From cde921456657c16dba81c6fb9c991b62a826d120 Mon Sep 17 00:00:00 2001
From: Suyi <thonatos@users.noreply.github.com>
Date: Mon, 2 Sep 2019 21:24:47 +0800
Subject: [PATCH] docs: update lf url (#3922)

---
 docs/source/en/advanced/cluster-client.md    | 8 ++++----
 docs/source/zh-cn/advanced/cluster-client.md | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/docs/source/en/advanced/cluster-client.md b/docs/source/en/advanced/cluster-client.md
index 1985eb502e..55cc851e2f 100644
--- a/docs/source/en/advanced/cluster-client.md
+++ b/docs/source/en/advanced/cluster-client.md
@@ -24,8 +24,8 @@ So is there any better way? The answer is: YES! We provide a new type of model t
 
 ## Core Idea
 
-- Inspired by the [Leader/Follower](http://www.cs.wustl.edu/~schmidt/PDF/lf.pdf) model.
-- The client is divided into two roles: 
+- Inspired by the [Leader/Follower](https://www.dre.vanderbilt.edu/~schmidt/PDF/lf.pdf) model.
+- The client is divided into two roles:
   - Leader: Be responsible for maintaining the connection with the remote server, only one Leader for the same type of client.
   - Follower: Delegate specific operations to the Leader. A common way is Subscribe-Model (let the Leader interact with remote server and wait for its return).
 - How to determine who Leader is, who Follower is? There are two modes:
@@ -173,7 +173,7 @@ const Base = require('sdk-base');
 class RegistryClient extends Base {
   constructor(options) {
     super({
-      // Specify a method for asynchronous start 
+      // Specify a method for asynchronous start
       initMethod: 'init',
     });
     this._options = options;
@@ -494,7 +494,7 @@ in conclusion:
 
 Students who are interested may have look at [enhanced multi-process development model](https://github.com/eggjs/egg/issues/322) discussion process.
 
-## The Configuration Items Related to Cluster-Client in the Framework 
+## The Configuration Items Related to Cluster-Client in the Framework
 
 ```js
 /**
diff --git a/docs/source/zh-cn/advanced/cluster-client.md b/docs/source/zh-cn/advanced/cluster-client.md
index ce2cab2856..f168b961d5 100644
--- a/docs/source/zh-cn/advanced/cluster-client.md
+++ b/docs/source/zh-cn/advanced/cluster-client.md
@@ -24,7 +24,7 @@ title: 多进程研发模式增强
 
 ## 核心思想
 
-- 受到 [Leader/Follower](http://www.cs.wustl.edu/~schmidt/PDF/lf.pdf) 模式的启发。
+- 受到 [Leader/Follower](https://www.dre.vanderbilt.edu/~schmidt/PDF/lf.pdf) 模式的启发。
 - 客户端会被区分为两种角色：
   - Leader: 负责和远程服务端维持连接，对于同一类的客户端只有一个 Leader。
   - Follower: 会将具体的操作委托给 Leader，常见的是订阅模型（让 Leader 和远程服务端交互，并等待其返回）。