lindzh opened a new pull request #208: [ROCKETMQ-336] Wrong format System.out.printf used in mqadmin URL: https://github.com/apache/rocketmq/pull/208 ## What is the purpose of the change When using mqadmin command printmsg to print retry topic msgs,it throw an exception like this: com.alibaba.rocketmq.client.exception.MQClientException: Can not find Message Queue for this ``` topic, %%RETRY%%CID_MERSS_CONSUOUP_UAT See http://rocketmq.apache.org/docs/faq/ for further details. at com.alibaba.rocketmq.client.impl.MQAdminImpl.fetchSubscribeMessageQueues(MQAdminImpl.java:161) at com.alibaba.rocketmq.client.impl.consumer.DefaultMQPullConsumerImpl.fetchSubscribeMessageQueues(DefaultMQPullConsumerImpl.java:136) at com.alibaba.rocketmq.client.consumer.DefaultMQPullConsumer.fetchSubscribeMessageQueues(DefaultMQPullConsumer.java:225) at com.alibaba.rocketmq.tools.command.message.PrintMessageSubCommand.execute(PrintMessageSubCommand.java:120) at com.alibaba.rocketmq.tools.command.MQAdminStartup.main0(MQAdminStartup.java:128) ,. JIRA: https://issues.apache.org/jira/browse/ROCKETMQ-278. ``` This problem has been fixed in https://github.com/apache/rocketmq/pull/168,but it din't fix all. ## Brief changelog fix all system.out.prinf using in rocketmq. ## Verifying this change 1. This change is a trivial rework / code cleanup with unitout test coverage. 2. execute mqadmin printmsg -t %RETRY%CID_MERSS_CONSUOUP_UAT. Follow this checklist to help us incorporate your contribution quickly and easily: - [x] Make sure there is a [JIRA issue](https://issues.apache.org/jira/projects/ROCKETMQ/issues/) filed for the change (usually before you start working on it). Trivial changes like typos do not require a JIRA 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 `[ROCKETMQ-XXX] 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. - [ ] Write necessary unit-test 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. - [x] If this contribution is large, please file an [Apache Individual Contributor License Agreement](http://www.apache.org/licenses/#clas).
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