RAC: Library Cache locks and Pins

Scripts presented here and here are not very helpful for RAC environments, because x$ tables are local to instances and if the blocker is in a different instance than the blocked, you will get no results.

SELECT INST_ID,
       HANDLE,
       GRANT_LEVEL,
       REQUEST_LEVEL,
       RESOURCE_NAME1,
       RESOURCE_NAME2,
       PID,
       TRANSACTION_ID0,
       TRANSACTION_ID1,
       OWNER_NODE,
       BLOCKED,
       BLOCKER,
       STATE
  FROM GV$GES_BLOCKING_ENQUEUE;

Querying GV$GES_BLOCKING_ENQUEUE you will see in RESOURCE_NAME1 column, in a library cache lock entries like "[0x1b370d][0x81b0000],[LA]" and in library cache pins "[0x1b370d][0x81b0000],[NA]".
The range for library cache locks is LA to LZ and for library cache pins NA to NZ.

The blocker is the session with value "1" in the BLOCKER column.