spring boot fails to run - IllegalAccessError on startup - spring

Question

I have a strange issue and that I have not been able to resolve. I am trying to use the sample JPA sprint boot (v0.5.0-M6) project as a starting point for an application I am writing. I grabbed the JPA sample and got that to run locally. I then proceeded to add my code into that project. I imported into eclipse and run as spring-boot. Then I get this error:
Exception in thread "main" java.lang.IllegalAccessError: tried to access class org.springframework.core.io.DefaultResourceLoader$ClassPathContextResource from class org.springframework.boot.context.embedded.EmbeddedWebApplicationContext
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getResourceByPath(EmbeddedWebApplicationContext.java:386)
at org.springframework.core.io.DefaultResourceLoader.getResource(DefaultResourceLoader.java:100)
at org.springframework.context.support.GenericApplicationContext.getResource(GenericApplicationContext.java:211)
at org.springframework.boot.context.initializer.ConfigFileApplicationContextInitializer.load(ConfigFileApplicationContextInitializer.java:192)
at org.springframework.boot.context.initializer.ConfigFileApplicationContextInitializer.load(ConfigFileApplicationContextInitializer.java:134)
at org.springframework.boot.context.initializer.ConfigFileApplicationContextInitializer.initialize(ConfigFileApplicationContextInitializer.java:121)
at org.springframework.boot.SpringApplication.applyInitializers(SpringApplication.java:403)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:287)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:749)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:738)
From what I can tell, this is the wrong application context, since I am not using XML configuration but annotations to drive the configuration. Spring boot is automatically selecting this one and I need to tell it not to use the above. At least that is what I think I need to do.
I did search here and in the spring.io forums but no one seems to have the same issue.
Question: What drives the selection of an application context with the auto configuration?
What should I be looking at to resolve the above issue? What else do I need to provide to here help debug the auto configuration issue?
TIA,
Scott

Answer 1

I got the same problem.
if you use maven check your pom.xml
remove conflict version in Spring Lib.
<properties>
<hibernate.version>4.2.0.Final</hibernate.version>
<mysql.connector.version>5.1.21</mysql.connector.version>
<spring.version>3.2.2.RELEASE</spring.version>
</properties>
i remove this line
<spring.version>3.2.2.RELEASE</spring.version>
and in maven dependency just
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
Hope this help.

Answer 2

I was facing the same problem, and solved fixing the referencing to the boot-starter-parent pom.
At the pom.xml file I used:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>0.5.0.M6</version>
</parent>
I have some urgent issues to fix now, so I didn't inspected this parent pom to see what's so important here, but I hope this can help you - don't forget to verify the version you're using!