Maven dependency exclusions: Same artifact-id issue - apache

Question

I have an Apache Cocoon Project and I wanted to update Apache FOP from 1.0 to 1.1, in order to fix foreign (non-latin) script issues, such as Greek.
I found FOP 1.1 has a Maven dependency:
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>fop</artifactId>
<version>1.1</version>
</dependency>
ERROR: Failed to execute goal on project X: Could not resolve dependencies for project com.X:jar:1.0-SNAPSHOT: Failure to find org.apache.avalon.framework:avalon-framework-api:jar:4.2.0 in http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -> [Help 1]
I search for a solution in this issue and I found that this dependency has broken links to some other dependencies, which FOP 1.1 needs to call. These are connected with Avalon framework API 4.2. I read in a mailing list that maybe trying to use exclusions and call extra dependencies is working fine. The solution was this code:
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>fop</artifactId>
<version>1.1</version>
<exclusions>
<exclusion>
<artifactId>avalon-framework-api</artifactId>
<groupId>org.apache.avalon.framework</groupId>
</exclusion>
<exclusion>
<artifactId>avalon-framework-impl</artifactId>
<groupId>org.apache.avalon.framework</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- these two are to correct issues in fop dependency -->
<dependency>
<groupId>avalon-framework</groupId>
<artifactId>avalon-framework-api</artifactId>
<version>4.2.0</version>
</dependency>
<dependency>
<groupId>avalon-framework</groupId>
<artifactId>avalon-framework-impl</artifactId>
<version>4.2.0</version>
</dependency>
Now compilation returns the following ERROR2: "Failed to execute goal org.apache.cocoon:cocoon-maven-plugin:1.0.0-M2:prepare (prepare) on project X: There are at least two artifacts with the ID 'avalon-framework-api': avalon-framework:avalon-framework-api:jar:4.2.0:compile".
Of course there are. Two dependencies are excluded, the broken ones, and two of them are called, the correct ones. How can I fix this issue?

Answer 1

Haven't tested this yet, but perhaps excluding org.apache.avalon.framework v4.2.0 and include the latest v4.3.1 instead. Such as:
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>fop</artifactId>
<version>1.1</version>
<exclusions>
<exclusion>
<groupId>org.apache.avalon.framework</groupId>
<artifactId>avalon-framework-api</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.avalon.framework</groupId>
<artifactId>avalon-framework-impl</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.avalon.framework</groupId>
<artifactId>avalon-framework-api</artifactId>
<version>4.3.1</version>
</dependency>
<dependency>
<groupId>org.apache.avalon.framework</groupId>
<artifactId>avalon-framework-impl</artifactId>
<version>4.3.1</version>
</dependency>