[ https://issues.apache.org/jira/browse/PARQUET-2089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated PARQUET-2089: ------------------------------------ Labels: pull-request-available (was: ) > [C++] RowGroupMetaData file_offset set incorrectly > -------------------------------------------------- > > Key: PARQUET-2089 > URL: https://issues.apache.org/jira/browse/PARQUET-2089 > Project: Parquet > Issue Type: Bug > Components: parquet-cpp > Reporter: Archie Menzies > Assignee: Micah Kornfield > Priority: Major > Labels: pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > It appears that the RowGroupMetaData file_offset property is being set to the > same value as the first ColumnMetaData file_offset property in > [https://github.com/apache/arrow/blob/8e43f23dcc6a9e630516228f110c48b64d13cec6/cpp/src/parquet/metadata.cc#L1557-L1565] > > This is not consistent with the definition of these properties given in the > Thrift file: > [https://github.com/apache/arrow/blob/master/cpp/src/parquet/parquet.thrift] > {code:java} > struct ColumnChunk { > ... > /** Byte offset in file_path to the ColumnMetaData **/ > 2: required i64 file_offset > > ... > } > ... > struct RowGroup { > ... > /** Byte offset from beginning of file to first page (data or dictionary) > * in this row group **/ > 5: optional i64 file_offset > ... > } > {code} > This is causing issues when trying to read the file with the parquet-mr > libraries, because the RowGroup's file offset is used to determine whether a > RowGroup exists within a given file split: > [https://github.com/apache/parquet-mr/blob/master/parquet-hadoop/src/main/java/org/apache/parquet/format/converter/ParquetMetadataConverter.java#L1226-L1251] > > This issue is therefore resulting in Parquet files which cannot be read as > the metadata is incorrect. -- This message was sent by Atlassian Jira (v8.3.4#803005)