java-graceful-shutdown-sample

Sample application to demonstrate the threads to be shutdown gracefully

How to run this project

mvn clean package
cd target
java -jar <jarname> (to run as background process, check below items)

Observations

1. While stopping process from IDE console, it won't executing shutdown hook (tested with Eclipse)
2. While stopping process using TASKKILL /F command from Windows, it won't executing shutdown hook (it's not stopping without using /F option)
3. While stopping process using Ctl + C from Windows, it will execute the shutdown hook
4. While stopping process using kill <PID> from Linux, it will execute the shutdown hook (not the kill -9)

Useful commands for this project

Run java process on Windows & Linux

java -jar test.jar

Run java process in background on Windows

javaw -jar test.jar

Run java process in background on Linux

nohup java -jar test.jar &

Finding java process id using command line on Windows

C:
cd "C:\Program Files\Java\jdk1.8.0_162\bin"
jps -lv

Kill process on windows

TASKKILL /F /<PID> (forcefully)
TASKKILL /<PID> (gracefully, this way is not working to kill java background process)

Finding java process ids using command on Linux

ps aux | grep java

Kill process on linux

kill -9 <PID> (forcefully)
kill <PID> (gracefully)