contrail-query-engine crashed with split-db config on scaled setup

contrail version
3.1.3.0-75

Setup : with split db
VN: ~6k
Interface = ~ 12k

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/bin/contrail-query-engine --conf_file /etc/contrail/contrail-query-engine.'.
Program terminated with signal SIGABRT, Aborted.
#0 0x00007fad522bcc37 in raise () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0 0x00007fad522bcc37 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fad522c0028 in abort () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007fad522b5bf6 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#3 0x00007fad522b5ca2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6
#4 0x00000000004ec61b in FindMember (name=0x738125 "name", this=<optimized out>) at build/include/rapidjson/document.h:620
#5 rapidjson::GenericValue<rapidjson::UTF8<char>, rapidjson::MemoryPoolAllocator<rapidjson::CrtAllocator> >::operator[] (
    this=<optimized out>, name=0x738125 "name") at build/include/rapidjson/document.h:233
#6 0x00000000004da7a6 in operator[] (name=0x738125 "name", this=<optimized out>) at build/include/rapidjson/document.h:240
Python Exception <class 'IndexError'> list index out of range:
#7 PostProcessingQuery::PostProcessingQuery (this=0x2acfd30, json_api_data=std::map with 10 elements, main_query=0x2acd880)
    at controller/src/query_engine/query.cc:242
#8 0x00000000004e08e0 in AnalyticsQuery::Init (this=this@entry=0x2acd880, qid="af3b2a28-5769-11e7-9739-0000ac115a02",
Python Exception <class 'IndexError'> list index out of range:
    json_api_data=std::map with 10 elements, or_number=or_number@entry=-1) at controller/src/query_engine/query.cc:549
#9 0x00000000004e2fec in AnalyticsQuery::AnalyticsQuery (this=0x2acd880,
    qid="讥\002\000\000\000\000\060\000\000\000\000\000\000\000\000H\245\002\000\000\000\000\300ؤ\002\000\000\000\000x\023\345R\255\1 77\000\000\000\000\000\000\000\000\000\000\200Ω\002\000\000\000\000@ޭ\002\000\000\000\000 l\250\002\000\000\000\000\n\000\000\000\000\ 000\000\000\371\005\255\002\000\000\000\000\370\005\255\002\000\000\000\000:\006\255\002\000\000\000\000\370\a\255\002\000\000\000\00 0\340\235\346R\255\177\000\000\030\000\000\000\255\177\000\000\370\005\255\002\000\000\000\000P\357\344R\255\177\000\000\006", '\000' <repeats 15 times>, "\002\020\000\000\000\000\000\000\000\000\000\000\255\177", '\000' <repeats 26 times>..., dbif_ptr=...,
    json_api_data=std::map with 518 elements<error reading variable: Cannot access memory at address 0xfefefeff092d637c>,
Python Exception <class 'IndexError'> list index out of range:
    or_number=-1, where_info=<optimized out>, ttlmap=std::map with 4 elements, batch=0, total_batches=16)
    at controller/src/query_engine/query.cc:977
#10 0x00000000004eb334 in QueryEngine::QueryPrepare (this=0x2a526e0, qp=..., chunk_size=std::vector of length 0, capacity 0,
    need_merge=@0x7ffcfbd65840: true, map_output=@0x7ffcfbd6584a: true, where="", wterms=@0x7ffcfbd6584c: 1, select="", post="",
---Type <return> to continue, or q <return> to quit---
    time_period=@0x7ffcfbd65a40: 8118339, table="") at controller/src/query_engine/query.cc:1193
#11 0x000000000049f38c in QEOpServerProxy::QEOpServerImpl::StartPipeline (this=this@entry=0x2a4d200,
    qid="af3b2a28-5769-11e7-9739-0000ac115a02") at controller/src/query_engine/QEOpServerProxy.cc:833
#12 0x00000000004a1781 in QEOpServerProxy::QEOpServerImpl::CallbackProcess (this=0x2a4d200, cnum=<optimized out>,
    c=<optimized out>, r=<optimized out>, privdata=<optimized out>) at controller/src/query_engine/QEOpServerProxy.cc:998
#13 0x000000000055dfba in operator() (a2=0x0, a1=0x2a7c7e0, a0=0x2a52ec0, this=0x7ffcfbd66490)
    at /usr/include/boost/function/function_template.hpp:767
#14 RedisAsyncConnection::RAC_AsyncCmdCallback (c=0x2a52ec0, r=0x2a7c7e0, privdata=0x0)
    at controller/src/analytics/redis_connection.cc:239
#15 0x00000000006ffe43 in __redisRunCallback (cb=0x7ffcfbd665b0, cb=0x7ffcfbd665b0, reply=<optimized out>, ac=0x2a52ec0)
    at build/third_party/hiredis/src/async.c:219
#16 redisProcessCallbacks (ac=0x2a52ec0) at build/third_party/hiredis/src/async.c:417
#17 0x0000000000701269 in redisBoostClient::handle_read (this=0x2a5b020, ec=...)
    at build/third_party/hiredis/hiredis-boostasio-adapter/boostasio.cpp:62
#18 0x0000000000701c34 in call<boost::shared_ptr<redisBoostClient>, boost::system::error_code> (b1=<synthetic pointer>, u=...,
    this=<optimized out>) at /usr/include/boost/bind/mem_fn_template.hpp:156
#19 operator()<boost::shared_ptr<redisBoostClient> > (a1=..., u=..., this=<optimized out>)
    at /usr/include/boost/bind/mem_fn_template.hpp:171
#20 operator()<boost::_mfi::mf1<void, redisBoostClient, boost::system::error_code>, boost::_bi::list2<const boost::system::error_code &, long unsigned int const&> > (a=<synthetic pointer>, f=..., this=<optimized out>) at /usr/include/boost/bind/bind.hpp:313
#21 operator()<boost::system::error_code, long unsigned int> (a2=<optimized out>, a1=..., this=<optimized out>)
    at /usr/include/boost/bind/bind_template.hpp:102
#22 operator() (this=<optimized out>) at /usr/include/boost/asio/detail/bind_handler.hpp:127
---Type <return> to continue, or q <return> to quit---
#23 asio_handler_invoke<boost::asio::detail::binder2<boost::_bi::bind_t<void, boost::_mfi::mf1<void, redisBoostClient, boost::system: :error_code>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<redisBoostClient> >, boost::arg<1> (*)()> >, boost::system::error _code, unsigned long> > (function=...) at /usr/include/boost/asio/handler_invoke_hook.hpp:64
#24 invoke<boost::asio::detail::binder2<boost::_bi::bind_t<void, boost::_mfi::mf1<void, redisBoostClient, boost::system::error_code>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<redisBoostClient> >, boost::arg<1> (*)()> >, boost::system::error_code, unsign ed long>, boost::_bi::bind_t<void, boost::_mfi::mf1<void, redisBoostClient, boost::system::error_code>, boost::_bi::list2<boost::_bi: :value<boost::shared_ptr<redisBoostClient> >, boost::arg<1> (*)()> > > (context=..., function=...)
    at /usr/include/boost/asio/detail/handler_invoke_helpers.hpp:37

