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https://issues.apache.org/jira/browse/MAPREDUCE-7370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17611949#comment-17611949
]
ASF GitHub Bot commented on MAPREDUCE-7370:
-------------------------------------------
aajisaka commented on code in PR #4248:
URL: https://github.com/apache/hadoop/pull/4248#discussion_r985124236
##########
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/MultipleOutputs.java:
##########
@@ -345,6 +356,11 @@ public static boolean getCountersEnabled(JobContext job) {
return job.getConfiguration().getBoolean(COUNTERS_ENABLED, false);
}
+ @VisibleForTesting
+ public synchronized void setRecordWriters(Map<String, RecordWriter<?, ?>>
recordWriters) {
Review Comment:
Would you make it package-private?
##########
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/lib/MultipleOutputs.java:
##########
@@ -527,9 +557,42 @@ public void collect(Object key, Object value) throws
IOException {
* @throws java.io.IOException thrown if any of the MultipleOutput files
* could not be closed properly.
*/
- public void close() throws IOException {
+ public void close() throws IOException, InterruptedException {
Review Comment:
`InterruptedException` is not thrown in this method and should be removed.
This class is annotated `@Public` and the change may cause compile error. Also,
we can remove the below code from the test code.
```
try {
mos.close();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
```
##########
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/lib/MultipleOutputs.java:
##########
@@ -381,6 +406,11 @@ public static boolean getCountersEnabled(JobConf conf) {
private Map<String, RecordWriter> recordWriters;
private boolean countersEnabled;
+ @VisibleForTesting
+ public synchronized void setRecordWriters(Map<String, RecordWriter>
recordWriters) {
Review Comment:
Would you make this method package-private?
> Parallelize MultipleOutputs#close call
> --------------------------------------
>
> Key: MAPREDUCE-7370
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7370
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 3.3.0
> Reporter: Prabhu Joseph
> Assignee: Ashutosh Gupta
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> This call takes more time when there are lot of files to close and there is a
> high latency to close. Parallelize MultipleOutputs#close call to improve the
> speed.
> {code}
> public void close() throws IOException {
> for (RecordWriter writer : recordWriters.values()) {
> writer.close(null);
> }
> }
> {code}
> Idea is from [~ste...@apache.org]
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