Preview Tool

Cisco Bug: CSCum62465 - SGSN hangs and lots of Assertion failure at snutil/sn_memblock.c:188

Last Modified

Jan 30, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

14.0(38) 15.0(16)

Description (partial)

SGSN running build 15.0 (52963) hang for 30 seconds and many sessmgr crashes occurred with the same signature causing all subscribers to be disconnected. 

********************* CRASH #03 ***********************
SW Version          : 15.0(52963)
Similar Crash Count : 29
Time of First Crash : 2014-Jan-16+14:11:51

Assertion failure at snutil/sn_memblock.c:188
  Function: sn_memblock_cache_get_mcblock_by_addr_slow()
  Expression: mcblock
  Proclet: sessmgr (f=87000,i=7)
  Process: card=5 cpu=0 arch=X pid=6362 cpu=~10% argv0=sessmgr
  Crash time: 2014-Jan-16+13:12:14 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (3032@0xffffd000):
    [f7e285a1/X] sp=0xffffd268
    [0a9d1c33/X] sn_assert() sp=0xffffd298
    [0a9cc0e4/X] sn_memblock_cache_get_mcblock_by_addr_slow() sp=0xffffd2d8
    [0a9cc2d9/X] sn_memblock_cache_free() sp=0xffffd308
    [06698f61/X] sessmgr_gprs_sgsn_context_suspend_rsp() sp=0xffffd4a8
    [067df64d/X] sn_gt_handle_suspend_time_out() sp=0xffffd508
    [051b261a/X] tlib_serv() sp=0xffffd548
    [051b233b/X] tlib_tmr_tick() sp=0xffffd578
    [046937df/X] snx_timer_service() sp=0xffffd598
    [0469217f/X] snx_fast_service() sp=0xffffd5c8
    [05c6b494/X] sessmgr_snx_tick_callback() sp=0xffffd5f8
    [0aa61a46/X] sn_loop_run() sp=0xffffdb88
    [0a84b6f4/X] main() sp=0xffffdbc8

This happened after modifying a command by adding network-sharing common-plmn mcc 238 mnc 66

The command that was modified/added in under gprs-service gprs:

       plmn id mcc 238 mnc 02 network-sharing common-plmn mcc 238 mnc 66
Bug details contain sensitive information and therefore require a 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.