saxenapranav commented on code in PR #6617:
URL: https://github.com/apache/hadoop/pull/6617#discussion_r1567063343
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/functional/FutureIO.java:
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@@ -114,6 +117,75 @@ public static <T> T awaitFuture(final Future<T> future,
}
}
+ /**
+ * Evaluates a collection of futures and returns their results as a list.
+ * <p>
+ * This method blocks until all futures in the collection have completed.
+ * If any future throws an exception during its execution, this method
+ * extracts and rethrows that exception.
+ * </p>
+ *
+ * @param collection collection of futures to be evaluated
+ * @param <T> type of the result.
+ * @return the list of future's result, if all went well.
+ * @throws InterruptedIOException future was interrupted
+ * @throws IOException if something went wrong
+ * @throws RuntimeException any nested RTE thrown
+ */
+ public static <T> List<T> awaitFuture(final Collection<Future<T>> collection)
+ throws InterruptedIOException, IOException, RuntimeException {
+ List<T> results = new ArrayList<>();
+ try {
+ for (Future<T> future : collection) {
+ results.add(future.get());
+ }
+ return results;
+ } catch (InterruptedException e) {
+ throw (InterruptedIOException) new InterruptedIOException(e.toString())
+ .initCause(e);
+ } catch (ExecutionException e) {
+ return raiseInnerCause(e);
Review Comment:
Added error logs.
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