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Cisco Bug: CSCuq90477 - Crash after SYS-3-MGDTIMER: Timer has parent, timer link, timer error

Last Modified

Sep 13, 2018

Products (170)

  • Cisco Catalyst 3750-X Series Switches
  • Cisco Catalyst 2960-48TT-S Switch
  • Cisco Catalyst 2960-24-S Switch
  • Cisco Catalyst 3560X-48P-S Switch
  • Cisco Catalyst 3560E-48PD-SF Switch
  • Cisco Catalyst 3560E-24TD-S Switch
  • Cisco Catalyst 3560X-48T-E Switch
  • Cisco Catalyst 2960S-F48FPS-L Switch
  • Cisco Catalyst 2960C-12PC-L Switch
  • Cisco Catalyst 3560X-48U-S Switch
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Known Affected Releases

15.0(2)SE5

Description (partial) 

Symptom:
Device crashed after the following error

%SYS-2-NOBLOCK: may_suspend with blocking disabled. -Process= "hpm main process", ipl= 0, pid= 118

Traceback= 4D69C4z 228B4C8z 188B6B4z 1E51C10z 1DC6EA4z 1DC7340z 1FFBC10z 1FFC1B0z 1618B5Cz 1FFD2FCz 1618AF4z 1FF244Cz 1FC2258z 1DCD714z 1DCDA28z 1ECEAB0z

%SYS-3-MGDTIMER: Timer has parent, timer link, timer = 413FF08. -Process= "hpm main process", ipl= 6, pid= 118

-Traceback= 4D69C4z 184158Cz 18892F4z 1DCB4B8z 22908B8z 228B00Cz

Conditions:
Occurs only on CBS3110-X switches. It is a timing issue related to process scheduling.

The code path where this issue is triggered can be hit only on a state change (link up / link down) of port 14 on the switch (i.e. the internal port connected to server 14 in the blade chassis).
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