[jira] [Resolved] (HDFS-17270) RBF: Fix ZKDelegationTokenSecretManagerImpl use closed zookeeper client to get token in some case

["Xiaoqiao He (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-17270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiaoqiao He resolved HDFS-17270.
--------------------------------
    Fix Version/s: 3.4.0
     Hadoop Flags: Reviewed
       Resolution: Fixed

> RBF: Fix ZKDelegationTokenSecretManagerImpl use closed zookeeper client  to get token in some case
> --------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-17270
>                 URL: https://issues.apache.org/jira/browse/HDFS-17270
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: lei w
>            Assignee: lei w
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.4.0
>
>         Attachments: CuratorFrameworkException
>
>
> Now, we use CuratorFramework to simplifies using ZooKeeper in ZKDelegationTokenSecretManagerImpl and we always hold the same zookeeperClient after initialization ZKDelegationTokenSecretManagerImpl. But in some cases like network problem , CuratorFramework may close current zookeeperClient and create new one. In this case , we will use  a zkclient which has been closed  to get token. We encountered this situation in our cluster，exception information in attachment.



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