Crash in Coordinator::runtime_state()+0x17

last week I merge Apache branch running two days crashed two times

Core was generated by `/export/servers/impala/be/build/release/service/impalad -use_local_tz_for_unix_'.
#0 boost::scoped_ptr<impala::RuntimeState>::get (this=0x488) at /usr/local/include/boost/smart_ptr/scoped_ptr.hpp:105
105 return px;
[Current thread is 1 (LWP 2023)]
(gdb) bt
#0 boost::scoped_ptr<impala::RuntimeState>::get (this=0x488) at /usr/local/include/boost/smart_ptr/scoped_ptr.hpp:105
#1 impala::PlanFragmentExecutor::runtime_state (this=0x360) at /export/ldb/online/impala/be/src/runtime/plan-fragment-executor.h:140
#2 impala::Coordinator::runtime_state (this=this@entry=0x7f732ea6e000) at /export/ldb/online/impala/be/src/runtime/coordinator.cc:1556
#3 0x000000000109e3bc in impala::Coordinator::GetNext (this=0x7f732ea6e000, results=results@entry=0x7f78429b1000, max_rows=max_rows@entry=1024, eos=eos@entry=0xa222fc1)
at /export/ldb/online/impala/be/src/runtime/coordinator.cc:1109
#4 0x0000000000d6ed57 in impala::ImpalaServer::QueryExecState::FetchRowsInternal (this=this@entry=0xa222400, max_rows=max_rows@entry=1024, fetched_rows=fetched_rows@entry=0x7f78429b1000)
at /export/ldb/online/impala/be/src/service/query-exec-state.cc:788
#5 0x0000000000d6f069 in impala::ImpalaServer::QueryExecState::FetchRows (this=0xa222400, max_rows=max_rows@entry=1024, fetched_rows=fetched_rows@entry=0x7f78429b1000)
at /export/ldb/online/impala/be/src/service/query-exec-state.cc:694
#6 0x0000000000d6809b in impala::ImpalaServer::FetchInternal (this=this@entry=0x8cbea00, query_id=..., start_over=start_over@entry=false, fetch_size=fetch_size@entry=1024,
query_results=query_results@entry=0x7f79de2b4650) at /export/ldb/online/impala/be/src/service/impala-beeswax-server.cc:508
#7 0x0000000000d68715 in impala::ImpalaServer::fetch (this=0x8cbea00, query_results=..., query_handle=..., start_over=<optimized out>, fetch_size=1024)
at /export/ldb/online/impala/be/src/service/impala-beeswax-server.cc:171
#8 0x0000000000ff810d in beeswax::BeeswaxServiceProcessor::process_fetch (this=0x8bd39c0, seqid=0, iprot=0x7f782ff587b0, oprot=0x7f74a8cafc80, connectionContext=<optimized out>)
at /export/ldb/online/impala/be/generated-sources/gen-cpp/BeeswaxService.cpp:3474
#9 0x0000000000febd91 in beeswax::BeeswaxServiceProcessor::dispatchCall (this=<optimized out>, iprot=0x7f782ff587b0, oprot=0x7f74a8cafc80, fname=..., seqid=0, connectionContext=0x7f6fdcdd2c90)
at /export/ldb/online/impala/be/generated-sources/gen-cpp/BeeswaxService.cpp:3279