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Cisco Bug: CSCuq54043 - Seg Fault@PC: [07aa25cb/X] mmemgr_get_MMEENodeBAssoc()

Last Modified

Dec 24, 2016

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

16.2.0.56422 17.0.0.56585 17.0.0.56815

Description (partial)

seg fault on mmemgr at PC: [07aa25cb/X] mmemgr_get_MMEENodeBAssoc()

Symptom:
Fatal Signal 11: Segmentation fault
  PC: [07aa25cb/X] mmemgr_get_MMEENodeBAssoc()
  Faulty address: 0xc
  Signal from: kernel
  Signal detail: address not mapped to object
  Process: card=1 cpu=0 arch=X pid=5679 cpu=~2% argv0=mmemgr
  Crash time: 2014-Aug-25+08:40:56 UTC
  Recent errno: 11 Resource temporarily unavailable
  Stack (131071@0xfffb2000, probably truncated):
    [07aa25cb/X] mmemgr_get_MMEENodeBAssoc() sp=0xfffb2398
    [07aa36dc/X] mmemgr_process_mme_enodeb_assoc() sp=0xfffb2548
  Last Bounce:
    Src: mmemgr (f=120000,i=8)
    Dst: sessmgr (f=87000,i=59,m=325872)
    ID:  0x7d460a0053fc717d
    Input:  mme_s1apmd_peer_req
    Output: mme_s1apmd_peer_rsp
    Callback: [04113cb0/X] S1apMD_handle_vector_rsp()
    Class: MEDIUM

Conditions:
1. 40 sgs associations and 10k enb associations brought up which are equally distributed in available 8 mmemgrs
2. performed planned card migration.
3. once migration is done and again all the associations came back and distributed equally, brought down the s1 associations by killing lattice 
instance.
4. while enb associations are coming down gave "show mme-service  enodeb-association  sum", which throws the following error and following mmemgr crash is observed in the system.
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