[BUG] OutOfMemeoryError: Java heap space - Potential memory leak?

Bug Report Checklist

• [ x] Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When downloading the binary and running it against a specific yaml and error is thrown:

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
	at com.fasterxml.jackson.core.util.TextBuffer.carr(TextBuffer.java:1235)
	at com.fasterxml.jackson.core.util.TextBuffer.expand(TextBuffer.java:1191)
	at com.fasterxml.jackson.core.util.TextBuffer.append(TextBuffer.java:861)
	at com.fasterxml.jackson.core.io.SegmentedStringWriter.write(SegmentedStringWriter.java:78)
        at ...

I have tried increasing the maximum memory allocation by using -Xmx=24g. I don't think that there should be any reason to require any more than that. I assume there is a potential memory-leak

openapi-generator version

❯ java -jar openapi-generator-cli.jar version
7.22.0

OpenAPI declaration file content or url

Tripletex API: https://tripletex.no/v2/openapi.json

Generation Details

Attached is the log of the execution run. No other config is changed.

log.txt

Steps to reproduce

1. Installed the binary directly using the wget ... command as provided in the readme.
2. Executed the following:

java -jar -Xmx24G openapi-generator-cli.jar generate -i https://tripletex.no/v2/openapi.json -g python -o .

Start by running the documented Java command with openapi-generator-cli 7.22.0 against the Tripletex OpenAPI URL and review log.txt alongside the OutOfMemoryError stack trace. Trace whether the failure is specific to Python generation or the input document. Done means the cause is isolated and generation completes within reasonable memory, or the issue is reduced to a reproducible generator defect with a focused failing case.