yihua commented on code in PR #9395:
URL: https://github.com/apache/hudi/pull/9395#discussion_r1326688166
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hudi-common/src/main/java/org/apache/hudi/common/engine/HoodieEngineContext.java:
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@@ -105,4 +105,12 @@ public abstract <I, K, V> List<V> reduceByKey(
public abstract void cancelJob(String jobId);
public abstract void cancelAllJobs();
+
+ public <T> Stream<T> stream(List<T> data, Integer parallelism) {
+ return stream(stream(data.stream(), data.size()), parallelism);
+ }
+
+ public <T> Stream<T> stream(Stream<T> data, Integer parallelism) {
+ return parallelism == null || parallelism >
Runtime.getRuntime().availableProcessors() ? data : data.parallel();
Review Comment:
So if `parallelism > Runtime.getRuntime().availableProcessors()`, the `data`
is not parallelized at all, as Java's `data.stream()` is sequential by default.
Also to @stream2000 's point, before this PR, the parallelism of `map` is
already limited by `Runtime.getRuntime().availableProcessors()`. Does that
still cause OOM? Is OOM from somewhere else?
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