daniel-adam-tfs opened a new issue, #342: URL: https://github.com/apache/arrow-go/issues/342
### 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: https://github.com/apache/arrow-go/commit/6dc6926acfe6e70335511f2df67f57006f8bddec) 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 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
