Spring-cloud-netflix: Connection refused while trying to register eureka-clients

[pkuerzer]

I have one eureka-server running on a linux(testsrv1) machine. I'm able to register services when they run on the same linux machine. Now I want to register a service running on my localhost. But I'm bot able to register this service.
I get this exception:

2016-08-31 09:17:31.917 ERROR 27105 --- [freshExecutor-0] c.n.d.s.t.d.RedirectingEurekaHttpClient  : Request execution error
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
Caused by: java.net.ConnectException: Connection refused
2016-08-31 09:17:31.917  WARN 27105 --- [freshExecutor-0] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failure
2016-08-31 09:17:31.918 ERROR 27105 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_RESERVATION-SERVICE/testsrv1.myDomain.lan:reservation-service:8002 - was unable to refresh its cache! status = Cannot execute request on any known server
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
2016-08-31 09:17:31.924 ERROR 27105 --- [tbeatExecutor-0] c.n.d.s.t.d.RedirectingEurekaHttpClient  : Request execution error

My Eureka-Server has this properties:

spring.application.name=eureka-service
spring.cloud.config.uri=http://myLocalMachine.myDomain.lan:8888
server.port=8761
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

My Client-service has this properties:

spring:
  application:
    name: reservation-service
  cloud:
    config:
      uri: http://myLocalMachine.myDomain.lan:8888
server:
  port: 8002
eureka:
  client:
    service-url:
     defaultzone: http://testsrv1:8761/eureka/

The Eureka-Server is abel to reach the cloud-config-files from my config-service running on localhost.

Is there any configuration missing or do I need the cloud foundry?

Thanks in advance!

[spencergibb]

There are no constraints on the eureka server from accepting connection from the outside. It's just a standard spring boot app. No cloud foundry needed. There must be some problem with your environment. Can localhost reach testsrv1?

[pkuerzer]

Yes I can reach the eureka dashboard from my localhost for example. Eureka server can also reach the config-service running on my localhost. So I think this should be fine. But from your point of view the configuration files are good? And in theorie it should work as it is configured?

[spencergibb]

config looks fine. Not sure how I'd help debug a connection refused. My guess is a sample project might not even help, but could try.

[ryanjbaxter]

There wouldn't happen to be any configuration from the config server that is overriding the defaultzone property, is there?

[pkuerzer]

First, thanks for your responses. At the end all the services are sample projects and I also think a connection reset is very hard to reproduce. But I will show you my Spring-boot-application configuration. Maybe I missed some annotation on application level.

Eureka:

@SpringBootApplication
@EnableEurekaServer
public class EurekaServiceApplication {

Service:

@SpringBootApplication
@EnableDiscoveryClient
@EnableEurekaClient
public class ReservationServiceApplication {

When I run all my services and eureka on the same host (local or linux machine) everything works fine.
I will check if there is any overriding property and will also try to check the connectivity or use other server.

[ryanjbaxter]

In the service you don't need both @EnableDiscoveryClient and @EnableEurekaClient one or the other should do.

[pkuerzer]

I'm still checking why I get the connection reset exception. Just captured some traffic using wireshark and RawCap.
I can see http requests from my service to the config server:

GET /reservation-service/default HTTP/1.1
Accept: application/json, application/*+json
User-Agent: Java/1.8.0_77
Host: KBHWS242.eurotours.lan:8888
Connection: keep-alive

HTTP/1.1 200 
X-Application-Context: application:8888
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Date: Fri, 02 Sep 2016 13:54:07 GMT

123
{"name":"reservation-service","profiles":["default"],"label":"master","version":"a30016147d52b0bcf71f20ee22b5751417ddebe1","propertySources":[{"name":"C:\\DATA\\micro-service-config/reservation-service.yml","source":{"eureka.client.service-url.defaultzone":"http://testsrv1:8761/eureka/"}}]}

So the right configuration is sent back to the service. But I do not see any requests to the eureka service running on testsrv1 (linux machine). The service should also send some http requests to testsrv1, right?

What I see are tcp calls to localhost:8761 which could describe the connection reset error. And I do not see any tcp/http request to testsrv1(or IP of it). Seems a litte bit that the config is not right updated!?

