如何配置Maven Deploy，使构件已存在时部署失败？

Got it, let's get this sorted for you! By default, the maven-deploy-plugin will either overwrite existing SNAPSHOT artifacts or (depending on your repository's settings) might block overwriting RELEASE artifacts. But to explicitly make the deploy step fail immediately if the artifact already exists in the repository—regardless of its type—you just need to add one simple configuration parameter to your existing plugin setup.

Here's how to update your maven-deploy-plugin configuration:

<plugin>
    <artifactId>maven-deploy-plugin</artifactId>
    <version>2.8.1</version>
    <executions>
        <execution>
            <id>default-deploy</id>
            <phase>deploy</phase>
            <goals>
                <goal>deploy</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <serverId>nexus</serverId>
        <nexusUrl>https://nexus/</nexusUrl>
        <skipStaging>false</skipStaging>
        <!-- Add this line to fail if artifact exists -->
        <failIfExists>true</failIfExists>
    </configuration>
</plugin>

What this does: #

The failIfExists parameter (available in maven-deploy-plugin 2.8 and later, which matches your 2.8.1 version) tells Maven to check if the artifact you're trying to deploy already exists in the target repository. If it does, the deploy process will throw an error and stop immediately instead of proceeding to overwrite or skip.

A quick note: If your Nexus repository is configured to block overwrites for release artifacts (which is a common best practice), you might already get a failure from Nexus itself. But adding this parameter ensures the check happens at the Maven level first, giving you a clearer, faster failure signal before even reaching the repository.

内容的提问来源于stack exchange，提问作者Deepti Pillai