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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Observing deadlock between SIPhandler and SDL Router in CUCM. </span><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333"><br>
<span style="background:white">Looks like this is fixed in glibc 2.17.162 version, but we see the issue still </span><br>
<br>
</span><a href="https://bugzilla.redhat.com/show_bug.cgi?id=906468" title="Follow link"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#3B73AF;background:white;text-decoration:none">https://bugzilla.redhat.com/show_bug.cgi?id=906468</span></a><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white"> </span><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333"><br>
<br>
<span style="background:white">Need help to identify the root cause and add a preventive fix.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Here is the error messages:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">***********************************************************************************************************************************************************************************************************************************<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white"> gdb) thread 40<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">[Switching to thread 40 (Thread 0xaca90b40 (LWP 5935))]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#3 0xf67fdbd1 in malloc () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">(gdb) bt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#0 0xf775a430 in __kernel_vsyscall ()<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#1 0xf688d462 in __lll_lock_wait_private () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#2 0xf68006c0 in _L_lock_14246 () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#3 0xf67fdbd1 in malloc () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#4 0xf6a68907 in operator new(unsigned int) () from /usr/local/cm/lib/libstlport.so.5.2<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#5 0x0936c3f9 in operator() (this=0xaca8dd70) at /view/BLD-cm_12_5_1-cct-ccm-d/vob/ccm/Common/Include/Utilities/Member.hpp:52<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#6 c_str (this=0xaca8dd70) at /view/BLD-cm_12_5_1-cct-ccm-d/vob/ccm/Common/Include/CallManager/TDCLCpShares.hpp:862<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#7 assign (len=12, digits=0xaca8de34 "+19570676705", this=0xaca8dd70) at /view/BLD-cm_12_5_1-cct-ccm-d/vob/ccm/Common/Include/CallManager/TDCLCpShares.hpp:1252<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#8 CdPNumStringVar::CdPNumStringVar (this=0xaca8dd70, digits=0xaca8de34 "+19570676705", len=12) at /view/BLD-cm_12_5_1-cct-ccm-d/vob/ccm/Common/Include/CallManager/TDCLCpShares.hpp:846<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#9 0x092efdf8 in SIPCdpc::processSIPSetupMsg (this=this@entry=0x7de0c8e0, sipContainerWrapper=sipContainerWrapper@entry=0x8e966e78) at ProcessSIPCdpc.cpp:2142<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#10 0x0934086d in SIPCdpc::processSIPSetupInd (this=this@entry=0x7de0c8e0) at ProcessSIPCdpc.cpp:3300<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#11 0x0934ec08 in SIPCdpc::inCall_waitRSVPRes_PolicyAndCACRegisterRes (this=0x7de0c8e0, s=<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Name : "PolicyAndCACRegisterRes",<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Sender : spy:PID (8,100,152,1) "ReservationMgr",<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Receiver : spy:PID (8,100,180,995813) "SIPCdpc",<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Priority : kNormalPriority) at ProcessSIPCdpc.cpp:26471<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#12 0x09e69c7b in SdlProcessBase::inputSignal (this=0x7de0c8e0, rSignal=0x807d8d80, traceType=SdlSystemLog::SignalRouterThread, highPriority=0,
normalPriority=0, lowPriority=0, veryLowPriority=0, lazyPriority=0, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">dbUpdatePriority=0) at SdlProcessBase.cpp:417<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#13 0x09e6ce8a in SdlRouter::callProcess (this=this@entry=0xcfff0e0, _sdlSignal=_sdlSignal@entry=0x807d8d80, _deleteSignal=@0xaca8fdb3: true, _traceType=_traceType@entry=SdlSystemLog::SignalRouterThread,
