Occurs on server startup. Deployed a vdb and was able to connect, etc. Bounced the server and now get a bunch of these errors:

21:03:39,432 ERROR [org.jboss.threads.executor] (teiid-async-threads -
1) Task execution failed for task org.teiid.jboss.VDBService$6@54241d18:
java.lang.NullPointerException
at
org.teiid.metadata.MetadataFactory.addDatatype(MetadataFactory.java:589)
[teiid-api-8.4.0.CR2-SNAPSHOT.jar:8.4.0.CR2-SNAPSHOT]
at
org.teiid.metadata.MetadataFactory.correctDataTypes(MetadataFactory.java:583)
[teiid-api-8.4.0.CR2-SNAPSHOT.jar:8.4.0.CR2-SNAPSHOT]
at
org.teiid.metadata.MetadataFactory.correctDatatypes(MetadataFactory.java:559)
[teiid-api-8.4.0.CR2-SNAPSHOT.jar:8.4.0.CR2-SNAPSHOT]
at org.teiid.jboss.VDBService$6.run(VDBService.java:367)
[teiid-jboss-integration-8.4.0.CR2-SNAPSHOT.jar:8.4.0.CR2-SNAPSHOT]
at
org.jboss.threads.SimpleDirectExecutor.execute(SimpleDirectExecutor.java:33)
at org.jboss.threads.QueueExecutor.runTask(QueueExecutor.java:806)
at org.jboss.threads.QueueExecutor.access$100(QueueExecutor.java:45)
at org.jboss.threads.QueueExecutor$Worker.run(QueueExecutor.java:847)
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_09-icedtea]
at org.jboss.threads.JBossThread.run(JBossThread.java:122)
------------

Looking at MetadataFactory I noticed the following:
Datatype dt = this.builtinDataTypes.get(c.getDatatype().getName());
if (dt != null)

{ c.setDatatype(dt); }

else

{ //must be an enterprise type //if it's used in a single schema, we're ok, but when used in multiple there's an issue --> addDatatype(dt); }

}

---------
that addDatatype(dt) was passing dt when null, and therefore, in addDatatype, the NPE was caused when datatype.getName() is called. But I think what was intended was to pass in c.getDatatype() when it wasn't found in the builtinDataTypes.