Module linkage error

[FroMage]

In ceylon.transaction:

module ceylon.transaction "1.1.1" {
// if I comment this out, I get an error
    //shared import javax.transaction.api "1.2";
    shared import org.jboss.narayana.jta "5.1.1.Final";
}

And its test:

module test.ceylon.transaction "1.1.1" {
    import ceylon.transaction "1.1.1";
}

The definition of org.jboss.narayana.jta:

<module xmlns="urn:jboss:module:1.1" name="org.jboss.jboss-transaction-spi" slot="7.1.1.Final">
  <resources>
    <resource-root path="jboss-transaction-spi-7.1.1.Final.jar"/>
  </resources>
  <dependencies>
    <module name="javax.transaction.api" export="false" slot="1.2"/>
    <module name="org.jboss.logging" export="true" slot="3.1.4.GA"/>
  </dependencies>
</module>

And javax.transaction.api:

<module xmlns="urn:jboss:module:1.1" name="javax.transaction.api" slot="1.2">
    <resources>
        <resource-root path="javax.transaction.api-1.2.jar"/>
    </resources>
</module>

The error I get are:

Debug: Finding class javax.transaction.xa.XAResource from Module "test.ceylon.transaction:1.1.1" from Ceylon ModuleLoader: RootRepositoryManager: FileContentStore: /home/stephane/.ceylon/cache
Debug: Finding local class javax.transaction.xa.XAResource from Module "javax.transaction.api:1.2" from Ceylon ModuleLoader: RootRepositoryManager: FileContentStore: /home/stephane/.ceylon/cache
Debug: Loading class javax.transaction.xa.XAResource locally from Module "javax.transaction.api:1.2" from Ceylon ModuleLoader: RootRepositoryManager: FileContentStore: /home/stephane/.ceylon/cache


Debug: Finding class javax.transaction.xa.XAResource from Module "org.jboss.narayana.jta:5.1.1.Final" from Ceylon ModuleLoader: RootRepositoryManager: FileContentStore: /home/stephane/.ceylon/cache
Warning: Failed to define class com.arjuna.ats.jta.resources.LastResourceCommitOptimisation in Module "org.jboss.narayana.jta:5.1.1.Final" from Ceylon ModuleLoader: RootRepositoryManager: FileContentStore: /home/stephane/.ceylon/cache java.lang.LinkageError: loader constraint violation: loader (instance of ceylon/modules/jboss/runtime/CeylonModuleClassLoader) previously initiated loading for a different type with name "javax/transaction/xa/XAResource"
Debug: Unexpected error in module loader java.lang.LinkageError: loader constraint violation: loader (instance of ceylon/modules/jboss/runtime/CeylonModuleClassLoader) previously initiated loading for a different type with name "javax/transaction/xa/XAResource"

[FroMage]

I guess I'll need some help from @dmlloyd

[FroMage]

Even an upgrade to the latest 1.4.4.Final does not fix this.

[alesj]

@FroMage imo, you get that same class XAResource from a module and also from JDK. /Cc @dmlloyd

[FroMage]

From what I can see in the debugger, the first time it's loaded by the ModuleClassLoader for javax.transaction.api:1.2, which sounds right. The second time it's loaded as a by-product of defining a class (com.arjuna.ats.jta.resources.LastResourceCommitOptimisation) from org.jboss.jboss-transaction-spi where it fails, but no clue why, my debugger just jumps around randomly.

[FroMage]

@alesj that class is not in the JDK, although its package is.

[FroMage]

AHA, we're getting somewhere. I told the CeylonModuleLoader (@alesj's creation) that the JDK did not have a javax.transaction module with a javax.transaction.xa package (nobody depended on it explicitly), and it fails to link h2 (another module), which does not have a module descriptor and depended on it implicitly (like everyone depends on the JDK). So I assume that for some reason it used to get that dependency (on the jar) via the JDK auto-import (which is surely wrong).

[FroMage]

ARG DAMNIT you're right the JDK does have some stuff in javax.transaction.xa. And yes that includes XAResource:

      491  2015-01-27 00:43   javax/transaction/InvalidTransactionException.class
      494  2015-01-27 00:43   javax/transaction/TransactionRequiredException.class
      500  2015-01-27 00:43   javax/transaction/TransactionRolledbackException.class
     1449  2015-01-27 00:42   javax/transaction/xa/XAException.class
     1062  2015-01-27 00:42   javax/transaction/xa/XAResource.class
      292  2015-01-27 00:42   javax/transaction/xa/Xid.class

But my jars need more than this. So how do I resolve this shit?

[FroMage]

The javax.transaction.api module contains:

      541  2013-10-08 15:44   javax/transaction/Status.class
      483  2013-10-08 15:44   javax/transaction/HeuristicRollbackException.class
      491  2013-10-08 15:44   javax/transaction/InvalidTransactionException.class
      499  2013-10-08 15:44   javax/transaction/TransactionScoped.class
      863  2013-10-08 15:44   javax/transaction/Transactional.class
      292  2013-10-08 15:44   javax/transaction/xa/Xid.class
     1468  2013-10-08 15:44   javax/transaction/xa/XAException.class
     1062  2013-10-08 15:44   javax/transaction/xa/XAResource.class
      195  2013-10-08 15:44   javax/transaction/Synchronization.class
      661  2013-10-08 15:44   javax/transaction/UserTransaction.class
      474  2013-10-08 15:44   javax/transaction/HeuristicMixedException.class
      631  2013-10-08 15:44   javax/transaction/TransactionSynchronizationRegistry.class
      477  2013-10-08 15:44   javax/transaction/HeuristicCommitException.class
      771  2013-10-08 15:44   javax/transaction/Transaction.class
      456  2013-10-08 15:44   javax/transaction/RollbackException.class
      494  2013-10-08 15:44   javax/transaction/TransactionRequiredException.class
      500  2013-10-08 15:44   javax/transaction/TransactionRolledbackException.class
      885  2013-10-08 15:44   javax/transaction/TransactionManager.class
     1366  2013-10-08 15:44   javax/transaction/Transactional$TxType.class
      585  2013-10-08 15:44   javax/transaction/SystemException.class
      463  2013-10-08 15:44   javax/transaction/TransactionalException.class
      468  2013-10-08 15:44   javax/transaction/NotSupportedException.class

[FroMage]

So it's a superset of the JDK's javax.transaction I suppose.

[alesj]

Yup, that javax.transactions is some funky shit ...

[FroMage]

So what am I supposed to do? Exclude some classes from javax.transaction.api so that the JDK parts get picked up? Are they even the same classes?

[FroMage]

Apparently excluding it is not enough since it excludes it from export, but it's still in the module itself.