Unable to build LZO-codec

[yatharth]

Hi Community i am try to create lzo-codec in my dbfs using:
https://docs.databricks.com/en/_extras/notebooks/source/init-lzo-compressed-files.html

but i am facing the error
Cloning into 'hadoop-lzo'... The JAVA_HOME environment variable is not defined correctly This environment variable is needed to run this program NB: JAVA_HOME should point to a JDK not a JRE cp: cannot stat '/home/ubuntu/hadoop-lzo/target/hadoop-lzo-*.jar': No such file or directory

[Kaniz]

Hi @yatharth, It appears that you’re encountering an issue related to the LZO codec while working with Databricks and Hadoop.

Let’s address this step by step:

1. JAVA_HOME Environment Variable:

   • The error message indicates that the JAVA_HOME environment variable is not correctly defined. This variable is essential for running Java-based programs.
   • Ensure that you have set the JAVA_HOME environment variable to point to a JDK (Java Development Kit) installation, not a JRE (Java Runtime Environment).
   • You can set it in your shell profile (e.g., .bashrc, .bash_profile, or .zshrc) by adding a line like this:

     export JAVA_HOME=/path/to/your/jdk
     

   • Replace /path/to/your/jdk with the actual path to your JDK installation directory.

2. LZO Codec Configuration:

   • The LZO codec is used for compression in Hadoop. To resolve this issue, you need to ensure that the LZO codec is properly configured.
   • Follow these steps:
     • Update the configuration file $HADOOP_INSTALLATION_DIR/etc/hadoop/core-site.xml to register LZO codecs.
     • Add the hadoop-lzo JAR and the native library for LZO compression codec to the Hadoop classpath.
     • Make sure you download a compatible version of hadoop-lzo that matches your Hadoop version.
     • You can manually add the hadoop-lzo JAR to the classpath using the --libjars option when running you...¹.

3. Check Permissions and Paths:

   • Verify that the user running the Databricks job has the necessary permissions to access the LZO files.
   • Ensure that the LZO files have the execute (x) permission set.
   • Double-check the paths and file locations to make sure everything is correctly specified.

4. Hive-Site Configuration (if applicable):

   • If you’re using Hive, check the hive-site.xml configuration.
   • Edit the property io.compression.codecs in the local hive-site.xml file.
   • Remove the LZO codec values from this property if your cluster does not have this codec installed².

Remember to adjust the steps based on your specific environment and requirements.

If you encounter any further issues, feel free to ask for additional assistance! 😊