[GitHub] [incubator-dubbo] stevenys opened issue #3819: After kill zookeeper, restart consumer, it consume ok and later reconsume fail with no provider mostly but not all the times.

["stevenys (GitHub)" <gi...@apache.org>]

### Environment

* Dubbo version: 2.7
* Operating System version: mac
* Java version: 1.8

### Steps to reproduce this issue

1. provider, consumer, zookeeper all ok
2. kill -9 zookeeper
3. restart consumer

### Expected Result
always consume ok later

### Actual Result
consume ok firstly, then fail with no provider.

First the provider log display retry register ok, then the following warn msg

NettyServerWorker-6-2  WARN transport.AbstractServer:  [DUBBO] All clients has disconnected from /xxx.xxx.xxx.xxx:20881. You can graceful shutdown now., dubbo version: 2.7.0, current host: xxx.xxx.xxx.xxx

DubboServerHandler-xxx.xxx.xxx.xxx:20881-thread-23  INFO dubbo.DubboProtocol:  [DUBBO] disconnected from /xxx.xxx.xxx.xxx:65084

But I don't initiatively close consumer connection, it seems provider closed the connection and zookeeper register info gone.

[ Full content available at: https://github.com/apache/incubator-dubbo/issues/3819 ]
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