title: java 9 module reads package X from A and B
body: <p>I am trying to use spring boot with java 9 and gradle.
  I am unable to run my simple code, I get the below mentioned error :-</p>
  
  <pre><code>Information:java: Errors occurred while compiling module 'Java9Gradle_main'
  Information:javac 9-ea was used to compile java sources
  Information:6/9/2017 10:40 PM - Compilation completed with 65 errors and 0 warnings in 15s 200ms
  Error:java: module  reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module  reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.starter.web reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.starter.web reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.autoconfigure reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.autoconfigure reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.starter.logging reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.starter.logging reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.core reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.core reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module snakeyaml reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module snakeyaml reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.starter.tomcat reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.starter.tomcat reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module hibernate.validator reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module hibernate.validator reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module jackson.databind reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module jackson.databind reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.web reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.web reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.webmvc reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.webmvc reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.context reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.context reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module logback.classic reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module logback.classic reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module jcl.over.slf4j reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module jcl.over.slf4j reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module jul.to.slf4j reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module jul.to.slf4j reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module log4j.over.slf4j reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module log4j.over.slf4j reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module commons.logging reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module commons.logging reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module tomcat.embed.core reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module tomcat.embed.core reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module tomcat.embed.el reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module tomcat.embed.el reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module tomcat.embed.websocket reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module tomcat.embed.websocket reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module validation.api reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module validation.api reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module jboss.logging reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module jboss.logging reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module classmate reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module classmate reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module jackson.annotations reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module jackson.annotations reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module jackson.core reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module jackson.core reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.aop reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.aop reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.beans reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.beans reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.expression reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.expression reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module logback.core reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module logback.core reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module slf4j.api reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module slf4j.api reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.starter reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot.starter reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  Error:java: module spring.boot reads package org.apache.commons.logging.impl from both jcl.over.slf4j and commons.logging
  D:\project\Java9Gradle\src\main\java\module-info.java
  Error:(1, 1) java: module Java9Gradle.main reads package org.apache.commons.logging from both jcl.over.slf4j and commons.logging
  </code></pre>
  
  <p>My dependencies file and the module-info.java file are very straight forward.</p>
  
  <pre><code>module Java9Gradle.main {
      requires spring.boot;
  }
  
  
  group 'Java9Gradle'
  version '1.0-SNAPSHOT'
  
  apply plugin: 'java'
  
  sourceCompatibility = 1.9
  
  repositories {
      mavenCentral()
  }
  
  dependencies {
      // https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter
      compile group: 'org.springframework.boot', name: 'spring-boot-starter', version: '1.5.3.RELEASE'
      // https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web
      compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '1.5.3.RELEASE'
      testCompile group: 'junit', name: 'junit', version: '4.12'
  }
  </code></pre>
  
  <p>Can someone please help??</p>
  
  <p>Thanks,</p>
  
  <p>Amar</p>