[jira] [Resolved] (NIFI-13722) Kerberos ticket renewal issue due static thread pool in Iceberg library

["Peter Turcsanyi (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-13722?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Peter Turcsanyi resolved NIFI-13722.
------------------------------------
    Fix Version/s: 2.0.0-M5
       Resolution: Fixed

> Kerberos ticket renewal issue due static thread pool in Iceberg library
> -----------------------------------------------------------------------
>
>                 Key: NIFI-13722
>                 URL: https://issues.apache.org/jira/browse/NIFI-13722
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Mark Bathori
>            Assignee: Mark Bathori
>            Priority: Major
>             Fix For: 2.0.0-M5
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> There is a static worker Thread Pool in Iceberg which is used in multiple parts of the library:
> https://github.com/apache/iceberg/blob/main/core/src/main/java/org/apache/iceberg/util/ThreadPools.java#L45
>  
> When the PutIceberg processor is started for the first time then this Thread Pool will be initialized with the initial Kerberos user and the processor will work properly until it is not restarted. When restart happens then a new Kerberos user will be initialized but the Thread Pool will still reference to the original Kerberos user so when the Kerberos ticket expires for the first user then it won't be able to renew it. 
> Same issue happens when multiple processors are using the same classloader and the processor which initialized the Thread Pool is stopped then the other processors will start to fail.



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