Out of memory when running the swagger-codegen-maven-plugin

Description

mvn clean install fails with OutOfMemory with the following stack trace

[DEBUG] Ref property, simple name: WSContentInformation
[DEBUG] Resolving example for property io.swagger.models.properties.IntegerProperty@d7e9e510...
[DEBUG] Resolving example for property io.swagger.models.properties.DateTimeProperty@8e13ddb...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  35.036 s
[INFO] Finished at: 2021-01-28T02:27:46+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Java heap space -> [Help 1]
java.lang.OutOfMemoryError: Java heap space
    at com.fasterxml.jackson.core.util.TextBuffer.carr (TextBuffer.java:778)
    at com.fasterxml.jackson.core.util.TextBuffer.expand (TextBuffer.java:739)
    at com.fasterxml.jackson.core.util.TextBuffer.append (TextBuffer.java:502)
    at com.fasterxml.jackson.core.io.SegmentedStringWriter.write (SegmentedStringWriter.java:58)
    at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator._flushBuffer (WriterBasedJsonGenerator.java:1880)
    at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator.writeRaw (WriterBasedJsonGenerator.java:497)
    at com.fasterxml.jackson.core.util.DefaultIndenter.writeIndentation (DefaultIndenter.java:91)
    at com.fasterxml.jackson.core.util.DefaultPrettyPrinter.writeObjectEntrySeparator (DefaultPrettyPrinter.java:302)
    at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator._writePPFieldName (WriterBasedJsonGenerator.java:304)
    at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator._writeFieldName (WriterBasedJsonGenerator.java:145)
    at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator.writeFieldName (WriterBasedJsonGenerator.java:128)
    at com.fasterxml.jackson.databind.ser.std.StdKeySerializers$StringKeySerializer.serialize (StdKeySerializers.java:230)
    at com.fasterxml.jackson.databind.ser.std.StdKeySerializers$Dynamic.serialize (StdKeySerializers.java:199)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields (MapSerializer.java:610)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize (MapSerializer.java:536)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize (MapSerializer.java:30)
    at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serializeContents (ObjectArraySerializer.java:256)
    at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize (ObjectArraySerializer.java:216)
    at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize (ObjectArraySerializer.java:26)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields (MapSerializer.java:633)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize (MapSerializer.java:536)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize (MapSerializer.java:30)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields (MapSerializer.java:633)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize (MapSerializer.java:536)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize (MapSerializer.java:30)
    at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serializeContents (ObjectArraySerializer.java:256)
    at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize (ObjectArraySerializer.java:216)
    at com.fasterxml.jackson.databind.ser.std.ObjectArraySerializer.serialize (ObjectArraySerializer.java:26)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields (MapSerializer.java:633)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize (MapSerializer.java:536)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize (MapSerializer.java:30)
    at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields (MapSerializer.java:633)
[ERROR] 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/OutOfMemoryError

Swagger-codegen version

Version 2.3.1 of the plugin.

The issue is not present for version 2.2.3 of the plugin.

Swagger declaration file content or url

https://www.friscris.be/ws/api/516/swagger.json

Command line used for generation

mvn clean install

plugin config in pom.xml:

<plugin>
    <groupId>io.swagger</groupId>
    <artifactId>swagger-codegen-maven-plugin</artifactId>
    <version>${swagger-codegen-maven-plugin-version}</version>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
            <configuration>
                <inputSpec> https://www.friscris.be/ws/api/516/swagger.json</inputSpec>
                <language>java</language>
                <!--<library>okhttp-gson</library>-->
                <library>resttemplate</library>
                <generateApis>true</generateApis>
                <generateApiDocumentation>false</generateApiDocumentation>
                <generateApiTests>false</generateApiTests>
                <generateModels>true</generateModels>
                <generateModelDocumentation>false</generateModelDocumentation>
                <generateModelTests>false</generateModelTests>
                <withXml>false</withXml>
                <configOptions>
                    <dateLibrary>java8</dateLibrary>
                    <sourceFolder>swagger</sourceFolder>
                </configOptions>
                <output>target/generated-sources/swagger</output>
            </configuration>
        </execution>
    </executions>
</plugin>

Reproduce the failure with the pom.xml plugin configuration, mvn clean install, and the linked swagger.json input. Start by tracing the generation path associated with the Jackson serialization stack trace and compare plugin versions 2.3.1 and 2.2.3. Done means the provided specification generates successfully without Java heap space exhaustion.