(gdb) bt full
#0  hash (__seed=3339675911, __clength=<optimized out>, __ptr=<optimized out>) at /usr/local/include/c++/7.3.0/bits/functional_hash.h:192
No locals.
#1  operator() (this=0x7f64ac5f0670, __s=...) at /usr/local/include/c++/7.3.0/bits/basic_string.h:6591
No locals.
#2  _M_hash_code (this=0x7f64ac5f0670, __k=...) at /usr/local/include/c++/7.3.0/bits/hashtable_policy.h:1368
No locals.
#3  std::_Hashtable<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, DurabilityMonitor::Position<std::__cxx11::list<DurabilityMonitor::ActiveSyncWrite, std::allocator<DurabilityMonitor::ActiveSyncWrite> > > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, DurabilityMonitor::Position<std::__cxx11::list<DurabilityMonitor::ActiveSyncWrite, std::allocator<DurabilityMonitor::ActiveSyncWrite> > > > >, std::__detail::_Select1st, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >::find (this=0x7f64ac5f0670, __k=...)
    at /usr/local/include/c++/7.3.0/bits/hashtable.h:1436
        __code = <optimized out>
        __n = <optimized out>
#4  0x00007f650df5ff80 in find (__x=..., this=<optimized out>) at /usr/local/include/c++/7.3.0/bits/unordered_map.h:927
No locals.
#5  hasAcked (bySeqno=13298, node=..., this=<optimized out>)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/durability_monitor_impl.cc:352
        itr = <optimized out>
#6  operator<< (os=..., sw=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/durability_monitor_impl.cc:266
        __for_range = <optimized out>
        acks = {static npos = 18446744073709551615, 
          _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
            _M_p = 0x7f64f6fe3380 ""}, _M_string_length = 0, {_M_local_buf = "\000\071\071\000\000\000\000\000\320\064\376\366d\177\000", 
            _M_allocated_capacity = 3750144}}
#7  0x00007f650df591e0 in operator<< (os=..., s=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/durability_monitor_impl.h:745
        __for_range = @0x7f648f670980: <error reading variable>
#8  0x00007f650df53fb7 in ActiveDurabilityMonitor::toOStream (this=0x7f648f6e5dc0, os=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/active_durability_monitor.cc:1082
No locals.
#9  0x00007f650df5daa0 in operator<< (os=..., dm=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/durability_monitor.cc:21
No locals.
#10 0x00007f650df63ca9 in PassiveDurabilityMonitor::PassiveDurabilityMonitor(VBucket&, ActiveDurabilityMonitor&&) (this=0x7f64863f70e0, vb=..., 
    adm=<unknown type in /usr/lib/debug/opt/couchbase/lib/libep.so.debug, CU 0x117d72f, DIE 0x11fa143>)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/durability/passive_durability_monitor.cc:91
        ss = 
---Type <return> to continue, or q <return> to quit---
    {<std::basic_iostream<char, std::char_traits<char> >> = {<std::basic_istream<char, std::char_traits<char> >> = {<std::basic_ios<char, std::char_traits<char> >> = {<std::ios_base> = {
                  _vptr.ios_base = 0x8184b8 <vtable for std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >+24>, 
                  static boolalpha = std::_S_boolalpha, static dec = std::_S_dec, static fixed = std::_S_fixed, static hex = std::_S_hex, 
                  static internal = std::_S_internal, static left = std::_S_left, static oct = std::_S_oct, static right = std::_S_right, 
                  static scientific = std::_S_scientific, static showbase = std::_S_showbase, static showpoint = std::_S_showpoint, 
                  static showpos = std::_S_showpos, static skipws = std::_S_skipws, static unitbuf = std::_S_unitbuf, 
                  static uppercase = std::_S_uppercase, static adjustfield = std::_S_adjustfield, static basefield = std::_S_basefield, 
                  static floatfield = std::_S_floatfield, static badbit = std::_S_badbit, static eofbit = std::_S_eofbit, 
                  static failbit = std::_S_failbit, static goodbit = std::_S_goodbit, static app = std::_S_app, static ate = std::_S_ate, 
                  static binary = std::_S_bin, static in = std::_S_in, static out = std::_S_out, static trunc = std::_S_trunc, 
                  static beg = std::_S_beg, static cur = std::_S_cur, static end = std::_S_end, _M_precision = 0, _M_width = 8488160, 
                  _M_flags = 8490264, _M_exception = std::_S_goodbit, _M_streambuf_state = -1879878400, _M_callbacks = 0x7f648ff35500, _M_word_zero = {
