[jira] [Created] (ARROW-9946) ParquetFileWriter segfaults when `sink` is a string

["Karl Dunkle Werner (Jira)" <ji...@apache.org>]

Karl Dunkle Werner created ARROW-9946:
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             Summary: ParquetFileWriter segfaults when `sink` is a string
                 Key: ARROW-9946
                 URL: https://issues.apache.org/jira/browse/ARROW-9946
             Project: Apache Arrow
          Issue Type: Improvement
          Components: R
    Affects Versions: 1.0.1
         Environment: Ubuntu 20.04
            Reporter: Karl Dunkle Werner


Hello again! I have another minor R arrow issue.

 

The {{ParquetFileWriter}} docs say that the {{sink}} argument can be a "string which is interpreted as a file path". However, when I try to use a string, I get a segfault because the memory isn't mapped.

 

Maybe this is a separate request, but it would also be helpful to have documentation for the methods of the writer created by {{ParquetFileWriter$create()}}.

Docs link: [https://arrow.apache.org/docs/r/reference/ParquetFileWriter.html]

 
{code:r}
library(arrow)

sch = schema(a = float32())
writer = ParquetFileWriter$create(schema = sch, sink = "test.parquet")

#> *** caught segfault ***
#> address 0x14100007d, cause 'memory not mapped'
#> 
#> Traceback:
#> 1: parquet___arrow___ParquetFileWriter__Open(schema, sink, properties,     arrow_properties)
#> 2: shared_ptr_is_null(xp)
#> 3: shared_ptr(ParquetFileWriter, parquet___arrow___ParquetFileWriter__Open(schema,     sink, properties, arrow_properties))
#> 4: ParquetFileWriter$create(schema = sch, sink = "test.parquet")


# This works as expected:
sink = FileOutputStream$create("test.parquet")
writer = ParquetFileWriter$create(schema = sch, sink = sink)
{code}



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