java - How can I prevent Ivy from downloading multiple versions of the same dependency? -

i have ivy.xml file (without ivysettings.xml file) following dependency:

<dependency org="org.freemarker" name="freemarker" rev="2.3.23"/> 

however when resolve ivy dependencies end freemarker-2.3.8.jar , freemarker-2.3.23.jar. causing problem in apache tomcat because 2.3.8.jar taking precedence on 2.3.23.jar , static final int called configuration.version_2_3_23 showing @ run-time unavailable (though available compile time). here full ivy.xml in case helps:

<ivy-module version="2.0">     <info organisation="com.example" module="exampleproject"/>     <configurations defaultconfmapping="default">         <conf name="default"/>         <conf name="java8" extends="default" description="java 8 dependencies"/>         <conf name="eclipse" description="special dependencies in eclipse"/>         <conf name="utest" extends="eclipse" description="unit testing dependencies"/>     </configurations>      <dependencies>         <dependency org="com.amazonaws" name="aws-java-sdk-s3" rev="1.10.6"/>         <dependency org="org.slf4j" name="slf4j-simple" rev="1.7.10" />         <dependency org="org.lesscss" name="lesscss" rev="1.7.0.1.1"/>         <dependency org="com.github.mfornos" name="humanize-slim" rev="1.2.1"/>         <dependency org="com.google.code.gson" name="gson" rev="2.3.1"/>         <dependency org="com.lambdaworks" name="scrypt" rev="1.4.0"/>         <dependency org="commons-cli" name="commons-cli" rev="1.2"/>         <dependency org="commons-codec" name="commons-codec" rev="1.10"/>         <dependency org="commons-fileupload" name="commons-fileupload" rev="1.3.1"/>         <dependency org="joda-time" name="joda-time" rev="2.8.1"/>         <dependency org="mysql" name="mysql-connector-java" rev="5.1.36"/>         <dependency org="org.apache.ant" name="ant" rev="1.9.6"/>         <dependency org="org.apache.commons" name="commons-lang3" rev="3.4"/>         <dependency org="org.apache.httpcomponents" name="httpclient" rev="4.5"/>         <dependency org="org.freemarker" name="freemarker" rev="2.3.23"/>         <dependency org="org.hibernate" name="hibernate-c3p0" rev="4.3.10.final"/>         <dependency org="org.hibernate" name="hibernate-core" rev="4.3.10.final"/>         <dependency org="org.hibernate" name="hibernate-search" rev="4.5.1.final"/>         <dependency org="org.hibernate" name="hibernate-tools" rev="4.3.1.cr1"/>          <dependency org="org.imgscalr" name="imgscalr-lib" rev="4.2"/>         <dependency org="org.jadira.usertype" name="usertype.core" rev="3.1.0.ga"/>         <dependency org="org.jsoup" name="jsoup" rev="1.8.3"/>         <dependency org="org.projectlombok" name="lombok" rev="1.16.6" />         <dependency org="org.tuckey" name="urlrewritefilter" rev="4.0.4"/>     </dependencies> </ivy-module> 

"freemarker-2.3.8.jar" part of "freemarker:freemarker" module , transitive dependency of

<dependency org="org.hibernate" name="hibernate-tools" rev="4.3.1.cr1"/> 

i recommend following fix, telling ivy exclude unwanted module:

<ivy-module version="2.0">     ..     ..         <dependencies>       ..       ..        <exclude org="freemarker" module="freemarker"/>     </dependencies> </ivy-module> 

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to diagnose problem used report task analyse content of each ivy configuration.

<project name="demo" default="resolve" xmlns:ivy="antlib:org.apache.ivy.ant">    <target name="resolve">     <ivy:retrieve pattern="lib/[conf]/[artifact]-[revision](-[classifier]).[ext]"/>     <ivy:report todir="reports" graph="false"/>   </target>  </project>