Java Out Of Memory when generating a customized template

Description

I'm trying to generate a custom template using swagger-codegen-cli but i'm facing an out of memory problem.
I've already tried to increase Java Heap memory and I'd see the issue #6394 but it doesn't works for me either. (my JSON Spec doesn't have maxItems and minItems defined, but I tried setting maxItems to 2 and 10).

Command line used for generation

java -cp swagger-codegen-cli-2.4.13.jar:target/rsi-restassured-generator-1.0.0.jar io.swagger.codegen.Codegen -l RSI-RestAssured -i swagger.json -c config.json -o generated-code

Operational system and Java:

Ubuntu 20.04
openjdk version "1.8.0_252"
OpenJDK Runtime Environment (build 1.8.0_252-8u252-b09-1ubuntu1-b09)
OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)

Steps to reproduce

executing the "Command line used for generation" topic.

StackTrace

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at com.fasterxml.jackson.core.util.TextBuffer.carr(TextBuffer.java:886) at com.fasterxml.jackson.core.util.TextBuffer.expand(TextBuffer.java:847) at com.fasterxml.jackson.core.util.TextBuffer.append(TextBuffer.java:612) at com.fasterxml.jackson.core.io.SegmentedStringWriter.write(SegmentedStringWriter.java:58) at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator._flushBuffer(WriterBasedJsonGenerator.java:1994) at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator.writeRaw(WriterBasedJsonGenerator.java:597) at com.fasterxml.jackson.core.util.DefaultIndenter.writeIndentation(DefaultIndenter.java:91) at com.fasterxml.jackson.core.util.DefaultPrettyPrinter.writeEndObject(DefaultPrettyPrinter.java:333) at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator.writeEndObject(WriterBasedJsonGenerator.java:331) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:646) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:33) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeOptionalFields(MapSerializer.java:782) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:639) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:33) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serializeContents(ObjectArraySerializer.java:252) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize(ObjectArraySerializer.java:213) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize(ObjectArraySerializer.java:22) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeOptionalFields(MapSerializer.java:782) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:639) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:33) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serializeContents(ObjectArraySerializer.java:252) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize(ObjectArraySerializer.java:213) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize(ObjectArraySerializer.java:22) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeOptionalFields(MapSerializer.java:782) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:639) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:33) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serializeContents(ObjectArraySerializer.java:252) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize(ObjectArraySerializer.java:213) at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize(ObjectArraySerializer.java:22) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeOptionalFields(MapSerializer.java:782) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:639) at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:33)

Related issues/PRs

#6394

Start by reproducing the command shown with swagger-codegen-cli-2.4.13.jar, the custom RSI-RestAssured generator, swagger.json, and config.json. Read the Jackson serialization frames in the stack trace and compare the behavior with related issue #6394. Done means identifying the generation path that causes unbounded memory use and validating a fix against this reproduction.