Spring-boot-admin: Spring boot admin No applications registered.

[eduardocintra]

I'm trying use Spring Boot Admin Server but in the dashboard my application is not listed there.

What did I do, in my pom.xml I added the following dependencies:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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>

    <groupId>br.com.teste.sbadm</groupId>
    <artifactId>sbadm</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>


    <name>sbadm</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.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>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>


        <!-- https://mvnrepository.com/artifact/de.codecentric/spring-boot-admin-server -->
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-server</artifactId>
            <version>2.0.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/de.codecentric/spring-boot-admin-server-ui -->
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-server-ui</artifactId>
            <version>2.0.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/de.codecentric/spring-boot-admin-starter-client -->
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
            <version>2.0.2</version>
        </dependency>
    </dependencies>

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


</project>

In my SbadmApplication Class:

package br.com.teste.sbadm.sbadm;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import de.codecentric.boot.admin.server.config.EnableAdminServer;

@EnableAdminServer
@SpringBootApplication
public class SbadmApplication {

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

And in my application.properties:

spring.boot.admin.url=http://localhost:8084
management.security.enabled=false

But when I open the Spring Boot Admin dashboard I do not have any application.

After some minutes with the Application runs I get a Exception:

java.io.IOException: Uma conexão estabelecida foi anulada pelo software no computador host at java.base/sun.nio.ch.SocketDispatcher.write0(Native Method) ~[na:na] at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:51) ~[na:na] at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:115) ~[na:na] at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:80) ~[na:na] at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:50) ~[na:na] at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:473) ~[na:na] at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:134) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:101) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:157) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1279) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:670) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.util.net.SocketWrapperBase.flushBlocking(SocketWrapperBase.java:607) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.util.net.SocketWrapperBase.flush(SocketWrapperBase.java:597) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.coyote.http11.Http11OutputBuffer$SocketOutputBuffer.flush(Http11OutputBuffer.java:646) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.coyote.http11.filters.ChunkedOutputFilter.flush(ChunkedOutputFilter.java:169) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.coyote.http11.Http11OutputBuffer.flush(Http11OutputBuffer.java:252) ~[tomcat-embed-core-8.5.32.jar:8.5.32]

I already disabled my firewall without success...

Know I saw a waring in the console:

2018-09-05 15:06:17.340  WARN 51384 --- [gistrationTask1] d.c.b.a.c.r.ApplicationRegistrator
: Failed to register application as Application(name=spring-boot-application, management
Url=http://DESKTOP-B0J6ND5.xxx.local:8080/actuator, healthUrl=http://DESKTOP-B0J6ND5.xxx.local:8080/actuator/health, 
serviceUrl=http://DESKTOP-B0J6ND5.xxx.local:8080/) at
 spring-boot-admin ([http://localhost:8093/instances]): I/O error on POST 
request for "http://localhost:8093/instances": Connection refused: connect; nested exception is 
java.net.ConnectException: Connection refused: connect. Further attempts are logged on DEBUG level

[joshiste]

Either the url you specified for spring.boot.admin.client.url is just wrong or you have some kind of networking issue (may be a firewall blocking the traffic)

[eduardocintra]

The url is my application URL right? As I said, I disable my firewall. I don't understand why.

[eduardocintra]

I discovered the problem, the problem was the URL I was used:

spring.boot.admin.url

Instead of:

spring.boot.admin.client.url

Thank you for your help!

[anandvarkeyphilips]

Hi @joshiste , as I have previously mentioned, there are many unnecessary issues raised in SO in bulk and github tickets which could be solved just by giving a simple example link in the doc.. I think we should re consider this PR :https://github.com/codecentric/spring-boot-admin/pull/911
I have added everything for a beginner for both client and server apps with and without security..

[eduardocintra]

@anandvarkeyphilips

Sorry about this, really was a mistake my, but the problem was that I was following this guide to implements SBA https://www.baeldung.com/spring-boot-admin and in the guide they use the version 1.5 that the property to enable the SBA Client was different.