我试图完全按照the instructions from the online docs的顺序，甚至在每一行都包含了System.identityHashCode(this)，以确保它是同一个对象，并且没有被垃圾收集：

public class MyLambdaHandler extends AppConfigHelper implements RequestStreamHandler, Resource {
    public MyLambdaHandler() {
        System.out.println("Constructor called: " + System.identityHashCode(this));
        Core.getGlobalContext().register(this);
    }
    @Override
    public void beforeCheckpoint(org.crac.Context<? extends Resource> context) throws Exception {
        System.out.println("Before checkpoint: " + System.identityHashCode(this));
    }
    @Override
    public void afterRestore(org.crac.Context<? extends Resource> context) throws Exception {
        System.out.println("After restore: " + System.identityHashCode(this));
    }
    @Override
    public void handleRequest(final InputStream input, final OutputStream output, final Context context) throws IOException {
        System.out.println("Request handler called: " + System.identityHashCode(this));
    }
}

但是在第一次调用时，可以看到beforeCheckpoint()和afterRestore()都没有被调用：

Constructor called: 91912419
START RequestId: b56b282f-4712-4d18-b300-f6e031c9468a Version: $LATEST
Request handler called: 91912419
END RequestId: b56b282f-4712-4d18-b300-f6e031c9468a
REPORT RequestId: b56b282f-4712-4d18-b300-f6e031c9468a  Duration: 173.24 ms Billed Duration: 174 ms Memory Size: 1024 MB    Max Memory Used: 196 MB Init Duration: 2084.86 ms

在第二次调用时，可以看到同一个对象91912419被重用，但同样没有调用任何一个运行时钩子：

START RequestId: b1ca407e-725c-4c17-93aa-46251f1c65a6 Version: $LATEST
Request handler called: 91912419
END RequestId: b1ca407e-725c-4c17-93aa-46251f1c65a6
REPORT RequestId: b1ca407e-725c-4c17-93aa-46251f1c65a6  Duration: 1.58 ms   Billed Duration: 2 ms   Memory Size: 1024 MB    Max Memory Used: 195 MB