ivanuschak left a comment (kamailio/kamailio#4257)
Memory leak occurs, because `dispatcher` module sends ping requests (OPTIONS)
within a dedicated kamailio process called `slow timer` and during this ping
request processing the memory for AVP is allocated within this `slow timer`
process.
But the AVP releasing procedure is called when kamailio receives reply on the
OPTIONS (or timeout), and it's always done by kamailio processes called `udp
receiver` or `tcp receiver`, but the AVP release is never called from `slow
timer` process. This makes `slow timer` process continiously accumulating
shared memory and never release it.
Possible fix for this memory leak is proposed in this PR -
https://github.com/kamailio/kamailio/pull/4258
When kamailio is running with this fix applied then memory leaking is not
observed.
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