[jira] [Assigned] (PARQUET-2219) ParquetFileReader throws a runtime exception when a file contains only headers and now row data

["Gang Wu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PARQUET-2219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gang Wu reassigned PARQUET-2219:
--------------------------------

    Assignee: Gang Wu

> ParquetFileReader throws a runtime exception when a file contains only headers and now row data
> -----------------------------------------------------------------------------------------------
>
>                 Key: PARQUET-2219
>                 URL: https://issues.apache.org/jira/browse/PARQUET-2219
>             Project: Parquet
>          Issue Type: Bug
>          Components: parquet-mr
>    Affects Versions: 1.12.1
>            Reporter: chris stockton
>            Assignee: Gang Wu
>            Priority: Minor
>
> Google BigQuery has an option to export table data to Parquet-formatted files, but some of these files are written with header data only.  When this happens and these files are opened with the ParquetFileReader, an exception is thrown:
> {{RuntimeException("Illegal row group of 0 rows");}}
> It seems like the ParquetFileReader should not throw an exception when it encounters such a file.
> https://github.com/apache/parquet-mr/blob/master/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/ParquetFileReader.java#L949



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