diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index aef49fd28e5..e0936c09b22 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -739,6 +739,16 @@ public class DefaultCodegen implements CodegenConfig {
         return name;
     }
 
+    /**
+     * Return the parameter name of array of model
+     *
+     * @param name name of the array model
+     * @return the sanitized parameter name
+     */
+    public String toArrayModelParamName(String name) {
+        return toParamName(name);
+    }
+
     /**
      * Return the Enum name (e.g. StatusEnum given 'status')
      *
@@ -4232,7 +4242,7 @@ public class DefaultCodegen implements CodegenConfig {
                 innerCp = innerCp.items;
             }
             codegenParameter.baseName = mostInnerItem.complexType;
-            codegenParameter.paramName = toParamName(mostInnerItem.complexType);
+            codegenParameter.paramName = toArrayModelParamName(mostInnerItem.complexType);
             codegenParameter.items = codegenProperty.items;
             codegenParameter.dataType = getTypeDeclaration(arraySchema);
             codegenParameter.baseType = getSchemaType(arraySchema);
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ErlangClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ErlangClientCodegen.java
index 1cb413dda00..323e81d6c71 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ErlangClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ErlangClientCodegen.java
@@ -51,11 +51,11 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
 
         setReservedWordsLowerCase(
                 Arrays.asList(
-                    "after","and","andalso","band","begin","bnot","bor","bsl","bsr","bxor","case",
-                    "catch","cond","div","end","fun","if","let","not","of","or","orelse","receive",
-                    "rem","try","when","xor"
-                    )
-                );
+                        "after", "and", "andalso", "band", "begin", "bnot", "bor", "bsl", "bsr", "bxor", "case",
+                        "catch", "cond", "div", "end", "fun", "if", "let", "not", "of", "or", "orelse", "receive",
+                        "rem", "try", "when", "xor"
+                )
+        );
 
         instantiationTypes.clear();
 
@@ -109,12 +109,11 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
     public String getSchemaType(Schema p) {
         String schemaType = super.getSchemaType(p);
         String type = null;
-        if(typeMapping.containsKey(schemaType)) {
+        if (typeMapping.containsKey(schemaType)) {
             type = typeMapping.get(schemaType);
-            if(languageSpecificPrimitives.contains(type))
+            if (languageSpecificPrimitives.contains(type))
                 return (type);
-        }
-        else
+        } else
             type = getTypeDeclaration(toModelName(snakeCase(schemaType)));
         return type;
     }
@@ -125,15 +124,13 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
 
         if (additionalProperties.containsKey(CodegenConstants.PACKAGE_NAME)) {
             setPackageName((String) additionalProperties.get(CodegenConstants.PACKAGE_NAME));
-        }
-        else {
+        } else {
             setPackageName("swagger");
         }
 
         if (additionalProperties.containsKey(CodegenConstants.PACKAGE_VERSION)) {
             setPackageVersion((String) additionalProperties.get(CodegenConstants.PACKAGE_VERSION));
-        }
-        else {
+        } else {
             setPackageVersion("1.0.0");
         }
 
@@ -157,7 +154,7 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
         modelPackage = packageName;
         apiPackage = packageName;
 
-        supportingFiles.add(new SupportingFile("rebar.config.mustache","", "rebar.config"));
+        supportingFiles.add(new SupportingFile("rebar.config.mustache", "", "rebar.config"));
         supportingFiles.add(new SupportingFile("app.src.mustache", "", "src" + File.separator + this.packageName + ".app.src"));
         supportingFiles.add(new SupportingFile("utils.mustache", "", "src" + File.separator + this.packageName + "_utils.erl"));
         supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
@@ -177,8 +174,7 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
     }
 
     @Override
-    public String escapeReservedWord(String name)
-    {
+    public String escapeReservedWord(String name) {
         // Can't start with an underscore, as our fields need to start with an
         // UppercaseLetter so that Go treats them as public/visible.
 
