From 237318248269528d345b455c57d0214b275311e2 Mon Sep 17 00:00:00 2001
From: Aaron Niskode-Dossett <aniskodedossett@etsy.com>
Date: Wed, 9 Sep 2026 08:04:29 -0500
Subject: [PATCH 1/2] GH-3780: Test ParquetReadOptions without MapReduce

---
 parquet-hadoop-no-mapreduce-test/pom.xml      | 57 +++++++++++++++++++
 ...arquetReadOptionsWithoutMapReduceTest.java | 36 ++++++++++++
 pom.xml                                       |  2 +
 3 files changed, 95 insertions(+)
 create mode 100644 parquet-hadoop-no-mapreduce-test/pom.xml
 create mode 100644 parquet-hadoop-no-mapreduce-test/src/test/java/org/apache/parquet/hadoop/ParquetReadOptionsWithoutMapReduceTest.java

diff --git a/parquet-hadoop-no-mapreduce-test/pom.xml b/parquet-hadoop-no-mapreduce-test/pom.xml
new file mode 100644
index 0000000000..828edba164
--- /dev/null
+++ b/parquet-hadoop-no-mapreduce-test/pom.xml
@@ -0,0 +1,57 @@
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one
+  ~ or more contributor license agreements.  See the NOTICE file
+  ~ distributed with this work for additional information
+  ~ regarding copyright ownership.  The ASF licenses this file
+  ~ to you 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
+  ~
+  ~   http://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.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <parent>
+    <groupId>org.apache.parquet</groupId>
+    <artifactId>parquet</artifactId>
+    <version>1.19.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <!--
+    This downstream module exists only to verify that ParquetReadOptions can be
+    constructed with parquet-hadoop and hadoop-common, without Hadoop MapReduce
+    on the runtime classpath. parquet-hadoop itself cannot provide this test
+    because its own test classpath includes the MapReduce classes it compiles.
+  -->
+  <artifactId>parquet-hadoop-no-mapreduce-test</artifactId>
+  <name>Apache Parquet Hadoop Without MapReduce Test</name>
+
+  <properties>
+    <!-- This module exists only to verify a downstream runtime classpath. -->
+    <maven.deploy.skip>true</maven.deploy.skip>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.apache.parquet</groupId>
+      <artifactId>parquet-hadoop</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.hadoop</groupId>
+      <artifactId>hadoop-common</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/parquet-hadoop-no-mapreduce-test/src/test/java/org/apache/parquet/hadoop/ParquetReadOptionsWithoutMapReduceTest.java b/parquet-hadoop-no-mapreduce-test/src/test/java/org/apache/parquet/hadoop/ParquetReadOptionsWithoutMapReduceTest.java
new file mode 100644
index 0000000000..2c846ddba7
--- /dev/null
+++ b/parquet-hadoop-no-mapreduce-test/src/test/java/org/apache/parquet/hadoop/ParquetReadOptionsWithoutMapReduceTest.java
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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
+ *
+ *   http://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.apache.parquet.hadoop;
+
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+import org.apache.parquet.ParquetReadOptions;
+import org.junit.jupiter.api.Test;
+
+class ParquetReadOptionsWithoutMapReduceTest {
+
+  @Test
+  void buildsReadOptionsWithoutMapReduce() {
+    assertThatThrownBy(() -> Class.forName("org.apache.hadoop.mapreduce.lib.input.FileInputFormat"))
+        .isInstanceOf(ClassNotFoundException.class);
+
+    assertThatCode(() -> ParquetReadOptions.builder().build()).doesNotThrowAnyException();
+  }
+}
diff --git a/pom.xml b/pom.xml
index ec53d3d721..e65ab37f35 100644
--- a/pom.xml
+++ b/pom.xml
@@ -134,6 +134,7 @@
     <module>parquet-format-structures</module>
     <module>parquet-generator</module>
     <module>parquet-hadoop</module>
+    <module>parquet-hadoop-no-mapreduce-test</module>
     <module>parquet-jackson</module>
     <module>parquet-protobuf</module>
     <module>parquet-thrift</module>
@@ -632,6 +633,7 @@
               <excludeModule>parquet-cli</excludeModule>
               <excludeModule>parquet-tools-deprecated</excludeModule>
               <excludeModule>parquet-format-structures</excludeModule>
+              <excludeModule>parquet-hadoop-no-mapreduce-test</excludeModule>
 
               <!-- Excluding the following modules because bundles do not contain any java classes while they still fail the
                 compatibility check because of missing dependencies -->

From 3adf34f3a8dd57676501a1a35e4b1f99380df813 Mon Sep 17 00:00:00 2001
From: Aaron Niskode-Dossett <aniskodedossett@etsy.com>
Date: Wed, 9 Sep 2026 08:14:59 -0500
Subject: [PATCH 2/2] MINOR: Scope no-MapReduce test dependencies

---
 parquet-hadoop-no-mapreduce-test/pom.xml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/parquet-hadoop-no-mapreduce-test/pom.xml b/parquet-hadoop-no-mapreduce-test/pom.xml
index 828edba164..edee804aa5 100644
--- a/parquet-hadoop-no-mapreduce-test/pom.xml
+++ b/parquet-hadoop-no-mapreduce-test/pom.xml
@@ -47,6 +47,7 @@
       <groupId>org.apache.parquet</groupId>
       <artifactId>parquet-hadoop</artifactId>
       <version>${project.version}</version>
+      <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.apache.hadoop</groupId>