Cannot get rid of nuget warning NU5128 about missing dependency group - visual-studio

[Env: nuget.exe 5.9.1.11, VS Pro 2019 16.9.6, W10 x64 1909]
I am having trouble configuring the dependencies section of my .nuspec file so nuget generates a package which correctly contains the Dependency for .NET Framework 4.7.2. I consistently get the warning
WARNING: NU5128: Some target frameworks declared in the dependencies group of the nuspec and the
lib/ref folder do not have exact matches in the other location. Consult the list of actions below:
- Add a dependency group for .NETFramework4.7.2 to the nuspec
when I run the nuget pack command. In the .nupkg archive, there are lib\net472\MyLib.dll and lib\net472\MyLib.xml files generated by nuget. (I am running nuget in the VS project directory which contains a .csproj file and my .nuspec file.) Here are the different configurations of the dependencies section that I have tried (my library does have a dependency on the MathNet.Numerics NuGet package):
<dependencies>
<group targetFramework=".NETFramework4.7.2" />
</dependencies>
&
<dependencies>
<group targetFramework=".NETFramework4.7.2" />
<group>
<dependency id="MathNet.Numerics" version="4.15.0" />
</group>
</dependencies>
&
<dependencies>
<group>
<dependency id="MathNet.Numerics" version="4.15.0" />
</group>
<group targetFramework=".NETFramework4.7.2" />
</dependencies>
&
<dependencies>
<group>
<dependency id="MathNet.Numerics" version="4.15.0" />
</group>
<group targetFramework="net472" />
</dependencies>
&
<dependencies>
<group targetFramework="net472" />
<group>
<dependency id="MathNet.Numerics" version="4.15.0" />
</group>
</dependencies>
&
<dependencies>
<group targetFramework="net472" />
</dependencies>
&
<dependencies>
<group targetFramework="net472">
<dependency id="MathNet.Numerics" version="4.15.0" />
</group>
</dependencies>
&
<dependencies>
<group targetFramework=".NETFramework4.7.2">
<dependency id="MathNet.Numerics" version="4.15.0" />
</group>
</dependencies>
& no <dependencies></dependencies> section as well.

Related

Relationship between .iml file and pom.xml file

Each time I create a Maven project, there is a .iml file along with a pom.xml file.
What exactly is their relationship?
The pom.xml is used by maven to resolve your project's dependencies, which plugins to execute and a lot of other things. From the maven website:
A Project Object Model or POM is the fundamental unit of work in Maven. It is an XML file that contains information about the project and configuration details used by Maven to build the project.
The .iml file on the other hand is part of IntelliJ's own project structure. The short version is that it declares the libraries (e.g. jars) that are visible only to the module, and not the rest of the project or other projects. It's an xml file containing a library entry for each artifact declared in your pom.xml, along with its scope (e.g. TEST or COMPILE). For example:
<?xml version="1.0" encoding="UTF-8"?>
<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
<component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
<output url="file://$MODULE_DIR$/target/classes" />
<output-test url="file://$MODULE_DIR$/target/test-classes" />
<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
<sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
<excludeFolder url="file://$MODULE_DIR$/target" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="library" scope="COMPILE" name="Maven: com.google.guava:guava:18.0" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-library:1.3" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
</component>
</module>
I assume IntelliJ keeps its own file format so it can read the project faster, regardless of which build system the project is using (e.g. maven vs. gradle).
IntelliJ idea doesn't understand the maven project model (POM.xml) itself. When creating or importing maven project in idea. It also creating its own project structure, maven dependencies , module details etc etc.. basically required project metadata in the format it can understand and use it internally for it actions. These metadata stored in .iml file and .idea project directory.
Main advantage of keeping it's own structure would provide capacity to run faster and manage project efficiently. I hope this give some explanation on the relationship between these two files.
Sample pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>
<groupId>test</groupId>
<artifactId>test</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<version>2.5.2</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.jmock</groupId>
<artifactId>jmock</artifactId>
<version>${jmock.version}</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.jmock</groupId>
<artifactId>jmock-junit4</artifactId>
<version>${jmock.version}</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junitperf</groupId>
<artifactId>junitperf</artifactId>
<version>1.8</version>
</dependency>
</dependencies>
<properties>
<jmock.version>2.5.1</jmock.version>
<junit.version>4.6</junit.version>
<log4j.version>1.2.14</log4j.version>
<org.slf4j.version>1.5.2</org.slf4j.version>
</properties>
</project>
Relavent IDEA .iml file
<?xml version="1.0" encoding="UTF-8"?>
<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
<component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
<output url="file://$MODULE_DIR$/target/classes" />
<output-test url="file://$MODULE_DIR$/target/test-classes" />
<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
<sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
<sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
<excludeFolder url="file://$MODULE_DIR$/target" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="library" name="Maven: log4j:log4j:1.2.14" level="project" />
<orderEntry type="library" name="Maven: org.slf4j:slf4j-log4j12:1.5.2" level="project" />
<orderEntry type="library" name="Maven: org.slf4j:slf4j-api:1.5.2" level="project" />
<orderEntry type="library" name="Maven: org.easymock:easymock:2.5.2" level="project" />
<orderEntry type="library" name="Maven: org.jmock:jmock:2.5.1" level="project" />
<orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
<orderEntry type="library" name="Maven: org.hamcrest:hamcrest-library:1.1" level="project" />
<orderEntry type="library" name="Maven: org.jmock:jmock-junit4:2.5.1" level="project" />
<orderEntry type="library" name="Maven: junit:junit-dep:4.4" level="project" />
<orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.6" level="project" />
<orderEntry type="library" name="Maven: junitperf:junitperf:1.8" level="project" />
</component>
</module>
The .iml file is generated using the pom.xml.
When you open a project in IntelliJ for the first time, IntelliJ downloads all the required dependencies using the pom.xml as reference. There is a one-way sync between the pom.xml and the .iml file.
When you try to run the project, the .iml file and .idea directory are created. These files and directories allow IntelliJ to run faster.

