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Cisco Bug: CSCuq00164 - MME Crash: sessmgr Assertion mme_im_entry_state_idle_handle_s1_rls_req()

Last Modified

Dec 25, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

15.0(16)

Description (partial)

Symptom:
MME crash with Assertion Failure has the following stack trace:

Assertion failure at sess/mme/mme-app/app/mme_im_entry_proc.c:328
  Function: mme_im_entry_state_idle_handle_s1_rls_req()
  Expression: (((ue_sgw) != ((void *)0)) && ((ue_sgw)->usc_magic == (('M'<<24)|('U'<<16)|('S'<<8)|('C'))))
  Proclet: sessmgr (f=87000,i=34)
  Process: card=2 cpu=0 arch=X pid=14647 cpu=~0% argv0=sessmgr
  Crash time: 2014-Jul-16+07:41:42 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (7096@0xffffc000):
    [f7e285a1/X] libc.so.6/kill() sp=0xffffcee8
    [0a9d2473/X] sn_assert() sp=0xffffcf18
    [07723987/X] mme_im_entry_state_idle_handle_s1_rls_req() sp=0xffffcf58
    [07694a09/X] mme_fsm_event_handler() sp=0xffffd3b8
    [077244b3/X] mme_start_im_entry_procedure() sp=0xffffd3f8
    [076952f8/X] mme_start_procedure() sp=0xffffd438
    [076e1912/X] mme_dispatcher_mme_offload_start_tmr_expiry() sp=0xffffd4e8
    [051b26ea/X] tlib_serv() sp=0xffffd528
    [051b240b/X] tlib_tmr_tick() sp=0xffffd558
    [046938af/X] snx_timer_service() sp=0xffffd578
    [0469224f/X] snx_fast_service() sp=0xffffd5a8
    [05c6b8f4/X] sessmgr_snx_tick_callback() sp=0xffffd5d8
    [0aa62286/X] sn_loop_run() sp=0xffffdb68
    [0a84bf34/X] main() sp=0xffffdba8

Although an activity was being performed during this time period, this crash doesn't seem to correlate to a specific command being run.
Below are all the commands which were run within a few minutes of the crash appearing, and all of them are show commands:

[local]BBCMME51000-144]: show sub full msisdn 14167686404
[local]BBCMME51000-144]: show sub full msisdn 14167686404
[mme_ctx]BBCMME51000-144]: show subscribers summary | grep Total
[mme_ctx]BBCMME51000-144]: show subscribers summary | grep Total
[mme_ctx]BBCMME51000-144]: show subscribers summary | grep Total
[mme_ctx]BBCMME51000-144]: show subscribers summary | grep Total

Conditions:
Image Version:                  15.0 (54826)
  Image Branch Version:           015.000(016)
  Image Description:              Production_Build
  Image Date:                     Fri May  2 10:36:06 EDT 2014
  Boot Image:                     /flash/production.54826.asr5000.bin
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