a lot invalid objects in sys schema

Hi, Folks,
[Quoted] After upgade our database from 8.1.6 to 8.1.7, I found that a lot of objects in SYS are INVALID.(total 253).
I recompiled some package and view, but all the Java Class and
package body are still invalid. Any
suggestions?

DBMS_REPCAT_UNTRUSTED          PACKAGE BODY       INVALID
DBMS_REPCAT_SNA_UTL            PACKAGE BODY       INVALID
DBMS_REPCAT_SNA                PACKAGE BODY       INVALID
DBMS_REPCAT_RPC_UTL            PACKAGE BODY       INVALID
DBMS_REPCAT_RPC                PACKAGE BODY       INVALID
DBMS_REPCAT_RGT_UTL            PACKAGE BODY       INVALID
DBMS_REPCAT_RGT_CUST2          PACKAGE BODY       INVALID
DBMS_REPCAT_RGT_ALT            PACKAGE BODY       INVALID

OBJECT_NAME                    OBJECT_TYPE        STATUS
------------------------------ ------------------ -------
DBMS_IAS_SESSION               PACKAGE BODY       INVALID
DBMS_IAS_QUERY                 PACKAGE BODY       INVALID
DBMS_IAS_CONFIGURE             PACKAGE BODY       INVALID
DBMS_DEFER_SYS_PART1           PACKAGE BODY       INVALID
DBMS_DEFER_REPCAT              PACKAGE BODY       INVALID
DBMS_DEFER_QUERY               PACKAGE BODY       INVALID
DBMS_DEFER_INTERNAL_SYS        PACKAGE BODY       INVALID
DBMS_DEFER_INTERNAL_QUERY      PACKAGE BODY       INVALID
DBMS_DEFERGEN_PRIORITY         PACKAGE BODY       INVALID
DBMS_DEFERGEN_INTERNAL         PACKAGE BODY       INVALID
DBMS_DEFERGEN                  PACKAGE BODY       INVALID

[Quoted] Thanks for your help.  

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