/**
* 取消订阅
*/
public void unsubscribe(ClientIdentity clientIdentity) throws CanalServerException {
CanalInstance canalInstance = canalInstances.get(clientIdentity.getDestination());
canalInstance.getMetaManager().unsubscribe(clientIdentity); // 执行一下meta订阅
logger.info("unsubscribe successfully, {}", clientIdentity);
}