[jira] [Commented] (KAFKA-6941) when passing port = 0 to worker, the advertisedPort still is 0 rather than a random port

["Chia-Ping Tsai (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-6941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16488758#comment-16488758 ] 

Chia-Ping Tsai commented on KAFKA-6941:
---------------------------------------

I noticed this issue when building the mini connector cluster. After assigning the zero port to worker, I try to get the random port through RestServer#advertisedUrl. However, it always fail to get a truly random port. 

> when passing port = 0 to worker, the advertisedPort still is 0 rather than a random port
> ----------------------------------------------------------------------------------------
>
>                 Key: KAFKA-6941
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6941
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Chia-Ping Tsai
>            Assignee: Chia-Ping Tsai
>            Priority: Major
>
> {code:java}
> public URI advertisedUrl() {
>     UriBuilder builder = UriBuilder.fromUri(jettyServer.getURI());
>     Integer advertisedPort = config.getInt(WorkerConfig.REST_ADVERTISED_PORT_CONFIG);
>     if (advertisedPort != null)
>         builder.port(advertisedPort);
>     else if (serverConnector != null)
>         builder.port(serverConnector.getPort()); // should call getLocalPort() instead
>     log.info("Advertised URI: {}", builder.build());
>     return builder.build();
> }{code}



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