0x7f1dc320b010:cache clean check: no (7.466%)

0x7f1dc320b010:cache dirty check: no (2.422%)

#2  __wt_spin_backoff (yield_count=0x7f1daa7e16b0, sleep_usecs=0x7f1daa7e16a8)

    at ../src/include/misc.i:245

#3  __wt_page_in_func (session=0x7f1dc3215c58, ref=0x7f1d5081d2f0, flags=3746, 

    func=0x55aeac0a8310 <__func__.35452> "__tree_walk_internal", line=527) at ../src/btree/bt_read.c:864

#4  __wt_page_swap_func (session=0x7f1dc3215c58, held=0x0, want=0x7f1d5081d2f0, flags=3746, 

    func=0x55aeac0a8310 <__func__.35452> "__tree_walk_internal", line=527) at ../src/include/btree.i:1702

#5  __tree_walk_internal (session=0x7f1dc3215c58, refp=0x7f1d94146238, walkcntp=0x0, 

    skip_func=0x0, func_cookie=0x0, flags=2690) at ../src/btree/bt_walk.c:526

#6  __wt_tree_walk (session=0x7f1dc3215c58, refp=0x7f1d94146238, flags=2688)

    at ../src/btree/bt_walk.c:597

#7  __wt_btcur_prev (cbt=0x7f1d941460c0, truncating=false) at ../src/btree/bt_curprev.c:675

#8  __curfile_prev (cursor=0x7f1d941460c0) at ../src/cursor/cur_file.c:147

#9  read_op (cursor=0x7f1d941460c0, op=PREV, exactp=0x0) at ../../../test/format/ops.c:325

#10 nextprev (tinfo=0x55aeaed34f90, cursor=0x7f1d941460c0, next=false)

    at ../../../test/format/ops.c:1364

#11 ops (arg=0x55aeaed34f90) at ../../../test/format/ops.c:1107

#0  __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135

#1  0x00007f1dc2660023 in __GI___pthread_mutex_lock (mutex=0x7f1d482b76b8) at ../nptl/pthread_mutex_lock.c:78

#2  0x000055aeabfb5ca0 in __wt_spin_lock (session=0x7f1dc3212920, t=0x7f1d482b76b8) at ../src/include/mutex.i:173

#3  0x000055aeabfbc85e in __split_internal_lock (session=0x7f1dc3212920, ref=0x7f1d5081d2f0, trylock=false, 

    parentp=0x7f1dac7e7620) at ../src/btree/bt_split.c:1251

#4  0x000055aeabfbf21b in __split_reverse (session=0x7f1dc3212920, ref=0x7f1d5081d2f0) at ../src/btree/bt_split.c:2229

#5  0x000055aeabfbf313 in __wt_split_reverse (session=0x7f1dc3212920, ref=0x7f1d5081d2f0)

    at ../src/btree/bt_split.c:2251

#6  0x000055aeabeeb7bb in __evict_delete_ref (session=0x7f1dc3212920, ref=0x7f1d5081d2f0, closing=false)

    at ../src/evict/evict_page.c:284

#7  0x000055aeabeebbec in __evict_page_clean_update (session=0x7f1dc3212920, ref=0x7f1d5081d2f0, closing=false)

    at ../src/evict/evict_page.c:336

#8  0x000055aeabeeb34b in __wt_evict (session=0x7f1dc3212920, ref=0x7f1d5081d2f0, closing=false, previous_state=5)

    at ../src/evict/evict_page.c:219

#9  0x000055aeabeeacb2 in __wt_page_release_evict (session=0x7f1dc3212920, ref=0x7f1d5081d2f0)

    at ../src/evict/evict_page.c:92

#10 0x000055aeabf15d93 in __wt_page_release (session=0x7f1dc3212920, ref=0x7f1d5081d2f0, flags=136)

    at ../src/include/btree.i:1521

#11 0x000055aeabf19697 in __rec_child_modify (session=0x7f1dc3212920, r=0x7f1d6408d430, ref=0x7f1d5081d2f0, 

    hazardp=0x7f1dac7e7891, statep=0x7f1dac7e7894) at ../src/reconcile/rec_write.c:1922

#12 0x000055aeabf1fe17 in __rec_row_int (session=0x7f1dc3212920, r=0x7f1d6408d430, page=0x55aeb07b0400)

    at ../src/reconcile/rec_write.c:4854

#13 0x000055aeabf1674c in __wt_reconcile (session=0x7f1dc3212920, ref=0x55aeb0662db0, salvage=0x0, flags=1, 

    lookaside_retryp=0x0) at ../src/reconcile/rec_write.c:469

#14 0x000055aeabfc387d in __wt_sync_file (session=0x7f1dc3212920, syncop=WT_SYNC_CHECKPOINT)

    at ../src/btree/bt_sync.c:337

#15 0x000055aeabf69736 in __checkpoint_tree (session=0x7f1dc3212920, is_checkpoint=true, cfg=0x7f1dac7e7e20)

    at ../src/txn/txn_ckpt.c:1667

#16 0x000055aeabf69a78 in __checkpoint_tree_helper (session=0x7f1dc3212920, cfg=0x7f1dac7e7e20)

    at ../src/txn/txn_ckpt.c:1783

#17 0x000055aeabf65d44 in __checkpoint_apply (session=0x7f1dc3212920, cfg=0x7f1dac7e7e20, 

    op=0x55aeabf699ea <__checkpoint_tree_helper>) at ../src/txn/txn_ckpt.c:218

#18 0x000055aeabf67941 in __txn_checkpoint (session=0x7f1dc3212920, cfg=0x7f1dac7e7e20) at ../src/txn/txn_ckpt.c:909

#19 0x000055aeabf683ca in __txn_checkpoint_wrapper (session=0x7f1dc3212920, cfg=0x7f1dac7e7e20)

    at ../src/txn/txn_ckpt.c:1107

#20 0x000055aeabf68546 in __wt_txn_checkpoint (session=0x7f1dc3212920, cfg=0x7f1dac7e7e20, waiting=true)

    at ../src/txn/txn_ckpt.c:1171

#21 0x000055aeabf43f77 in __session_checkpoint (wt_session=0x7f1dc3212920, config=0x0)

    at ../src/session/session_api.c:1984

#22 0x000055aeabeb1821 in checkpoint (arg=0x0) at ../../../test/format/util.c:571

#23 0x00007f1dc265d6db in start_thread (arg=0x7f1dac7e8700) at pthread_create.c:463

        /*                                                                      

         * A checkpoint reconciling this parent page can deadlock with          

         * our split. We have an exclusive page lock on the child before        

         * we acquire the page's reconciliation lock, and reconciliation        

         * acquires the page's reconciliation lock before it encounters         

         * the child's exclusive lock (which causes reconciliation to           

         * loop until the exclusive lock is resolved). If we want to split      

         * the parent, give up to avoid that deadlock.                          

         */