EclipseLink 2.7.0 and JPA API 2.2.0 - signature mismatch

Question

When running a project built by maven with the following dependencies:

        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>javax.persistence</artifactId>
            <version>2.2.0</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>eclipselink</artifactId>
            <version>2.7.0</version>
        </dependency>

I get the following error at runtime:

java.lang.SecurityException: class "javax.persistence.Cacheable"'s signer information does not match signer information of other classes in the same package

The javax.persistence-2.2.0 artifact is signed and contains the javax.persistence.Cacheable.class annotation, while the eclipselink-2.7.0 artifact is not signed and also contains the same java class annotation.

How can this be fixed?

Edit

Replacing the javax.persistence artifact version 2.2.0 by the version 2.1.1 fixes the problem (this one is not signed), but I'm not sure it's a normal situation.

Answer 1

Thanks Stéphane - the edit at the end of your question helped me "fix" the same problem. For anyone else who hits this as well - here is an expanded answer. This is what you need to "fix" things in your pom (until Eclipse fix things properly):

<!-- See https://stackoverflow.com/q/45870753 -->
<dependency>   
    <groupId>org.eclipse.persistence</groupId>
    <artifactId>eclipselink</artifactId>
    <version>2.7.0</version>
    <exclusions>
        <exclusion>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>javax.persistence</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.eclipse.persistence</groupId>
    <artifactId>javax.persistence</artifactId>
    <version>2.1.1</version>
</dependency>

This pulls in eclipselink but excludes the javax.persistence dependency that it tries to pull in and replaces it with an earlier version of javax.persistence that doesn't have the signing issue.

Aside: javax.persistence version 2.2.0 is explicitly pulled in, in the pom fragment shown in the original question, despite already being a transitive dependency of eclipselink.

Explanation

Summary - the eclipselink artifact depends on javax.persistence and both contain classes that are in the package javax.persistence. However the javax.persistence jar is signed while the eclipselink one is not. So the Java runtime will complain, when loading a class from the package javax.persistence in the eclipselink jar, that it's lack of signing doesn't match with classes already loaded from the same package in the javax.persistence jar.

Details - if I put a breakpoint in java.util.concurrent.ConcurrentHashMap.putIfAbsent(K, V) with condition "javax.persistence".equals(arg0) then I see that javax.persistence is mapped to the following CodeSource value:

(file:/Users/georgehawkins/.m2/repository/org/eclipse/persistence/javax.persistence/2.2.0/javax.persistence-2.2.0.jar [
[
  Version: V3
  Subject: CN="Eclipse Foundation, Inc.", OU=IT, O="Eclipse Foundation, Inc.", L=Ottawa, ST=Ontario, C=CA
  Signature Algorithm: SHA256withRSA, OID = 1.2.840.113549.1.1.11
  ...

I.e. javax.persistence-2.2.0.jar is signed by the Eclipse Foundation and contains classes in the package javax.persistence. This jar is pulled in when some part of my application (actually something deep in Spring logic) tries to load javax.persistence.EntityManagerFactory.

If I then put a breakpoint in java.lang.ClassLoader.checkCerts(String, CodeSource) on the throw new SecurityException line I then see that it hits this line when the passed in CodeSource is:

(file:/Users/georgehawkins/.m2/repository/org/eclipse/persistence/eclipselink/2.7.0/eclipselink-2.7.0.jar <no signer certificates>)

I.e. eclipselink-2.7.0.jar also contain classes that are in the javax.persistence package but it is unsigned so a clash occurs that results in a SecurityException being thrown. This happens when something (also deep in Spring logic) tries to load javax.persistence.PersistenceUtil.

If I look at the output of mvn dependency:tree I see that this mismatch seems to be down to eclipselink itself - it is pulling in org.eclipse.persistence:javax.persistence:jar:2.2.0 itself. I.e. it isn't some clash with some other dependency:

[INFO] |  \- org.eclipse.persistence:eclipselink:jar:2.7.0:compile
[INFO] |     +- org.eclipse.persistence:javax.persistence:jar:2.2.0:compile
[INFO] |     +- org.eclipse.persistence:commonj.sdo:jar:2.1.1:compile
[INFO] |     +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] |     \- org.glassfish:javax.json:jar:1.0.4:compile

I've logged this now at bugs.eclipse.org - see bug 525457.