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

["Ray Chiang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-7113?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ray Chiang updated KAFKA-7113:
------------------------------
    Component/s: admin

> 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
>          Components: admin
>            Reporter: 02tmqrmje9
>            Priority: Major
>
> 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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