一套Linux x86-64上的11.2.0.2数据库在使用data pump数据泵expdp工具导出时遭遇了ORA-31623错误，详细日志如下: 
[oracle@rh2 dbs]$ expdp system/D2nb51tz dumpfile=s01:sh.dmp schemas=sh

Export: Release 11.2.0.2.0 - Production on Mon May 2 22:46:57 2011

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

UDE-31623: 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 3326
ORA-06512: at "SYS.DBMS_DATAPUMP", line 4551
ORA-06512: at line 1

/* 伴随以上ORA-31623错误在告警日志中出现了以下记录 */

2011-05-02 22:47:05.792000 +08:00
Errors in file /s01/orabase/diag/rdbms/prod/PROD1/trace/PROD1_ora_22060.trc  (incident=54525):
ORA-04031: unable to allocate 56 bytes of shared memory