Guest

Preview Tool

Cisco Bug: CSCuq33907 - scheduler isr-watchdog halts while trying to recover device during hang

Last Modified

Feb 02, 2017

Products (96)

  • Cisco IOS
  • Cisco VG204XM Analog Voice Gateway
  • Cisco 2951 Integrated Services Router
  • Cisco C892FSP Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 898 Secure G.SHDSL EFM/ATM with Multi-Mode 4G LTE ISR Router
  • Cisco 886VAG 3G Integrated Services Router
  • Cisco 819 Hardened Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco C897VA Integrated Services Router
View all products in Bug Search Tool Login Required

Known Affected Releases

15.4(3)M

Description (partial)

Symptom:
Device is hanging due to a software bug that is detected after the configuration of 'scheduler isr-watchdog'.  The router dumps watchdog registers, but then halts and a power cycle is required:

Conditions:
XX:XX:XX UTC XXX XXX XX XXXX: Breakpoint exception, CPU signal 23, PC = 0xXXXXXXXX
--------------------------------------------------------------------
   Possible software fault.
   Please collect crashinfo, "show tech" and contact Cisco Technical Support.
--------------------------------------------------------------------
-Traceback= 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX  
$0 : XXXXXXXX XXXXXXXX, AT : XXXXXXXX XXXXXXXX, v0 : XXXXXXXX XXXXXXXX, v1 : XXXXXXXX XXXXXXXX
a0 : XXXXXXXX XXXXXXXX, a1 : XXXXXXXX XXXXXXXX, a2 : XXXXXXXX XXXXXXXX, a3 : XXXXXXXX XXXXXXXX
t0 : XXXXXXXX XXXXXXXX, t1 : XXXXXXXX XXXXXXXX, t2 : XXXXXXXX XXXXXXXX, t3 : XXXXXXXX XXXXXXXX
t4 : XXXXXXXX XXXXXXXX, t5 : XXXXXXXX XXXXXXXX, t6 : XXXXXXXX XXXXXXXX, t7 : XXXXXXXX XXXXXXXX
s0 : XXXXXXXX XXXXXXXX, s1 : XXXXXXXX XXXXXXXX, s2 : XXXXXXXX XXXXXXXX, s3 : XXXXXXXX XXXXXXXX
s4 : XXXXXXXX XXXXXXXX, s5 : XXXXXXXX XXXXXXXX, s6 : XXXXXXXX XXXXXXXX, s7 : XXXXXXXX XXXXXXXX
t8 : XXXXXXXX XXXXXXXX, t9 : XXXXXXXX XXXXXXXX, k0 : XXXXXXXX XXXXXXXX, k1 : XXXXXXXX XXXXXXXX
gp : XXXXXXXX XXXXXXXX, sp : XXXXXXXX XXXXXXXX, s8 : XXXXXXXX XXXXXXXX, ra : XXXXXXXX XXXXXXXX
EPC  : XXXXXXXX, ErrorEPC : XXXXXXXX, SREG     : XXXXXXXX
MDLO : XXXXXXXX, MDHI     : XXXXXXXX, BadVaddr : XXXXXXXX
CacheErr_Icache : 0xXXXXXXXX - 0xXXXXXXXX, CacheErr_Dcache : 0xXXXXXXXX - 0xXXXXXXXX
TagLo_Icache : 0xXXXXXXXX - 0xXXXXXXXX, DataLo_Icache : 0xXXXXXXXX - 0xXXXXXXXX
DataHi_Icache: 0xXXXXXXXX - 0xXXXXXXXX
TagLo_Dcache : 0xXXXXXXXX - 0xXXXXXXXX, TagHi_Dcache : 0xXXXXXXXX - 0xXXXXXXXX
DataLo_Dcache: 0xXXXXXXXX - 0xXXXXXXXX, DataHi_Dcache : 0xXXXXXXXX - 0xXXXXXXXX
TEXT_START : 0xXXXXXXXX
DATA_START : 0xXXXXXXXX
Cause 00000424 (Code 0x9): Breakpoint exception
Process watchdog registers:
$0 : XXXXXXXX, AT : XXXXXXXX, v0 : XXXXXXXX, v1 : XXXXXXXX
a0 : XXXXXXXX, a1 : XXXXXXXX, a2 : XXXXXXXX, a3 : XXXXXXXX
t0 : XXXXXXXX, t1 : XXXXXXXX, t2 : XXXXXXXX, t3 : XXXXXXXX
t4 : XXXXXXXX, t5 : XXXXXXXX, t6 : XXXXXXXX, t7 : XXXXXXXX
s0 : XXXXXXXX, s1 : XXXXXXXX, s2 : XXXXXXXX, s3 : XXXXXXXX
s4 : XXXXXXXX, s5 : XXXXXXXX, s6 : XXXXXXXX, s7 : XXXXXXXX
t8 : XXXXXXXX, t9 : XXXXXXXX, k0 : XXXXXXXX, k1 : XXXXXXXX
gp : XXXXXXXX, sp : XXXXXXXX, s8 : XXXXXXXX, ra : XXXXXXXX
EPC : XXXXXXXX, SP : XXXXXXXX, forkx : XXXXXXXX

-Traceback=  0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX 0xXXXXXXXX
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.