jihoonson commented on a change in pull request #10076:
URL: https://github.com/apache/druid/pull/10076#discussion_r445696870
##########
File path:
core/src/main/java/org/apache/druid/java/util/common/guava/ParallelMergeCombiningSequence.java
##########
@@ -1350,4 +1363,24 @@ long getTotalCpuTimeNanos()
return totalCpuTimeNanos;
}
}
+
+ private static <T> void closeAllCursors(final
PriorityQueue<BatchedResultsCursor<T>> pQueue)
+ {
+ Closer closer = Closer.create();
+ while (!pQueue.isEmpty()) {
+ final BatchedResultsCursor<T> yielder = pQueue.poll();
+ if (yielder != null) {
+ // Note: yielder can be null if our comparator threw an exception
during queue.add.
+ closer.register(yielder);
Review comment:
nit: `Closer.register()` has null check. You can use `registerAll()`
instead.
##########
File path:
core/src/main/java/org/apache/druid/java/util/common/guava/ParallelMergeCombiningSequence.java
##########
@@ -1036,11 +1047,13 @@ public boolean isReleasable()
@Override
public void close()
{
- try {
- yielder.close();
- }
- catch (IOException e) {
- throw new RuntimeException("Failed to close yielder", e);
+ if (yielder != null) {
+ try {
+ yielder.close();
+ }
+ catch (IOException e) {
+ throw new RuntimeException("Failed to close yielder", e);
Review comment:
It seems the exception will be eventually handled by `CloseQuietly`.
##########
File path:
core/src/main/java/org/apache/druid/java/util/common/guava/ParallelMergeCombiningSequence.java
##########
@@ -1350,4 +1363,24 @@ long getTotalCpuTimeNanos()
return totalCpuTimeNanos;
}
}
+
+ private static <T> void closeAllCursors(final
PriorityQueue<BatchedResultsCursor<T>> pQueue)
+ {
+ Closer closer = Closer.create();
+ while (!pQueue.isEmpty()) {
+ final BatchedResultsCursor<T> yielder = pQueue.poll();
+ if (yielder != null) {
+ // Note: yielder can be null if our comparator threw an exception
during queue.add.
+ closer.register(yielder);
+ }
+ }
+ CloseQuietly.close(closer);
+ }
+
+ private static <T> void closeAllCursors(final List<BatchedResultsCursor<T>>
list)
Review comment:
You can merge these methods if you use `registerAll()` above.
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