Configure Apache KeepAlive settings Open up apache’s configuration file and look for the following settings. On Centos this file is called httpd.conf and is located in /etc/httpd/conf. The following settings are noteworthy: KeepAlive: Switches KeepAlive on or off. Put in “KeepAlive on” to turn it on and “KeepAlive off” to turn it off. MaxKeepAliveRequests: The … Read more
I ran into this exact same problem and finally have a solution after some in-depth debugging. Http(s)UrlConnection does handle Keep-Alive by default but sockets must be in a very specific condition in order to be reused. These are: Input streams must be fully consumed. You must call read on the input stream until it returns … Read more
An open TCP socket does not require any communication whatsoever between the two parties (let’s call them Alice and Bob) unless actual data is being sent. If Alice has received acknowledgments for all the data she’s sent to Bob, there’s no way she can distinguish among the following cases: Bob has been unplugged, or is … Read more
on-failure will issue a restart if the exit code indicated a failure, whereas unless-stopped behaves like always and will keep an instance running unless the container is stopped. You can try with the hello-world to see the difference. docker run –restart on-failure hello-world will run once and exit successfully, and running a subsequent docker ps … Read more
From ioS 7 onwards, there are newer ways for apps to run in background. Apple now recognizes that apps have to constantly download and process data constantly. Here is the new list of all the apps which can run in background. Apps that play audible content to the user while in the background, such as … Read more
You can set the TCP keepalive timers on an already-open socket using setsockopt(). import socket def set_keepalive_linux(sock, after_idle_sec=1, interval_sec=3, max_fails=5): “””Set TCP keepalive on an open socket. It activates after 1 second (after_idle_sec) of idleness, then sends a keepalive ping once every 3 seconds (interval_sec), and closes the connection after 5 failed ping (max_fails), or … Read more
Use the urlgrabber library. This includes an HTTP handler for urllib2 that supports HTTP 1.1 and keepalive: >>> import urllib2 >>> from urlgrabber.keepalive import HTTPHandler >>> keepalive_handler = HTTPHandler() >>> opener = urllib2.build_opener(keepalive_handler) >>> urllib2.install_opener(opener) >>> >>> fo = urllib2.urlopen(‘http://www.python.org’) Note: you should use urlgrabber version 3.9.0 or earlier, as the keepalive module has been … Read more
Use the urlgrabber library. This includes an HTTP handler for urllib2 that supports HTTP 1.1 and keepalive: >>> import urllib2 >>> from urlgrabber.keepalive import HTTPHandler >>> keepalive_handler = HTTPHandler() >>> opener = urllib2.build_opener(keepalive_handler) >>> urllib2.install_opener(opener) >>> >>> fo = urllib2.urlopen(‘http://www.python.org’) Note: you should use urlgrabber version 3.9.0 or earlier, as the keepalive module has been … Read more
For Express 3: var express = require(‘express’); var app = express(); var server = app.listen(5001); server.on(‘connection’, function(socket) { console.log(“A new connection was made by a client.”); socket.setTimeout(30 * 1000); // 30 second timeout. Change this as you see fit. });