Spring cloud dataflow DestinationReslutionException when running sample source - spring

Question

I have problem with running sample spring-cloud-dataflow source app. Application exits with code 0 (and it should be working). I debugged it and noticed following exception being thrown:
DestinationResolutionException: failed to look up MessageChannel with name 'output'
I was follownig the getting started guide http://docs.spring.io/spring-cloud-stream/docs/current/reference/htmlsingle/index.html#_getting_started and I can't get it worked.
What I have done:
- I have zookeeper working;
- I have kafka working;
The code:
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.messaging.Source;
import org.springframework.integration.annotation.InboundChannelAdapter;
#EnableBinding(Source.class)
public class SampleSource {
#InboundChannelAdapter(Source.OUTPUT)
public String greet() {
return "hello world " + System.currentTimeMillis();
}
}
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
#SpringBootApplication
public class SampleSourceApplication {
public static void main(String[] args) {
try (ConfigurableApplicationContext run = SpringApplication.run(SampleSourceApplication.class, args)) {
}
}
}
And pom:
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
<scope>import</scope>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Camden.SR3</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-stream-kafka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
Commandline arguments: --spring.cloud.stream.bindings.output.destination=test
I can give more details about the Exception:
org.springframework.messaging.core.DestinationResolutionException: failed to look up MessageChannel with name 'output' in the BeanFactory.;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cloud.stream.messaging.Source': Initialization of bean failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cloud.stream.config.ChannelBindingServiceConfiguration': Initialization of bean failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'spring.jackson-org.springframework.boot.autoconfigure.jackson.JacksonProperties': Initialization of bean failed;
nested exception is java.lang.IllegalStateException: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#2ef14fe has been closed already

Answer 1

It looks like the class SampleSource isn't imported by the main application.
Are you sure the SampleSource class is in the same package as that of SampleSourceApplication?