[jira] [Created] (ARROW-6574) [JS] TypeError with utf8 and JSONVectorLoader.readData

[Adam M Krebs (Jira)]

Adam M Krebs created ARROW-6574:
-----------------------------------

             Summary: [JS] TypeError with utf8 and JSONVectorLoader.readData
                 Key: ARROW-6574
                 URL: https://issues.apache.org/jira/browse/ARROW-6574
             Project: Apache Arrow
          Issue Type: Bug
          Components: JavaScript
    Affects Versions: 0.14.1
         Environment: node v10.16.0, OSX 10.14.5
            Reporter: Adam M Krebs


Minimal repro:

 
{code:javascript}
const fields = [
  {
    name: 'first_name',
    type: {name: 'utf8'},
    nullable: false,
    children: [],
  },
];

Table.from({
  schema: {fields},
  batches: [{
    count: 1,
    columns: [{
      name: 'first_name',
      count: 1,
      VALIDITY: [],
      DATA: ['Fred']
    }]
  }]
});{code}
 

Output:
{code:java}
/[snip]/node_modules/apache-arrow/visitor/vectorloader.js:92
    readData(type, { offset } = this.nextBufferRange()) {
                     ^TypeError: Cannot destructure property `offset` of 
'undefined' or 'null'.
    at JSONVectorLoader.readData 
(/[snip]/node_modules/apache-arrow/visitor/vectorloader.js:92:38)
    at JSONVectorLoader.visitUtf8 
(/[snip]/node_modules/apache-arrow/visitor/vectorloader.js:46:188)
    at JSONVectorLoader.visit 
(/[snip]/node_modules/apache-arrow/visitor.js:28:48)
    at JSONVectorLoader.visit 
(/[snip]/node_modules/apache-arrow/visitor/vectorloader.js:40:22)
    at nodes.map (/[snip]/node_modules/apache-arrow/visitor.js:25:44)
    at Array.map (<anonymous>)
    at JSONVectorLoader.visitMany 
(/[snip]/node_modules/apache-arrow/visitor.js:25:22)
    at RecordBatchJSONReaderImpl._loadVectors 
(/[snip]/node_modules/apache-arrow/ipc/reader.js:523:107)
    at RecordBatchJSONReaderImpl._loadRecordBatch 
(/[snip]/node_modules/apache-arrow/ipc/reader.js:209:79)
    at RecordBatchJSONReaderImpl.next 
(/[snip]/node_modules/apache-arrow/ipc/reader.js:280:42){code}
 

 

Looks like the `nextBufferRange` call is returning `undefined`, due to an 
out-of-bounds `buffersIndex`.

 

Happy to provide more info if needed. Seems to only affect utf8 types and 
nothing else.

 



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