                    _M_pword = 0x7f648ff35510, _M_iword = 140069888546048}, _M_local_word = {{_M_pword = 0x7f648ff3567f, _M_iword = 140069888546560}, {
                      _M_pword = 0x7f650aaac720 <(anonymous namespace)::c_locale_impl>, _M_iword = 3473183930213990424}, {_M_pword = 0x7f648ff35500, 
                      _M_iword = 16}, {_M_pword = 0x200, _M_iword = 7238526415436669298}, {
                      _M_pword = 0x818508 <vtable for std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >+104>, 
                      _M_iword = 6}, {_M_pword = 0x0, _M_iword = 4098}, {_M_pword = 0x0, _M_iword = 0}, {_M_pword = 0x0, _M_iword = 0}}, 
                  _M_word_size = 0, _M_word = 0x0, _M_ios_locale = {static none = 0, static ctype = 1, static numeric = 2, static collate = 4, 
                    static time = 8, static monetary = 16, static messages = 32, static all = 63, _M_impl = 0x0, static _S_classic = 0x0, 
                    static _S_global = 0x0, static _S_categories = 0x372fc0, static _S_once = 0, static _S_twinned_facets = 
    0x7f650aaa0760 <std::locale::_S_twinned_facets>}}, _M_tie = 0x0, _M_fill = 0 '\000', _M_fill_init = false, _M_streambuf = 0x0, _M_ctype = 0x0, 
                _M_num_put = 0x0, _M_num_get = 0x0}, 
              _vptr.basic_istream = 0x8184b8 <vtable for std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >+24>, 
              _M_gcount = 0}, <std::basic_ostream<char, std::char_traits<char> >> = {
              _vptr.basic_ostream = 0x8184e0 <vtable for std::__cxx11::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >+64>}, <No data fields>}, _M_stringbuf = {<std::basic_streambuf<char, std::char_traits<char> >> = {
              _vptr.basic_streambuf = 0x818d18 <vtable for std::__cxx11::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >+16>, 
              _M_in_beg = 0x7f648ff35500 <Address 0x7f648ff35500 out of bounds>, _M_in_cur = 0x7f648ff35500 <Address 0x7f648ff35500 out of bounds>, 
              _M_in_end = 0x7f648ff35510 <Address 0x7f648ff35510 out of bounds>, _M_out_beg = 0x7f648ff35500 <Address 0x7f648ff35500 out of bounds>, 
              _M_out_cur = 0x7f648ff3567f <Address 0x7f648ff3567f out of bounds>, _M_out_end = 0x7f648ff35700 <Address 0x7f648ff35700 out of bounds>, 
              _M_buf_locale = {static none = 0, static ctype = 1, static numeric = 2, static collate = 4, static time = 8, static monetary = 16, 
                static messages = 32, static all = 63, _M_impl = 0x7f650aaac720 <(anonymous namespace)::c_locale_impl>, static _S_classic = 0x0, 
                static _S_global = 0x0, static _S_categories = 0x372fc0, static _S_once = 0, 
                static _S_twinned_facets = 0x7f650aaa0760 <std::locale::_S_twinned_facets>}}, _M_mode = 24, _M_string = {
              static npos = 18446744073709551615, 
              _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, 
                _M_p = 0x7f648ff35500 <Address 0x7f648ff35500 out of bounds>}, _M_string_length = 16, {
                _M_local_buf = "\000\002\000\000\000\000\000\000rabilitd", _M_allocated_capacity = 512}}}}
        s = <optimized out>
        highPreparedSeqno = <optimized out>
---Type <return> to continue, or q <return> to quit---
        highCompletedSeqno = <optimized out>
        admState = <optimized out>
#11 0x00007f650e0308df in make_unique<PassiveDurabilityMonitor, VBucket&, ActiveDurabilityMonitor> ()
    at /usr/local/include/c++/7.3.0/bits/unique_ptr.h:825
No locals.
#12 VBucket::setupSyncReplication (this=this@entry=0x7f648f5a0c00, topology=topology@entry=0x0)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/vbucket.cc:649
        currentPassiveDM = <optimized out>
        trackedWrites = {<std::_Vector_base<SingleThreadedRCPtr<Item, Item*, std::default_delete<Item> >, std::allocator<SingleThreadedRCPtr<Item, Item*, std::default_delete<Item> > > >> = {
            _M_impl = {<std::allocator<SingleThreadedRCPtr<Item, Item*, std::default_delete<Item> > >> = {<__gnu_cxx::new_allocator<SingleThreadedRCPtr<Item, Item*, std::default_delete<Item> > >> = {<No data fields>}, <No data fields>}, _M_start = 0x7f64500df680, _M_finish = 0x7f64500df6e0, 
              _M_end_of_storage = 0x7f64500df700}}, <No data fields>}
#13 0x00007f650e032fc3 in VBucket::setState_UNLOCKED (this=0x7f648f5a0c00, to=to@entry=vbucket_state_replica, meta=meta@entry=0x0, vbStateLock=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/vbucket.cc:551
No locals.
