[
https://issues.apache.org/jira/browse/HIVE-24145?focusedWorklogId=482691&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-482691
]
ASF GitHub Bot logged work on HIVE-24145:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 12/Sep/20 20:12
Start Date: 12/Sep/20 20:12
Worklog Time Spent: 10m
Work Description: rbalamohan commented on a change in pull request #1485:
URL: https://github.com/apache/hive/pull/1485#discussion_r486786544
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/exec/FileSinkOperator.java
##########
@@ -216,29 +216,47 @@ public FSPaths(Path specPath, boolean isMmTable, boolean
isDirectInsert, boolean
}
public void closeWriters(boolean abort) throws HiveException {
+ Exception exception = null;
for (int idx = 0; idx < outWriters.length; idx++) {
if (outWriters[idx] != null) {
try {
outWriters[idx].close(abort);
updateProgress();
} catch (IOException e) {
- throw new HiveException(e);
+ exception = e;
+ LOG.error("Error closing " + outWriters[idx].toString(), e);
+ // continue closing others
}
}
}
- try {
+ for (int i = 0; i < updaters.length; i++) {
+ if (updaters[i] != null) {
+ SerDeStats stats = updaters[i].getStats();
+ // Ignore 0 row files except in case of insert overwrite
+ if (isDirectInsert && (stats.getRowCount() > 0 ||
isInsertOverwrite)) {
+ outPathsCommitted[i] = updaters[i].getUpdatedFilePath();
+ }
+ try {
+ updaters[i].close(abort);
+ } catch (IOException e) {
+ exception = e;
+ LOG.error("Error closing " + updaters[i].toString(), e);
+ // continue closing others
+ }
+ }
+ }
+ // Made an attempt to close all writers.
+ if (exception != null) {
for (int i = 0; i < updaters.length; i++) {
if (updaters[i] != null) {
- SerDeStats stats = updaters[i].getStats();
- // Ignore 0 row files except in case of insert overwrite
- if (isDirectInsert && (stats.getRowCount() > 0 ||
isInsertOverwrite)) {
- outPathsCommitted[i] = updaters[i].getUpdatedFilePath();
+ try {
+ fs.delete(updaters[i].getUpdatedFilePath(), true);
+ } catch (IOException e) {
+ e.printStackTrace();
Review comment:
LOG?
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/SortedDynPartitionOptimizer.java
##########
@@ -284,6 +285,11 @@ public Object process(Node nd, Stack<Node> stack,
NodeProcessorCtx procCtx,
// Create ReduceSink operator
ReduceSinkOperator rsOp = getReduceSinkOp(partitionPositions,
sortPositions, sortOrder, sortNullOrder,
allRSCols, bucketColumns, numBuckets, fsParent,
fsOp.getConf().getWriteType());
+ // we have to make sure not to reorder the child operators as it might
cause weird behavior in the tasks at
+ // the same level. when there is auto stats gather at the same level as
another operation then it might
+ // cause unnecessary preemption. Maintaining the order here to avoid
such preemption and possible errors
Review comment:
Plz add TEZ-3296 as ref if possible.
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Issue Time Tracking
-------------------
Worklog Id: (was: 482691)
Time Spent: 40m (was: 0.5h)
> Fix preemption issues in reducers and file sink operators
> ---------------------------------------------------------
>
> Key: HIVE-24145
> URL: https://issues.apache.org/jira/browse/HIVE-24145
> Project: Hive
> Issue Type: Bug
> Reporter: Ramesh Kumar Thangarajan
> Assignee: Ramesh Kumar Thangarajan
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> There are two issues because of preemption:
> # Reducers are getting reordered as part of optimizations because of which
> more preemption happen
> # Preemption in the middle of writing can cause the file to not close and
> lead to errors when we read the file later
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