Bojidar Marinov created IGNITE-14369:
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Summary: Node.js: incorrect Hash Code calculcation
Key: IGNITE-14369
URL: https://issues.apache.org/jira/browse/IGNITE-14369
Project: Ignite
Issue Type: Bug
Components: thin client
Affects Versions: 2.10
Reporter: Bojidar Marinov
The Node.js thin client calculates wrong hashcodes, possibly leading to
duplicated rows and inability to read rows with complex key types written from
other languages:
# BinaryUtils.contentHashCode is called with wrong end parameter at
[BinaryObject.ts:397|https://github.com/apache/ignite-nodejs-thin-client/blob/76c7d7eb2b1856295f877434ef358beaa7155d91/src/BinaryObject.ts#L397].
The second parameter is the end position, not the content length, and thus
should be relative to this._startOffset.
Experimentally confirmed that changing to this._startOffset +
this._schemaOffset - 1 works.
# BinaryUtils.contentHashCode uses unsigned bytes at
[BinaryUtils.ts:632|https://github.com/apache/ignite-nodejs-thin-client/blob/76c7d7eb2b1856295f877434ef358beaa7155d91/src/internal/BinaryUtils.ts#L632].
[`buffer[idx]`|https://nodejs.org/api/buffer.html#buffer_buf_index] returns a
number between 0..255, while Java's byte is -128..127.
Experimentally confirmed that switching to
[Buffer.readInt8|https://nodejs.org/api/buffer.html#buffer_buf_readint8_offset]
works.
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