When using Policy Server, it runs into a deadlock and stop serving requests. What we can see from pstack during hung status:

Thread 77 (Thread 0xac9bbb90 (LWP 1353)): 

..#3 0x00e1b9f3 in EnterCriticalSection(_critsection*) () from /opt/ca/siteminder/lib/libsmcommonutil.so 

#5 0x00686a39 in CSmObjDictVendor::LookupVendor(CSmObjId const&) () from /opt/ca/siteminder/lib/libsmobj.so 

#6 0x0816fb8a in CSmAgentIdentity::FetchDevice() () 

#7 0x0816ed71 in CSmAgentIdentity::SetAgentIdentity(CString&, int, CString&) () 

This issue is fixed in R12.52 SP1 CR06:

https://docops.ca.com/ca-single-sign-on/12-52-sp1/en/release-notes/cumulative-releases/defects-fixed-in-12-52-sp1-cr06#DefectsFixedin12.52SP1CR06-PolicyServer

(DE177765)

> Policy Server hangs when connection limit is exceeded

KD :TEC1738989