I was trying to monitor request using TCP/IP Monitor.
But, I see there are two ports which are in use. One is the application port[8080] and other monitoring port[9833].
Can anybody tell , why there are two different ports?
When I launch the application it launches at 9833 instead of 8080. Why this change?
Eclipse monitoring is done by capturing all the requests sent to an application (a host and a port), dumping it on the Monitor console for you, then forwarding the original request to the application.
The monitored application itself will return its responses to eclipse (where it is the client from its prospective) where eclipse dumps it on the monitoring console too.
Now, how does eclipse captures the requests sent to the monitored application at the first place? it simply runs a service that accepts these requests (on behalf of the application) and forward it, this service also returns the application responses to the original requester.
Based on the above, in eclipse TCP/IP Monitor screen, the Local monitoring port is the port of the eclipse service (which you can use any available port number for), and the other Port is the monitored application port number.
So, in your case, the application you are monitoring is running on port 8080 and eclipse service is using the port 9833 (which is just a random port that you can change).
Your application port have not been changed, it still runs on 8080 and you can try that, but no data will be captured by eclipse TCP/IP monitor unless you use the port 9833.
Related
I installed Eclipse and the Jboss Tools plugin with Wildfly.
I can run Wildfly in Eclipse in non-debug mode with no problems. But when I start Wildfly in debug, I can use it for a few minutes, and then it suddenly stops processing, the server ends.
I checked the log and there's nothing. What could be wrong?
Please note the JBoss Tools 4.9.0 is validated against 2018-09 but not against 2018-12.
Do you see something in the server log when the server dies ?
We had this issue and it was because we changed our config to close the management port, which had been used to detect that the server had started. Eclipse could no longer detect that the server had started, so it shut down the process after a set time (450 seconds)
To resolve the issue, we did the following in the Eclipse's Overview panel for our JBoss Server:
Changed the Start Timeout to 30, so it would only fail if it actually couldn't start in 30 seconds rather than waiting for 450
Changed our "Server State Detectors" to detect a Web Port for Startup Poller and Process Terminated for Shutdown Poller.
Changed the Server Ports to match our new configuration
Excerpt from JBoss Community Archive
The tooling was unable to verify your server started. Our tooling has several methods to see if your server is up or not. The two most-often used methods are either "Web Port Poller" or "Management Poller".
You can see which your server is using by opening the server object (In Servers view, double-click your server) and on the right side you'll see a section on polling.
If your server adapter (fancy word for the tooling's representation of your server) is using the Management Port Poller, you should make sure your server is actually exposing the management port. For local servers this shouldn't be an issue, since local servers should automatically expose the management port. You may want to verify in the Ports section (also in the server editor) that the management port is correct. To check if the server is up, we run a management command against the server. If the server responds properly, we declare the server to be started.
If you're using the web port poller, then you may want to verify your web port is correct. To verify the server is up, the Web Port Poller opens a URL connection on {serverHost}:{webPort} and sees if we get a valid connection.
Let's assume I'm in computer A, I have a few servers running on different ports, but all are basically an instance of the same program (just binding to different ports). Now, computer B, a client, does he need to know what port is the software he wishes to connect to on computer A?
The point is, I am implementing some sort of communication similar to sockets. Everything should work fine but I'm not sure how to create the initial-message from a computer to another - I just don't know to what port to send it to. Does the client know the port he's sending to on the server?
Say here (client): clientsocket.connect(('localhost', 8089)), does the client connect a server running on port 8089? If so, what port is his socket on (what port is he using for the client?
Yes. The only way for the network stack on computer A to know which process to deliver an incoming packet is for computer B to set the correct port in the packet. A web server runs on port 80 by default, but a machine running several distinct web servers will run them on distinct ports, and a client must be specific about which server they want to connect to. http://example.com, http://example.com:8080, and http://example.com:12345 would refer to the servers running on example.com on ports 80, 8080, and 12345, respectively.
In order to know which port to use in your client, you need to read the documentation for the server you want to connect to.
Going in the other direction, the port used by the client to receive responses is typically set by the networking stack automatically. The client doesn't need to do anything special to set it, and the server simply sends packets back to the address/port found in the source portion of the incoming packet.
It is showing port number clash. See the error below :
Several ports (8080, 8080) required by Tomcat v6.0 Server at localhost are already in use. The server may already be running in another process, or a system process may be using the port. To start this server you will need to stop the other process or change the port number(s).
How to change the port number of one of those?
I have a semantic web/RDF application which runs on Tomcat and is backended with MySQL. Apache HTTPD is in front as a reverse proxy and the OS is Red Hat Linux 6. I am seeing a lot of Connections to port 80 per IP. What I want to know is what determines whether the include for a css or .js file is served over the existing TCP socket, or a new one is created for each GET that occurs while the web page is "built". Is that exclusively the application itself, or is it the Apache web server, or the Linux kernel as well?
I need to monitor a http request and response for web site running on remote web server. The web server makes lot of web service call and would like to trace them.
If the web site was running locally, Fiddler traces every web service call request and provides me with a report. Could someone please help me with how the same is possible
*e.g.
If the web application is running locally and calls two web services fiddler shows the total time on statistics. However, if the web application is running on web server hosted on different web server hosted internally (intranet) and I ran fiddler on my machine, I don't get the statistics for each web service call. All I can see is the total time for the aspx page.*
So question is how (if possible) can I trace the statistics of each web services invoked by web application that's running on different machine and fiddler is running on my machine.
Thanks.
You could always use WireShark http://www.wireshark.org/ to catch all the packets, if you are on the same network as the server, that is.
Say you're running a website on port 80 of a machine named WEBSERVER. You're connecting to the website using Internet Explorer Mobile Edition on a Windows SmartPhone device for which you cannot configure the web proxy. You want to capture the traffic from the phone and the server's response.
0.)Start Fiddler on the WEBSERVER machine, running on the default port of 8888.
1.)Click Tools | Fiddler Options, and ensure the "Allow remote clients to connect" checkbox is checked. Restart if needed.
2.)Choose Rules | Customize Rules.
3.)Inside the OnBeforeRequest handler, add a new line of code:
if (oSession.host.toLowerCase() == "webserver:8888") oSession.host = "webserver:80";
5.) navigate to http://webserver:8888
Requests from the SmartPhone will appear in Fiddler. The requests are forwarded from port 8888 to port 80 where the webserver is running. The responses are sent back through Fiddler to the SmartPhone, which has no idea that the content originally came from port 80.
You can setup Fiddler in your machine and set it as a proxy in the web application you want trace. Easy inside a network, not so easy accross the interwebs.