Q:

Is there a compatibility matrix of Spring-boot and Spring-cloud?

I am wondering if a compatibility matrix exists between Springboot and Springcloud?
I created a simple project on STS and am running into compatibility issues. 
   <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Camden.SR5</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

Having a good view of the supported versions of both Springboot and Springcloud will make things simpler.
I did observe an open issue that talks about this need - https://github.com/spring-cloud/spring-cloud-build/issues/43
Does the community have an approach on how they choose to get started on a specific version combination when they embark on a SpringCloud project?
Edit: Adding another instance of such a problem that I encountered since yesterday
snippets from pom.xml
<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
         <version>1.5.2.RELEASE</version>
        <!--<version>1.5.2.RELEASE</version> -->
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <!-- <version>Camden.SR6</version -->
                <!-- <version>Brixton.SR5</version> -->
                <!--  <version>Camden.SR6</version> -->
                <version>Camden.SR5</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

There are no maven errors in using 1.5.2.RELEASE with Camden.SR5 however when the app starts it throws the NoClassDefFoundError.
2017-03-28 09:51:15.148 ERROR 15808 --- [           main] o.s.boot.SpringApplication               : Application startup failed

java.lang.NoClassDefFoundError: org/springframework/cloud/context/named/NamedContextFactory$Specification
    at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_112]
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[na:1.8.0_112]
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_112]
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) ~[na:1.8.0_112]
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[na:1.8.0_112]
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368) ~[na:1.8.0_112]
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362) ~[na:1.8.0_112]
    at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_112]
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361) ~[na:1.8.0_112]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_112]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_112]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_112]
    at org.springframework.cloud.netflix.feign.FeignClientsRegistrar.registerClientConfiguration(FeignClientsRegistrar.java:367) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE]
    at org.springframework.cloud.netflix.feign.FeignClientsRegistrar.registerDefaultConfiguration(FeignClientsRegistrar.java:104) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE]
    at org.springframework.cloud.netflix.feign.FeignClientsRegistrar.registerBeanDefinitions(FeignClientsRegistrar.java:87) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:352) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:143) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:116) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:320) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:228) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:270) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:686) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:524) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at com.forecastessentials.school.SchoolUniformForecastApplication.main(SchoolUniformForecastApplication.java:12) [classes/:na]
Caused by: java.lang.ClassNotFoundException: org.springframework.cloud.context.named.NamedContextFactory$Specification
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_112]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_112]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_112]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_112]
    ... 31 common frames omitted

Using 1.4.5 with Brixton.SR6 is a combination that generally works well for me.

A:

Here is the release train Spring Boot compatibility table. Below the table, there is a note that the Camden release train builds on Spring Boot 1.4.x, but is also tested with 1.5.x.
You can also read the release notes for each release which notes compatible component versions:

Spring Cloud Camden builds on Spring Boot 1.4.x.

But later:

Adds Boot 1.5 compatibility and breaks Boot 1.3 compatibility

A:

Yes there is: http://start.spring.io/actuator/info
It includes more libraries than just spring-cloud, but not every single one of them.

A:

Source: https://spring.io/projects/spring-cloud
Spring Cloud release train Spring Boot compatibility
 ------------------------------ 
| Release Train | Boot Version |
| ------------- | ------------ |
| Hoxton        | 2.2.x        |
| Greenwich     | 2.1.x        |
| Finchley      | 2.0.x        |
| Edgware       | 1.5.x        |
| Dalston       | 1.5.x        |
| Camden        | 1.4.x        |
| Brixton       | 1.3.x, 1.4.x |
| Angel         | 1.2.x        |
 --------------- --------------

