.exe
JWSDP: jwsdp-1_0-ea1-win.exe
After installing these products, I set the environment variables as follows:
JAVA_HOME = c:\j2se
JWSDP_HOME = c:\jwsdp
Path = c:\j2se\bin;c:\jwsdp\bin; [and other previous statements]
On MyWebServer I start Tomcat (from the JWSDP menu option). It starts properly (as far as I can tell).
Then, from MyClientPC I open Internet Explorer and in the address box I type:
http://10.10.1.1
�The page cannot be displayed�.
I then try again and add the port number:
http://10.10.1.1:8080
This displays the page c:\jwsdp\webapps\root\index.html.
Here�s my question: Why do I have to enter the port number to get a page displayed? Do I have to have Apache HTTP Server running on MyWebServer to display pages without entering the port number?
Thanks for your help.

Oh simmy1, so silly....
You have to enter the port number because Tomcat is running on that port (probably 8080). You actually don't NEED apache at all. Most people use it an HTTP listener because historically, servlet engines and application servers had shitty listeners. (WebLogic 5.1 was really bad.) Not sure how they stack up today.
Port 80 is the default port that browsers will look at. (Try it, hit these forums with http://forum.java.sun.com and then hit it with http://forum.java.sun.com:80. See? Same thing.) If you don't want to have to enter a port number, just make sure whatever is running at the front of your network is serving on port 80. It doesn't matter if its apache, tomcat, weblogic, iis or whatever. There is nothing wrong with running Tomcat on port 80, although using a webserver proxy like apache is generally recommended.
And don't listen to simmy1, this is his second bonehead post I've seen today: http://forum.java.sun.com/thread.jsp?forum=45&thread=231154

Java and Tomcat: Why do I need the port number when accessing Tomcat?

My ultimate goal is to setup a website that displays data from a database. I will use Java, Apache, Oracle, and whatever else I need to create a website the uses servlets, JavaServer Pages, and JDBC.
I�ve got four Pentium III computers:
1. Windows 2000 Server to be the web server (MyWebServer, IP = 10.10.1.1).
2. Windows 2000 Professional to be the database server (MyDatabaseServer, IP = 10.10.1.2).
3. Windows 2000 Professional that I use to develop and test (MyDeveloperPC, IP = 10.10.1.3).
4. Windows 2000 Professional that I use as a client to connect to the website (MyClientPC, IP = 10.10.1.4).
I installed Java Web Services Developer Pack on MyWebServer. It requires Java 2 Standard Edition (J2SE), so I installed that first. The files I downloaded and installed are as follows:
J2SE: j2sdk-1_4_0-rc-win.exe
JWSDP: jwsdp-1_0-ea1-win.exe
After installing these products, I set the environment variables as follows:
JAVA_HOME = c:\j2se
JWSDP_HOME = c:\jwsdp
Path = c:\j2se\bin;c:\jwsdp\bin; [and other previous statements]
On MyWebServer I start Tomcat (from the JWSDP menu option). It starts properly (as far as I can tell).
Then, from MyClientPC I open Internet Explorer and in the address box I type:
http://10.10.1.1
�The page cannot be displayed�.
I then try again and add the port number:
http://10.10.1.1:8080
This displays the page c:\jwsdp\webapps\root\index.html.
Here�s my question: Why do I have to enter the port number to get a page displayed? Do I have to have Apache HTTP Server running on MyWebServer to display pages without entering the port number?
Thanks for your help.

When you web server is running at the default Http Port, then you do not have to specify the port yourself.(The browser does it automatically)
So if you run your web server at port 80, then you will not have to specify the port explicitlyin the url.
If you want to use tomcat only as a jsp/servlet processing engine then install a web server (either IIS, or apache web server) and run it on port 80. (so that you dont have to specify the port)
Now configure tomcat to run as a servlet engine for this web server. for this refer to the tomcat documentation.
If you do not want to have an external webserver then you can configure tomcat itself to run at port 80 (in this case tomcat would do the work of both the web server as well as jsp/servlet engine... but this is not the setup for a production site). this can be done by changing the server.xml file in the conf directory of tomcat installation.
hope this helps.
regards,
Abhishek.

Warning: Either the server is already running or the port number is invalid. Shut down the MATLAB process in which the server is running or run the server on a different port number.

