private void removeShutdownHook()

in src/main/java/org/apache/commons/exec/ShutdownHookProcessDestroyer.java [139:159]

• 16 lines of code
• 5 McCabe index (conditional complexity)

    private void removeShutdownHook() {
        if (added.get() && !running.get()) {
            final boolean removed = Runtime.getRuntime().removeShutdownHook(destroyProcessThread);
            if (!removed) {
                System.err.println("Could not remove shutdown hook");
            }
            // start the hook thread, a unstarted thread may not be eligible for garbage collection Cf.: https://developer.java.sun.com/developer/
            // bugParade/bugs/4533087.html
            destroyProcessThread.setShouldDestroy(false);
            destroyProcessThread.start();
            // this should return quickly, since it basically is a NO-OP.
            try {
                destroyProcessThread.join(20000);
            } catch (final InterruptedException ignore) {
                // the thread didn't die in time
                // it should not kill any processes unexpectedly
            }
            destroyProcessThread = null;
            added.compareAndSet(true, false);
        }
    }