一台ORACLE实例(Oracle Database 10g Release 10.2.0.5.0)启动时,报“Error 942 occured during Initialization of Bufq KUPC$S_1_20181023155636”错误，具体情况如下所示，内容信息来自告警日志
SMON: enabling cache recovery
Thu Aug 08 18:57:04 CST 2019
Successfully onlined Undo Tablespace 1.
Thu Aug 08 18:57:04 CST 2019
SMON: enabling tx recovery
Thu Aug 08 18:57:04 CST 2019
Database Characterset is UTF8
replication_dependency_tracking turned off (no async multimaster replication found)
Error 942 occured during Initialization of Bufq KUPC$S_1_20181023155636
Starting background process QMNC
QMNC started with pid=80, OS id=1777
Thu Aug 08 18:57:06 CST 2019
Completed: ALTER DATABASE OPEN
Thu Aug 08 18:57:06 CST 2019
db_recovery_file_dest_size of 81920 MB is 0.00% used. This is a
user-specified limit on the amount of space that will be used by this
database for recovery-related files, and does not reflect the amount of
space available in the underlying filesystem or ASM diskgroup.
Thu Aug 08 19:00:57 CST 2019
Thread 1 advanced to log sequence 279278 (LGWR switch)
$ expdp system/xxx DIRECTORY=DUMP_DIR LOGFILE=expdp.log DUMPFILE=test.dmp TABLES=xxxx.xxxx
Export: Release 10.2.0.5.0 - 64bit Production on Friday, 09 August, 2019 17:08:13
Copyright (c) 2003, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 10g Release 10.2.0.5.0 - 64bit Production
UDE-00008: operation generated ORACLE error 31623
ORA-31623: a job is not attached to this session via the specified handle
ORA-06512: at "SYS.DBMS_DATAPUMP", line 2772
ORA-06512: at "SYS.DBMS_DATAPUMP", line 3886
ORA-06512: at line 1
如果加上参数TRACE=480300， expdp会一直卡死，不出结果。告警日志也没有ORA-600错误，跟官方文档“Errors ORA-31623 And ORA-600 [kwqbgqc: bad state] During DataPump Export Or Import (文档 ID 754401.1)”描述的略有出入。
$ expdp system/xxx DIRECTORY=DUMP_DIR LOGFILE=expdp.log DUMPFILE=test.dmp TABLES=xxxx.xxxx TRACE=480300
解决方法：
1：关闭数据库实例，然后以约束方式启动（startup restrict)
SQL> connect / as sysdba
SQL> shutdown immediate
SQL> startup restrict
2: 删除queue表
SQL> exec dbms_aqadm.drop_queue_table (queue_table => 'SYS.KUPC$DATAPUMP_QUETAB', force => TRUE);
PL/SQL procedure successfully completed.
官方文档提示，如果遇到ORA错误，可以按下面方式处理，如果没有遇到任何错误，直接跳过下面内容。
- If the ORA-4020 error is reported, then wait some minutes and try again
- If an ORA-24* error is reported, then it could be necessary to perform a manual cleanup. To perform this, contact with a Support Engineer.
3：执行下面脚本，重建queue。此脚本位于$ORACLE_HOME/rdbms/admin目录下的catdpb.sql脚本中
SQL>
SQL> BEGIN
2 dbms_aqadm.create_queue_table(queue_table => 'SYS.KUPC$DATAPUMP_QUETAB', multiple_consumers => TRUE, queue_payload_type =>'SYS.KUPC$_MESSAGE', comment => 'DataPump Queue Table', compatible=>'8.1.3');
3
4 EXCEPTION
WHEN OTHERS THEN
5 6 IF SQLCODE = -24001 THEN NULL;
7 ELSE RAISE;
8 END IF;
9 END;
10 /
PL/SQL procedure successfully completed.
4：重启数据库实例
SQL> shutdown immediate;
SQL> startup
5：重编译失效对象
SQL> @$ORACLE_HOME/rdbms/admin/utlrp.sql
6：测试验证数据导出功能
“Errors ORA-31623 And ORA-600 [kwqbgqc: bad state] During DataPump Export Or Import (文档 ID 754401.1)”原文如下：
APPLIES TO:
Oracle Server - Enterprise Edition - Version: 10.2.0.4 and later [Release: 10.2 and later ]
Information in this document applies to any platform.
Next ORA-942 is reported in the alert log at database startup:
Starting ORACLE instance (normal)
...
Opening with internal Resource Manager plan
where NUMA PG = 4, CPUs = 2
replication_dependency_tracking turned off (no async multimaster replication found)
Error 942 occured during Initialization of Bufq KUPC$S_2_20081126123353
Starting background process QMNC
QMNC started with pid=19, OS id=1567
Fri Nov 25 07:33:56 2011
Completed: ALTER DATABASE OPEN
...
Trying to do an export, it fails with:
oracle:~ > expdp system/xxx STATUS=60 PARALLEL=4 DIRECTORY=data_pump_dir LOGFILE=expdp.log DUMPFILE=expdp_%u.dmp TABLES=user.table_name TRACE=480300
Export: Release 10.2.0.4.0 - 64bit Production on Monday, 28 November, 2011 13:06:37
Copyright (c) 2003, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
UDE-00008: operation generated ORACLE error 31623
ORA-31623: a job is not attached to this session via the specified handle
ORA-06512: at "SYS.DBMS_DATAPUMP", line 2772
ORA-06512: at "SYS.DBMS_DATAPUMP", line 3886
ORA-06512: at line 1
At the same time an ORA-600 error is reported an the alert log:
Mon Nov 28 13:06:39 2011
Errors in file /production/ora1/DUPDWH/var/DUPDWH/admin/udump/dupdwh_ora_16238.trc:
ORA-00600: internal error code, arguments: [kwqbgqc: bad state], [1], [1], [], [], [], [], []
A datapump queue is invalid or it doesn't exist.?
The problem occurs during the buffered queue initialization.
To recreate the failing queue, follow the steps from?
Note 754401.1 - ORA-31623 and ORA-600 [kwqbgqc: bad state] During an Export or Import with DataPump
NOTE:403036.1 - ORA-00600: [Kwqbgqc: Bad State], [1], [1] reported on Enqueue of BUFFERED message to a single or multiple consumer queue
NOTE:754401.1 - ORA-31623 and ORA-600 [kwqbgqc: bad state] During an Export or Import with DataPump
参考资料：
Errors ORA-31623 And ORA-600 [kwqbgqc: bad state] During DataPump Export Or Import (文档 ID 754401.1)
Error 942 Occured During Initialization Of Bufq KUPC$S_<number>' Starting Database (文档 ID 1384131.1)