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https://issues.apache.org/jira/browse/HIVE-25883?focusedWorklogId=715611&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-715611
]
ASF GitHub Bot logged work on HIVE-25883:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 26/Jan/22 11:40
Start Date: 26/Jan/22 11:40
Worklog Time Spent: 10m
Work Description: kgyrtkirk commented on a change in pull request #2971:
URL: https://github.com/apache/hive/pull/2971#discussion_r792552279
##########
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:
1. I believe that in case there are files in the dir they already should
be in the `obsolete` list; I just wanted to be conservative in this method -
but I think returning true there would be correct as well
2. the `highWatermark` is inclusive; but this method's name is
isBelowWatermark - so it only looks for files which are below the watermark
w.r.t to `delta_1_5` ; I think its not below `5` because it contains data
from `writeId` 5.
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Issue Time Tracking
-------------------
Worklog Id: (was: 715611)
Time Spent: 1h 20m (was: 1h 10m)
> 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: 1h 20m
> 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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