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 bade86348d6d..731115881f00 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
@@ -66,6 +66,7 @@
 import org.openapitools.codegen.utils.OneOfImplementorAdditionalData;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import static org.openapitools.codegen.utils.OnceLogger.once;
 
 import java.io.File;
 import java.util.*;
@@ -1654,7 +1655,7 @@ public void setParameterExampleValue(CodegenParameter codegenParameter, RequestB
 
         if (content.size() > 1) {
             // @see ModelUtils.getSchemaFromContent()
-            LOGGER.warn("Multiple MediaTypes found, using only the first one");
+            once(LOGGER).warn("Multiple MediaTypes found, using only the first one");
         }
 
         MediaType mediaType = content.values().iterator().next();
@@ -3530,7 +3531,7 @@ public CodegenParameter fromParameter(Parameter parameter, Set<String> imports)
         } else if (parameter.getContent() != null) {
             Content content = parameter.getContent();
             if (content.size() > 1) {
-                LOGGER.warn("Multiple schemas found in content, returning only the first one");
+                once(LOGGER).warn("Multiple schemas found in content, returning only the first one");
             }
             MediaType mediaType = content.values().iterator().next();
             s = mediaType.getSchema();
@@ -3884,7 +3885,7 @@ public List<CodegenSecurity> fromSecurity(Map<String, SecurityScheme> securitySc
                     // As of January 2020, the "signature" scheme has not been registered with IANA yet.
                     // This scheme may have to be changed when it is officially registered with IANA.
                     cs.isHttpSignature = true;
-                    LOGGER.warn("Security scheme 'HTTP signature' is a draft IETF RFC and subject to change.");
+                    once(LOGGER).warn("Security scheme 'HTTP signature' is a draft IETF RFC and subject to change.");
                 }
             } else if (SecurityScheme.Type.OAUTH2.equals(securityScheme.getType())) {
                 cs.isKeyInHeader = cs.isKeyInQuery = cs.isKeyInCookie = cs.isApiKey = cs.isBasic = false;
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java
index 44373cd8c3bd..e55479e4a31f 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java
@@ -985,7 +985,7 @@ private static Schema getSchemaFromContent(Content content) {
         if (content.size() > 1) {
             // Other content types are currently ignored by codegen. If you see this warning,
             // reorder the OAS spec to put the desired content type first.
-            LOGGER.warn("Multiple schemas found in the OAS 'content' section, returning only the first one ({})",
+            once(LOGGER).warn("Multiple schemas found in the OAS 'content' section, returning only the first one ({})",
                 entry.getKey());
         }
         return entry.getValue().getSchema();