Update extensions/datasource/deployment/src/main/java/io/quarkus/datasource/deployment/devservices/DevServicesDatasourceProcessor.java

Co-authored-by: Yoann Rodière <[email protected]>

Author: geoand

extensions/datasource/deployment/src/main/java/io/quarkus/datasource/deployment/devservices/DevServicesDatasourceProcessor.java

@@ -243,9 +243,10 @@ private RunningDevService startDevDb(
         }
 
         if (useSharedNetwork && dataSourceBuildTimeConfig.devservices().port().isPresent()) {
-            log.warnf(
-                    "Port %d will be ignored as the Dev Service for datasource %s is using shared network port for datasource ",
-                    dataSourceBuildTimeConfig.devservices().port().getAsInt(), dataSourcePrettyName);
+            throw new ConfigurationException(String.format(Locale.ROOT,
+                    "Cannot set a port for the Dev Service of datasource '%s' using '%s', because it is using a shared network, which disables port mapping",
+                    DataSourceUtil.dataSourcePropertyKey(dbName, "devservices.port"),
+                    dataSourcePrettyName));
         }
 
         Boolean enabled = dataSourceBuildTimeConfig.devservices().enabled().orElse(!hasNamedDatasources);