When a component in plugin implements LifecycleAware interface, the onStart/onStop methods are supposed to be called when the plugin is started/stopped. However, the onStop is not triggered when the plugin is uninstalled. 

The confluence implementation of LifecycleManager com.atlassian.sal.confluence.lifecycle.TenantAwareLifecycleManager does not seem to do it correctly. 

 Steps to replicate it: 

1. Create a class implementing LifecycleAware in a plugin:

public class TestComponent implements LifecycleAware {

    public ExpiredSessionRemover() {
       
    }

    @Override
    public void onStart() {
       System.out.println("TestComponent started");
    }

    @Override
    public void onStop() {
        System.out.println("TestComponent stopped")
    }

2. Register it in plugin.xml

<component key="testComponent" class="com.abc.TestComponent" public="true">
    <interface>com.atlassian.sal.api.lifecycle.LifecycleAware</interface>
</component>

3. Deploy the plugin

4. Uninstall the plugin

You will see the "TestComponent started" is printed in console while "TestComponent stopped" is not printed.