[ryanjbaxter]

Maybe showing looking at the output of '/env' to see the environment of the app might help. Can at least verify that the correct defaultzone location is being used.

[pkuerzer]

After days, looking thousand times on the same config file I realized the issue. At the end it was just a misspelling of defaultzone. After changing it to defaultZone everything works like expected.
Thank you very much for your time.

[alok001]

Hi All

I have tried creating the eureka discovery server but still facing the issue.

application.yml
spring:
application:
name: VehicleEureka-client

eureka:
client:
register-with-eureka: true
fetch-registry: true
service-url:
defaultZone: http://192.168.0.6:8700/eureka/
instance:
hostname: localhost

  **pom.xml**

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0

<groupId>com.Vehicle</groupId>
<artifactId>VehicleEureka-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>VehicleEureka-client</name>
<description>Demo project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.9.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <spring-cloud.version>Edgware.RELEASE</spring-cloud.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-eureka</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>Edgware.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

Client
@EnableDiscoveryClient
@SpringBootApplication
public class VehicleEurekaClientApplication {

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

}

Error:
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
Request execution failed with message: java.net.ConnectException: Connection refused: connect

Can one please suggest what has to be changed _Need help here_

[spencergibb]

@alok001 please stop repeating your issue in multiple places, this is the third or fourth one. It's holidays in the US and the weekend, please be patient.

[ranesaci]

Guys, I was also facing same issue. I solved this issue with below process.

Error:
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
Request execution failed with message: java.net.ConnectException: Connection refused: connect

Solution:

http://sachin4java.blogspot.in/2017/12/cndstdredirectingeurekahttpclient.html

Hope, this will save your time.

[spencergibb]

defaultZone is a key in a map, therefore not subject to boot relaxed binding. It's format sensitive

[rahula072]

i am getting the same error while starting eureka server. please help me to resolve this issue

My pom.xml

org.springframework.boot
spring-boot-starter-parent
1.5.6.RELEASE

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <spring-cloud.version>Dalston.SR4</spring-cloud.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-eureka-server</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>
        </plugin>
    </plugins>
</build>

application.yml

spring:
application:
name: cloud-service

eureka:
client:
register-with-eureka: false
fetch-registry: false
service-url:
defaultZone: http://localhost:9002/eureka/
instance:
hostname: localhost

client

@EnableEurekaServer
@SpringBootApplication
public class MyController {

public static void main(String[] args) {
    SpringApplication.run(MyController.class, args);

}

}

error

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar:1.19.1]
at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.6.2.jar:1.6.2]
at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:509) ~[jersey-client-1.19.1.jar:1.19.1]

[ranesaci]

@rahula072 -

Can you please make it

application.yml

spring:
application:
name: cloud-service

eureka:
client:
registerWithEureka: true
fetchRegistry: true
serviceUrl:
defaultZone: http://127.0.0.1:9002/eureka/
instance:
hostname: localhost

also, make sure your eureka server started.

for more details, I have created series, you can go through it.
http://sachin4java.blogspot.in/p/microservices.html

[rahula072]

@ranesaci

i have tried that but getting the same error and i have not written any client yet. This error i am getting while starting eureka server.

[ranesaci]

@rahula072
for eureka server, make your application.properties as shown below:

server.port=9002
spring.application.name=eureka-service

Eureka server

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

logging.level.com.netflix.eureka=OFF
logging.level.com.netflix.discovery=OFF

[rahula072]

@ranesaci

Thanks you so much for your help. Now Eureka server is up and running ,thanks to u.

[orion-pax]

After a lot of googling and getting no joy I ended up just changing the eureka-service server.port value in the application.properties file or its equivalent in application.yml file and it fixed the issue.

[coolmagic]

Well such a simple thing, was getting same issue and it was this word in bold
eureka.client.service-url.defaultZone=http://localhost:9999/eureka/

[luanldt]

After days, looking thousand times on the same config file I realized the issue. At the end it was just a misspelling of defaultzone. After changing it to defaultZone everything works like expected.
Thank you very much for your time.

Thanks! you save my time 👍