[jira] [Commented] (HIVE-25883) Enhance Compaction Cleaner to skip when there is nothing to do

["Zoltan Haindrich (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-25883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17481814#comment-17481814 ] 

Zoltan Haindrich commented on HIVE-25883:
-----------------------------------------

{code}
  //  aborted txn: 3881
  //  com:8020/warehouse/tablespace/managed/hive/test_835163/base_0003209_v0003877
  //  com:8020/warehouse/tablespace/managed/hive/test_835163/delta_0003561_0003561_000
  //  @,type:MAJOR,enqueueTime:0,start:0,properties:null,runAs:hive,tooManyAborts:false,
  //  hasOldAbort:false,highestWriteId:3309,errorMessage:null
{code}

> Enhance Compaction Cleaner to skip when there is nothing to do
> --------------------------------------------------------------
>
>                 Key: HIVE-25883
>                 URL: https://issues.apache.org/jira/browse/HIVE-25883
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> the cleaner works the following way:
> * it identifies obsolete directories (delta dirs ; which doesn't have open txns)
> * removes them and done
> if there are no obsolete directoris that is attributed to that there might be open txns so the request should be retried later.
> however if for some reason the directory was already cleaned - similarily it has no obsolete directories; and thus the request is retried for forever 



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