#14 0x00007f650e040674 in VBucketMap::setState_UNLOCKED (this=this@entry=0x7f64f171d018, vb=..., newState=newState@entry=vbucket_state_replica, 
    meta=meta@entry=0x0, vbStateLock=...) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/vbucketmap.cc:195
No locals.
#15 0x00007f650dff0d8e in KVBucket::setVBucketState_UNLOCKED (this=this@entry=0x7f64f171d000, vb=..., to=to@entry=vbucket_state_replica, 
    meta=meta@entry=0x0, transfer=<optimized out>, notify_dcp=notify_dcp@entry=true, vbset=..., vbStateLock=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:909
        oldstate = <optimized out>
#16 0x00007f650dff1444 in KVBucket::setVBucketState (this=0x7f64f171d000, vbid=..., to=vbucket_state_replica, meta=0x0, transfer=<optimized out>, 
    cookie=<optimized out>) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/kv_bucket.cc:865
        vbStateLock = {lock_ = 0x7f648f5a0df8}
        lh = {_M_device = 0x7f64f171d130, _M_owns = true}
        vb = {<std::__shared_ptr<VBucket, (__gnu_cxx::_Lock_policy)2>> = {<std::__shared_ptr_access<VBucket, (__gnu_cxx::_Lock_policy)2, false, false>> = {<No data fields>}, _M_ptr = 0x7f648f5a0c00, _M_refcount = {_M_pi = 0x7f648f68f2a0}}, <No data fields>}
#17 0x00007f650df82bc4 in EventuallyPersistentEngine::setVBucket (this=0x7f64f167f000, cookie=..., vbid=..., cas=<optimized out>, 
    state=vbucket_state_replica, meta=0x0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/engines/ep/src/ep_engine.cc:6578
No locals.
#18 0x0000000000450b61 in bucket_set_vbucket (cookie=..., state=vbucket_state_replica, meta=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/engine_wrapper.cc:947
        req = @0x7f64c8758830: <error reading variable>
        ret = <optimized out>
#19 0x00000000004d6d07 in SetVbucketCommandContext::sessionLockedStep (this=0x7f65089f7bb0)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/session_validated_command_context.cc:150
        this = 0x7f65089f7bb0
#20 0x00000000004d6ac8 in SessionValidatedCommandContext::step (this=0x7f65089f7bb0)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/session_validated_command_context.cc:40
---Type <return> to continue, or q <return> to quit---
        ret = <optimized out>
        this = 0x7f65089f7bb0
#21 0x00000000004dc4a0 in SteppableCommandContext::drive (this=this@entry=0x7f65089f7bb0)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/protocol/mcbp/steppable_command_context.cc:42
        ret = cb::success
#22 0x00000000004b0766 in set_vbucket_executor (cookie=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:566
No locals.
#23 0x00000000004b4436 in operator() (__args#0=..., this=<optimized out>) at /usr/local/include/c++/7.3.0/bits/std_function.h:706
No locals.
#24 execute_client_request_packet (cookie=..., request=...)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/mcbp_executors.cc:920
        privilegeChains = {commandChains = {_M_elems = {{
                chain = {<std::_Vector_base<Function<cb::rbac::PrivilegeAccess, cb::rbac::PrivilegeAccess::getSuccessValue, Cookie&>, std::allocator<Function<cb::rbac::PrivilegeAccess, cb::rbac::PrivilegeAccess::getSuccessValue, Cookie&> > >> = {
                    _M_impl = {<std::allocator<Function<cb::rbac::PrivilegeAccess, cb::rbac::PrivilegeAccess::getSuccessValue, Cookie&> >> = {<__gnu_cxx::new_allocator<Function<cb::rbac::PrivilegeAccess, cb::rbac::PrivilegeAccess::getSuccessValue, Cookie&> >> = {<No data fields>}, <No data fields>}, 
                      _M_start = 0x0, _M_finish = 0x0, _M_end_of_storage = 0x0}}, <No data fields>}} <repeats 256 times>}}}
        res = {status = cb::rbac::PrivilegeAccess::Ok}
#25 0x00000000004a24d9 in Cookie::execute (this=this@entry=0x7f6508930b80)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/cookie.cc:158
        header = @0x7f64c8758830: <error reading variable>
#26 0x00000000004838ad in Connection::executeCommandPipeline (this=this@entry=0x7f6508974900)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:561
        status = <optimized out>
        input = 0x7f6508860360
        stop = false
        maxActiveCommands = 32
        active = false
#27 0x000000000048a8d5 in Connection::executeCommandsCallback (this=this@entry=0x7f6508974900)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:687
        start = <optimized out>
        stop = <optimized out>
