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https://issues.apache.org/jira/browse/HIVE-21052?focusedWorklogId=497251&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-497251
]
ASF GitHub Bot logged work on HIVE-21052:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 08/Oct/20 11:29
Start Date: 08/Oct/20 11:29
Worklog Time Spent: 10m
Work Description: deniskuzZ commented on a change in pull request #1548:
URL: https://github.com/apache/hive/pull/1548#discussion_r501646861
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Cleaner.java
##########
@@ -97,9 +100,9 @@ public void run() {
long minOpenTxnId = txnHandler.findMinOpenTxnIdForCleaner();
LOG.info("Cleaning based on min open txn id: " + minOpenTxnId);
List<CompletableFuture> cleanerList = new ArrayList<>();
- for(CompactionInfo compactionInfo : txnHandler.findReadyToClean()) {
+ for (CompactionInfo compactionInfo : txnHandler.findReadyToClean()) {
cleanerList.add(CompletableFuture.runAsync(CompactorUtil.ThrowingRunnable.unchecked(()
->
- clean(compactionInfo, minOpenTxnId)), cleanerExecutor));
+ clean(compactionInfo, minOpenTxnId)), cleanerExecutor));
Review comment:
In original patch Map<String, NonReentrantReadWriteLock> tableLock = new
ConcurrentHashMap<>() was used to prevent a concurrent p-clean (where the
whole table will be scanned). I think, that is resolved by grouping p-cleans
and recording list of writeIds that needs to be removed. @vpnvishv is that
correct?
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Issue Time Tracking
-------------------
Worklog Id: (was: 497251)
Time Spent: 6h 50m (was: 6h 40m)
> 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, 3.1.1
> Reporter: Jaume M
> Assignee: Jaume M
> Priority: Critical
> Labels: pull-request-available
> Attachments: Aborted Txn w_Direct Write.pdf, HIVE-21052.1.patch,
> HIVE-21052.10.patch, HIVE-21052.11.patch, HIVE-21052.12.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,
> HIVE-21052.8.patch, HIVE-21052.9.patch
>
> Time Spent: 6h 50m
> Remaining Estimate: 0h
>
> 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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