#25 boost::asio::detail::reactive_null_buffers_op<boost::_bi::bind_t<void, boost::_mfi::mf1<void, redisBoostClient, boost::system::er ror_code>, boost::_bi::list2<boost::_bi::value<boost::shared_ptr<redisBoostClient> >, boost::arg<1> (*)()> > >::do_complete (
    owner=<optimized out>, base=<optimized out>) at /usr/include/boost/asio/detail/reactive_null_buffers_op.hpp:75
#26 0x00000000005cafef in complete (bytes_transferred=0, ec=..., owner=..., this=<optimized out>)
    at /usr/include/boost/asio/detail/task_io_service_operation.hpp:37
#27 boost::asio::detail::epoll_reactor::descriptor_state::do_complete (owner=0x29de3d0, base=0x2a4e0b0, ec=...,
    bytes_transferred=<optimized out>) at /usr/include/boost/asio/detail/impl/epoll_reactor.ipp:651
#28 0x00000000005cc7d7 in complete (bytes_transferred=5, ec=..., owner=..., this=0x2a4e0b0)
    at /usr/include/boost/asio/detail/task_io_service_operation.hpp:37
#29 do_run_one (ec=..., this_thread=..., lock=..., this=0x29de3d0) at /usr/include/boost/asio/detail/impl/task_io_service.ipp:384
#30 boost::asio::detail::task_io_service::run (this=0x29de3d0, ec=...)
    at /usr/include/boost/asio/detail/impl/task_io_service.ipp:153
#31 0x00000000005dad81 in run (this=0x7ffcfbd66f20, ec=...) at /usr/include/boost/asio/impl/io_service.ipp:66
#32 EventManager::Run (this=this@entry=0x7ffcfbd66f20) at controller/src/io/event_manager.cc:35
#33 0x000000000041e8c9 in main (argc=<optimized out>, argv=<optimized out>) at controller/src/query_engine/qed.cc:350

core is stored in /auto/cores/#

host1 ='root@10.87.121.77'
host2 ='root@10.87.121.78'
host3 ='root@10.87.121.79'
host4 ='root@10.87.121.80'
host5 ='root@10.87.121.81'
host6 ='root@10.87.121.82'
host7 ='root@10.87.121.83'
host8 ='root@10.87.121.84'
host9 ='root@10.87.121.85'
host10 ='root@10.87.121.86'

host11 ='root@10.87.121.70'
host12 ='root@10.87.121.71'
host13 ='root@10.87.121.72'
host14 ='root@10.87.121.73'
host15 ='root@10.87.121.74'
host16 ='root@10.87.121.75'
host17 ='root@10.87.121.76'

env.roledefs = {
    'all': [host1,host2,host3,host4,host5,host6,host7,host8,host9,host10,host11,host12,host13,host14,host15,host16,host17],
    'cfgm': [host1,host4,host7],
    'openstack': [host10],
    'webui': [host1,host4,host7],
    'control': [host1,host4,host7],
    'compute': [host11,host12,host13,host14,host15,host16,host17],
    'tsn': [host11,host12,host13,host14],
    'toragent': [host11,host12,host13,host14],
    'collector': [host2,host5,host8],
    'database': [host3,host6,host9],
    'build': [host_build],
}