安装好SIT后，matlab 提示
Warning: Either the server is already running or the port number is invalid. Shut down the MATLAB process in which the server is running or run the server on a different port number.
怎么解决？

这个应该和SIT无关，意思是你有个MATLAB进程占用了某个端口号或者matlab的服务器正在运行，导致你现在的程序没法建立这个端口的服务器。试试刀windows进程管理里把matlab相关的进程kill掉，再启动试试。或者参考链接http://www.cnblogs.com/qiweiwang/archive/2010/07/29/1788281.html 里边有关于建立服务器的描述，就在前半部分。

Change the port number

can i install Oracle server and tomcat server on same machine ?
how to change the port number in OracleXE 10g. so that i can install oracle Data base and tomcat on same machine.

can i install Oracle server and tomcat server
on same machine ?Yes.
>
how to change the port number in OracleXE 10g.
so that i can install oracle Data base and tomcat on
same machine.Just make sure Tomcat is running while you install Oracle, and it should find the port in use.
Otherwise, turn tomcat off, install using port 8080, and use the sqlplus command 'exec dbms_xdb.sethttpport(8090); to change the port to 8090 after the fact.
Before installing:
1) On WIndows, use a LOCAL machine administrator, not a domain administrator or non-admin user;
2) On Windows, turn off all firewalls before installing; on Fedora, turn off SELinux;
3) If there was a previous Oracle on the machine, on windows make sure the registry is clean.

How do i find the port number for oracle10g

Hi,
I have installed oracle10g on my pc running windows XP. I need to get the port number for JDBC drivers used by Java Application when defining a JDBC source.
Java is running on the same machine.
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Cheers

thanks for the reply the portlist does not contain the port of oracle. The file is below.
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Enterprise Manager Agent Port =
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Hi All,
In our applications built using Weblogic Portal 10.3, the url to access the application doesnt have the port number. It is simply like http://<server-name>/<context> no port at all. Is this some configuration that is available inside weblogic adminstration console? The domain has both the default port and the SSL port enabled which are running in 7001 and 7002 respectively. Please let me know as how to do this configuration as I am growing haywired on this it has been about a week and have not found an answer yet. Please throw some light on this and let me know if you need further details
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you should install apache server to handle all the requests on port 80 and froward it to weblogic server using wlp plugin
please check this link
http://download.oracle.com/docs/cd/E13222_01/wls/docs81/plugins/apache.html
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Is it possible to change the port number of an already installed ITS?

Hello,
I've done an install of the latest ITS stand-alone application (win2k server , IIS). It was installed on port 81.
Is there an easy way to change the port number of this ITS installation without doing a new install? I know there are port references in the itsregistrywgate.xml file but was not sure if these were maintained during install or by reading the global.srvc file entries.
I've taken the simplistic steps of changing the port number in IIS and the global.srvc file but that does not work. I get a 403.2 read access forbidden error.
Any advice would be much appreciated.
Thanks,
Graham

Hello Graham,
yes, it is possible but depends on what you want.
For IIS, WGate is depending on the following items:
ISAPI wgate (the filter API that triggers on /scripts/wgate) which is normally a general isapi for all webserver instances.
the virtual directory "SAP-WGate-Scripts" which exists for the according "virtual" webserver instance.
the (web)servername in wgate registry, which points to your virtual webserver
the "Port" in the URL section in wgate registry.
So, if you want to change the port (e.g. from 81 to 82) for both your virtual webserver and the wgate then go ahead.
But if you want an extra virtual host (e.g. on 82) then:
create the virtual host on 82
create a "SAP-WGate-Scripts" directory on this 82 host exactly as the one on the 81 host.
change the "Port" in the wgate URL section.
if you also have an own docroot directory you have to copy the SAP mimes from the 81 docroot to the new one.
The only thing that will be wrong afterwards is the webservername, this will have no effect on the runtime behavior but at the next patch install you will get an extra dialog to identify your webserver again.
If you wanted to go for the latter scenario then it might be less work to add a new instance by install e.g. a dual host wgate on the new virtual host or a single host install (with a dummy agate).
Afterwards you can play around with the WGate configuration to change it to your needs.
Regards,
Fekke

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Yesterday i downloaded this new sun java studio enterprise and found it mind blowing.
Now i find that all my previous applications which were running on port 8080 can't be run on sun java studio enterprise(sjse) 8.
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http://docs.sun.com/source/819-0080/install.html
In the Admin Configuration page (or at the command line), enter the following:
Admin User Name�Name of the user who administers the server
Password�Admin user�s password to access the Admin Server (8-character minimum)
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thanks in advance
PaulP

Hi PPlatt,
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HTH
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Hi,
We have Application on Node 1 and Database on Node 2
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DB: 9.2.0.6
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Identifying the port number where Tomcat is running.

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