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https://issues.apache.org/jira/browse/HIVE-25883?focusedWorklogId=716569&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-716569
]
ASF GitHub Bot logged work on HIVE-25883:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 27/Jan/22 17:45
Start Date: 27/Jan/22 17:45
Worklog Time Spent: 10m
Work Description: deniskuzZ commented on a change in pull request #2971:
URL: https://github.com/apache/hive/pull/2971#discussion_r793757325
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Cleaner.java
##########
@@ -434,8 +437,18 @@ private boolean removeFiles(String location,
ValidWriteIdList writeIdList, Compa
return success;
}
- private boolean hasDataBelowWatermark(FileSystem fs, Path path, long
highWatermark) throws IOException {
- FileStatus[] children = fs.listStatus(path);
+ private boolean hasDataBelowWatermark(AcidDirectory acidDir, FileSystem fs,
Path path, long highWatermark)
+ throws IOException {
+ Set<Path> acidPaths = new HashSet<>();
+ for (ParsedDelta delta : acidDir.getCurrentDirectories()) {
+ acidPaths.add(delta.getPath());
+ }
+ if (acidDir.getBaseDirectory() != null) {
+ acidPaths.add(acidDir.getBaseDirectory());
+ }
+ FileStatus[] children = fs.listStatus(path, p -> {
+ return !acidPaths.contains(p);
+ });
for (FileStatus child : children) {
if (isFileBelowWatermark(child, highWatermark)) {
Review comment:
@kgyrtkirk, could you please try the following test case (simulate
legacy behavior when CQ_NEXT_TXN_ID=NULL by commenting out
updateWSCommitIdAndCleanUpMetadata in CompactionTxnHandler):
````
@Test
public void testReady() throws Exception {
String dbName = "default";
String tblName = "trfcp";
String partName = "ds=today";
Table t = newTable(dbName, tblName, true);
Partition p = newPartition(t, "today");
// minor compaction
addBaseFile(t, p, 19L, 19);
addDeltaFile(t, p, 20L, 20L, 1);
addDeltaFile(t, p, 21L, 21L, 1);
addDeltaFile(t, p, 22L, 22L, 1);
burnThroughTransactions(dbName, tblName, 22);
// block cleaner with an open txn
long blockingTxn = openTxn();
CompactionRequest rqst = new CompactionRequest(dbName, tblName,
CompactionType.MINOR);
rqst.setPartitionname(partName);
long ctxnid = compactInTxn(rqst);
addDeltaFile(t, p, 20, 22, 2, ctxnid);
startCleaner();
// make sure cleaner didn't remove anything, and cleaning is still queued
List<Path> paths = getDirectories(conf, t, p);
Assert.assertEquals("Expected 5 files after minor compaction, instead
these files were present " + paths,
5, paths.size());
ShowCompactResponse rsp = txnHandler.showCompact(new
ShowCompactRequest());
Assert.assertEquals("Expected 1 compaction in queue, got: " +
rsp.getCompacts(), 1, rsp.getCompactsSize());
Assert.assertEquals(TxnStore.CLEANING_RESPONSE,
rsp.getCompacts().get(0).getState());
}
````
We cannot simply filter out current and base dirs cleanup of which is
blocked by openTxn. This is breaking the idea implemented in HIVE-24314. If
there is a blocking open txn, retry until it's gone and we could proceed with
cleanup.
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Issue Time Tracking
-------------------
Worklog Id: (was: 716569)
Time Spent: 3h 10m (was: 3h)
> 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: 3h 10m
> 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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