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ORA-7445 [qsmqiscn] on Materialized View (Doc ID 1670626.1)

Last updated on MARCH 10, 2020

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.2]
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.


 Operations on materialized view may fail with error message ORA-7445 [qsmqiscn].

As an example:

drop materialized view test_mv;
drop materialized view test_mv;
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 16041
Session ID: 695 Serial number: 51873

Below,error message can be seen nearly the same time in alert log/trace files:

ORA-07445: exception encountered: core dump [qsmqiscn()+50] [SIGSEGV] [ADDR:0xC0] [PC:0x1F1678E] [Address not mapped to object] []

skdstdst <- ksedst1 <- ksedst <- dbkedDefDump <- ksedmp
<- ssexhd <- sighandler <- qsmqiscn <- dtbdrp <- dtbdrv
<- opiexe <- opiosq0 <- opiosq <- opiodr <- rpidrus
<- skgmstack <- rpiswu2 <- rpidrv <- rpisplu <- kkzdsn
<- opiexe <- opiosq0 <- kpooprx <- kpoal8 <- opiodr
<- ttcpip <- opitsk <- opiino <- opiodr <- opidrv
<- sou2o <- opimai_real <- ssthrdmain <- main


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