Why am I getting the [==[ Zip END Header Not Found error ]]**]] in Maven?

Apache Atlas 2.3.0 Build Failure on Ubuntu (Java 11, Maven 3.6.3) - Zip END Header Not Found Error

Overview

Apache Atlas is an open-source project designed for managing metadata in big data ecosystems. It provides governance, lineage tracking, and other metadata management capabilities that help organizations manage their data assets effectively. However, like many open-source projects, installing and building Apache Atlas can sometimes lead to issues depending on the environment and dependencies.

In this article, we will explore a specific issue encountered while attempting to install Apache Atlas 2.3.0 on an Ubuntu server running Java 11 and Maven 3.6.3. The error you're encountering is related to a missing or corrupted org.restlet dependency. Specifically, you are seeing the Zip END Header Not Found error during the build process. We will dive into the possible causes of this error, and offer troubleshooting steps, solutions, and workarounds.

System Setup and Environment

Before diving into the troubleshooting steps, let's take a quick look at the environment you're working with:

Apache Atlas Version: 2.3.0

Operating System: Ubuntu (Assumed version 20.04 or 22.04)

Java Version: Java 11 (OpenJDK)

Maven Version: 3.6.3

Dependency Issue: Missing or corrupt org.restlet library during build

Error Message: Zip END Header Not Found

This problem is typically related to a corrupted or incomplete download of a dependency during the build process, but it could also be caused by issues with Maven's local repository or incorrect dependency versions.

Prerequisites

Ensure that the following prerequisites are met before proceeding with the installation and build:

Java 11 is installed and set as the default Java version.

Maven 3.6.3 is installed. You can verify the installation by running mvn -v.

Git is installed and functional (for checking out the source code).

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sudo apt update sudo apt install openjdk-11-jdk maven git

Understanding the Issue

The error you’re seeing, Zip END Header Not Found, typically occurs when there is a problem with the ZIP file (such as a JAR file) being downloaded by Maven. This is usually a result of:

A corrupted JAR file due to an incomplete download.

A proxy or network issue that interferes with downloading dependencies.

Incorrect or incompatible versions of dependencies.

Maven's local repository being in an inconsistent state.

Apache Atlas has several dependencies, and it’s possible that one or more are not being downloaded correctly, especially the org.restlet library. In this case, the library might be corrupted or incomplete.

Troubleshooting Steps

Step 1: Clean Maven Cache

A common cause of the "Zip END Header Not Found" error is a corrupted JAR file in Maven’s local repository. To resolve this, clear Maven's local repository cache:

Clear the cache by deleting the repository folder:

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rm -rf ~/.m2/repository/org/restlet

Rebuild the project:

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mvn clean install

This forces Maven to re-download the required dependencies.

Step 2: Verify the Repository URL

Ensure that your Maven settings are correctly configured to point to a valid repository. Open your pom.xml file and verify that the repository URL is valid. If you are using an internal repository or mirror, make sure it’s accessible.

You can also check Maven’s settings.xml file (located in ~/.m2/settings.xml or /etc/maven/settings.xml on Linux) to ensure there are no issues with your repository configurations.

Step 3: Force Maven to Update Dependencies

If clearing the cache doesn’t work, you can instruct Maven to update all dependencies. This can help if there are version mismatches or if the dependencies are not being downloaded correctly.

Use the following command to force Maven to update the dependencies:

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mvn clean install -U

The -U flag tells Maven to update the dependencies even if they are already in the local repository.

Step 4: Check Network Connectivity and Proxy Configuration

If you’re behind a proxy or experiencing network issues, Maven might not be able to download dependencies properly. Make sure your proxy settings are configured correctly in the Maven settings.xml file.

For example, add the following to ~/.m2/settings.xml if you are behind a proxy:

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example-proxy true http proxy.example.com 8080 proxyuser somepassword www.google.com|*.example.com

Step 5: Verify JDK and Maven Compatibility

Ensure that you're using Java 11 and Maven 3.6.3, as these versions are known to work well with Apache Atlas 2.3.0. While Apache Atlas may be compatible with other versions of Java and Maven, incompatibilities might cause build issues.

You can check your Java and Maven versions using the following commands:

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java -version mvn -v

If you're not using Java 11, you may need to install and configure it:

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sudo apt install openjdk-11-jdk sudo update-alternatives --config java

Step 6: Dependency Version Conflicts

It is possible that there is a version conflict between org.restlet and other dependencies. Check your pom.xml to ensure the correct version of org.restlet is specified. You can also check the Maven Repository for the latest version of this dependency.

If you suspect a conflict, you can try excluding the conflicting dependency in your pom.xml:

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org.restlet org.restlet 2.x provided

Step 7: Manual Dependency Download

If the issue persists, you can manually download the required dependency (org.restlet) from a repository like Maven Central and place it in your local Maven repository.

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curl -O https://repo1.maven.org/maven2/org/restlet/org.restlet/2.3.12/org.restle... mv org.restlet-2.3.12.jar ~/.m2/repository/org/restlet/org.restlet/2.3.12/

After this, try building again.

FAQ - Apache Atlas 2.3.0 Build Failure on Ubuntu

Q1: Why am I getting the Zip END Header Not Found error in Maven?

A1: This error typically occurs when a JAR file (or any other artifact) is corrupted or not fully downloaded. Maven downloads dependencies from a repository and stores them in your local cache (~/.m2/repository). If the download process is interrupted or the file is corrupted, Maven will fail to read it, resulting in this error.

Q2: How can I fix corrupted dependencies in Maven?

A2: You can fix corrupted dependencies by cleaning the Maven cache. Delete the affected dependency from the local repository and then rebuild the project. Run the following command:

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rm -rf ~/.m2/repository/org/restlet mvn clean install

Alternatively, you can force Maven to update all dependencies with the -U flag:

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mvn clean install -U

Q3: What if the org.restlet dependency is missing entirely?

A3: If the org.restlet dependency is missing from your local Maven repository, you can try manually downloading it or running the build with the -U flag to force Maven to download the missing dependency.

Q4: How do I check which version of Java and Maven I am using?

A4: To check your Java version, run:

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java -version

To check your Maven version, run:

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mvn -v

Q5: Can I use Java 8 or Java 17 with Apache Atlas 2.3.0?

A5: While Apache Atlas 2.3.0 officially supports Java 11, it may work with Java 8 or Java 17 as well. However, compatibility issues may arise, especially with Java 17 due to the introduction of new features and deprecations. It's recommended to use Java 11 for stability.

Q6: How can I check if Maven is configured to use the correct repositories?

A6: You can check your Maven settings in the settings.xml file located at ~/.m2/settings.xml or /etc/maven/settings.xml. Ensure that the repository URLs are correct and accessible.

Q7: I am still facing issues with dependencies. What should I do?

A7: If the problem persists, check for version conflicts between dependencies in your pom.xml and ensure that all dependencies are compatible. You may also want to check for updates to Apache Atlas or try a different version.

By following these troubleshooting steps and understanding the underlying causes of the Zip END Header Not Found error, you should be able to resolve the build failure and successfully install Apache Atlas 2.3.0 on your Ubuntu server. If you continue to experience issues, consider seeking help from the Apache Atlas community, where you can share your specific configuration and error details for more targeted assistance.