HADOOP-13692. hadoop-aws should declare explicit dependency on Jackson 2 jars to prevent classpath conflicts. Contributed by Chris Nauroth.

hadoop-tools/hadoop-aws/pom.xml

@@ -285,6 +285,18 @@
       <artifactId>aws-java-sdk-s3</artifactId>
       <scope>compile</scope>
     </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-core</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-databind</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-annotations</artifactId>
+    </dependency>
     <dependency>
       <groupId>joda-time</groupId>
       <artifactId>joda-time</artifactId>