Spring Cloud Gateway does not route to destination service

Question

I am trying to implement micro-service architecture for my spring project. So far the Eureka service is working fine and registering the GATEWAY & other required services. The problem is occurring in the GATEWAY service while accessing the other services through GATEWAY services.

Let's say our main service A is running on PORT 8080 and GATEWAY is running on PORT 8091. So we are using the URL: http://<IP_ADDRESS where deployed>:8091/crca/api/phoenix/users to access the service A on port 8080.

On hitting the above URL returns the below error:

I traced the error log and found that it is throwing java.net.UnknownHostException error. I saw many articles regarding this but found no perfect solution. I also followed this question as the error log was exact the same as this but nothing helped.

Error Log

application.yml

server:
  port: 8091
  servlet:
    context-path: /crca/api
#eureka:
#  instance:
#    hostname: localhost
eureka:
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://<HOST_IP ADDRESS>:8099/server/crca/api/eureka  instance:
    hostname: <HOST_IP ADDRESS>
    prefer-ip-address: true
spring:
  application:
    name: api-gateway-service
  cloud:
    gateway:
      routes:
        - id: phoenix-service
          uri: lb://phoenix-service
          predicates:
            - Path=/crca/api/phoenix/**
        - id: statesville-service
          uri: lb://statesville-service
          predicates:
            - Path=/crca/api/statesville/**

pom.xml

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>2020.0.4</spring-cloud.version>
</properties>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-gateway</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        <version>2.2.7.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-circuitbreaker-reactor-resilience4j</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>${project.parent.version}</version>
        </plugin>
    </plugins>
</build>

The server used for deployment: IBM AS400 server

NOTE: The above solution is working fine locally by connecting to the DB2 database on the same server. This is not working only after deployment.

Spring Cloud Gateway does not route to destination service

0 Answers0