[jira] [Created] (ARROW-6370) [JS] Table.from adds 0 on int columns

["Sascha Hofmann (Jira)" <ji...@apache.org>]

Sascha Hofmann created ARROW-6370:
-------------------------------------

             Summary: [JS] Table.from adds 0 on int columns
                 Key: ARROW-6370
                 URL: https://issues.apache.org/jira/browse/ARROW-6370
             Project: Apache Arrow
          Issue Type: Bug
          Components: JavaScript
    Affects Versions: 0.14.1
            Reporter: Sascha Hofmann


I am generating an arrow table in pyarrow and send it via gRPC like this:
{code:java}
sink = pa.BufferOutputStream()        
writer = pa.RecordBatchStreamWriter(sink, batch.schema)        writer.write_batch(batch)        
writer.close()        
yield ds.Response(
    status=200,
    loading=False,
    response=[sink.getvalue().to_pybytes()]   
)
{code}
On the javascript end, I parse it like that:
{code:java}
 Table.from(response.getResponseList()[0])
{code}
That works but when I look at the actual table, int columns have a 0 for every other row. String columns seem to be parsed just fine. 

The Python byte array created from to_pybytes() has the same length as received in javascript. I am also able to recreate the original table for the byte array in Python. 



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