Micka,
I'm glad that someone could help you after you provide better/clearer
information.
Just for future reference :
Micka wrote:
Ok,
Machine A :
OS : Windows Seven
JVM : jre6
Tomcat : v7.0.8
Machine B :
OS : Ubuntu 10.04
Using CATALINA_BASE: /usr/local/tomcat7
Using CATALINA_HOME: /usr/local/tomcat7
Using CATALINA_TMPDIR: /usr/local/tomcat7/temp
Using JRE_HOME: /usr/lib/jvm/java-6-sun
Using CLASSPATH:
/usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar
Server version: Apache Tomcat/7.0.12
Server built: Apr 1 2011 06:13:02
Server number: 7.0.12.0
OS Name: Linux
OS Version: 2.6.32-24-server
Architecture: amd64
JVM Version: 1.6.0_24-b07
JVM Vendor: Sun Microsystems Inc.
Very good. With that kind of information, people here know the basics of your system(s),
and can help much quicker and better, as you have seen.
B) What I do :
step 1 : start TomCat on the server
step 2 : Looking at the log :
step 3 : The application works as a TCP server.
step 4 : a connection is established with a client
step 5 : the server send 1 1 1 5 *252* 2 6 1 ( char array ) to a client
step 6 : the client confirmed the data by sending back an echo : 1 1 1 5 *
63* 2 6 1
step 7 : the server detect that the echo is different of what It sent, it
resend the data.
step 8 : jump to step 5
That is better than before, but still a bit confusing :
In step 3, you say that the application works as a server.
OK. That is what one usually expects from a Tomcat application.
But,
In step 4, you say that a connection is established with a client.
That is confusing, because in the TCP protocol, it is a client which establishes the
connection with a server. The server opens a "listening" socket, and then just waits for
client connections. A client establishes a connection with that server socket, and then
normally it is the client which sends something to the server (a request, a command,..),
and the server responds. Then the connection may be closed, or it may stay open, allowing
for another client request and server response.
That is how HTTP works, and in the Tomcat environment and on this list, most people would
expect that, by default, you are talking about HTTP requests/responses.
So basically at this point, you have most of us confused.
It gets even more confusing, because you never tell us what this "client" really is, and
why it would "echo" something back to the "server".
So that is why you are not getting a lot of responses.
Except from a guru like Konstantin, who was able to brilliantly sift through the obscure
explanation, and devine that your basic problem may just be a question of character encoding.
But you should not take this as a general rule. The people here are generally good, but
they only have their genius moments from time to time.
Reviewing your above explanation (for the 3rd time), I would now think that in fact, your
Tomcat application works as a TCP client, not as a server. It is this application which
creates its own client connection with some other server, right ? And it is that other
server which sends back an echo of the data, right ? Or am I still confused ?
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