[
https://issues.apache.org/jira/browse/ARROW-17644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
helmi updated ARROW-17644:
--------------------------
Description:
Hi everyone,
I'm trying to read binary file using csharp apache arrow library v9.0.0 and I'm
facing this exception
{code:java}
Unhandled exception. System.AggregateException: One or more errors occurred.
(Value cannot be null. (Parameter 'name'))
---> System.ArgumentNullException: Value cannot be null. (Parameter 'name')
at Apache.Arrow.Field..ctor(String name, IArrowType dataType, Boolean
nullable)
at Apache.Arrow.Ipc.MessageSerializer.FieldFromFlatbuffer(Field
flatbufField, DictionaryMemo& dictionaryMemo)
at Apache.Arrow.Ipc.MessageSerializer.FieldFromFlatbuffer(Field
flatbufField, DictionaryMemo& dictionaryMemo)
at Apache.Arrow.Ipc.MessageSerializer.GetSchema(Schema schema,
DictionaryMemo& dictionaryMemo)
at
Apache.Arrow.Ipc.ArrowStreamReaderImplementation.<ReadSchemaAsync>b__10_0(Memory`1
buff)
at Apache.Arrow.ArrayPoolExtensions.RentReturnAsync(ArrayPool`1 pool, Int32
length, Func`2 action)
at Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadSchemaAsync()
at
Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadRecordBatchAsync(CancellationToken
cancellationToken)
at
Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadNextRecordBatchAsync(CancellationToken
cancellationToken) {code}
As far as I do understand, the library is complaining about field name being
null, not sure if it's the case since I tried to read the same file using
apache arrow golang library and it seems to work without issue.
Please find attached the `sample.arrow` file
Below a sample code I'm using to read this arrow file:
*Csharp sample
{code:java}
using System;
using System.IO;
using System.Threading.Tasks;
using Apache.Arrow;
using Apache.Arrow.Ipc;
namespace arrow_csharp_issue
{
class Program
{
static async Task AsyncMain()
{
byte[] bytes = File.ReadAllBytes("./inputs/sample.arrow");
using (var memoryStream = new MemoryStream(bytes))
using (var reader = new ArrowStreamReader(memoryStream))
{ RecordBatch record = await reader.ReadNextRecordBatchAsync();
Console.WriteLine(record); }
}
static void Main(string[] args)
{ AsyncMain().Wait(); }
}
} {code}
* Golang sample
{code:java}
package main
import (
"bytes"
"fmt"
"os"
"github.com/apache/arrow/go/v9/arrow/ipc"
)
func main() {
data, err := os.ReadFile("./inputs/sample.arrow")
if err != nil
{ panic(err) }
reader, err := ipc.NewReader(bytes.NewReader(data))
if err != nil { panic(err) }
defer reader.Release() {code}
reader.Next()
record := reader.Record()
fmt.Println(record)
}
```
Thank you
was:
Hi everyone,
I'm trying to read binary file using csharp apache arrow library v9.0.0 and I'm
facing this exception
```
Unhandled exception. System.AggregateException: One or more errors occurred.
(Value cannot be null. (Parameter 'name'))
---> System.ArgumentNullException: Value cannot be null. (Parameter 'name')
at Apache.Arrow.Field..ctor(String name, IArrowType dataType, Boolean
nullable)
at Apache.Arrow.Ipc.MessageSerializer.FieldFromFlatbuffer(Field
flatbufField, DictionaryMemo& dictionaryMemo)
at Apache.Arrow.Ipc.MessageSerializer.FieldFromFlatbuffer(Field
flatbufField, DictionaryMemo& dictionaryMemo)
at Apache.Arrow.Ipc.MessageSerializer.GetSchema(Schema schema,
DictionaryMemo& dictionaryMemo)
at
Apache.Arrow.Ipc.ArrowStreamReaderImplementation.<ReadSchemaAsync>b__10_0(Memory`1
buff)
at Apache.Arrow.ArrayPoolExtensions.RentReturnAsync(ArrayPool`1 pool, Int32
length, Func`2 action)
at Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadSchemaAsync()
at
Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadRecordBatchAsync(CancellationToken
cancellationToken)
at
Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadNextRecordBatchAsync(CancellationToken
cancellationToken)
```
As far as I do understand, the library is complaining about field name being
null, not sure if it's the case since I tried to read the same file using
apache arrow golang library and it seems to work without issue.
