diff --git a/core/sdk-core/src/main/java/software/amazon/awssdk/core/internal/http/pipeline/stages/RetryableStage.java b/core/sdk-core/src/main/java/software/amazon/awssdk/core/internal/http/pipeline/stages/RetryableStage.java
index a545cb4b088e..7482b0c63f6d 100644
--- a/core/sdk-core/src/main/java/software/amazon/awssdk/core/internal/http/pipeline/stages/RetryableStage.java
+++ b/core/sdk-core/src/main/java/software/amazon/awssdk/core/internal/http/pipeline/stages/RetryableStage.java
@@ -16,6 +16,7 @@
 package software.amazon.awssdk.core.internal.http.pipeline.stages;
 
 import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.time.Duration;
 import java.util.Optional;
 import java.util.concurrent.TimeUnit;
@@ -56,7 +57,7 @@ public Response<OutputT> execute(SdkHttpFullRequest request, RequestExecutionCon
                 Response<OutputT> response = executeRequest(retryableStageHelper, context);
                 retryableStageHelper.recordAttemptSucceeded();
                 return response;
-            } catch (SdkExceptionWithRetryAfterHint | SdkException | IOException e) {
+            } catch (SdkExceptionWithRetryAfterHint | SdkException | IOException | UncheckedIOException e) {
                 Throwable throwable = e;
                 if (e instanceof SdkExceptionWithRetryAfterHint) {
                     SdkExceptionWithRetryAfterHint wrapper = (SdkExceptionWithRetryAfterHint) e;
diff --git a/services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/internal/converter/ConverterUtils.java b/services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/internal/converter/ConverterUtils.java
index 0f6f20583187..663a03249cb2 100644
--- a/services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/internal/converter/ConverterUtils.java
+++ b/services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/internal/converter/ConverterUtils.java
@@ -36,18 +36,26 @@ private ConverterUtils() {
 
     /**
      * Validates that a given Double input is a valid double supported by {@link DoubleAttributeConverter}.
+     * Null values are accepted (null will be stored as NULL in DynamoDB and round-trips correctly).
      * @param input
      */
     public static void validateDouble(Double input) {
+        if (input == null) {
+            return;
+        }
         Validate.isTrue(!Double.isNaN(input), "NaN is not supported by the default converters.");
         Validate.isTrue(Double.isFinite(input), "Infinite numbers are not supported by the default converters.");
     }
 
     /**
-     * Validates that a given Float input is a valid double supported by {@link FloatAttributeConverter}.
+     * Validates that a given Float input is a valid float supported by {@link FloatAttributeConverter}.
+     * Null values are accepted (null will be stored as NULL in DynamoDB and round-trips correctly).
      * @param input
      */
     public static void validateFloat(Float input) {
+        if (input == null) {
+            return;
+        }
         Validate.isTrue(!Float.isNaN(input), "NaN is not supported by the default converters.");
         Validate.isTrue(Float.isFinite(input), "Infinite numbers are not supported by the default converters.");
     }
diff --git a/services-custom/dynamodb-enhanced/src/test/java/software/amazon/awssdk/enhanced/dynamodb/internal/converter/ConverterUtilsTest.java b/services-custom/dynamodb-enhanced/src/test/java/software/amazon/awssdk/enhanced/dynamodb/internal/converter/ConverterUtilsTest.java
new file mode 100644
index 000000000000..901d1ff11fd2
--- /dev/null
+++ b/services-custom/dynamodb-enhanced/src/test/java/software/amazon/awssdk/enhanced/dynamodb/internal/converter/ConverterUtilsTest.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package software.amazon.awssdk.enhanced.dynamodb.internal.converter;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class ConverterUtilsTest {
+
+    @Test
+    void validateDouble_nullDoesNotThrow() {
+        assertThatCode(() -> ConverterUtils.validateDouble(null))
+            .doesNotThrow();
+    }
+
+    @Test
+    void validateDouble_finiteValueDoesNotThrow() {
+        assertThatCode(() -> ConverterUtils.validateDouble(3.14))
+            .doesNotThrow();
+    }
+
+    @Test
+    void validateDouble_nanThrows() {
+        assertThatThrownBy(() -> ConverterUtils.validateDouble(Double.NaN))
+            .isInstanceOf(IllegalArgumentException.class)
+            .hasMessageContaining("NaN");
+    }
+
+    @Test
+    void validateDouble_infiniteThrows() {
+        assertThatThrownBy(() -> ConverterUtils.validateDouble(Double.POSITIVE_INFINITY))
+            .isInstanceOf(IllegalArgumentException.class)
+            .hasMessageContaining("Infinite");
+    }
+
+    @Test
+    void validateFloat_nullDoesNotThrow() {
+        assertThatCode(() -> ConverterUtils.validateFloat(null))
+            .doesNotThrow();
+    }
+
+    @Test
+    void validateFloat_nanThrows() {
+        assertThatThrownBy(() -> ConverterUtils.validateFloat(Float.NaN))
+            .isInstanceOf(IllegalArgumentException.class)
+            .hasMessageContaining("NaN");
+    }
+}