Query by indexed query vector about elastiknn

[alexklibisz]

I don't see anything obviously wrong with the query.
The error indicates that JSON parsing fails at some point.
Can you post more of the stacktrace so I know at what stage in the query lifecycle this error is happening?

[techhero-es]

The full error message is
{ "error": { "root_cause": [ { "type": "", "reason": "Unexpected field: [field]; valid fields: : DownField(vec)" } ], "type": "", "reason": "Unexpected field: [field]; valid fields: : DownField(vec)" }, "status": 500 }

and the log just says
[2020-10-30T16:49:05,035][WARN ][r.suppressed ] [Matthiass-MacBook-Pro.local] path: /my-index/_search, params: {index=my-index} io.circe.DecodingFailure$$anon$2: Unexpected field: [field]; valid fields: : DownField(vec)

I am using elastiknn 0.1.0-PRE43_es7.6.2. I hope this helps. Is there a way to get a full stacktrace?

[alexklibisz]

Usually there are more messages surrounding the log warning. But it might depend on how you have Elasticsearch configured. I think the full error message and log error above are different errors. One says Unexpected field: [id] and the other says Unexpected field: [field].

In any case, I'm curious about a couple things:

• How are you submitting the queries? Python client? Bash/curl?
• Does the indexed-vector query work if you reference vectors from another index?

[techhero-es]

Upps, sorry. I was trying to remove fields from the query to see what happens and forgot to revert to my original query. I amended the error message in the comment above to match the query and log message.

I am using curl like this
curl -XPOST 'localhost:9200/my-index/_search' -H 'Content-Type: application/json' -d @querybyid.json
querybyid.json contains the query from above.

I created another index and referenced the query vector from there
{ "query": { "elastiknn_nearest_neighbors": { "field": "my_vec", "vec": { "index": "my-index-2", "field": "my_vec", "id": 1 }, "model": "exact", "similarity": "l1" } } }
This gives me the same error.

Thank you for your time.

[alexklibisz]

I think this might be more of a CURL and/or http issue.

This might work:

First, use "id": "1", since the id is a string.

Then, use --data-binary instead of -d.

curl -XPOST 'localhost:9200/my-index/_search' -H 'Content-Type: application/json' --data-binary @querybyid.json

See here for --data-binary reasoning.

[techhero-es]

It works! Specifying the id as a string did the trick.

Thank you!

[alexklibisz]

Great. I'll try to make that more clear in the docs or at least improve the error message.