_hp=0, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">_np=0, _lp=0, _vlp=0, _lzp=0, _dbp=0) at SdlRouter.cpp:257<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#14 0x09e6d60c in SdlRouter::scheduler (this=this@entry=0xcfff0e0) at SdlRouter.cpp:164<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#15 0x09e6dcad in SdlRouter::schedulerInit (sdlRouter=0xcfff0e0) at SdlRouter.cpp:107<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#16 0xf69beb3c in start_thread () from /usr/lib/libpthread.so.0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#17 0xf687f44e in clone () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">(gdb) thread 1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">[Switching to thread 1 (Thread 0xa9136b40 (LWP 5964))]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#0 0xf67fb876 in _int_malloc () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">(gdb) bt<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#0 0xf67fb876 in _int_malloc () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#1 0xf67fdbda in malloc () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#2 0xf6a68907 in operator new(unsigned int) () from /usr/local/cm/lib/libstlport.so.5.2<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#3 0x09cd4ce2 in sip_get_sipspi_message () at sip_common_spi.cpp:20059<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#4 0x09cf94d1 in sipTransportPostSendMessage (msg=0x8a20a150, gcb=gcb@entry=0x8015d208, tcb_context=..., connId=24, destAddr=0x8015d228, destPort=5061,
transport=SIP_TRANSPORT_TLS_OVER_TCP, emit_debugs=1 '\001', <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">ip_sig_tos=0 '\000') at sip_common_transport.cpp:3032<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#5 0x09cf9946 in sipTransportLogicSendMsg (gcb=gcb@entry=0x8015d208, sw_transport=sw_transport@entry=0 '\000') at sip_common_transport.cpp:2367<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#6 0x09cfab6f in sipSPITransportSendMessage (msg=msg@entry=0x8a20a150, context=context@entry=0x8015d208, addr=addr@entry=0xa91355dc, port=port@entry=5061,
sentBy_port=sentBy_port@entry=0, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">is_request=is_request@entry=1 '\001', transport=transport@entry=SIP_TRANSPORT_TLS_OVER_TCP, sw_transport=0 '\000', func=func@entry=0x9cb0080 <sentAck(_sipGenericCB*)>,
tcb_context=...)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">at sip_common_transport.cpp:3323<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#7 0x09cbe638 in sipSPISendAck (ccb=0x8015d208, flags=flags@entry=0, func=0x9cb0080 <sentAck(_sipGenericCB*)>) at sip_common_send_msg.cpp:2992<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#8 0x09ccc910 in sipSPISendAckForMidCallInvite (ccb=0x8015d208, flag=flag@entry=0) at sip_common_spi.cpp:8745<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#9 0x09ccdb37 in sact_sent_mid_invite_new_message_response (ccb=0x8015d208, response=0x89305d58) at sip_common_spi.cpp:9278<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#10 0x09cda815 in ccsip_spi_process_event (freeEvent=0xa91359df "\001", event=0x7ca43348) at sip_common_spi.cpp:19333<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#11 ccsip_process_sipspi_queue_event (event=event@entry=0x7ca43348) at sip_common_spi.cpp:19997<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#12 0x093ef758 in SIPHandler::wait_SIPNormalizeRes (this=0xac1c05e8, s=<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Name : "SIPNormalizeRes",<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Sender : spy:PID (8,100,184,1) "SIPNormalization",<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Receiver : spy:PID (8,100,183,1) "SIPHandler",<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">Priority : kNormalPriority) at ProcessSIPHandler.cpp:1683<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#13 0x09e69c7b in SdlProcessBase::inputSignal (this=this@entry=0xac1c05e8, rSignal=rSignal@entry=0x7d2f8a78, traceType=SdlSystemLog::SignalThreadedWithPriorities,
highPriority=0, normalPriority=0, lowPriority=0, <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">veryLowPriority=0, lazyPriority=0, dbUpdatePriority=0) at SdlProcessBase.cpp:417<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#14 0x09e8d2fd in SdlThreadedProcess::threadQueueReader (this=this@entry=0xac1c05e8) at SdlThreadedProcess.cpp:110<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#15 0x09e8d56d in SdlThreadedProcess::threadQueueReaderInit (sdlThreadedProcess=0xac1c05e8) at SdlThreadedProcess.cpp:75<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#16 0xf69beb3c in start_thread () from /usr/lib/libpthread.so.0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">#17 0xf687f44e in clone () from /usr/lib/libc.so.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">BOth the threads are allocated memory at the same time , eventually resulting in deadlock.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#333333;background:white">-Thanks</span><o:p></o:p></p>
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