[jira] [Resolved] (TWILL-139) ApplicationMaster hangs during start when ZooKeeper SASL authentication is turned on

["Terence Yim (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TWILL-139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Terence Yim resolved TWILL-139.
-------------------------------
    Resolution: Fixed

> ApplicationMaster hangs during start when ZooKeeper SASL authentication is turned on
> ------------------------------------------------------------------------------------
>
>                 Key: TWILL-139
>                 URL: https://issues.apache.org/jira/browse/TWILL-139
>             Project: Apache Twill
>          Issue Type: Bug
>          Components: core, yarn
>    Affects Versions: 0.5.0-incubating, 0.4.1-incubating
>            Reporter: Terence Yim
>            Assignee: Terence Yim
>            Priority: Blocker
>             Fix For: 0.6.0-incubating
>
>
> It is caused by a race condition when one {{ZKClient}} instance is performing the authentication while the {{EmbeddedKafkaServer}} is trying to start and connect to zookeeper.
> Here is the main method to reproduce the issue:
> {noformat}
> public static void main(String[] args) throws Exception {
>   String zkStr = args[0];
>   ZKClientService zkClient = ZKClientService.Builder.of(zkStr).build();
>   EmbeddedKafkaServer kafka = new EmbeddedKafkaServer(generateKafkaConfig(zkStr));
>   zkClient.startAndWait();    // <-- This returns when SyncConnected
>   kafka.startAndWait();        // <-- This call hangs and never return
> }
> {noformat}



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