Spring Boot uber jar packaging classes to root instead of BOOT-INF/classes

Hi Spring Boot Experts -
I am trying to create a spring boot uber jar that needs to be deployed to a apache storm cluster. But, the catch is that Storm is expecting all the class files in the root of the jar while the packaged app files are under "BOOT-INF/classes" when packaged using the "spring-boot-maven-plugin".
Is there a way I can have my app classes packaged directly under the root instead of "BOOT-INF/classes"?
I tried using the "maven-assembly-plugin" with the "spring-boot-maven-plugin" as shown below which creates the Uber jar with all the class files from the dependency jars packaged at the root of the uber jar, but the app classes are still at BOOT-INF/classes.
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.apache.storm</groupId>
<artifactId>storm-core</artifactId>
</exclude>
</excludes>
<requiresUnpack>
<dependency>
<groupId>com.myorg</groupId>
<artifactId>my-app-artifact</artifactId> <!-- This does not help! :( -->
</dependency>
</requiresUnpack>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.4</version>
<configuration>
<appendAssemblyId>false</appendAssemblyId>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
So, for my future self or for anyone who is trying to find an answer for a similar question. Here are the different things that I realized during my research for this -
Storm wants an executable java jar file
Spring Boot provides a custom jar packaging. While it confirms with java jar packaging, Spring Boot loads the classes from the BOOT-INF/classes
So, to make a Spring Boot jar work on the storm cluster while behaving as Spring Boot - we would need to create a copy of all the classes from BOOT-INF/classes to the root of the jar file.
Is this possible? and the answer is yes.
Using the approach describe here, I was able to create a Spring Boot jar with the BOOT-INF/classes copied to the root of the Spring Boot jar. This approach requires ant build.xml, ivy settings and an ivy.xml as shown below. (disclaimer: config tested only till packaging on not on the storm cluster)
Since we are able to create a Spring Boot Jar hacked with classes at the root -
Should we do it? NO.
Here are the reasons -
Spring strongly advises not taking this approach to not end up with unwanted class overwrite and class versioning issues for classes with same names across jar files and with different versions.
Spring Boot Jar packaging is not a format intended for using as a dependency jar. Read the first line here. Hence for dependency use cases, you need to stick with your plain old java modules. Spring Boot is for more of standalone executables or for deployment on containers like tomcat.
Good luck!
build.xml
<project
xmlns:ivy="antlib:org.apache.ivy.ant"
xmlns:spring-boot="antlib:org.springframework.boot.ant"
name="spring-boot-sample-ant"
default="build">
<description>
Sample ANT build script for a Spring Boot executable JAR project. Uses ivy for
dependency management and spring-boot-antlib for additional tasks. Run with
'$ ant -lib ivy-2.2.jar spring-boot-antlib.jar' (substitute the location of your
actual jars). Run with '$ java -jar target/*.jar'.
</description>
<property name="spring-boot.version" value="1.4.2.RELEASE" />
<property name="lib.dir" location="${basedir}/target/lib" />
<property name="start-class" value="com.my.main.class" />
<target name="resolve" description="--> retrieve dependencies with ivy">
<ivy:retrieve pattern="${lib.dir}/[conf]/[artifact]-[type]-[revision].[ext]" />
</target>
<target name="classpaths" depends="resolve">
<path id="compile.classpath">
<fileset dir="${lib.dir}/compile" includes="*.jar" />
</path>
</target>
<target name="init" depends="classpaths">
<mkdir dir="target/classes" />
</target>
<target name="compile" depends="init" description="compile">
<javac srcdir="src/main/java" destdir="target/classes" classpathref="compile.classpath" />
</target>
<target name="clean" description="cleans all created files/dirs">
<delete dir="target" />
</target>
<target name="build" depends="compile">
<spring-boot:exejar destfile="target/${ant.project.name}-${spring-boot.version}.jar" classes="target/classes">
<spring-boot:lib>
<fileset dir="${lib.dir}/runtime" />
</spring-boot:lib>
</spring-boot:exejar>
</target>
<target name="unjar_dependencies" depends="compile">
<unzip dest="target/classes">
<fileset dir="${lib.dir}/compile">
