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Cisco Bug: CSCta47057 - Media Resource Re-Registration Causes CCM To Leak Memory

Last Modified

Feb 21, 2018

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


Description (partial)


CCM is leaking memory. This may occur at a very fast pace of 12MB per hour, or could occur much slower over longer periods of time depending on the conditions.


This can occur when Media Resources such as CFBs and ANNs continually register and unregister. The memory leak only occurs when unique names are entered into the DA and Call Forward Dynamic tables (the bXXXXXXXXXX entries for conferences for example).

Devices that do not register with unique names in those tables will simply overwrite the old entry which DOES NOT cause a memory leak.

In the case of a fast memory leak, you would look for a conference bridge that is constantly registering and unregistering. In this case, the customer had two CFBs that were registering with the same name and because of that, they were cycling every 10-15 seconds creating 24 entries in those tables each time.

For slower memory leaks, the conditions are the same except the registration/deregistration would be happening at a slower pace. Rather than being caused by a duplicate device name, it would be caused by network issues or regular device resets that happen over the course of time.
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