Ivy project can't get the latest Maven snapshot (with assembly plugin) - maven

Question

When a Ivy project depends a maven project (using assembly plugin), there will be problems. For example:
Maven project:
Suppose the maven project will deploy 2 snapshot packages: for exmaple, one is my-app-1.0.0-20130504.000602-1.jar and the other is my-app-1.0.0-20130504.001348-1-myzip.zip. The pom.xml is shown below.
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany.app</groupId>
<artifactId>my-app</artifactId>
<packaging>jar</packaging>
<version>1.0.0-SNAPSHOT</version>
<... ...>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2.1</version>
<configuration>
<descriptors>
<descriptor>src/main/assembly.xml</descriptor>
</descriptors>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.7</version>
<configuration>
<groupId>${project.groupId}</groupId>
<artifactId>${project.artifactId}</artifactId>
<version>${project.version}</version>
<packaging>zip</packaging>
<file>my-app-1.01-myzip.zip</file>
</configuration>
</plugin>
</plugins>
</build>
</project>
The Ivy project
The Ivy project depends on the 2 artifacts published by above maven project. The ivy.xml is shown below:
<configurations>
<conf name="get-maven" />
</configurations>
<dependencies>
<dependency org="com.mycompany.app" name="my-app" rev="1.0.0-SNAPSHOT" changing="true" conf="get-maven->default">
<artifact name="my-app" ext="jar" type="jar"></artifact>
<artifact name="my-app" ext="zip" type="zip" m:classifier="myzip"></artifact>
</dependency>
</dependencies>
Issues:
Each time when the maven project deploy new snapshot to the artifactory server, the ivy project can retrieve the latest my-app-xxx.jar from the artifacory server but it can't retrieve the latest my-app-xxx-myzip.zip (ivy can't get to know that the zip is updated and just retrieve the zip from local cache).
What I have to do is to delete the local cache, and run the ivy project again.
I did some investigation, and found the ivy task "convertpom" didn't convert the app-xxx-myzip.zip from pom to ivy, and only 1 artifact (the my-app-xxx.jar) can be found in the converted ivy.xml. Not sure if this is the root cause.
Can anyone help on this? How can I get the lastet snapshots for both artifacts in ivy project?
Regards,
Alben

Answer 1

So to clarify, you're attempting to configure ivy to pull down a snapshot dependency published by a Maven project?
In that case, the following answer will help to explain:
What's wrong with this Ivy changingPattern / SNAPSHOT configuration?