By default, UNIX/Linux typically retransmits 10 to 20 times over 8 to 20 minutes. I am currently starting the Socket.IO service in the onResume and stopping in onPause of each Activity in the app. In order to avoid this stop the timer in the begin of Connect() and start the timer in end of Connect(). "Always stay connected" mechanism for socket connection. in java, I can set the power manager to keep a socket connection alive like following PowerManager.WakeLock newWakeLock = ( (PowerManager) getSystemService ("power")).newWakeLock (1, "Socket:WakeLock"); also with wifi WifiManager.WifiLock createWifiLock = ( (WifiManager). To learn more, see Tutorial - Use MQTT to develop an IoT device client. Run regedit to edit the Windows Registry key located in the path HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters. Thanks for contributing an answer to Stack Overflow! I think this is more appropriate here than on server fault since it just asks for explanations of the technology which can help programmers. For more information, see the System properties section of IoT Hub message routing query syntax. In this message, the request ID must match the one in the request message, and status must be an integer. IntelliJ IDEA WebStorm Visual Studio Android Studio Eclipse Visual Studio Code PyCharm Sublime Text PhpStorm Vim GoLand RubyMine Emacs Jupyter Notebook Jupyter Lab Rider DataGrip AppCode; Company A persistent connection also reduces the number of TCP and SSL/TLS connection requests, leading to a drop in round trip time (RTT). With keep-alive, the above becomes. If you only have one activity and you handle socket disconnection in onStop and then reconnection and data retrieval in onStart, then it's the same. On the accepting host, bpcd will timeout after 300 seconds causing the connecting host to have theauth-only socketinTCP CLOSE_WAIT andthe the secure connections inTCP ESTABLISHED and the kernel will send TCP Keepalives per the tuning. More info about Internet Explorer and Microsoft Edge. Looking for job perks? This limit exists because all Azure services are bound to the Azure load balancer TCP idle timeout, which is 29.45 minutes. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? The {property-bag} element enables the device to send messages with other properties in a url-encoded format. And to make this not just a thank you comment yes Content-Length is not always applicable but there are other ways to tell the client where the response ends and that is what is important since you lose "Read all then end" possibility by keeping connection open. QGIS automatic fill of the attribute table by expression. We can then open a socket in the OS API to represent that connection, and we can treat that socket as a file descriptor (literally an FD in Unix, very similar to file HANDLE in Windows). rev2023.4.21.43403. Why xargs does not process the last argument? On Windows Server2003, WindowsXP, and Windows2000, the default setting for number of keep-alive probes is 5. I think it's appropriate, similar questions have been asked before. This seems really inefficient because I basically stopping the socket and recreating a new one every time I press the home button, or switch to another activity in the app. Was Aristarchus the first to propose heliocentrism? $ tcpdump -n -nn -i eth2 host 192.168.1.12 and port 1556snipped application traffic when bptestbpcd first connected to bpcd.15:51:09.409304 IP 192.168.1.12.1556 > 192.168.1.15.48070: Flags [P.], seq 5547:5549, ack 3943, win 192, length 215:51:09.410528 IP 192.168.1.12.1556 > 192.168.1.15.54336: Flags [P.], seq 5482:5521, ack 4530, win 259, length 3915:51:09.410825 IP 192.168.1.15.54336 > 192.168.1.12.1556: Flags [.
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