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Posted to dev@rocketmq.apache.org by GitBox <gi...@apache.org> on 2021/08/25 12:27:27 UTC

[GitHub] [rocketmq] KevinBlandy opened a new issue #3293: How should I test if the connection is available?

KevinBlandy opened a new issue #3293:
URL: https://github.com/apache/rocketmq/issues/3293


   
   
   I want to determine at the beginning of the program whether the MQ service is working or not.
   
   I constructed an error address message and called the `start()` method, but no exception was thrown and there was no hint. Everything seems to be fine.
   
   ```java
   import org.apache.rocketmq.client.exception.MQClientException;
   import org.apache.rocketmq.client.producer.DefaultMQProducer;
   
   public class MQTest {
   	
   	public static void main(String[] args) throws MQClientException {
   		
   		DefaultMQProducer producer = new DefaultMQProducer("default");
   		producer.setNamesrvAddr("undefinde:-1");
   		
   		producer.start();		
   		
   	}
   }
   
   ```
   
   I didn't find any other methods like `ping()`, `createConn()` either.
   
   The current solution is to try to send a message to a Topic that does not exist and then determine if the service is available based on the exception message.
   
   But this doesn't seem elegant enough, is there a good solution?
   
   


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[GitHub] [rocketmq] coder-zzzz commented on issue #3293: How should I test if the connection is available?

Posted by GitBox <gi...@apache.org>.
coder-zzzz commented on issue #3293:
URL: https://github.com/apache/rocketmq/issues/3293#issuecomment-906212164


   or you can use -Drocketmq.client.logRoot to change the default client log dir


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[GitHub] [rocketmq] vongosling closed issue #3293: How should I test if the connection is available?

Posted by GitBox <gi...@apache.org>.
vongosling closed issue #3293:
URL: https://github.com/apache/rocketmq/issues/3293


   


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[GitHub] [rocketmq] maixiaohai commented on issue #3293: How should I test if the connection is available?

Posted by GitBox <gi...@apache.org>.
maixiaohai commented on issue #3293:
URL: https://github.com/apache/rocketmq/issues/3293#issuecomment-905479647


   you can check the client log at dir `~/logs/rocketmqlogs/rocketmq_client.log`


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