Github user vanzin commented on a diff in the pull request: https://github.com/apache/spark/pull/4435#discussion_r28730899 --- Diff: core/pom.xml --- @@ -220,6 +220,21 @@ <version>3.2.10</version> </dependency> <dependency> + <groupId>com.fasterxml.jackson.module</groupId> + <artifactId>jackson-module-scala_2.10</artifactId> + <version>2.3.1</version> + </dependency> + <dependency> + <groupId>com.sun.jersey</groupId> + <artifactId>jersey-server</artifactId> + <version>1.9</version> + </dependency> + <dependency> + <groupId>org.glassfish.jersey.media</groupId> + <artifactId>jersey-media-json-jackson</artifactId> --- End diff -- Could you double-check that pulling this is not causing different com.fasterxml.jackson libraries to be mixed up? I checked the pom for this artifact and it seems to depend on a different version of jackson than the one Spark pulls. Also, I wonder if it wouldn't be better to do like Yarn and avoid pulling this dependency (which is from a different Jersey version). See: https://github.com/apache/hadoop/blob/branch-2/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/YarnJacksonJaxbJsonProvider.java
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