spring-cloud / spring-cloud/spring-cloud-gateway

Binding to target org.springframework.cloud.gateway.config.GatewayProperties failed

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Description

I tried simple spring cloud gateway applicatinn and I'm getting this error, though I have provided the provided the configs in my application.properties.

***************************
APPLICATION FAILED TO START
***************************

Description:

Binding to target org.springframework.cloud.gateway.config.GatewayProperties failed:

    Property: spring.cloud.gateway.server.webflux.routes[0].uri
    Value: "null"
    Reason: must not be null


Action:

Update your application's configuration

application.properties
==============

spring.cloud.discovery.enabled=true
spring.cloud.gateway.routes[0].id = hello-world
spring.cloud.gateway.routes[0].uri = http://localhost:8085/
spring.cloud.gateway.routes[0].predicates[0] = Path=/hello

### TRIED THESE PROPERTIES ALSO #####
#spring.cloud.gateway.server.webflux.routes[0].id=hello-world
#spring.cloud.gateway.server.webflux.routes[0].uri=http://localhost:8085/
#spring.cloud.gateway.server.webflux.routes[0].predicates[0]=Path=/hello

pom.xml
======

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://maven.apache.org/POM/4.0.0"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <artifactId>gateway</artifactId>
    <groupId>org.example</groupId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <maven.compiler.source>21</maven.compiler.source>
        <maven.compiler.target>21</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-gateway-server-webflux</artifactId>
        </dependency>
        <!--<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-gateway-server</artifactId>
                </exclusion>
            </exclusions>
        </dependency>-->
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>2025.0.0</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

Main Application
============

@SpringBootApplication
public class GatewayApplication {
    public static void main(String[] args) {
        SpringApplication.run(GatewayApplication.class, args);
    }
}

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the startup failure with the provided application.properties and pom.xml, then inspect how the GatewayApplication loads the GatewayProperties route configuration. Done means the sample application starts successfully and the route's URI binds without the reported null-value error.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, spring, spring-boot
Domain
api, backend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
28/100

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