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Cisco Bug: CSCus36208 - PTPLC core triggers by memory leak

Last Modified

May 17, 2018

Products (9)

  • Cisco Nexus 6000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5672UP Switch
  • Cisco Nexus 56128P Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

7.0(2)N1(1)

Description (partial)

Symptom:
PTPLC crashes unexpectedly, the device logs include this message:

%SYSMGR-2-SERVICE_CRASHED: Service "ptplc" (PID 3604) hasn't caught signal 6 (core will be saved).
%SYSMGR-2-HAP_FAILURE_SUP_RESET: System reset due to service "ptplc" in vdc 1 has had a hap failure

Conditions:
The crash triggers by a memory leak specific to PTP interaction with ACL.

Run 'show processes log details' to identify if the memory usage of PTPLC was at critical level

`show processes log details`
======================================================
Service: ptplc
Description: PTPLC Daemon
Executable: /isan/bin/ptplc

Started at Tue Mar  3 17:04:08 2015 (280021 us)
Stopped at Sat Apr 28 15:10:10 2018 (221012 us)
Uptime: 1151 days 21 hours 6 minutes 2 seconds

Start type: SRV_OPTION_RESTART_STATELESS (23)
Death reason: SYSMGR_DEATH_REASON_FAILURE_SIGNAL (2)
Last heartbeat 0.00 secs ago

RLIMIT_AS:      359785676 <<< Maximum memory allowed

Virtual Memory:

    CODE      08048000 - 0807C264
    DATA      0807D264 - 0807F3C8
    BRK       08086000 - 0E367000
    STACK     7FD93150
    TOTAL     351344 KB <<< Consumed memory, which is almost the same as the maximum
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