How to resolve or remove snapshot duplicate in reactor . can any one help ?

Question

[ERROR] Project 'com.aembootcamp:aem-bootcamp.ui.frontend:1.0.0-SNAPSHOT' is duplicated in the reactor @
[ERROR] Project 'com.aembootcamp:aem-bootcamp.ui.frontend:1.0.0-SNAPSHOT' is duplicated in the reactor -> [Help 1]

A_H_M_Imrul · Accepted Answer

Hello @anilkumar9,

The reason of this error possibly is the following structure of your codebase

+-- root-project-A
    `-- pom.xml
    +-- module-A
    |   `-- pom.xml
    +-- module-B
    |   `-- pom.xml
    +-- root-project-B
        `-- pom.xml
        +-- module-C
            `-- pom.xml

It should be the following:

|-- root-project-A
    `-- pom.xml
        <modules>
         <module>module-A</module>
         <module>module-B</module>
         <module>root-project-B</module> <!-- Error: project A reference project B -->
         <module>root-project-B/module-C</module> <!-- Error: project A reference project B -->
        </modules>

|-- root-project-B
    `-- pom.xml
        <modules>
         <module>module-C</module>
        </modules>

let me know if that makes sense..

Jagadeesh_Prakash · Answer

@anilkumar9

The error message you're encountering, "Project 'com.aembootcamp:aem-bootcamp.ui.frontend:1.0.0-SNAPSHOT' is duplicated in the reactor," typically occurs in a multi-module Maven project when there are duplicate references to the same project within the reactor build. This can happen if a module is listed multiple times in the <modules> section of your parent pom.xml file or if there are cyclic dependencies between modules.

Check <modules> in Parent POM

Ensure that the <modules> section lists each module only once. Remove any duplicate entries. It should look something like this

<modules>
<module>module1</module>
<module>module2</module>

</modules>

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