<include name="my-app-common-0.1-SNAPSHOT.jar" />
</fileset>
</unzip>
</target>
<!-- Manual equivalent of the build target -->
<target name="manual" depends="compile, unjar_dependencies">
<jar destfile="target/manual/${ant.project.name}-${spring-boot.version}.jar" compress="false">
<mappedresources>
<fileset dir="target/classes" />
<globmapper from="*" to="BOOT-INF/classes/*"/>
</mappedresources>
<mappedresources> <!-- **** this mapped resources block does what I was looking for **** -->
<fileset dir="target/classes" />
<globmapper from="*" to="/*"/>
</mappedresources>
<mappedresources>
<fileset dir="src/main/resources" erroronmissingdir="false"/>
<globmapper from="*" to="BOOT-INF/classes/*"/>
</mappedresources>
<mappedresources>
<fileset dir="${lib.dir}/runtime" />
<globmapper from="*" to="BOOT-INF/lib/*"/>
</mappedresources>
<zipfileset src="${lib.dir}/loader/spring-boot-loader-jar-${spring-boot.version}.jar" />
<manifest>
<attribute name="Main-Class" value="org.springframework.boot.loader.JarLauncher" />
<attribute name="Start-Class" value="${start-class}" />
</manifest>
</jar>
</target>
</project>
ivysettings.xml
<ivysettings>
<settings defaultResolver="chain" />
<resolvers>
<chain name="chain" returnFirst="true">
<!-- NOTE: You should declare only repositories that you need here -->
<filesystem name="local" local="true" m2compatible="true">
<artifact pattern="${user.home}/.m2/repository/[organisation]/[module]/[revision]/[module]-[revision].[ext]" />
<ivy pattern="${user.home}/.m2/repository/[organisation]/[module]/[revision]/[module]-[revision].pom" />
</filesystem>
<ibiblio name="ibiblio" m2compatible="true" />
<ibiblio name="spring-milestones" m2compatible="true" root="http://repo.spring.io/release" />
<ibiblio name="spring-milestones" m2compatible="true" root="http://repo.spring.io/milestone" />
<ibiblio name="spring-snapshots" m2compatible="true" root="http://repo.spring.io/snapshot" />
</chain>
</resolvers>
</ivysettings>
ivy.xml
<ivy-module version="2.0">
<info organisation="org.springframework.boot" module="spring-boot-sample-ant" />
<configurations>
<conf name="compile" description="everything needed to compile this module" />
<conf name="runtime" extends="compile" description="everything needed to run this module" />
<conf name="loader" description="Spring Boot loader used when manually building an executable archive" />
</configurations>
<dependencies>
<dependency org="org.springframework.boot" name="spring-boot-starter" rev="${spring-boot.version}" conf="compile">
<exclude org="ch.qos.logback" name="logback-classic"/>
</dependency>
<dependency org="org.springframework.boot" name="spring-boot-loader" rev="${spring-boot.version}" conf="loader->default" />
<dependency org="org.apache.storm" name="storm-core" rev="1.0.2">
<exclude org="org.apache.logging.log4j" name="log4j-slf4j-impl"/>
<exclude org="org.apache.logging.log4j" name="log4j-core"/>
</dependency>
<dependency org="com.mycompany" name="app-common" rev="0.1-SNAPSHOT"/>
<dependency org="org.apache.storm" name="storm-kafka" rev="1.0.2"/>
<dependency org="org.apache.kafka" name="kafka_2.10" rev="0.10.1.0"/>
<dependency org="org.apache.kafka" name="kafka_2.10" rev="0.10.1.0"/>
<dependency org="org.apache.httpcomponents" name="httpcomponents-client" rev="4.5.2"/>
<dependency org="org.eclipse.paho" name="org.eclipse.paho.client.mqttv3" rev="1.1.0"/>
<dependency org="com.amazonaws" name="aws-java-sdk-s3" rev="1.11.53"/>
<dependency org="com.jcraft" name="jsch" rev="0.1.54"/>
<dependency org="io.netty" name="netty-handler" rev="3.7.0.Final"/>
</dependencies>
</ivy-module>
Is there a way I can have my app classes packaged directly under the root instead of "BOOT-INF/classes"?
Yes, you just need to use Spring Boot 1.3. Back to maven... in your pom.xml if you declare your parent like this:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
</parent>
then your classes (and other files) will be placed at the root level. This is the "old way" for spring boot.
In version 1.4 they changed the spring boot jar structure to use the BOOT-INF directory. So, if you use <version>1.4.1.RELEASE</version> for example, then your classes will be under BOOT-INF/classes. An undesirable side effect is that your configuration files (e.g., application.properties, application-myprofile.properties, etc.) will also be under BOOT-INF/classes, even though they are not Java classes.

