[jira] [Work logged] (HIVE-25513) Delta metrics collection may cause NPE

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-25513?focusedWorklogId=649233&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-649233 ]

ASF GitHub Bot logged work on HIVE-25513:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 10/Sep/21 14:31
            Start Date: 10/Sep/21 14:31
    Worklog Time Spent: 10m 
      Work Description: klcopp opened a new pull request #2633:
URL: https://github.com/apache/hive/pull/2633


   See HIVE-25513
   
   ### How was this patch tested?
   Unit test


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Issue Time Tracking
-------------------

            Worklog Id:     (was: 649233)
    Remaining Estimate: 0h
            Time Spent: 10m

> Delta metrics collection may cause NPE
> --------------------------------------
>
>                 Key: HIVE-25513
>                 URL: https://issues.apache.org/jira/browse/HIVE-25513
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Karen Coppage
>            Assignee: Karen Coppage
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When collecting metrics about the number of deltas under specific partitions/tables,  information about which partitions/tables are being read is stored in the Configuration object under key delta.files.metrics.metadata. This information is retrieved in DeltaFilesMetricsReporter#mergeDeltaFilesStats when collecting the actual information about the number of deltas. But if the information was never stored for some reason, an NPE will be thrown from DeltaFilesMetricsReporter#mergeDeltaFilesStats.



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