You are using HTTP/1.1 and you are specifying Connection: keep-alive. Under HTTP/1.1 all connections are keep-alive by default, and the Connection: keep-alive header has been deprecated, so you should not send it. Connection: keep-alive is a little hack used back in the so-called HTTP/1.0+ days. (The + stands for "hacks necessary to get it to

Keep-Alive should ALWAYS be enabled. There is no downside to enabling HTTP keep-alive when it comes to improving your website speed. Using a keep-alive connection will almost always speed up your website. Enabled by default – but not always. In most cases keep-alive is enabled by default on web servers. But in some cases it’s not. Keepalive: A keepalive is a signal sent from one device to another to maintain a connection between the two devices. This may be between a client and a server, but it could apply to any number of devices or technologies. Keepalives are used in network environments to maintain an open communication pathway, or to regularly check the status of a Jun 21, 2017 · The Connection Keep-Alive feature helps preventing connections to be closed due to time-outs of this kind by periodically executing a simple SELECT statement. Network connections may be terminated for other reasons than a time-out in the database or at the network layer, e.g due to a restart of the database or a network element. Mar 13, 2019 · Keep-Alive is build with the idea of sending multiple HTTP requests/responses via one TCP connection thus significantly reducing the time needed for the web browser to load files from the web server. Keep-Alive is utilized to the fullest when dealing with static content like images as it allows the requestor to get all of the images from the

The Hypertext Transfer Protocol uses the keyword "Keep-Alive" in the "Connection" header to signal that the connection should be kept open for further messages (this is the default in HTTP 1.1, but in HTTP 1.0 the default was to use a new connection for each request/reply pair).

The Application Server’s Keep Alive system addresses this problem. A waiting keep alive connection has completed processing the previous request, and is waiting for a new request to arrive on the same connection. The server maintains a counter for the maximum number of waiting keep-alive connections. One way to test HTTP persistent connection/Keep-Alive is to see if the TCP connection is reused for subsequent connections. For example. Client keep-alive keeps the connection between the client and the appliance (client-side connection) open even after the server closes the connection with the appliance. This allows multiple clients requests using a single connection and saves round trips associated in opening and closing a connection. The underlying connection was closed: The connection was closed unexpectedly. When this exception is thrown, it is calling a method of a web reference. Now the situation that we experience this is on a laptop in the field that is using a WWAN connection in at least one location.

An application can request that a TCP/IP provider enable the use of keep-alive packets on a TCP connection. The default is that the use of keep-alive packets on a TCP connection is disabled. The default settings when a TCP socket is initialized sets the keep-alive timeout to 2 hours and the keep-alive interval to 1 second.

The Telnet server takes advantage of the TCP keep-alive functionality with its Session keep-alive parameter (TIMMRKTIMO). For Telnet, the recovery action depends on the type of virtual device associated with the user's interactive job. If it is an auto-selected virtual device (for example, QPADEV0002), then the interactive job is always ended. The Application Server’s Keep Alive system addresses this problem. A waiting keep alive connection has completed processing the previous request, and is waiting for a new request to arrive on the same connection. The server maintains a counter for the maximum number of waiting keep-alive connections. One way to test HTTP persistent connection/Keep-Alive is to see if the TCP connection is reused for subsequent connections. For example. Client keep-alive keeps the connection between the client and the appliance (client-side connection) open even after the server closes the connection with the appliance. This allows multiple clients requests using a single connection and saves round trips associated in opening and closing a connection.