ashutoshcipher commented on code in PR #4248:
URL: https://github.com/apache/hadoop/pull/4248#discussion_r956070096
##########
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/lib/MultipleOutputs.java:
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@@ -527,9 +558,41 @@ 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 {
+ int nThreads = conf.getInt(MRConfig.MULTIPLE_OUTPUTS_CLOSE_THREAD_COUNT,
+ MRConfig.DEFAULT_MULTIPLE_OUTPUTS_CLOSE_THREAD_COUNT);
+ AtomicBoolean encounteredException = new AtomicBoolean(false);
+ ThreadFactory threadFactory = new
ThreadFactoryBuilder().setNameFormat("MultipleOutputs-close")
+ .setUncaughtExceptionHandler(
Review Comment:
I understand your concern. I hope below makes sense.
```
ThreadFactory threadFactory = new
ThreadFactoryBuilder().setNameFormat("MultipleOutputs-close")
.setUncaughtExceptionHandler(((t, e) -> {
LOG.error("Thread " + t + " failed unexpectedly", e);
encounteredException.set(true);
})).build();
```
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