Known Issues for Apache Sqoop

Learn about the known issues in Sqoop, the impact or changes to the functionality, and the workaround.

Avro, S3, and HCat do not work together properly
Importing an Avro file into S3 with HCat fails with Delegation Token not available.
Parquet columns inadvertently renamed
Column names that start with a number are renamed when you use the --as-parquetfile option to import data.
Prepend column names in Parquet tables with one or more letters or underscore characters.
Importing Parquet files might cause out-of-memory (OOM) errors
Importing multiple megabytes per row before initial-page-run check (ColumnWriter) can cause OOM. Also, rows that vary significantly by size so that the next-page-size check is based on small rows, and is set very high, followed by many large rows can also cause OOM.