3.0: Agent crash @ fd_ == VmFlowRef::kInvalidFd"

Solution scripts doing flow setup/teardown.

3.0 b2712

core file location: 10.84.5.112:/cs-shared/bugs/<bug-id>

ImportError: No module named 'libstdcxx'
(gdb) bt
#0 0x00007f28e8d21cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007f28e8d250d8 in __GI_abort () at abort.c:89
#2 0x00007f28e8d1ab86 in __assert_fail_base (fmt=0x7f28e8e6b830 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
    assertion=assertion@entry=0x11fd44e "fd_ == VmFlowRef::kInvalidFd", file=file@entry=0x11fd620 "controller/src/vnsw/agent/pkt/flow_entry.cc",
    line=line@entry=116,
    function=function@entry=0x11fdb80 <VmFlowRef::operator=(VmFlowRef const&)::__PRETTY_FUNCTION__> "void VmFlowRef::operator=(const VmFlowRef&)")
    at assert.c:92
#3 0x00007f28e8d1ac32 in __GI___assert_fail (assertion=0x11fd44e "fd_ == VmFlowRef::kInvalidFd",
    file=0x11fd620 "controller/src/vnsw/agent/pkt/flow_entry.cc", line=116,
    function=0x11fdb80 <VmFlowRef::operator=(VmFlowRef const&)::__PRETTY_FUNCTION__> "void VmFlowRef::operator=(const VmFlowRef&)") at assert.c:101
#4 0x0000000000c0c735 in VmFlowRef::operator= (this=<optimized out>, rhs=...) at controller/src/vnsw/agent/pkt/flow_entry.cc:116
#5 0x0000000000c12b75 in operator= (this=0x7f28cde78900) at controller/src/vnsw/agent/pkt/flow_entry.h:218
#6 FlowEntry::Copy (this=this@entry=0x7f28cde788a0, rhs=rhs@entry=0x7f28cdea1020) at controller/src/vnsw/agent/pkt/flow_entry.cc:371
#7 0x0000000000c1923e in Copy (rhs=0x7f28cdea1020, lhs=0x7f28cde788a0, this=0x7f28cc4488b0) at controller/src/vnsw/agent/pkt/flow_table.cc:117
#8 FlowTable::AddInternal (this=0x7f28cc4488b0, flow_req=0x7f28cdea1020, flow=0x7f28cde788a0, rflow_req=0x7f28cdea0b80, rflow=0x7f28cdea0b80,
    update=<optimized out>) at controller/src/vnsw/agent/pkt/flow_table.cc:165
#9 0x0000000000c19430 in FlowTable::Add (this=this@entry=0x7f28cc4488b0, flow_req=flow_req@entry=0x7f28cdea1020, flow=flow@entry=0x7f28cde788a0,
    rflow_req=rflow_req@entry=0x7f28cdea0b80, rflow=0x7f28cdea0b80, update=update@entry=false) at controller/src/vnsw/agent/pkt/flow_table.cc:232
#10 0x0000000000c1954f in FlowTable::Add (this=0x7f28cc4488b0, flow=flow@entry=0x7f28cdea1020, rflow=0x7f28cdea0b80)
    at controller/src/vnsw/agent/pkt/flow_table.cc:137
#11 0x0000000000c2ea54 in FlowProto::AddFlow (this=<optimized out>, flow=flow@entry=0x7f28cdea1020) at controller/src/vnsw/agent/pkt/flow_proto.cc:177
#12 0x0000000000c3a4f1 in PktFlowInfo::Add (this=this@entry=0x7f28c05726c0, pkt=<optimized out>, in=in@entry=0x7f28c0572640, out=out@entry=0x7f28c0572680)
    at controller/src/vnsw/agent/pkt/pkt_flow_info.cc:1732
#13 0x0000000000c4824c in FlowHandler::Run (this=0x7f28701756b0) at controller/src/vnsw/agent/pkt/flow_handler.cc:128
#14 0x0000000000c44848 in RunProtoHandler (handler=0x7f28701756b0, this=0x7f28c0572880) at controller/src/vnsw/agent/pkt/proto.cc:51
#15 Proto::ProcessProto (this=this@entry=0x7f28cc469760, msg_info=...) at controller/src/vnsw/agent/pkt/proto.cc:67
#16 0x0000000000c2e572 in FlowProto::FlowEventHandler (this=0x7f28cc469760, req=..., table=0x7f28cc4488b0)
    at controller/src/vnsw/agent/pkt/flow_proto.cc:263
#17 0x0000000000c338f8 in operator() (a0=<error reading variable: access outside bounds of object referenced via synthetic pointer>, this=0x7f28c0572900)
    at /usr/include/boost/function/function_template.hpp:767
#18 QueueTaskRunner<FlowEvent, WorkQueue<FlowEvent> >::RunQueue (this=0x1fb5d10) at controller/src/base/queue_task.h:87
#19 0x00000000011793ec in TaskImpl::execute (this=0x7f28e258bc40) at controller/src/base/task.cc:253
#20 0x00007f28e98f0b3a in ?? () from /usr/lib/libtbb.so.2
#21 0x00007f28e98ec816 in ?? () from /usr/lib/libtbb.so.2
#22 0x00007f28e98ebf4b in ?? () from /usr/lib/libtbb.so.2
#23 0x00007f28e98e80ff in ?? () from /usr/lib/libtbb.so.2
#24 0x00007f28e98e82f9 in ?? () from /usr/lib/libtbb.so.2
#25 0x00007f28e9b0c182 in start_thread (arg=0x7f28c0573700) at pthread_create.c:312
#26 0x00007f28e8de547d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111