I have a java program which has a server-socket listening infinitely.
In case of JVM exiting abnormally through kill pid, what happens to system resources in this case, socket object ? Will the sockets be released or it will be locked up?
What is the best way to handle the cleanup of system resources like file descriptors/network-socket/jdbc connection, in case of abnormal JVM exit.
I know about finalizers, finally, but there is some amount of uncertainty and performance degradation using finalization.
Pls provide some ideas
In the case of an abnormal exit, obviously the JVM can’t do anything specifically to clean up whatever it has allocated. This responsibility would fall next to the operating system itself.
For sockets, modern operating systems will definitely release any sockets that had been opened by a process that crashes. The same applies to files and any other kernel objects (JDBC connections are implemented with some sort of socket).
Finalizers will not be run if the JVM terminates abnormally.