[
https://issues.apache.org/jira/browse/HIVE-25883?focusedWorklogId=716302&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-716302
]
ASF GitHub Bot logged work on HIVE-25883:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 27/Jan/22 09:38
Start Date: 27/Jan/22 09:38
Worklog Time Spent: 10m
Work Description: klcopp commented on a change in pull request #2971:
URL: https://github.com/apache/hive/pull/2971#discussion_r793418454
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Cleaner.java
##########
@@ -448,15 +461,15 @@ private boolean isFileBelowWatermark(FileStatus child,
long highWatermark) {
Path p = child.getPath();
String fn = p.getName();
if (!child.isDirectory()) {
- return false;
+ return true;
}
if (fn.startsWith(AcidUtils.BASE_PREFIX)) {
ParsedBaseLight b = ParsedBaseLight.parseBase(p);
- return b.getWriteId() < highWatermark;
+ return b.getWriteId() <= highWatermark;
Review comment:
This is good, but should also make sure that this base isn't the
recently compacted base (AcidUtils#isCompactedBase should help).
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Cleaner.java
##########
@@ -448,15 +461,15 @@ private boolean isFileBelowWatermark(FileStatus child,
long highWatermark) {
Path p = child.getPath();
String fn = p.getName();
if (!child.isDirectory()) {
- return false;
+ return true;
}
if (fn.startsWith(AcidUtils.BASE_PREFIX)) {
ParsedBaseLight b = ParsedBaseLight.parseBase(p);
- return b.getWriteId() < highWatermark;
+ return b.getWriteId() <= highWatermark;
}
if (fn.startsWith(AcidUtils.DELTA_PREFIX) ||
fn.startsWith(AcidUtils.DELETE_DELTA_PREFIX)) {
ParsedDeltaLight d = ParsedDeltaLight.parse(p);
- return d.getMaxWriteId() < highWatermark;
+ return d.getMaxWriteId() <= highWatermark;
Review comment:
Same as above: the delta might be the result of the latest compaction
(visibilityTxnId > 0)
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Issue Time Tracking
-------------------
Worklog Id: (was: 716302)
Time Spent: 1h 50m (was: 1h 40m)
> 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 50m
> 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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