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parquet_file_writer_poc's Introduction

Parquet File Writer POC

This is a simple Java POC to create Parquet files This is a Spring Boot project.

How to Build

Once you clone the repository, cd into the project root directory and run the following command to build the project:

mvn clean install

How to Run

Once you build the project, the build command will generate a .jar file in the target/ directory. The name of the .jar file will be parquet_file_writer_poc-1.0-SNAPSHOT.jar. You can run this project by executing the following command from the project root directory:

java -jar target/parquet_file_writer_poc-1.0-SNAPSHOT.jar

Output Files

The output files will be generated in the resources/output directory. You can check this directory after running the project to check your output files.

parquet_file_writer_poc's People

Contributors

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Forkers

michael-qinzhen morningman lxw91 aldrichzeng vaquarkhan 962014008 ljh19822000

parquet_file_writer_poc's Issues

no native lib Mac

The build failed on Mac with:
org.xerial.snappy.SnappyError: [FAILED_TO_LOAD_NATIVE_LIBRARY] no native library is found for os.name=Mac and os.arch=aarch64

This is solved by upgrading parquet-hadoop to 1.13.0

It could also be good to add to the readme that settings in the application.properties needs to be filled in or better yet set them to the relative path:

schema.filePath=src/main/resources/schemas/user.schema
output.directoryPath=src/main/resources/output

After those two changes it worked fine on Mac.

Not able to execute the project

Encountered below error:
Action:

Correct the classpath of your application so that it contains a single, compatible version of org.springframework.expression.spel.support.StandardTypeConverter

Issues with Binary data type

Rest all is working fine, but binary data type is written in encrypted format. When a parquet file is cat using parquet-tools, it shows something like this.

  • /Desktop/parq/Parquet_File_Writer_POC/src/main/resources/output$ parquet-tools cat 1638791144218.parquet
    id = 1
    username = TmFtZTE=
    active = true

id = 2
username = TmFtZTI=
active = false

because of this my files are not processed further

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