private void doShutdown() {
        if (this.node != null) {
            this.node = null;
        }
        if (this.fsm != null) {
            this.fsm.onShutdown();
        }
    }
Closure runs with an error.
@author boyan (boyan@alibaba-inc.com)

2018-Apr-04 2:20:31 PM
jraft-core/src/main/java/com/alipay/sofa/jraft/core/FSMCallerImpl.java