cnauroth commented on code in PR #4248:
URL: https://github.com/apache/hadoop/pull/4248#discussion_r904365716
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hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/output/MultipleOutputs.java:
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@@ -570,8 +570,14 @@ public void setStatus(String status) {
*/
@SuppressWarnings("unchecked")
public void close() throws IOException, InterruptedException {
- for (RecordWriter writer : recordWriters.values()) {
- writer.close(context);
- }
+ recordWriters.values().parallelStream().forEach(writer -> {
Review Comment:
Additionally, if we agree with my assertion that it's important to preserve
the error contract, then it would be good to have a unit test that fakes an
`IOException` during `close()` and asserts that it propagates.
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