- [ ] I have searched the [issues](https://github.com/apache/incubator-dubbo/issues) of this repository and believe that this is not a duplicate. - [ ] I have checked the [FAQ](https://github.com/apache/incubator-dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.
### Environment * Dubbo version: 2.7.0 * Operating System version: xxx * Java version: xxx ### Steps to reproduce this issue Start dubbo-demo provider. By default the configuration is using zookeeper where user by default will not use zookeeper and go with multicast as provider is running on multicast. 1. xxx 2. xxx 3. xxx Pls. provide [GitHub address] to reproduce this issue. ### Expected Result What do you expected from the above steps？ ### Actual Result What actually happens? If there is an exception, please attach the exception trace: ``` Just put your stack trace here! ``` [ Full content available at: https://github.com/apache/incubator-dubbo/issues/3091 ] This message was relayed via gitbox.apache.org for [email protected]
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