Tomas Tulka created MENFORCER-287:
-------------------------------------

             Summary: Exclusion of dependencies in a deeper level are ignored
                 Key: MENFORCER-287
                 URL: https://issues.apache.org/jira/browse/MENFORCER-287
             Project: Maven Enforcer Plugin
          Issue Type: Bug
    Affects Versions: 3.0.0-M1
         Environment: Apache Maven 3.3.9, jdk1.8.0_111, OS name: "windows 7", 
version: "6.1", arch: "amd64", family: "dos"
            Reporter: Tomas Tulka
         Attachments: pom.xml

Dependency Convergence returns an error even when the conflicting version is 
excluded (in a deeper level):

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.6.3</version>
        </dependency>
        <dependency>
            <groupId>com.vi</groupId>
            <artifactId>cloudwatch-log4j-appender</artifactId>
            <version>1.3</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-logging</artifactId>
                    <groupId>commons-logging</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>com.fasterxml.jackson.core</artifactId>
                    <groupId>jackson-core</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>com.fasterxml.jackson.core</artifactId>
                    <groupId>jackson-databind</groupId>
                </exclusion>
            </exclusions>
        </dependency>

Result:

Dependency convergence error for com.fasterxml.jackson.core:jackson-core:2.6.3 
paths to dependency are:
+-com.mycompany:MavenDependencyConvergenceEval:1.0-SNAPSHOT
  +-com.fasterxml.jackson.core:jackson-core:2.6.3
and
+-com.mycompany:MavenDependencyConvergenceEval:1.0-SNAPSHOT
  +-com.vi:cloudwatch-log4j-appender:1.3
    +-com.amazonaws:aws-java-sdk-logs:1.11.5
      +-com.amazonaws:aws-java-sdk-core:1.11.5
        +-com.fasterxml.jackson.core:jackson-databind:2.6.6
          +-com.fasterxml.jackson.core:jackson-core:2.6.6
and
+-com.mycompany:MavenDependencyConvergenceEval:1.0-SNAPSHOT
  +-com.vi:cloudwatch-log4j-appender:1.3
    +-com.amazonaws:aws-java-sdk-logs:1.11.5
      +-com.amazonaws:aws-java-sdk-core:1.11.5
        +-com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.6.6
          +-com.fasterxml.jackson.core:jackson-core:2.6.6

There is actually only one version of dependency 
com.fasterxml.jackson.core:jackson-core:

[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ 
MavenDependencyConvergenceEval ---
[INFO] com.mycompany:MavenDependencyConvergenceEval:pom:1.0-SNAPSHOT
[INFO] +- com.fasterxml.jackson.core:jackson-core:jar:2.6.3:compile
[INFO] \- com.vi:cloudwatch-log4j-appender:jar:1.3:compile
[INFO]    +- org.apache.logging.log4j:log4j-core:jar:2.5:compile
[INFO]    |  \- org.apache.logging.log4j:log4j-api:jar:2.5:compile
[INFO]    \- com.amazonaws:aws-java-sdk-logs:jar:1.11.5:compile
[INFO]       \- com.amazonaws:aws-java-sdk-core:jar:1.11.5:compile
[INFO]          +- org.apache.httpcomponents:httpclient:jar:4.5.2:compile
[INFO]          |  +- org.apache.httpcomponents:httpcore:jar:4.4.4:compile
[INFO]          |  \- commons-codec:commons-codec:jar:1.9:compile
[INFO]          +- com.fasterxml.jackson.core:jackson-databind:jar:2.6.6:compile
[INFO]          |  \- 
com.fasterxml.jackson.core:jackson-annotations:jar:2.6.0:compile
[INFO]          +- 
com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:jar:2.6.6:compile
[INFO]          \- joda-time:joda-time:jar:2.8.1:compile



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