@@ -190,7 +186,7 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
         // - X_Name
         // ... or maybe a suffix?
         // - Name_ ... think this will work.
-        if(this.reservedWordsMappings().containsKey(name)) {
+        if (this.reservedWordsMappings().containsKey(name)) {
             return this.reservedWordsMappings().get(name);
         }
         return camelize(name) + '_';
@@ -222,6 +218,20 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
         return camelize(toVarName(name));
     }
 
+    @Override
+    public String toArrayModelParamName(String name) {
+        if (name == null) {
+            LOGGER.warn("parameter name for array model is null. Default to 'array_model'.");
+            name = "array_model";
+        }
+
+        if (name.indexOf(":") > 0) {
+            name = name.substring(0, name.indexOf(":")) + "_array";
+        }
+
+        return toParamName(name);
+    }
+
     @Override
     public String toModelName(String name) {
         return this.packageName + "_" + underscore(name.replaceAll("-", "_").replaceAll("\\.", "_"));
@@ -383,8 +393,8 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
             this.produces = o.produces;
             this.bodyParam = o.bodyParam;
             this.allParams = o.allParams;
-            this.arityRequired = Integer.toString(lengthRequired(o.allParams)+1);
-            this.arityOptional = Integer.toString(lengthRequired(o.allParams)+2);
+            this.arityRequired = Integer.toString(lengthRequired(o.allParams) + 1);
+            this.arityOptional = Integer.toString(lengthRequired(o.allParams) + 2);
             this.bodyParams = o.bodyParams;
             this.pathParams = o.pathParams;
             this.queryParams = o.queryParams;
diff --git a/samples/client/petstore/erlang-client/.swagger-codegen/VERSION b/samples/client/petstore/erlang-client/.swagger-codegen/VERSION
index cc6612c36e0..096bf47efe3 100644
--- a/samples/client/petstore/erlang-client/.swagger-codegen/VERSION
+++ b/samples/client/petstore/erlang-client/.swagger-codegen/VERSION
@@ -1 +1 @@
-2.3.0
\ No newline at end of file
+3.0.0-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/erlang-client/src/petstore_pet_api.erl b/samples/client/petstore/erlang-client/src/petstore_pet_api.erl
index 88e9829da62..bbb664f66bd 100644
--- a/samples/client/petstore/erlang-client/src/petstore_pet_api.erl
+++ b/samples/client/petstore/erlang-client/src/petstore_pet_api.erl
@@ -12,12 +12,13 @@
 -define(BASE_URL, "/v2").
 
 %% @doc Add a new pet to the store
+%% 
 -spec add_pet(ctx:ctx(), petstore_pet:petstore_pet()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-add_pet(Ctx, Body) ->
-    add_pet(Ctx, Body, #{}).
+add_pet(Ctx, PetstorePet) ->
+    add_pet(Ctx, PetstorePet, #{}).
 
 -spec add_pet(ctx:ctx(), petstore_pet:petstore_pet(), maps:map()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-add_pet(Ctx, Body, Optional) ->
+add_pet(Ctx, PetstorePet, Optional) ->
     _OptionalParams = maps:get(params, Optional, #{}),
     Cfg = maps:get(cfg, Optional, application:get_env(kuberl, config, #{})),
 
@@ -25,13 +26,14 @@ add_pet(Ctx, Body, Optional) ->
     Path = ["/pet"],
     QS = [],
     Headers = [],
-    Body1 = Body,
+    Body1 = PetstorePet,
     ContentTypeHeader = petstore_utils:select_header_content_type([<<"application/json">>, <<"application/xml">>]),
     Opts = maps:get(hackney_opts, Optional, []),
 
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Deletes a pet
+%% 
 -spec delete_pet(ctx:ctx(), integer()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
 delete_pet(Ctx, PetId) ->
     delete_pet(Ctx, PetId, #{}).
@@ -115,12 +117,13 @@ get_pet_by_id(Ctx, PetId, Optional) ->
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Update an existing pet
+%% 
 -spec update_pet(ctx:ctx(), petstore_pet:petstore_pet()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-update_pet(Ctx, Body) ->
-    update_pet(Ctx, Body, #{}).
+update_pet(Ctx, PetstorePet) ->
+    update_pet(Ctx, PetstorePet, #{}).
 
