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https://issues.apache.org/jira/browse/PARQUET-2219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17655782#comment-17655782
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ASF GitHub Bot commented on PARQUET-2219:
-----------------------------------------
wgtmac opened a new pull request, #1018:
URL: https://github.com/apache/parquet-mr/pull/1018
### Jira
My PR addresses the
[PARQUET-2219](https://issues.apache.org/jira/browse/PARQUET/PARQUET-2219).
### Tests
My PR adds the following unit test to read parquet file with empty row group:
-
parquet-hadoop/src/test/java/org/apache/parquet/hadoop/TestParquetReaderEmptyBlock.java
### Commits
The parquet specs does not forbid empty row group and some implementations
are able to generate files with empty row group. The commit aims to make
ParquetFileReader robust by skipping empty row group while reading.
> 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
> 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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