Data race in GetColumnPageReader #342
Description
Describe the bug, including details regarding any error messages, version, and platform.
Is the reading of columns by a single rgReader from multiple Go routines supported?
We're reading four columns from a single row group concurrently. It worked fine in v18.1, but with v18.2 (and this commit: 6dc6926) there is now a data race on the assignment/read of r.rgPageIndexReader.
Trace from the race detector:
WARNING: DATA RACE
Read at 0x00c000af6040 by goroutine 9596:
github.com/apache/arrow-go/v18/parquet/file.(*RowGroupReader).GetColumnPageReader()
/go/pkg/mod/github.com/apache/arrow-go/v18@v18.2.0/parquet/file/row_group_reader.go:131 +0x1c39
github.com/apache/arrow-go/v18/parquet/file.(*RowGroupReader).Column()
/go/pkg/mod/github.com/apache/arrow-go/v18@v18.2.0/parquet/file/row_group_reader.go:70 +0x296
github.com/thermofisher/cmd/research/parqstore/internal/parquetutil.ReadParquetColumnIndexBatch[go.shape.[]int32,go.shape.int32]()
/go/src/parqstore/internal/parquetutil/parquetutil.go:205 +0x73
github.com/thermofisher/cmd/research/parqstore/internal/chromatogram.(*centroidReader).readSimpleCentroidRowGroup.func1()
/go/src/parqstore/internal/chromatogram/centroidreader.go:251 +0x104
Previous write at 0x00c000af6040 by goroutine 9597:
github.com/apache/arrow-go/v18/parquet/file.(*RowGroupReader).GetColumnPageReader()
/go/pkg/mod/github.com/apache/arrow-go/v18@v18.2.0/parquet/file/row_group_reader.go:94 +0x1a4
github.com/apache/arrow-go/v18/parquet/file.(*RowGroupReader).Column()
/go/pkg/mod/github.com/apache/arrow-go/v18@v18.2.0/parquet/file/row_group_reader.go:70 +0x296
github.com/thermofisher/cmd/research/parqstore/internal/parquetutil.ReadParquetColumnIndexBatch[go.shape.[]float64,go.shape.float64]()
/go/src/parqstore/internal/parquetutil/parquetutil.go:205 +0x73
github.com/thermofisher/cmd/research/parqstore/internal/chromatogram.(*centroidReader).readSimpleCentroidRowGroup.func2()
/go/src/parqstore/internal/chromatogram/centroidreader.go:263 +0x106
Component(s)
Parquet