we are facing an issue with WCF service hosted in a Windows service with net.tcp binding.
After some time it closes all connection (we see it in real time with TCPView). We noticed this behavior because in the client application log we find errors of TCP connection refused 10061. When all connection are close it starts to accept new conections. All firewall and antivirus has been disabled. RAM and CPU are ok.
What can I look for?
Thanks
Related
i am having an application running inside a gateway,
this application is a coap-server coded using the libcoap library
the server is running perfectly fine, the ip:port is tested using different commands such as nmap , telnet and others, each time it shows that the port is open and the connection is a success.
My problem is that there's no response from the server, wireshark is showing that the requests are being re-transmitted until timeout.
After some research, i thought that the gateway doesn't support NAT loopback, so i tried sending requests from another connection (i used my phones 4G). I even disabled firewall on the gateway too, But no success either.
UPDATE:
after some digging, i managed to receive a response from the server, but only when using TCP connection, the UDP still sends requests until timeout,
from a logical point of view, what may be the problem here ?
note: UDP is a must in this application so i cant just ignore it.
I am failing to connect to this SQL Server 2019 using a fully qualified database server name,21433. This has been working for over 18 months. There is a new network changes. The rule for mapping 21433 is active.
The connection fails when I use Verizon's gateway network but when I tether my sprint phone it works.
The error below:
Connection Timeout Expired. The timeout period elapsed while attempting to consume the pre-login handshake acknowledgement. This could be because the pre-login handshake failed or the server was unable to respond back in time. The duration spent while attempting to connect to this server was - [Pre-Login] initialization=43; handshake=29988; (.Net SqlClient Data Provider)
The problem was with Palo Alto VPN.
When it was enabled, it blocked any port other 3389.
When it was disabled, I could connect to the port 21433 worked perfectly. The downside
as I could not rdp because the Palo Alto VPN was disabled.
It will be fixed by properly configuring the Palo Alto VPN.
The pricing for Azure SignalR Service is based on Concurrent Connections.
However, I can't find the definition of a Concurrent connection.
I have an ASP.Net Core MVC Web Application. I understand that the server application connection to the Azure SignalR Service is one connection. Each client (browser) that connects to my web app is another connection. But are these considered concurrent connections? Or just open connections sitting there waiting for a message to be sent?
I'm hoping that the count of concurrent connections is a count of connections that are actively sending a message. Is that the case?
Ok so I figured out that a Concurrent connection is any connection to the SignalR Service!
I ran through the quickstart tutorial here
And then used the Azure Metric as I connected various clients to the chat room, and this is what I found:
After starting the app in debug mode, it seems the server immediately uses 5 connections. Then, as I open the url in various browser tabs, a new Client connection is established. As expected, the 16th browser tab does not establish a SignalR connection (Because I am on the Free SignalR Service tier, which has a limit of 20 connections.)
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.
I have web apllication which runs in localhost using eclipse,i am trying to access that from
other computer using URL...but the browser throwing error.
The connection has timed out
The server at xyz.xyz.1.2 is taking too long to respond.
The site could be temporarily unavailable or too busy. Try again in a few moments.
If you are unable to load any pages, check your computer's network connection.
If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the We
the URL looks like this:xyz.xyz.1.2:8080/MyProject/GetUserSMSAction and the server is
running in xyz.xyz.1.2..:(
The port 8080 is probably not oppened on your computer.
If your network administrator won't open it, try changing the configuration to use the port 80 and this will solve your problem.