[jira] [Created] (ARROW-11326) utf8 vector buffers don't work if allocated within Web Assembly memory of Node.js

["Dmitri Bronnikov (Jira)" <ji...@apache.org>]

Dmitri Bronnikov created ARROW-11326:
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             Summary: utf8 vector buffers don't work if allocated within Web Assembly memory of Node.js
                 Key: ARROW-11326
                 URL: https://issues.apache.org/jira/browse/ARROW-11326
             Project: Apache Arrow
          Issue Type: Bug
          Components: JavaScript
         Environment: node.js in Mac book pro
            Reporter: Dmitri Bronnikov


After making int32array of offsets = [0, 1] and uint8array of values c[ascii_code('A')]create a vector of strings:

const vec = arrow.Vector.new(arrow.Data.new(new Utf8(), 0, 1, 0, [offsets, values, null, null])

then access the first and only element:

console.log(vec.get(0))

Works within browsers. Works in node.js with fixed size types, e.g. float or integer.

Fails in node.js with this callstack

at ../../node_modules/@apache-arrow/es2015-umd/buffer/index.js:311:1
   at __proto__ (../../node_modules/@apache-arrow/es2015-umd/buffer/index.js:167:1)
   at Function._Buffer [as from] (../../node_modules/@apache-arrow/es2015-umd/buffer/index.js:154:1)
   at prototype (../../node_modules/@apache-arrow/es2015-umd/util/utf8.ts:43:31)
   at partial2 (../../node_modules/@apache-arrow/es2015-umd/visitor/get.ts:293:12)
   at go.isArray [as get] (../../node_modules/@apache-arrow/es2015-umd/vector/index.ts:175:43)
   at Sr.get (../../node_modules/@apache-arrow/es2015-umd/util/args.ts:27:7)



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