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Cisco Bug: CSCvu85058 - Cat3850 stack sessmgrd leak in Polaris 16.9.5

Last Modified

Jul 17, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.9.5

Description (partial)

Symptom:
3850 switch stack running 16.9.5 IOS-XE may reach >90% platform memory utilization and crash eventually.

Up to 2 GB is held by sessmgrd process and increasing. Below outputs taken with 1 day difference:

BEFORE:
show processes memory platform sorted
System memory: 3976852K total, 3656456K used, 320396K free,
Lowest: 320396K
   Pid    Text      Data   Stack   Dynamic       RSS     Total              Name  
--------------------------------------------------------------------------------
 23203     178   1919572     132   1839996   1919572   2172888          sessmgrd  
 12524  171452    625876     136       296    625876   2130364   linux_iosd-imag  

AFTER:
#show processes memory platform sorted
System memory: 3976852K total, 3654716K used, 322136K free,
Lowest: 322136K
   Pid    Text      Data   Stack   Dynamic       RSS     Total              Name  
--------------------------------------------------------------------------------
 23203     178   1939840     132   1866284   1939840   2199176          sessmgrd  <<< significant increase of RSS counter in 1 day
 12524  171452    608384     136       296    608384   2130364   linux_iosd-imag

Conditions:
N/A
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