shubhamvishu commented on code in PR #12183:
URL: https://github.com/apache/lucene/pull/12183#discussion_r1325031509
##########
lucene/core/src/java/org/apache/lucene/search/TaskExecutor.java:
##########
@@ -64,4 +68,57 @@ final <T> List<T> invokeAll(Collection<RunnableFuture<T>>
tasks) throws IOExcept
}
return results;
}
+
+ /**
+ * Execute all the tasks provided as an argument concurrently only if it is
a {@link
+ * ThreadPoolExecutor} and the current thread invoking this is not a {@link
ThreadPoolExecutor}
+ * thread, else run all the tasks sequentially, wait for them to complete
and return the obtained
+ * results.
+ *
+ * @param tasks the tasks to execute
+ * @return a list containing the results from the tasks execution
+ * @param <T> the return type of the task execution
+ */
+ public final <T> List<T>
invokeAllWithThreadPoolExecutor(Collection<RunnableFuture<T>> tasks)
+ throws IOException {
+ boolean executeOnCallerThread;
+ long frames;
+ try {
+ frames =
+ StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE)
Review Comment:
@uschindler Indeed!....I discovered this when I tried the other
options(which seems to require no/less privileges?). But this led me to have a
fail-safe approach to not throw exception in this case and fallback to running
these tasks sequentially. Let me know if it makes sense?
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