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Cisco Bug: CSCvv20551 - Task restart while processing path switch request

Last Modified

Jul 31, 2020

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

21.14.12.74011

Description (partial)

Symptom:
Sessmgr restart while processing path switch request with following stacks:

<div style="font-family:monospace;border-radius: 4px;padding: 6px;">Assertion failure at sess/mme/mme-app/app/mme_x2_handover_proc.c:883
  Function: mme_x2_ho_process_path_sw_req_msg()
  Expression: sn_status != SN_STATUS_FAILURE
  Proclet: sessmgr (f=87000,i=23)
  Process: card=4 cpu=0 arch=X pid=9801 cpu=~2% argv0=sessmgr
  Cr@sh time: 2020-Jul-27+16:13:15 UTC
  Recent errno: 11 Resource temporarily unavailable
  Build_number: 74011
  Stack (131071@0x0xffbd4000, probably truncated):
    [ffffe430/X] __kernel_vsyscall() sp=0xffbd4e68
    [0ce03e95/X] sn_assert() sp=0xffbd4ea8
    [08e6752c/X] mme_x2_ho_process_path_sw_req_msg() sp=0xffbf3ba8
    [08e6765a/X] mme_x2_ho_state_awt_dns_sgw_resp() sp=0xffbf3d58
  Last Bounce:</div>

Or

<div style="font-family:monospace;border-radius: 4px;padding: 6px;">Assertion failure at sess/mme/mme-app/app/mme_x2_handover_proc.c:883
  Function: mme_x2_ho_process_path_sw_req_msg()
  Expression: sn_status != SN_STATUS_FAILURE
  Proclet: sessmgr (f=87000,i=38)
  Process: card=6 cpu=0 arch=X pid=9836 cpu=~2% argv0=sessmgr
  Cr@sh time: 2020-Jul-29+18:47:34 UTC
  Recent errno: 11 Resource temporarily unavailable
  Build_number: 74011
  Stack (131071@0x0xffc6f000, probably truncated):
    [ffffe430/X] __kernel_vsyscall() sp=0xffc6fa38
    [0ce03e95/X] sn_assert() sp=0xffc6fa78
    [08e6752c/X] mme_x2_ho_process_path_sw_req_msg() sp=0xffc8e778
    [08e6765a/X] mme_x2_ho_state_awt_dns_sgw_resp() sp=0xffc8e928
    [08e2d368/X] mme_fsm_event_handler() sp=0xffc8ede8
    [08e9e3e3/X] mme_event_handler_x2_ho_procedure() sp=0xffc8ee28
    [08c20cd0/X] mme_procedure_handle_event() sp=0xffc8eea8
  Last Bounce:</div>

Conditions:
To be determined
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