Please find attached the `sample.arrow` file
Below a sample code I'm using to read this arrow file:
*Csharp sample
```
using System;
using System.IO;
using System.Threading.Tasks;
using Apache.Arrow;
using Apache.Arrow.Ipc;
namespace arrow_csharp_issue
{
class Program
{
static async Task AsyncMain()
{
byte[] bytes = File.ReadAllBytes("./inputs/sample.arrow");
using (var memoryStream = new MemoryStream(bytes))
using (var reader = new ArrowStreamReader(memoryStream))
{
RecordBatch record = await reader.ReadNextRecordBatchAsync();
Console.WriteLine(record);
}
}
static void Main(string[] args)
{
AsyncMain().Wait();
}
}
}
```
* Golang sample
```
package main
import (
"bytes"
"fmt"
"os"
"github.com/apache/arrow/go/v9/arrow/ipc"
)
func main() {
data, err := os.ReadFile("./inputs/sample.arrow")
if err != nil {
panic(err)
}
reader, err := ipc.NewReader(bytes.NewReader(data))
if err != nil {
panic(err)
}
defer reader.Release()
reader.Next()
record := reader.Record()
fmt.Println(record)
}
```
Thank you
> Exception when reading binary arrow file (Value cannot be null. (Parameter
> 'name'))
> -----------------------------------------------------------------------------------
>
> Key: ARROW-17644
> URL: https://issues.apache.org/jira/browse/ARROW-17644
> Project: Apache Arrow
> Issue Type: Bug
> Components: C#
> Reporter: helmi
> Priority: Major
> Attachments: sample.arrow
>
>
> Hi everyone,
> I'm trying to read binary file using csharp apache arrow library v9.0.0 and
> I'm facing this exception
> {code:java}
> Unhandled exception. System.AggregateException: One or more errors occurred.
> (Value cannot be null. (Parameter 'name'))
> ---> System.ArgumentNullException: Value cannot be null. (Parameter 'name')
> at Apache.Arrow.Field..ctor(String name, IArrowType dataType, Boolean
> nullable)
> at Apache.Arrow.Ipc.MessageSerializer.FieldFromFlatbuffer(Field
> flatbufField, DictionaryMemo& dictionaryMemo)
> at Apache.Arrow.Ipc.MessageSerializer.FieldFromFlatbuffer(Field
> flatbufField, DictionaryMemo& dictionaryMemo)
> at Apache.Arrow.Ipc.MessageSerializer.GetSchema(Schema schema,
> DictionaryMemo& dictionaryMemo)
> at
> Apache.Arrow.Ipc.ArrowStreamReaderImplementation.<ReadSchemaAsync>b__10_0(Memory`1
> buff)
> at Apache.Arrow.ArrayPoolExtensions.RentReturnAsync(ArrayPool`1 pool,
> Int32 length, Func`2 action)
> at Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadSchemaAsync()
> at
> Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadRecordBatchAsync(CancellationToken
> cancellationToken)
> at
> Apache.Arrow.Ipc.ArrowStreamReaderImplementation.ReadNextRecordBatchAsync(CancellationToken
> cancellationToken) {code}
> As far as I do understand, the library is complaining about field name being
> null, not sure if it's the case since I tried to read the same file using
> apache arrow golang library and it seems to work without issue.
> Please find attached the `sample.arrow` file
> Below a sample code I'm using to read this arrow file:
> *Csharp sample
> {code:java}
> using System;
> using System.IO;
> using System.Threading.Tasks;
> using Apache.Arrow;
> using Apache.Arrow.Ipc;
> namespace arrow_csharp_issue
> {
> class Program
> {
> static async Task AsyncMain()
> {
> byte[] bytes = File.ReadAllBytes("./inputs/sample.arrow");
> using (var memoryStream = new MemoryStream(bytes))
> using (var reader = new ArrowStreamReader(memoryStream))
>
> { RecordBatch record = await
> reader.ReadNextRecordBatchAsync(); Console.WriteLine(record);
> }
> }
> static void Main(string[] args)
>
> { AsyncMain().Wait(); }
> }
> } {code}
> * Golang sample
> {code:java}
> package main
> import (
> "bytes"
> "fmt"
> "os"
> "github.com/apache/arrow/go/v9/arrow/ipc"
> )
> func main() {
> data, err := os.ReadFile("./inputs/sample.arrow")
> if err != nil
> { panic(err) }
> reader, err := ipc.NewReader(bytes.NewReader(data))
> if err != nil { panic(err) }
> defer reader.Release() {code}
> reader.Next()
> record := reader.Record()
> fmt.Println(record)
> }
> ```
> Thank you
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