Issue with Manticore Search during Load Testing: "Syntax error, unexpected $end near ' '" and 500 Internal Server Error

Hello everyone,

I’m using Manticore Search (version 6.3.6) and have had great performance during regular queries. However, when performing load tests and reaching a certain number of connections, I encounter the following error:

{"error":"table de_de_products: P08: syntax error, unexpected $end near ' '"}
2024-10-07T19:27:56 
HTTP/1.1 500 Internal Server Error
Content-Length: 77
Content-Type: application/json; charset=UTF-8
Server: 6.3.6 593045790@24080214

It seems to indicate a syntax error in the query, but the same query works fine under normal conditions. The issue only appears when the system is under high load, causing the server to return a 500 Internal Server Error.

Has anyone encountered this before or have any ideas on how I can resolve this to ensure queries are processed correctly even under heavy load?

Thanks in advance!

How can I reproduce this?