[jira] [Created] (KAFKA-7113) AdminClient.create has an infinite retry loop bug

["02tmqrmje9 (JIRA)" <ji...@apache.org>]

02tmqrmje9 created KAFKA-7113:
---------------------------------

             Summary: AdminClient.create has an infinite retry loop bug
                 Key: KAFKA-7113
                 URL: https://issues.apache.org/jira/browse/KAFKA-7113
             Project: Kafka
          Issue Type: Bug
            Reporter: 02tmqrmje9


When you try to instantiate an KafkaAdminClient using the factory method AdminClient.create it returns a client while side-effecting with a background thread stuck in a retry loop forever attempting to get broker metadata when brokers are not accessible.

Running the below code:

 
{code:java}
val props = new Properties()
props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:8080)
AdminClient.create(props)
{code}
Will result in an endless loop of the below forever:

 

 
{code:java}
Connection to node -1 could not be established. Broker may not be available
{code}
As create returns an AdminClient value straight away and forks to a background thread there is no way to know if the client instantiated successfully or not and to handle the error case.
 * Calling create ideally should not side affect as it's equivalent to a side-effecting constructor
 * At the least calling create should fatally fail if it can't talk to the brokers so the error case can be handled, i.e so a user can fail fast and propagate errors.

 

 

 

 



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