liuruiyiyang opened a new pull request #1458: Fix issue 1457 URL: https://github.com/apache/rocketmq/pull/1458 ## What is the purpose of the change Fix issue #1457 ## Brief changelog 1. Update all broker config when using -c param in ```mqadmin updateBrokerConfig``` subcommand 2. Watch ```namesrvAddr``` param and make it effective dynamically for name server auto-scaling with a new switch config ```watchNamesrvAddr```. ## Verifying this change Use ```mqadmin updateBrokerConfig -c clusterName -n oldNameServerList -k namesrvAddr -v newNameServerList``` to see if all brokers in the cluster has log ```register broker[0]to name server newAddress:9876 OK``` Follow this checklist to help us incorporate your contribution quickly and easily. Notice, `it would be helpful if you could finish the following 5 checklist(the last one is not necessary)before request the community to review your PR`. - [x] Make sure there is a [Github issue](https://github.com/apache/rocketmq/issues) filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue. - [x] Format the pull request title like `[ISSUE #123] Fix UnknownException when host config not exist`. Each commit in the pull request should have a meaningful subject line and body. - [x] Write a pull request description that is detailed enough to understand what the pull request does, how, and why. - [x] Write necessary unit-test(over 80% coverage) to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in [test module](https://github.com/apache/rocketmq/tree/master/test). - [x] Run `mvn -B clean apache-rat:check findbugs:findbugs checkstyle:checkstyle` to make sure basic checks pass. Run `mvn clean install -DskipITs` to make sure unit-test pass. Run `mvn clean test-compile failsafe:integration-test` to make sure integration-test pass. - [ ] If this contribution is large, please file an [Apache Individual Contributor License Agreement](http://www.apache.org/licenses/#clas).
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