#Net core cron job code
#Net core cron job free
#Net core cron job windows

#Net core cron job free

While /etc/rc.local seems to free the memory continuously, the cronjob requires more and more memory. 1 Answer Sorted by: 0 Your cron expression doesnt seem to find any problems, and I can parse it out with it. Unfortunately, what happens, is that the program, started by Cron or by /etc/rc.local skips the ReadLine() and runs into an endless loop, messing up the memory (and maybe swap on hard drive) with an endless number of Enter 'exit' to close MyApp. Rate expressions are simpler to define but do not offer the fine-grained schedule control that cron triggers support. Using this code, I wanted to keep the program running until a user inputs exit or until this 'service' is killed.

#Net core cron job code

Here is the last part of the C# code of my console application: // App can be quit by keyboard input 'exit'Ĭonsole.WriteLine('Enter 'exit' to close MyApp.') Fire-and-Forget Jobs Fire-and-forget jobs are executed only once and almost immediately after creation.

#Net core cron job windows

No Windows Service or separate process required. ReadLine() waiting for a certain input).ĭetails: I found out what happened. An easy way to perform background processing in. Tl dr Avoid user interaction in the console app (e.g. There is no problem when starting manually or from /etc/local.rc, but just when starting from the cronjob. I have no idea at all what could be the problem. Su service -c 'sh /home/service/my-app.sh' &Īgain, it started perfectly fine after reboot, and there is also no memory leak any more. It means that we need to run a scheduled task (or several separate tasks in the future) each minute. However, now we need to do it automatically. To run some calculation we used to call an API method of our app. Now I tried to remove the cronjob and added the launcher script to the /etc/local.rc file instead: # Start MyApp We are running the C asp.net core application using AWS Lambda service. But: When I restart MyApp manually, there is no memory leak any more. When I cancel MyApp after reboot, I see that the 'memory leak' is immediately stopped. After about 10 minutes, the whole free space is gone, and MyApp is quit by the system. the total size of /home/service does not increase. But, when calling df repeatedly, I noticed that the free disk space of / was continuously decreasing! I tried to find out which file it is, but ncdu did not show any difference over time. I wanted to start the file after reboot, so I created a cronjob for the launcher script, using crontab -e: /home/service/my-app.shĪfter reboot, MyApp lauches perfectly fine. There is a simple launcher script in my home folder, called my-app.sh: cd /home/service/my-app NET Core 3.0 Console App, running on a Ubuntu 18.04 server.