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https://issues.apache.org/jira/browse/HIVE-25740?focusedWorklogId=689175&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-689175
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ASF GitHub Bot logged work on HIVE-25740:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 02/Dec/21 10:46
Start Date: 02/Dec/21 10:46
Worklog Time Spent: 10m
Work Description: marton-bod commented on pull request #2817:
URL: https://github.com/apache/hive/pull/2817#issuecomment-984510023
@pvary @klcopp please also note that I've introduced an initial delay
(txnTimeout / 4) to heartbeating:
```
heartbeatExecutor.scheduleAtFixedRate(heartbeater, txnTimeout / 4,
txnTimeout / 2, TimeUnit.MILLISECONDS);
```
This should reduce the likelihood of these race conditions by not even
heartbeating for very short-lived compaction transactions, such as the "Not
enough files in ... to compact" scenarios.
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Issue Time Tracking
-------------------
Worklog Id: (was: 689175)
Time Spent: 2h 50m (was: 2h 40m)
> Handle race condition between compaction txn abort/commit and heartbeater
> -------------------------------------------------------------------------
>
> Key: HIVE-25740
> URL: https://issues.apache.org/jira/browse/HIVE-25740
> Project: Hive
> Issue Type: Bug
> Reporter: Marton Bod
> Assignee: Marton Bod
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> This issue is the following: once the compaction worker finishes,
> commitTxn/abortTxn is invoked first, and the heartbeater thread is only
> interrupted after that. This can lead to race conditions where the txn has
> already been deleted from the backend DB via commit/abort, but the
> concurrently running heartbeater thread still attempts to send a last
> heartbeat after that, but the txn id won't be found in the DB, leading to
> {{{}NoSuchTxnException{}}}.
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