An example of the error reported after SHUTDOWN IMMEDIATE:

SQL*Plus: Release 10.2.0.3.0 - Production on Sob Jan 26 14:23:59 2008

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Connected.
Database closed.
Database dismounted.
ORA-00600: internal error code, arguments: [LibraryCacheNotEmptyOnClose], [], [], [], [], [], [], []
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options

According to Metalink note 4483084.8 “Bug 4483084 – OERI[LibraryCacheNotEmptyOnClose] on shutdown” this error message could be ignored. Bug is fixed in 11.1.0.6.

We’re getting this error sporadically after we migrated to 64-bit 10g R2, never received the error before (on 32-bit OS/RDBMS).