From 9e42847c5ae72b3472488c1a21baaa4b258708b5 Mon Sep 17 00:00:00 2001
From: Eason Chen <easoneason0905@gmail.com>
Date: Sun, 26 Jul 2026 22:20:45 +0800
Subject: [PATCH 1/2] Reject exponential histogram aggregation views for async
 instruments

---
 .../_internal/metric_reader_storage.py        |  7 +++-
 .../metrics/test_metric_reader_storage.py     | 40 +++++++++++++++++++
 2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/metric_reader_storage.py b/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/metric_reader_storage.py
index 7c409430bf9..6d8e2efa1ba 100644
--- a/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/metric_reader_storage.py
+++ b/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/metric_reader_storage.py
@@ -17,6 +17,7 @@
     Aggregation,
     AggregationTemporality,
     ExplicitBucketHistogramAggregation,
+    ExponentialBucketHistogramAggregation,
     _DropAggregation,
     _ExplicitBucketHistogramAggregation,
     _ExponentialBucketHistogramAggregation,
@@ -293,7 +294,11 @@ def _check_view_instrument_compatibility(
 
         # pylint: disable=protected-access
         if isinstance(instrument, Asynchronous) and isinstance(
-            view._aggregation, ExplicitBucketHistogramAggregation
+            view._aggregation,
+            (
+                ExplicitBucketHistogramAggregation,
+                ExponentialBucketHistogramAggregation,
+            ),
         ):
             _logger.warning(
                 "View %s and instrument %s will produce "
diff --git a/opentelemetry-sdk/tests/metrics/test_metric_reader_storage.py b/opentelemetry-sdk/tests/metrics/test_metric_reader_storage.py
index 281aae92158..81910752eb4 100644
--- a/opentelemetry-sdk/tests/metrics/test_metric_reader_storage.py
+++ b/opentelemetry-sdk/tests/metrics/test_metric_reader_storage.py
@@ -31,6 +31,7 @@
     DefaultAggregation,
     DropAggregation,
     ExplicitBucketHistogramAggregation,
+    ExponentialBucketHistogramAggregation,
     SumAggregation,
     View,
 )
@@ -453,6 +454,45 @@ def test_conflicting_view_configuration(self):
             _DEFAULT_VIEW,
         )
 
+    def test_conflicting_view_configuration_exponential_histogram(self):
+        observable_counter = _ObservableCounter(
+            "observable_counter",
+            Mock(),
+            [Mock()],
+            unit="unit",
+            description="description",
+        )
+        metric_reader_storage = MetricReaderStorage(
+            SdkConfiguration(
+                exemplar_filter=Mock(),
+                resource=Mock(),
+                views=(
+                    View(
+                        instrument_name="observable_counter",
+                        aggregation=ExponentialBucketHistogramAggregation(),
+                    ),
+                ),
+            ),
+            MagicMock(
+                **{
+                    "__getitem__.return_value": AggregationTemporality.CUMULATIVE
+                }
+            ),
+            MagicMock(**{"__getitem__.return_value": DefaultAggregation()}),
+        )
+
+        with self.assertLogs(level=WARNING):
+            metric_reader_storage.consume_measurement(
+                Measurement(1, time_ns(), observable_counter, Context())
+            )
+
+        self.assertIs(
+            metric_reader_storage._instrument_view_instrument_matches[
+                observable_counter
+            ][0]._view,
+            _DEFAULT_VIEW,
+        )
+
     def test_view_instrument_match_conflict_0(self):
         # There is a conflict between views and instruments.
 

From 64ab962a77b164ded6da401c88a88b9d0c26b763 Mon Sep 17 00:00:00 2001
From: Eason Chen <easoneason0905@gmail.com>
Date: Sun, 26 Jul 2026 22:31:07 +0800
Subject: [PATCH 2/2] Add changelog

---
 .changelog/5461.fixed | 2 ++
 1 file changed, 2 insertions(+)
 create mode 100644 .changelog/5461.fixed

diff --git a/.changelog/5461.fixed b/.changelog/5461.fixed
new file mode 100644
index 00000000000..4c6a5896b60
--- /dev/null
+++ b/.changelog/5461.fixed
@@ -0,0 +1,2 @@
+Reject views with `ExponentialBucketHistogramAggregation` for asynchronous
+instruments instead of silently producing no data