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Cisco Bug: CSCup85541 - %SYS-4-CHUNKSIBLINGSEXCEED leak observed with "Pathents for pa"

Last Modified

May 23, 2020

Products (17)

  • Cisco IOS
  • Cisco 7206 Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco 7301 Router
  • Cisco 7206VXR Router
  • Cisco 7204 Router
  • Cisco 7202 Router
  • Cisco 7600 Series Route Switch Processor 720 with Multilayer Switch Feature Card
  • Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks
  • Cisco ME 3600X-24FS-M Switch
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Known Affected Releases

15.2(4)S2 15.3(1)S1.9

Description (partial)

A sibling chunk leak will be seen over time when path entries are being created. Once the number of allocatoins has exceeded the 10000 threshold, the following messages will be seen and there may be growth in Chunk Manager process: 

SYS-4-CHUNKSIBLINGSEXCEED: Number of siblings in a chunk has gone above the threshold. Threshold:10000 Sibling-Count:10040 Chunk:0x52E5C4CC Name:Pathents for pa -Process= "Chunk Manager", ipl= 5, pid= 1


From the "show memory allocating-process total", we can see the following process holding memory:

    PC          Total   Count  Name
0x40DB746C  108357652   10055  Pathents for pa

-The leak is seen in failed operations while copying either the running/starting configuration to remotely. The amount of memory leaked over time is 10-15KB which suggests this may can take awhile before symptoms manifest.

-Confirmed impact in 15.2S releases
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