diff --git a/spring-web/spring-web.gradle b/spring-web/spring-web.gradle
index 1b331f7d1ff..03ef2d51c03 100644
--- a/spring-web/spring-web.gradle
+++ b/spring-web/spring-web.gradle
@@ -66,6 +66,7 @@ dependencies {
 	testImplementation("com.fasterxml.jackson.datatype:jackson-datatype-joda")
 	testImplementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
 	testImplementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+	testImplementation("com.fasterxml.jackson.dataformat:jackson-dataformat-csv")
 	testImplementation("org.apache.tomcat:tomcat-util")
 	testImplementation("org.apache.tomcat.embed:tomcat-embed-core")
 	testImplementation("org.eclipse.jetty:jetty-server")
diff --git a/spring-web/src/main/java/org/springframework/http/codec/json/AbstractJackson2Encoder.java b/spring-web/src/main/java/org/springframework/http/codec/json/AbstractJackson2Encoder.java
index ffb979f27c4..ddff8fea1ea 100644
--- a/spring-web/src/main/java/org/springframework/http/codec/json/AbstractJackson2Encoder.java
+++ b/spring-web/src/main/java/org/springframework/http/codec/json/AbstractJackson2Encoder.java
@@ -169,8 +169,8 @@ public abstract class AbstractJackson2Encoder extends Jackson2CodecSupport imple
 									separator))
 							.doAfterTerminate(() -> {
 								try {
-									byteBuilder.release();
 									generator.close();
+									byteBuilder.release();
 								}
 								catch (IOException ex) {
 									logger.error("Could not close Encoder resources", ex);
diff --git a/spring-web/src/test/java/org/springframework/http/codec/json/JacksonCsvEncoderTests.java b/spring-web/src/test/java/org/springframework/http/codec/json/JacksonCsvEncoderTests.java
new file mode 100644
index 00000000000..e886f1bb359
--- /dev/null
+++ b/spring-web/src/test/java/org/springframework/http/codec/json/JacksonCsvEncoderTests.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2002-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License 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 org.springframework.http.codec.json;
+
+import java.util.Arrays;
+import java.util.Map;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectWriter;
+import com.fasterxml.jackson.dataformat.csv.CsvMapper;
+import org.junit.jupiter.api.Test;
+import reactor.core.publisher.Flux;
+
+import org.springframework.core.ResolvableType;
+import org.springframework.core.testfixture.codec.AbstractEncoderTests;
+import org.springframework.http.MediaType;
+import org.springframework.util.Assert;
+import org.springframework.util.MimeType;
+import org.springframework.web.testfixture.xml.Pojo;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link AbstractJackson2Encoder} for the CSV variant and how resources are managed.
+ * @author Brian Clozel
+ */
+class JacksonCsvEncoderTests extends AbstractEncoderTests<org.springframework.http.codec.json.JacksonCsvEncoderTests.JacksonCsvEncoder> {
+
+	public JacksonCsvEncoderTests() {
+		super(new JacksonCsvEncoder());
+	}
+
+	@Test
+	@Override
+	public void canEncode() throws Exception {
+		ResolvableType pojoType = ResolvableType.forClass(Pojo.class);
+		assertThat(this.encoder.canEncode(pojoType, JacksonCsvEncoder.TEXT_CSV)).isTrue();
+	}
+
+	@Test
+	@Override
+	public void encode() throws Exception {
+		Flux<Object> input = Flux.just(new Pojo("spring", "framework"),
+				new Pojo("spring", "data"),
+				new Pojo("spring", "boot"));
+
+		testEncode(input, Pojo.class, step -> step
+				.consumeNextWith(expectString("bar,foo\nframework,spring\n"))
+				.consumeNextWith(expectString("data,spring\n"))
+				.consumeNextWith(expectString("boot,spring\n"))
+				.verifyComplete());
+	}
+
+	@Test
+	// See gh-30493
+	// this test did not fail directly but logged a NullPointerException dropped by the reactive pipeline
+	void encodeEmptyFlux() {
+		Flux<Object> input = Flux.empty();
+		testEncode(input, Pojo.class, step -> step.verifyComplete());
+	}
+
+	static class JacksonCsvEncoder extends AbstractJackson2Encoder {
+		public static final MediaType TEXT_CSV = new MediaType("text", "csv");
+
+		public JacksonCsvEncoder() {
+			this(CsvMapper.builder().build(), TEXT_CSV);
+		}
+
+		@Override
+		protected byte[] getStreamingMediaTypeSeparator(MimeType mimeType) {
+			// CsvMapper emits newlines
+			return new byte[0];
+		}
+
+		public JacksonCsvEncoder(ObjectMapper mapper, MimeType... mimeTypes) {
+			super(mapper, mimeTypes);
+			Assert.isInstanceOf(CsvMapper.class, mapper);
+			setStreamingMediaTypes(Arrays.asList(TEXT_CSV));
+		}
+
+		@Override
+		protected ObjectWriter customizeWriter(ObjectWriter writer, MimeType mimeType, ResolvableType elementType, Map<String, Object> hints) {
+			CsvMapper mapper = (CsvMapper) getObjectMapper();
+			return writer.with(mapper.schemaFor(elementType.toClass()).withHeader());
+		}
+	}
+}