My Oracle Support Banner

Sessions Intermittently Crash with ORA-7445[ksmem_free()+50] in the Alert Log (Doc ID 2411612.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


In a shared server environment, sessions intermittently crash with ORA-7445[ksmem_free()+50] errors in the alert log:

ORA-07445: exception encountered: core dump [ksmem_free()+50] [SIGSEGV] [ADDR:0x7F80422C1FF8] [PC:0xC617C02] [Address not mapped to object] []


The Call Stack Trace in the associated incident trace file shows:

ksmem_free <- ssMemFree <- naetrm <- naectrm <- nadisc <- nsnadisc <- nsclose <- nsdisc <- kmddsl <- kmderr <- kmd_recv_buf <- kmdu2s <- kmdmai <- kmmrdp <- opirip



To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.