Trouble injecting resources with Java EE 6 and Glassfish 3.1 using @Resource

I'm having trouble trying to use the @Resource annotation with Java EE 6 and Glassfish 3.1 (embedded). I want to look up a JNDI datasource, so I'm trying to get it working with th开发者_C百科e default datasource in Glassfish. In my code I have:

@Resource(lookup = "java:global/env/jdbc/__default")
DataSource dataSource;

It compiles fine. I'm using Maven + the advice here.

However, when I deploy my .war I always get the following error:

WARNING: Incorrect @Resource annotation class definition - missing lookup attribute
  symbol: FIELD
  location: javax.sql.DataSource ResourceLookup.dataSource

It's such a simple example that I'd be extremely surprised if it were a bug. I must be doing something wrong. Any ideas?

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As a test, can you try "jdbc/__default" as the lookup string? For my datasources I look them up using a jndi name I have specified, always with the pattern "jdbc/MyDataSourceName".

@Resource(lookup="jdbc/MyDataSourceName") works well. Never tried to look up the default ds, particularly not through the java:global namespace.