ORA-07445 [Ddfnet7restore()+320 ] on Materialized View Refresh
(Doc ID 312107.1)
Last updated on MARCH 12, 2021
Applies to:Oracle Database - Enterprise Edition - Version 10.1.0.3 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
ORA-07445: exception encountered: core dump [ddfnet7Restore()+320] [SIGSEGV] [Address not mapped to object] [0x000000088]   when attempting to refresh snapshot.
The following conditions match :
1> Materialized view is created in 10.1.0.3
2> Master table is in a remote database (126.96.36.199)
3> Master table is accessed via a synonym. The synonym is created in the remote database and is in a schema different schema from the one containing the Master table
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