 -spec update_pet(ctx:ctx(), petstore_pet:petstore_pet(), maps:map()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-update_pet(Ctx, Body, Optional) ->
+update_pet(Ctx, PetstorePet, Optional) ->
     _OptionalParams = maps:get(params, Optional, #{}),
     Cfg = maps:get(cfg, Optional, application:get_env(kuberl, config, #{})),
 
@@ -128,13 +131,14 @@ update_pet(Ctx, Body, Optional) ->
     Path = ["/pet"],
     QS = [],
     Headers = [],
-    Body1 = Body,
+    Body1 = PetstorePet,
     ContentTypeHeader = petstore_utils:select_header_content_type([<<"application/json">>, <<"application/xml">>]),
     Opts = maps:get(hackney_opts, Optional, []),
 
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Updates a pet in the store with form data
+%% 
 -spec update_pet_with_form(ctx:ctx(), integer()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
 update_pet_with_form(Ctx, PetId) ->
     update_pet_with_form(Ctx, PetId, #{}).
@@ -155,6 +159,7 @@ update_pet_with_form(Ctx, PetId, Optional) ->
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc uploads an image
+%% 
 -spec upload_file(ctx:ctx(), integer()) -> {ok, petstore_api_response:petstore_api_response(), petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
 upload_file(Ctx, PetId) ->
     upload_file(Ctx, PetId, #{}).
diff --git a/samples/client/petstore/erlang-client/src/petstore_store_api.erl b/samples/client/petstore/erlang-client/src/petstore_store_api.erl
index edb764f1d94..178cd0a2cb2 100644
--- a/samples/client/petstore/erlang-client/src/petstore_store_api.erl
+++ b/samples/client/petstore/erlang-client/src/petstore_store_api.erl
@@ -71,12 +71,13 @@ get_order_by_id(Ctx, OrderId, Optional) ->
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Place an order for a pet
+%% 
 -spec place_order(ctx:ctx(), petstore_order:petstore_order()) -> {ok, petstore_order:petstore_order(), petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-place_order(Ctx, Body) ->
-    place_order(Ctx, Body, #{}).
+place_order(Ctx, PetstoreOrder) ->
+    place_order(Ctx, PetstoreOrder, #{}).
 
 -spec place_order(ctx:ctx(), petstore_order:petstore_order(), maps:map()) -> {ok, petstore_order:petstore_order(), petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-place_order(Ctx, Body, Optional) ->
+place_order(Ctx, PetstoreOrder, Optional) ->
     _OptionalParams = maps:get(params, Optional, #{}),
     Cfg = maps:get(cfg, Optional, application:get_env(kuberl, config, #{})),
 
@@ -84,7 +85,7 @@ place_order(Ctx, Body, Optional) ->
     Path = ["/store/order"],
     QS = [],
     Headers = [],
-    Body1 = Body,
+    Body1 = PetstoreOrder,
     ContentTypeHeader = petstore_utils:select_header_content_type([]),
     Opts = maps:get(hackney_opts, Optional, []),
 
diff --git a/samples/client/petstore/erlang-client/src/petstore_user_api.erl b/samples/client/petstore/erlang-client/src/petstore_user_api.erl
index d6b95213fbf..b1f07026be8 100644
--- a/samples/client/petstore/erlang-client/src/petstore_user_api.erl
+++ b/samples/client/petstore/erlang-client/src/petstore_user_api.erl
@@ -14,11 +14,11 @@
 %% @doc Create user
 %% This can only be done by the logged in user.
 -spec create_user(ctx:ctx(), petstore_user:petstore_user()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-create_user(Ctx, Body) ->
-    create_user(Ctx, Body, #{}).
+create_user(Ctx, PetstoreUser) ->
+    create_user(Ctx, PetstoreUser, #{}).
 
 -spec create_user(ctx:ctx(), petstore_user:petstore_user(), maps:map()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-create_user(Ctx, Body, Optional) ->
+create_user(Ctx, PetstoreUser, Optional) ->
     _OptionalParams = maps:get(params, Optional, #{}),
     Cfg = maps:get(cfg, Optional, application:get_env(kuberl, config, #{})),
 
@@ -26,19 +26,20 @@ create_user(Ctx, Body, Optional) ->
     Path = ["/user"],
     QS = [],
     Headers = [],
-    Body1 = Body,
+    Body1 = PetstoreUser,
     ContentTypeHeader = petstore_utils:select_header_content_type([]),
     Opts = maps:get(hackney_opts, Optional, []),
 
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Creates list of users with given input array
+%% 
 -spec create_users_with_array_input(ctx:ctx(), list()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-create_users_with_array_input(Ctx, Body) ->
-    create_users_with_array_input(Ctx, Body, #{}).
+create_users_with_array_input(Ctx, PetstoreUserArray) ->
+    create_users_with_array_input(Ctx, PetstoreUserArray, #{}).
 
