S3AFileSystem not found 에러

java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.hadoop.fs.s3a.S3AFileSystem not found

-> 해결
https://github.com/GoogleCloudPlatform/spark-on-k8s-operator/issues/1508#issuecomment-1124952216

• spark의 jars 폴더로 이동해서 다운받기