Database Terminated Unexpected Due To ORA-07445:[_kaio()+10] and ORA-07445:[_syscall6()+27] errors
(Doc ID 2064144.1)
Last updated on OCTOBER 09, 2019
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 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.
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Below errors seen in alert log file.
ORA-07445: exception encountered: core dump [_kaio()+10] [unknown signal] [ADDR:0x0] [PC:0xFFFF80FFBDBFA41A] [unknown code] 
ORA-07445: exception encountered: core dump [_syscall6()+27] [unknown signal] [ADDR:0x0] [PC:0xFFFF80FFBDBFB2CB] [unknown code] 
Subsequently instance terminated with below messages.
Termination issued to instance processes. Waiting for the processes to exit
Instance termination failed to kill one or more processes
Instance terminated by ARC1, pid = 29473
kaio <- skgfospo <- skgfrwat <- ksfdwtio <- ksfdwat_internal <- 1754 <- ksfdblock <- kfk_block_ufs
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