ORA-600(kcblasm_1)和ORA-7445(kxhfNewBuffer)錯誤
之所以將兩個錯誤合在一起發出，主要是因為造成這兩個錯誤的SQL是同一個。
第一次出現錯誤的時候報錯ORA-600(kcblasm_1)，第二次出現改成了ORA-7445錯誤，錯誤的第一個引數為kxhfNewBuffer。
Mon Aug 10 15:47:36 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20414.trc:
ORA-00600: internal error code, arguments: [kcblasm_1], [102], [], [], [], [], [], []
Mon Aug 10 15:47:37 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20414.trc:
ORA-07445: exception encountered: core dump [0000000101D51BB4] [SIGSEGV] [Address not mapped to object] [0x3032313300043148] [] []
ORA-00600: internal error code, arguments: [kcblasm_1], [102], [], [], [], [], [], []
Mon Aug 10 15:47:38 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20414.trc:
ORA-07445: exception encountered: core dump [0000000101D51BB4] [SIGSEGV] [Address not mapped to object] [0x3032313300043148] [] []
ORA-07445: exception encountered: core dump [0000000101D51BB4] [SIGSEGV] [Address not mapped to object] [0x3032313300043148] [] []
ORA-00600: internal error code, arguments: [kcblasm_1], [102], [], [], [], [], [], []
Mon Aug 10 15:47:40 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20414.trc:
ORA-07445: exception encountered: core dump [0000000101D51BB4] [SIGSEGV] [Address not mapped to object] [0x3032313300043148] [] []
ORA-07445: exception encountered: core dump [0000000101D51BB4] [SIGSEGV] [Address not mapped to object] [0x3032313300043148] [] []
ORA-07445: exception encountered: core dump [0000000101D51BB4] [SIGSEGV] [Address not mapped to object] [0x3032313300043148] [] []
ORA-00600: internal error code, arguments: [kcblasm_1], [102], [], [], [], [], [], []
Mon Aug 10 16:19:28 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
Mon Aug 10 16:19:28 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
Mon Aug 10 16:19:29 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
Mon Aug 10 16:19:31 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
Mon Aug 10 16:19:32 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
Mon Aug 10 16:19:34 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
Mon Aug 10 16:19:36 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
Mon Aug 10 16:19:39 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
Mon Aug 10 16:19:41 2009
Errors in file /data/oracle/ora92/admin/data01/udump/data01_ora_20756.trc:
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kghasp1], [0xFFFFFFFF799800E8], [], [], [], [], [], []
ORA-07445: exception encountered: core dump [0000000101919BD0] [SIGSEGV] [Address not mapped to object] [0x000000210] [] []
兩個錯誤的間隔時間很短，而且都是同一個SQL語句所引起。
由於以前並沒有出現過這個錯誤，而最近程式又修改了SQL語句，基本上可以確定問題就是SQL語句導致的。
由於SQL語句比較長，而且和業務有關，這裡就不貼出來了。檢查SQL語句，發現可能導致問題的部分是SQL的WHERE條件中，包含了下列的寫法：
and (b.ready_flag is null
or b.ready_flag in
(
select r.ready_type from cat_zone_product_ready r
where r.plat_id ='FR20T0000020000000000061'
and r.enable_flag='1'
)
)
這種用OR關聯起來的子查詢，本身就容易引發錯誤。
由於cat_zone_product_ready表中plat_id和ready_type是唯一的，因此將上面的查詢改成了外連線的方式。
將SQL簡化後一點，來說明問題，原始的寫法為：
SQL> select count(*)
2 from (
3 select a.id, a.trade_name, a.remark
4 from cat_product a, cat_drug b
5 where a.medical_id = b.id
6 and a.enable_flag = '1'
7 and (b.ready_flag is null
8 or b.ready_flag=''
9 or b.ready_flag in
10 (
11 select r.ready_type from cat_zone_product_ready r
12 where r.plat_id ='FR20T0000020000000000061'
13 and r.enable_flag='1'
14 )
15 )
16 );
COUNT(*)
----------
105476
修改為：
SQL> select count(*)
2 from (
3 select a.id, a.trade_name, a.remark
4 from cat_product a, cat_drug b, cat_zone_product_ready r
5 where a.medical_id = b.id
6 and a.enable_flag = '1'
7 and b.ready_flag = r.ready_type (+)
8 and r.plat_id (+)='FR20T0000020000000000061'
9 and r.enable_flag (+) ='1'
10 and ((r.id is not null) or (r.id is null and b.ready_flag is null))
11 );
COUNT(*)
----------
105476
根據上面的方法修改了程式中的SQL語句，觀察了半個月左右，這個錯誤沒有再次出現，看來透過修改SQL的方式避開了這個錯誤。
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/4227/viewspace-613523/，如需轉載，請註明出處，否則將追究法律責任。
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