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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>How does Systemd communicate to socket activated application that the connection has been closed? How can I modify my application to detect this event if it cannot be configured to be closed automatically?</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are trying to add network support to legacy code using Systemd sockets. Using the 0pointer tutorials, we were able to configure a listening TCP port and launch an instance of the application when a TCP connection came in. The problem is that when the connection is closed, the service is still running.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The systemct list-units and netstat -tuapn outputs are what you would expect when the connection is established<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> systemctl list-units:<o:p></o:p></p><p class=MsoNormal> myapp@5-192.168.0.75:10001-192.168.210.102:19983.service loaded active running My App<o:p></o:p></p><p class=MsoNormal> netstat -tuapn:<o:p></o:p></p><p class=MsoNormal> tcp 0 0 192.168.0.75:10001 192.168.210.102:19983 ESTABLISHED 1/init<o:p></o:p></p><p class=MsoNormal>However, once the client closes the connection, the socket is closed and removed, but the application is still running as a service:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> systemctl list-units:<o:p></o:p></p><p class=MsoNormal> myapp@5-192.168.0.75:10001-192.168.210.102:19983.service loaded active running My App<o:p></o:p></p><p class=MsoNormal> netstat -tuapn:<o:p></o:p></p><p class=MsoNormal> [no entry]<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-Liam Kelly<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>