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Cisco Bug: CSCvt21707 - CFS Process Crashes Due to Memory Exhaustion

Last Modified

Jul 30, 2020

Products (1)

  • Cisco Nexus 5000 Series Switches

Known Affected Releases


Description (partial)

A Nexus5548 running 7.0(7)N1(1) may crash due to low memory.

The system reset reason may show as below:

Reason: Reset triggered due to HA policy of Reset
  System version: 7.0(7)N1(1)
  Service: cfs hap reset

A "show cores" may show a core in the cfs process.

The "show processes log details " output should show similar to below where the RLIMIT_AS value is close to the TOTAL value (meaning that the process memory for cfs is exhausted).

Service: cfs
Description: CFS Service
Executable: /isan/bin/cfs

Started at Sat Sep 17 13:50:30 2016 (182680 us)
Stopped at Tue Oct 29 07:05:02 2019 (435579 us)
Uptime: 1136 days 17 hours 14 minutes 32 seconds

Last heartbeat 0.63 secs ago
RLIMIT_AS: 584696780
System image name: n5000-uk9.7.0.7.N1.1.bin
System image version: 7.0(7)N1(1) S0

PID: 3688 
Exit code: signal 6 (core dumped)

CWD: /var/sysmgr/work

RLIMIT_AS:      584696780

Virtual Memory:

    CODE      08048000 - 08139788
    DATA      0813A788 - 08142A28
    BRK       0884F000 - 1AB8B000
    STACK     7F809060

This could be triggered by a config change or network event particular on systems configured with features that leverage CFS.
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