Broker's first registration may not take effect

[cserwen]

BUG REPORT

1. Please describe the issue you observed:

• What did you do (The steps to reproduce)?
  • restart namesrv .
  • 10s after namesrv starts, send a request to create a topic to one broker
• What is expected to see?
  • namesrv should has routes of all topic
• What did you see instead?
  • Only the routing information of the topic just created

2. Please tell us about your environment:

• OS: linux
• branch: dev

4. Other information (e.g. detailed explanation, logs, related issues, suggestions on how to fix, etc):

• When the client sends a request to create a topic, the broker will register the routing information of the newly created topic to namesrv
• But the broker may not have registered the all routing information to namesrv at the moment.
• The following code will treat the request of the first step as the first registration, so that the first full registration of the broker will not take effect.
  

  rocketmq/namesrv/src/main/java/org/apache/rocketmq/namesrv/routeinfo/RouteInfoManager.java

  Line 155 in cdfa5ce

  boolean registerFirst = false;

• The broker will not be able to complete the full registration until the TopicConfigManager's dataversion is changed.