Resolving transitive dependences in Ivy from the Maven repository

I'm using ant-ivy to resolve dependencies from the maven repository. And i'm using the same ant-ivy to publish new artifacts into that repository, so i'm generating .pom file in ant too.
The generated .pom file is very simple and looks like this(PROJECT_A):
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>COMPANY</groupId>
<artifactId>PROJECT_A</artifactId>
<packaging>jar</packaging>
<version>1.0</version>
<dependencies>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.2.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>commons-configuration</groupId>
<artifactId>commons-configuration</artifactId>
<version>1.7</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.9.5</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
So it just has some dependencies in compile scope and some in test scope. Now my ivy.xml file for that project(and the source of that .pom above) looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<ivy-module version="2.0" xmlns:m="http://ant.apache.org/ivy/maven">
<info organisation="COMPANY" module="PROJECT_A" revision="1.0" />
<configurations defaultconf="default,sources" defaultconfmapping="sources->sources;%->default">
<conf name="test" visibility="private"/>
<conf name="default" description="list of dependencies"/>
<conf name="sources" description="source files for all dependencies" />
</configurations>
<publications>
<artifact type="jar" conf="default" />
<artifact type="sources" ext="jar" m:classifier="sources" conf="sources" />
<artifact type="pom" ext="pom" conf="default" />
</publications>
<dependencies>
<!-- General -->
<dependency org="commons-collections" name="commons-collections" rev="3.2.1" transitive="false"/>
<dependency org="commons-configuration" name="commons-configuration" rev="1.7" transitive="false"/>
<dependency org="commons-lang" name="commons-lang" rev="2.6" transitive="false"/>
<dependency org="log4j" name="log4j" rev="1.2.16" transitive="false"/>
<!-- dependencies for junit testing -->
<dependency org="junit" name="junit" rev="latest.release" conf="test" />
<dependency org="org.mockito" name="mockito-all" rev="latest.release" conf="test" /> <!-- it's useful by itself, plus it has hamcrest in it which junit needs -->
</dependencies>
</ivy-module>
Again, very simple - 3 configurations, the default has all the dependencies, test is for testing dependencies and sources to publish sources.
And it all works quite well, apart of one thing - i'm declaring my dependencies as not transitive in the PROJECT_A, then when i'm pushing the pom to the repository those dependencies are listed there in the scope compile. Therefore the other project(PROJECT_B) which will have PROJECT_A as a dependency, will have all the transitive dependencies of the PROJECT_A as well, and i don't want that at all i just want those which are explicitly declared in the ivy.xml of PROJECT_A.
I've tried playing with the scopes and mappings, but it seems i really don't understand what i'm doing there as it doesn't make any sense. I would like to modify that scheme somehow so that when i include the PROJECT_A as a dependency, it'll only include the actual dependencies of the PROJECT_A declared in the ivy.xml, so transitive flag will be taken into account.
One more thing, i'm creating that .pom file like that:
<ivy:makepom ivyfile="generated-ivy.xml" pomfile="${ant.project.name}.pom" templatefile="${template.pom}" artifactPackaging="jar">
<mapping conf="default" scope="compile" />
<mapping conf="test" scope="test" />
</ivy:makepom>
Mark the dependency as <optional> to make it non-transitive.
Dirty hack, but that's maven.

