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Cisco Bug: CSCvt70491 - CUC Memory leak issue with CiscoJ causing TOMCAT to be unresponsive

Last Modified

Sep 21, 2020

Products (1)

  • Cisco Unity Connection

Known Affected Releases

12.5

Description (partial)

Symptom:
User interface becomes sluggish or unresponsive. Clients such as Jabber, etc. are unable to login. Tomcat service on the CUC server will stop responding to any http based requests and CUC webpage would also become unreachable..

Conditions:
It has been observed in 12.5SU1 that the tomcat may crashed due to Out Of Memory . It is due to the memory leak in CiscoJ library . The residual memory of Tomcat get  increased because of Cisco J memory leak and due to OOM get crash after few days .

Below is the command through which we can check the Residual Memory of Tomcat on Unity Connection .
admin:show process load
top - 11:41:20 up 19 days,  6:29,  1 user,  load average: 2.46, 2.43, 2.54
Tasks: 303 total,   1 running, 302 sleeping,   0 stopped,   0 zombie
%Cpu(s): 15.7 us, 13.4 sy,  0.7 ni, 69.4 id,  0.0 wa,  0.0 hi,  0.7 si,  0.0 st
KiB Mem :  8008732 total,   260520 free,  4039644 used,  3708568 buff/cache
KiB Swap:  4112280 total,  2244900 free,  1867380 used.  2366016 avail Mem 
  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
30554 tomcat    20   0 3049420   1.2g  13680 S 100.0 15.9  13129:35 tomcat

Alarming situation arise when the Residual memory increase beyond 2 GB .
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