My Oracle Support Banner

HP-UX: Session Hanging Indefinitely With Event "kfk: async disk IO" (Doc ID 2246456.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 to 12.2.0.1 [Release 11.2 to 12.2]
HP-UX Itanium

Symptoms

Sessions hang for many hours or indefinitely until it got killed manually.

The hang occurs randomly with wait event "kfk: async disk IO" on all 6 nodes of the RAC database without any particular pattern. The same hang occurs in single instance environment with ASM.

 

[Call stack like this on the hanging process:

Short stack dump:
ksedsts()+592<-ksdxfstk()+48<-ksdxcb()+3376<-sspuser()+688 <-<kernel<-_read_sys()+48<-_read()+224<-skgfospo()+608<-$cold_skgfrwat()+208 <-ksfdwtio()+1232<-ksfdwat_internal()+1072<-kfk_reap_ufs_async_io()+224
<-kfk_reap_ios_from_subsys()+192<-kfkClose()+1184<-kfddsClean()+288<-kfddpslutcb()+48<-kfupsReleaseAll()+480<-kfupsReleaseAll()+224 <-kfupsReleaseAll()+224<-kfupsReleaseAll()+224<-$cold_kfdNotify()+192
<-kscnfy()+1872<-ksuabt()+1008<-$cold_opidrv()+1344<-sou2o()+256 <-opimai_real()+352<-ssthrdmain()+608<-main()+336<-main_opd_entry()+80

]

 

 

Cause

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

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


In this Document
Symptoms
Cause
Solution
References


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