Github user vanzin commented on a diff in the pull request:

    https://github.com/apache/spark/pull/14637#discussion_r75930641
  
    --- Diff: mesos/pom.xml ---
    @@ -0,0 +1,109 @@
    +<?xml version="1.0" encoding="UTF-8"?>
    +<!--
    +  ~ 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";>
    +  <modelVersion>4.0.0</modelVersion>
    +  <parent>
    +    <groupId>org.apache.spark</groupId>
    +    <artifactId>spark-parent_2.11</artifactId>
    +    <version>2.1.0-SNAPSHOT</version>
    +    <relativePath>../pom.xml</relativePath>
    +  </parent>
    +
    +  <artifactId>spark-mesos_2.11</artifactId>
    +  <packaging>jar</packaging>
    +  <name>Spark Project Mesos</name>
    +  <properties>
    +    <sbt.project.name>mesos</sbt.project.name>
    +    <mesos.version>1.0.0</mesos.version>
    +    <mesos.classifier>shaded-protobuf</mesos.classifier>
    +  </properties>
    +
    +  <dependencies>
    +    <dependency>
    +      <groupId>org.apache.spark</groupId>
    +      <artifactId>spark-core_${scala.binary.version}</artifactId>
    +      <version>${project.version}</version>
    +    </dependency>
    +
    +    <dependency>
    +      <groupId>org.apache.spark</groupId>
    +      <artifactId>spark-core_${scala.binary.version}</artifactId>
    +      <version>${project.version}</version>
    +      <type>test-jar</type>
    +      <scope>test</scope>
    +    </dependency>
    +
    +    <dependency>
    +      <groupId>org.apache.mesos</groupId>
    +      <artifactId>mesos</artifactId>
    +      <version>${mesos.version}</version>
    +      <classifier>${mesos.classifier}</classifier>
    +      <exclusions>
    +        <exclusion>
    +          <groupId>com.google.protobuf</groupId>
    +          <artifactId>protobuf-java</artifactId>
    +        </exclusion>
    +      </exclusions>
    +    </dependency>
    +
    +    <dependency>
    --- End diff --
    
    They're shaded because people want to use different versions of guava and 
jetty.
    
    Spark doesn't need to promote them to compile scope because the relocated 
guava / jetty classes are packaged with Spark itself.
    
    I see what they problem you're running into is now. It has nothing to do 
with compile scope, you just need to explicit list the dependencies because the 
mesos code references them directly. So you actually just need to fix the 
comment since you're not promoting anything to compile scope by explicitly 
adding the dependencies (they still inherit the scope from the parent pom, 
which is "provided", and is actually what you want here).


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