[jira] [Issue Comment Deleted] (HIVE-21052) Make sure transactions get cleaned if they are aborted before addPartitions is called

["Eugene Koifman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-21052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eugene Koifman updated HIVE-21052:
----------------------------------
    Comment: was deleted

(was: Compaction (any part of it) never acquires any locks - it runs completely asynchronous from readers/writers.

So it has to ensure not to step on itself.  

 )

> Make sure transactions get cleaned if they are aborted before addPartitions is called
> -------------------------------------------------------------------------------------
>
>                 Key: HIVE-21052
>                 URL: https://issues.apache.org/jira/browse/HIVE-21052
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 3.0.0
>            Reporter: Jaume M
>            Assignee: Jaume M
>            Priority: Critical
>         Attachments: Aborted Txn w_Direct Write.pdf, HIVE-21052.1.patch, HIVE-21052.2.patch, HIVE-21052.3.patch, HIVE-21052.4.patch, HIVE-21052.5.patch, HIVE-21052.6.patch, HIVE-21052.7.patch
>
>
> If the transaction is aborted between openTxn and addPartitions and data has been written on the table the transaction manager will think it's an empty transaction and no cleaning will be done.
> This is currently an issue in the streaming API and in micromanaged tables. As proposed by [~ekoifman] this can be solved by:
> * Writing an entry with a special marker to TXN_COMPONENTS at openTxn and when addPartitions is called remove this entry from TXN_COMPONENTS and add the corresponding partition entry to TXN_COMPONENTS.
> * If the cleaner finds and entry with a special marker in TXN_COMPONENTS that specifies that a transaction was opened and it was aborted it must generate jobs for the worker for every possible partition available.
> cc [~ewohlstadter]



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