1) Gather statistics on the data dictionary and system tables.

EXEC DBMS_STATS.GATHER_DICTIONARY_STATS;
EXEC DBMS_STATS.GATHER_SYSTEM_STATS;
EXEC DBMS_STATS.GATHER_FIXED_OBJECTS_STATS (null);

2) Restart the EXPDP job 

expdp userid="'sys/*** as sysdba'" directory=dump content=METADATA_ONLY dumpfile=metadata%%U.dmp logfile=metadata.log schemas=dbuser exclude=index_statistics exclude=table_statistics version=11.2 parallel=4

SELECT owner_name, job_name, operation, job_mode, state FROM dba_datapump_jobs where state='EXECUTING';

OWNER_NAME	   JOB_NAME	       OPERATION	JOB_MODE	STATE
SYS	        SYS_EXPORT_SCHEMA_03	EXPORT	         SCHEMA	       EXECUTING

select sid,event,wait_class, state,username,status,lockwait,program,type,module,action,blocking_session_status,blocking_instance,
blocking_session, final_blocking_session_status,final_blocking_session
from gv$session 
where module like '%Data%Pump%';

SID EVENT	                                   WAIT_CLASS	STATE	USERNAME	STATUS	LOCKWAIT	PROGRAM	TYPE	MODULE	ACTION	BLOCKING_SESSION_STATUS	FINAL_BLOCKING_SESSION_STATUS
498 wait for unread message on broadcast channel	Idle	WAITING	SYS	        ACTIVE		   ORACLE.EXE (DM00)	USER	Data Pump Master	SYS_EXPORT_SCHEMA_03	NO HOLDER	NO HOLDER
730 wait for unread message on broadcast channel	Idle	WAITING	SYS	        ACTIVE		   expdp.exe	USER	expdp.exe		NO HOLDER	NO HOLDER
868 direct path read temp	                    User I/O	WAITING	SYS	        ACTIVE		   ORACLE.EXE (DW00)	BACKGROUND	Data Pump Worker	SYS_EXPORT_SCHEMA_03	UNKNOWN	UNKNOWN

SELECT session_id,status,timeout,name,error_number,sql_text FROM DBA_RESUMABLE;

SESSION_ID	STATUS	TIMEOUT	NAME	                  ERROR_NUMBER	SQL_TEXT
498	        NORMAL	7 200	SYS.SYS_EXPORT_SCHEMA_03	0	BEGIN :1 := sys.kupc$que_int.receive(:2); END;
868	        NORMAL	7 200	SYS.SYS_EXPORT_SCHEMA_03.1	0	SELECT /*+all_rows*/ VALUE(KU$), 0 ,KU$.BASE_OBJ.NAME ,KU$.BASE_OBJ.OWNER_NAME ,KU$.BASE_OBJ.TYPE_NAME ,KU$.GRANTEE ,KU$.GRANTOR ,KU$.PRIVNAME ,'OBJECT_GRANT' FROM SYS.KU$_10_1_OBJGRANT_VIEW KU$ WHERE NOT BITAND(KU$.WGO,12)!=0 AND  KU$.GRANTOR=KU$.BASE_OBJ.OWNER_NAME AND  NOT BITAND(KU$.BASE_OBJ.FLAGS,128)!=0 AND   KU$.OBJ_NUM IN (SELECT * FROM TABLE(DBMS_METADATA.FETCH_OBJNUMS(100001))) ORDER BY KU$.GRANTOR

SELECT process_order, processing_state, processing_status
FROM "SYSTEM"."SYS_EXPORT_SCHEMA_03"
WHERE  process_order > 0 AND duplicate = 0 AND object_type = :1
AND object_schema = :2 AND original_object_name = :3
AND partition_name IS NULL
AND subpartition_name IS NULL
AND :4 IS NULL AND :5 IS NULL

direct path read temp	                    User I/O	WAITING	SYS	        ACTIVE		   ORACLE.EXE (DW00)	BACKGROUND	Data Pump Worker

Processing object type SCHEMA_EXPORT/VIEW/GRANT/OWNER_GRANT/OBJECT_GRANT

EXCLUDE=OBJECT_GRANT