 -spec create_users_with_array_input(ctx:ctx(), list(), maps:map()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-create_users_with_array_input(Ctx, Body, Optional) ->
+create_users_with_array_input(Ctx, PetstoreUserArray, Optional) ->
     _OptionalParams = maps:get(params, Optional, #{}),
     Cfg = maps:get(cfg, Optional, application:get_env(kuberl, config, #{})),
 
@@ -46,19 +47,20 @@ create_users_with_array_input(Ctx, Body, Optional) ->
     Path = ["/user/createWithArray"],
     QS = [],
     Headers = [],
-    Body1 = Body,
+    Body1 = PetstoreUserArray,
     ContentTypeHeader = petstore_utils:select_header_content_type([]),
     Opts = maps:get(hackney_opts, Optional, []),
 
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Creates list of users with given input array
+%% 
 -spec create_users_with_list_input(ctx:ctx(), list()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-create_users_with_list_input(Ctx, Body) ->
-    create_users_with_list_input(Ctx, Body, #{}).
+create_users_with_list_input(Ctx, PetstoreUserArray) ->
+    create_users_with_list_input(Ctx, PetstoreUserArray, #{}).
 
 -spec create_users_with_list_input(ctx:ctx(), list(), maps:map()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-create_users_with_list_input(Ctx, Body, Optional) ->
+create_users_with_list_input(Ctx, PetstoreUserArray, Optional) ->
     _OptionalParams = maps:get(params, Optional, #{}),
     Cfg = maps:get(cfg, Optional, application:get_env(kuberl, config, #{})),
 
@@ -66,7 +68,7 @@ create_users_with_list_input(Ctx, Body, Optional) ->
     Path = ["/user/createWithList"],
     QS = [],
     Headers = [],
-    Body1 = Body,
+    Body1 = PetstoreUserArray,
     ContentTypeHeader = petstore_utils:select_header_content_type([]),
     Opts = maps:get(hackney_opts, Optional, []),
 
@@ -94,6 +96,7 @@ delete_user(Ctx, Username, Optional) ->
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Get user by user name
+%% 
 -spec get_user_by_name(ctx:ctx(), binary()) -> {ok, petstore_user:petstore_user(), petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
 get_user_by_name(Ctx, Username) ->
     get_user_by_name(Ctx, Username, #{}).
@@ -114,6 +117,7 @@ get_user_by_name(Ctx, Username, Optional) ->
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Logs user into the system
+%% 
 -spec login_user(ctx:ctx(), binary(), binary()) -> {ok, binary(), petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
 login_user(Ctx, Username, Password) ->
     login_user(Ctx, Username, Password, #{}).
@@ -134,6 +138,7 @@ login_user(Ctx, Username, Password, Optional) ->
     petstore_utils:request(Ctx, Method, [?BASE_URL, Path], QS, ContentTypeHeader++Headers, Body1, Opts, Cfg).
 
 %% @doc Logs out current logged in user session
+%% 
 -spec logout_user(ctx:ctx()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
 logout_user(Ctx) ->
     logout_user(Ctx, #{}).
@@ -156,11 +161,11 @@ logout_user(Ctx, Optional) ->
 %% @doc Updated user
 %% This can only be done by the logged in user.
 -spec update_user(ctx:ctx(), binary(), petstore_user:petstore_user()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-update_user(Ctx, Username, Body) ->
-    update_user(Ctx, Username, Body, #{}).
+update_user(Ctx, Username, PetstoreUser) ->
+    update_user(Ctx, Username, PetstoreUser, #{}).
 
 -spec update_user(ctx:ctx(), binary(), petstore_user:petstore_user(), maps:map()) -> {ok, [], petstore_utils:response_info()} | {ok, hackney:client_ref()} | {error, term(), petstore_utils:response_info()}.
-update_user(Ctx, Username, Body, Optional) ->
+update_user(Ctx, Username, PetstoreUser, Optional) ->
     _OptionalParams = maps:get(params, Optional, #{}),
     Cfg = maps:get(cfg, Optional, application:get_env(kuberl, config, #{})),
 
@@ -168,7 +173,7 @@ update_user(Ctx, Username, Body, Optional) ->
     Path = ["/user/", Username, ""],
     QS = [],
     Headers = [],
-    Body1 = Body,
+    Body1 = PetstoreUser,
     ContentTypeHeader = petstore_utils:select_header_content_type([]),
     Opts = maps:get(hackney_opts, Optional, []),