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https://issues.apache.org/jira/browse/HIVE-23324?focusedWorklogId=461499&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-461499
]
ASF GitHub Bot logged work on HIVE-23324:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 21/Jul/20 09:55
Start Date: 21/Jul/20 09:55
Worklog Time Spent: 10m
Work Description: pvary commented on a change in pull request #1275:
URL: https://github.com/apache/hive/pull/1275#discussion_r457977709
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Cleaner.java
##########
@@ -89,9 +94,12 @@ public void run() {
handle =
txnHandler.getMutexAPI().acquireLock(TxnStore.MUTEX_KEY.Cleaner.name());
startedAt = System.currentTimeMillis();
long minOpenTxnId = txnHandler.findMinOpenTxnIdForCleaner();
+ List<CompletableFuture> cleanerList = new ArrayList<>();
for(CompactionInfo compactionInfo : txnHandler.findReadyToClean()) {
- clean(compactionInfo, minOpenTxnId);
+
cleanerList.add(CompletableFuture.runAsync(ThrowingRunnable.unchecked(() ->
+ clean(compactionInfo, minOpenTxnId)), cleanerExecutor));
}
+ CompletableFuture.allOf(cleanerList.toArray(new
CompletableFuture[0])).join();
Review comment:
What happens if one of the futures throws the exception?
Are the others continue to execute? Will we wait until all of the tasks are
finished one way or another?
We do not want multiple Cleaning tasks running concurrently on the same
partition.
Seeing this the same problem might arise with the Initiator too. What do you
think @deniskuzZ ?
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Issue Time Tracking
-------------------
Worklog Id: (was: 461499)
Time Spent: 40m (was: 0.5h)
> Parallelise compaction directory cleaning process
> -------------------------------------------------
>
> Key: HIVE-23324
> URL: https://issues.apache.org/jira/browse/HIVE-23324
> Project: Hive
> Issue Type: Improvement
> Reporter: Marton Bod
> Assignee: Adesh Kumar Rao
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Initiator processes the various compaction candidates in parallel, so we
> could follow a similar approach in Cleaner where we currently clean the
> directories sequentially.
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