Dropping a User Cascade from the EM Console Fails with ORA-7445 [_memcpy()+976]
(Doc ID 1121949.1)
Last updated on FEBRUARY 18, 2020
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.3 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
***Checked for relevance on 22-Feb-2013***
Dropping a user cascade from the Enterprise Manager console fails with the following error:
ORA-07445: exception encountered: core dump [_memcpy()+976] [SIGSEGV] [Address not mapped to object] [0x000000000]  
The call stack contains the following functions:
<- memcpy <- qmtCopySharedStr <- qmtLoadSharedData <- qmtbInit
<- qmtInit <- qm_init_sga_pass1 <- qm_init_uga_helper <- rpiswu2 <- qm_run_as_ksys
Once a drop user cascade fails, any attempts to run utlrp.sql after that will hang.
Although the drop user cascade fails, all of the user's objects are removed.
Attempting to drop a user without cascade just hangs.
The following error may also be encountered:
ORA-00600: internal error code, arguments: [qmtInit1], , , , , , , 
The LD_LIBRARY_PATH is set correctly on the database server:
ORACLE_HOME = /oracle/product/10.2.0
LD_LIBRARY_PATH = /oracle/product/10.2.0/lib
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