Hadoop Common Maven
Hadoop Common is a module within the Apache Hadoop project that contains common utilities, libraries, and dependencies used by various components of the Hadoop ecosystem. Maven is a popular build and dependency management tool used in Java projects. When you refer to “Hadoop Common Maven,” you might be asking about how to use Maven to manage dependencies for Hadoop Common or how to build a project that depends on Hadoop Common.
Here are some common tasks related to using Maven with Hadoop Common:
1. Adding Hadoop Common Dependency:
To include Hadoop Common as a dependency in your Maven project, you need to add the appropriate dependency information to your project’s pom.xml
file. The specific dependency declaration may vary depending on the version of Hadoop you are using. Here’s a general example:
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version><!-- Specify the desired Hadoop version --></version>
</dependency>
<!-- Other dependencies -->
</dependencies>
Replace <!-- Specify the desired Hadoop version -->
with the version of Hadoop Common you want to use.
2. Building with Maven:
Once you’ve added the Hadoop Common dependency to your project’s pom.xml
, you can use Maven to build your project. Maven will automatically download the required Hadoop Common JARs and any transitive dependencies from the Maven Central Repository or another configured repository.
To build your project with Maven, open a terminal/command prompt in your project’s directory and run:
mvn clean install
This command will compile your code, resolve dependencies, and create the project’s build artifacts, including any executable JAR files.
3. Custom Hadoop Common Builds:
In some cases, you may need to build a custom version of Hadoop Common from its source code. Maven can be used to build Hadoop Common itself. To do this, you need to clone the Hadoop source code repository, navigate to the hadoop-common
module’s directory, and use Maven to build it.
For example, to build Hadoop Common from source:
# Clone the Hadoop repository
git clone https://github.com/apache/hadoop.git
# Navigate to the hadoop-common directory
cd hadoop/hadoop-common
# Build Hadoop Common
mvn clean install -Pdist,native -DskipTests
This will build Hadoop Common and create the necessary JAR files and native libraries.
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