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res_pjsip: Deny requests when threadpool queue is backed up.

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We have observed situations where the SIP threadpool may become
deadlocked. However, because incoming traffic is still arriving, the SIP
threadpool's queue can continue to grow, eventually running the system
out of memory.

This change makes it so that incoming traffic gets rejected with a 503
response if the queue is backed up too much.

Change-Id: I4e736d48a2ba79fd1f8056c0dcd330e38e6a3816
This commit is contained in:
Mark Michelson
2015-11-11 17:11:53 -06:00
parent 7ae22c2690
commit 2f9cb7d62b
7 changed files with 44 additions and 7 deletions
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6
include/asterisk/res_pjsip.h
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@@ -2116,4 +2116,10 @@ int ast_sip_get_host_ip(int af, pj_sockaddr *addr);
*/
const char *ast_sip_get_host_ip_string(int af);
/*!
* \brief Return the size of the SIP threadpool's task queue
* \since 13.7.0
*/
long ast_sip_threadpool_queue_size(void);
#endif /* _RES_PJSIP_H */