basics of container and ports behaviour

[gopi nath]

QUES1:can a web container listen to many ports?

QUES2:can many web containers listen to a single port?

QUES3: given the port number how do we find which tomcat web container listens to it.

QUES4:given the container (say tomcat_001),how do we find the ports to which it listens?

QUES5:Where are these ports physically present(i.e like...network card or.. etc?

ques6:I need some overview about webservers and containers(my knowledge in webservers or app server= 1/10).So please suggest me a good link to get some working knowledge or basic knowledge about servers!

[Ben Souther]

"mercury falls",
Please check your private messages regarding an important administrative matter.
-Ben

[gopi nath]

Hi ben.I have gone through the naming policy and i have changed the name!!

[William Brogden]

1. yes
2. one
3,4. Tomcat configuration file server.xml, look for "port="
5. a lot of operating system sits between hardware and Java port programming
6. start simple - a google search for "web server tutorial" turned up lots
Installing and running Tomcat as a local server will teach you lots.

Bill

[gopi nath]

Thanks yaar!!
is it "yes"or "no" for ques 2 and for ques 4 ...
if i have 40 container present inside a web server and how is it possible to open every server.xml file to find which container listens to a particular port(say port number=7193)!

[gopi nath]

ques 2 was posted wrongly!!
sorry
this is the right one..
can many web container listen to a single port??

[Ulf Dittmer]

No.

[William Brogden]

if i have 40 container present inside a web server and how is it possible to open every server.xml file to find which container listens to a particular port(say port number=7193)!

Tomcat uses a SINGLE server.xml file to configure the part of the container that listens for requests. There is only one "container" which can hold many "web applications."

Like my previous post said, I think you should start with the basics by installing Tomcat, running some examples, and studying how the various configuration files work instead of jumping to conclusions about non-existant problems.

Bill

[gopi nath]

---------------------------------------------------------------------------
Tomcat uses a SINGLE server.xml file to configure the part of the container that listens for requests. There is only one "container" which can hold many "web applications."

Like my previous post said, I think you should start with the basics by installing Tomcat, running some examples, and studying how the various configuration files work instead of jumping to conclusions about non-existant problems.
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FROM TOMCAT DOCUMENTATION WHAT I CAME TO KNOW IS THAT,TOMCAT IS A WEB-CONTAINER.
CONTAINER PROVIDES EXECUTION ENVIRONMENT AND OTHER TAKE CARE OF SERVLET LIFECYCLE AND OTHER STUFF.
WEB-SERVER'S MAIN WORK IS TO HANDLE REQUEST AND RESPONSE,ETC.

IN MY WORKING APPLICATION I HAVE A WEB-SERVER WHICH CONTAINS 11 WEB CONTAINER AND AS YOU SAY EACH WEB CONTAINER HAS A SERVER.XML FILE AND HENCE 11 SERVER.XML ARE TOTALLY AVAILABLE.
NOW IF SUPPOSE MY BOSS ASK ME " HI GOPINATH,CAN YOU FIND ME WHICH ARE THE CONTAINERS WHICH LISTEN TO PORT XXXX ".IN THAT CASE,YOU NEED TO OPEN ALL THE 11 SERVER.XML FILES TO FIND THE CONTAINERS WHICH LISTEN TO THE GIVEN PORT XXXX.AM I RIGHT??!!!
MY DOUBT IS ,IS THERE ANY ALTERNATIVE TO THIS???

[karthikeyan Chockalingam]

There are utilities which list the name of the process and the related port used. Please search for those. Else open all the server.xml and maintain proper documentation which will be useful in future.
[ May 15, 2008: Message edited by: karthi keyan ]

[Ben Souther]

Gopi,

Please be aware that typing with the caps-lock button down is the equivalent to yelling or shouting in a web forum and is considered rude. Many people, myself included, will not bother to read a question that is typed this way.

You can always go back and fix posts like this by clicking on the link in the post.

[William Brogden]

I HAVE A WEB-SERVER WHICH CONTAINS 11 WEB CONTAINER

If you have a single instance of Tomcat, you have a single container.
If you have 11 containers you must be running 11 instances of Tomcat.
Each instance of Tomcat must have its own unique port settings in its own server.xml or trouble will result.

Bill

[Ben Souther]

Originally posted by William Brogden:

Each instance of Tomcat must have its own unique port settings in its own server.xml or trouble will result.

<fussy correction>
More of an addition than a correction.
...must have its own unique ip:port settings.
Multiple copies of Tomcat, or multiple connectors within a single instance of Tomcat can listen on the same port as long as they're configured to listen on different IP numbers.
</fussy correction>

[gopi nath]

sorryfor typing in caps .i do not know such meanings will exists..
-------------------------------------------------
<fussy correction>
More of an addition than a correction.
...must have its own unique ip:port settings.
Multiple copies of Tomcat, or multiple connectors within a single instance of Tomcat can listen on the same port as long as they're configured to listen on different IP numbers.
</fussy correction>
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we are disscussing about the case of same webserver(say: its ip=xxx.yyy.zzz.aaa)...
so where does the case comes of a different ip numbers?
Multiple copies of Tomcat, within a single instance of Tomcat!!
wat does it mean??? can we tell no of instance==no of containers which are started?