        ns = <optimized out>
#28 0x000000000048b78f in Connection::rw_callback (ctx=0x7f6508974900)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/connection.cc:816
        instance = @0x7f6508974900: <error reading variable>
        phosphor_internal_category_enabled_776 = {_M_b = {_M_p = 0x0}, 
          static is_always_lock_free = <error reading variable: No global symbol "std::atomic<std::atomic<phosphor::CategoryStatus> const*>::is_always_lock_free".>}
        phosphor_internal_category_enabled_temp_776 = <optimized out>
---Type <return> to continue, or q <return> to quit---
        phosphor_internal_tpi_wait_776 = {category = 0x59bb98 "mutex", name = 0x59fb00 "Connection::rw_callback::threadLock.wait", 
          type = phosphor::Complete, argument_names = {_M_elems = {0x59bfb8 "this", 0x5b4653 ""}}, argument_types = {_M_elems = {phosphor::is_pointer, 
              phosphor::is_none}}}
        phosphor_internal_tpi_held_776 = {category = 0x59bb98 "mutex", name = 0x59fad0 "Connection::rw_callback::threadLock.held", 
          type = phosphor::Complete, argument_names = {_M_elems = {0x5b4653 "", 0x5b4653 ""}}, argument_types = {_M_elems = {phosphor::is_pointer, 
              phosphor::is_none}}}
        phosphor_internal_guard_776 = {tpiWait = 0x5a0000 <Connection::rw_callback(bufferevent*, void*)::phosphor_internal_tpi_wait_776>, 
          tpiHeld = 0x59ffc0 <Connection::rw_callback(bufferevent*, void*)::phosphor_internal_tpi_held_776>, enabled = true, mutex = @0x7f65088b35e8, 
          threshold = {__r = 10000000}, start = {__d = {__r = 64422032058001}}, lockedAt = {__d = {__r = 64422032059318}}, releasedAt = {__d = {
              __r = 0}}}
#29 0x00007f650b886d8e in bufferevent_run_deferred_callbacks_unlocked (cb=<optimized out>, arg=0x7f6508930680)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/bufferevent.c:208
        readcb = 0x48b560 <Connection::rw_callback(bufferevent*, void*)>
        cbarg = 0x7f6508974900
        bufev_private = 0x7f6508930680
        bufev = 0x7f6508930680
#30 0x00007f650b88fd01 in event_process_active_single_queue (base=base@entry=0x7f650962a900, max_to_process=max_to_process@entry=2147483647, 
    endtime=endtime@entry=0x0, activeq=<optimized out>)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1726
        evcb_cbfinalize = <optimized out>
        ev = 0x0
        evcb = 0x7f6508930820
        count = 2
#31 0x00007f650b89054f in event_process_active (base=0x7f650962a900)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:1789
        activeq = <optimized out>
        i = 0
        c = 0
        tv = {tv_sec = 0, tv_usec = 140071936227055}
        maxcb = 2147483647
        endtime = 0x0
        limit_after_prio = 2147483647
#32 event_base_loop (base=0x7f650962a900, flags=flags@entry=0)
    at /home/couchbase/jenkins/workspace/cbdeps-platform-build-old/deps/packages/build/libevent/libevent-prefix/src/libevent/event.c:2012
        evsel = 0x7f650baa3c20 <epollops>
        tv = {tv_sec = 0, tv_usec = 0}
        tv_p = <optimized out>
        res = <optimized out>
        done = 0
        retval = 0
        __func__ = "event_base_loop"
---Type <return> to continue, or q <return> to quit---
#33 0x000000000046bba9 in worker_libevent (arg=0x7f65088b3550)
    at /home/couchbase/jenkins/workspace/couchbase-server-unix/kv_engine/daemon/thread.cc:195
        me = @0x7f65088b3550: <error reading variable>
#34 0x00007f650c7c6727 in run (this=0x7f65088547f0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:58
No locals.
#35 platform_thread_wrap (arg=0x7f65088547f0) at /home/couchbase/jenkins/workspace/couchbase-server-unix/platform/src/cb_pthreads.cc:71
        context = {_M_t = {
            _M_t = {<std::_Tuple_impl<0, CouchbaseThread*, std::default_delete<CouchbaseThread> >> = {<std::_Tuple_impl<1, std::default_delete<CouchbaseThread> >> = {<std::_Head_base<1, std::default_delete<CouchbaseThread>, true>> = {<std::default_delete<CouchbaseThread>> = {<No data fields>}, <No data fields>}, <No data fields>}, <std::_Head_base<0, CouchbaseThread*, false>> = {_M_head_impl = 0x7f65088547f0}, <No data fields>}, <No data fields>}}}
#36 0x00007f6509ffee25 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#37 0x00007f6509d2c34d in clone () from /lib64/libc.so.6
No symbol table info available.
(gdb) 
(gdb)