Ivy cannot resolve maven-cobertura-plugin

I am using Ivy for dependency managment.
I have problems with
maven-findbgs-plugin:plugin:1.3.1
maven-cobertura-plugin:plugin:1.3
There were several topics on SO about this:e.g. Maven Dependencies can't be resolved
The answer is to exclude jaxen:
<dependency org="org.jdom" name="jdom" rev="2.0.2">
<exclude module="jaxen"/>
</dependency>
I tried to exclude these dependencies, but then got another problem:
unresolved dependency: asm#asm;2.0: java.text.ParseException: inconsistent module descriptor file found in 'http://repo1.maven.org/maven2/asm/asm/2.0/asm-2.0.pom': bad revision: expected='2.0' found='#product.version#';
Here is ivy.xml:
<?xml version="1.0" encoding="ISO-8859-1"?>
<ivy-module version="2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ant.apache.org/ivy/schemas/ivy.xsd">
<info
organisation="organisation"
module="module"
status="integration">
</info>
<dependencies>
<dependency org="dom4j" name="dom4j" rev="1.6.1"/>
<dependency org="org.jdom" name="jdom" rev="2.0.2">
<exclude module="jaxen"/>
</dependency>
<dependency org="org.apache.poi" name="poi" rev="3.8"/>
<dependency org="org.apache.poi" name="poi-ooxml" rev="3.8"/>
<dependency org="org.apache.poi" name="ooxml-schemas" rev="1.1"/>
<dependency org="junit" name="junit" rev="4.10"/>
<dependency org="org.mockito" name="mockito-all" rev="1.9.0"/>
<dependency org="maven-plugins" name="maven-cobertura-plugin" rev="1.1" />
</dependencies>
</ivy-module>
What should I to do?
First I see that you are using a really old version of maven-cobertura-plugin (1.3) the current version is 2.5.1.
Furthermore the pom you are accessing is one of those artifacts in Maven Central which are simply of bad quality which means in this case simply unusable.
The maven-findbugs-plugin you are referencing is also really old. Current version is 2.5.2 in contradiction to 1.3.1 which you are using.
What I don't understand is why are you trying to resolve Maven Plugins because you are running Ivy and following from that you are using Ant.
Here is working ivy.xml
<ivy-module version="2.0">
<info organisation="it.cup2000" module="sar"/>
<configurations defaultconfmapping="runtime->*">
<conf name="runtime" />
<conf name="compile" extends="runtime"/>
<conf name="test" extends="compile"/>
</configurations>
<dependencies>
<dependency org="org.jdom" name="jdom2" rev="2.0.3"/>
<exclude org="maven-plugins" module="maven-cobertura-plugin"/>
<exclude org="maven-plugins" module="maven-findbugs-plugin"/>
</dependencies>
</ivy-module>
The jdom2 dependency triggers the problem and the two exclude fix it

Maven - System Jar provoded by Websphere Library

I have two questions regarding dependencies:
Q1: I have a j2ee.jar on my unix box (provided by Websphere Library). This is how I refer it in ANT:
<path id="was.lib">
<fileset dir="${was.home}/lib">
<include name="**/j2ee.jar" />
</fileset>
</path>
<property name="was.lib" refid="was.lib" />
<path id="myProj.lib">
<!-- path to my project's JAR's -->
</path>
<property name="myProj.lib" refid="myProj.lib" />
<path id="myProj.classpath">
<path refid="myProj.lib" />
<path refid="was.lib" />
</path>
I am not sure, how to define this dependency in Maven so that it refers to the system path?
Q2: I have a jar castor-1.3.1.jar and castor-1.3.1-core.jar in my project. When I define the dependency for both of them, Maven only picks one, since only the version is different. But I want both of them to be included.
This is how I have defined them:
<dependency>
<groupId>org.codehaus.castor</groupId>
<artifactId>castor</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.codehaus.castor</groupId>
<artifactId>castor</artifactId>
<version>1.3.1-core</version>
</dependency>
Please help me regarding the same.
For j2ee.jar, you have two options. One is to install the jar to your local repository using mvn install:install-file. The other is to specify it as a system dependency.
As for castor-core, you can add the classifier tag
<dependency>
<groupId>org.codehaus.castor</groupId>
<artifactId>castor</artifactId>
<version>1.3.1</version>
<classifier>core</classifier>
</dependency>

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