Thread 4 (Thread 0x7f14869dc700 (LWP 13351)):
#0  0x00007f1487769f97 in sched_yield () from /lib64/libc.so.6
#1  0x00000000004448a3 in __wt_yield () at ../src/os_posix/os_yield.c:18
#2  0x000000000046d57f in __wt_session_lock_dhandle (session=0xad98e0, flags=24, is_deadp=0x7f14869dba3f) at ../src/session/session_dhandle.c:218
#3  0x000000000046de9f in __wt_session_get_btree (session=0xad98e0, uri=0x7f13f0017620 "file:wt-000110.lsm", checkpoint=0x7f141827cd50 "WiredTigerCheckpoint.2", cfg=0x0,
    flags=24) at ../src/session/session_dhandle.c:465
#4  0x000000000046e450 in __wt_session_lock_checkpoint (session=0xad98e0, checkpoint=0x7f141827cd50 "WiredTigerCheckpoint.2") at ../src/session/session_dhandle.c:547
#5  0x000000000047de26 in __checkpoint_worker (session=0xad98e0, cfg=0x0, is_checkpoint=false, need_tracking=false) at ../src/txn/txn_ckpt.c:988
#6  0x000000000047e6b2 in __wt_checkpoint_close (session=0xad98e0, final=false) at ../src/txn/txn_ckpt.c:1271
#7  0x00000000004c418b in __wt_conn_btree_sync_and_close (session=0xad98e0, final=false, force=false) at ../src/conn/conn_dhandle.c:199
#8  0x00000000004c4fc8 in __wt_conn_dhandle_close_all (session=0xad98e0, uri=0x7f13f00082d0 "file:wt-000110.lsm", force=false) at ../src/conn/conn_dhandle.c:570
#9  0x000000000045dd5e in __drop_file (session=0xad98e0, uri=0x7f13f00082d0 "file:wt-000110.lsm", force=false, cfg=0x7f14869dbdd0) at ../src/schema/schema_drop.c:32
#10 0x000000000045e3c1 in __wt_schema_drop (session=0xad98e0, uri=0x7f13f00082d0 "file:wt-000110.lsm", cfg=0x7f14869dbdd0) at ../src/schema/schema_drop.c:180
#11 0x00000000004ee3c1 in __lsm_drop_file (session=0xad98e0, uri=0x7f13f00082d0 "file:wt-000110.lsm") at ../src/lsm/lsm_work_unit.c:517
#12 0x00000000004ee644 in __wt_lsm_free_chunks (session=0xad98e0, lsm_tree=0xb58e10) at ../src/lsm/lsm_work_unit.c:608
#13 0x000000000043c168 in __lsm_worker_general_op (session=0xad98e0, cookie=0xad3ba0, completed=0x7f14869dbee6) at ../src/lsm/lsm_worker.c:72
---Type <return> to continue, or q <return> to quit---
#14 0x000000000043c285 in __lsm_worker (arg=0xad3ba0) at ../src/lsm/lsm_worker.c:122
#15 0x00007f1488077555 in start_thread () from /lib64/libpthread.so.0
#16 0x00007f1487785f3d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f14851d9700 (LWP 13357)):
#0  0x00007f148807f29d in __lll_lock_wait () from /lib64/libpthread.so.0
#1  0x00007f148807988d in pthread_mutex_lock () from /lib64/libpthread.so.0
#2  0x000000000046ce16 in __wt_spin_lock (session=0xad8fe0, t=0xac6600) at ../src/include/mutex.i:159
#3  0x000000000046dd44 in __session_get_dhandle (session=0xad8fe0, uri=0x51e9c8 "file:WiredTiger.wt", checkpoint=0x0) at ../src/session/session_dhandle.c:431
#4  0x000000000046de49 in __wt_session_get_btree (session=0xad8fe0, uri=0x51e9c8 "file:WiredTiger.wt", checkpoint=0x0, cfg=0x0, flags=0)
    at ../src/session/session_dhandle.c:454
#5  0x000000000043c858 in __wt_metadata_open (session=0xad8fe0) at ../src/meta/meta_table.c:45
#6  0x000000000046c016 in __wt_open_session (conn=0xac61c0, event_handler=0x0, config=0x518c42 "isolation=snapshot", open_metadata=true, sessionp=0x7f14851d8d80)
    at ../src/session/session_api.c:1305
#7  0x00000000004107e2 in __conn_open_session (wt_conn=0xac61c0, event_handler=0x0, config=0x518c42 "isolation=snapshot", wt_sessionp=0x7f14851d8e90)
    at ../src/conn/conn_api.c:1091
#8  0x0000000000406517 in ops (arg=0xad4a00) at ../../../test/format/ops.c:286
#9  0x00007f1488077555 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f1487785f3d in clone () from /lib64/libc.so.6

############################################
#  RUN PARAMETERS
############################################
abort=0
auto_throttle=1
firstfit=0
bitcnt=2
bloom=1
bloom_bit_count=60
bloom_hash_count=7
bloom_oldest=0
cache=180
checkpoints=1
checksum=uncompressed
chunk_size=6
compaction=0
compression=none
data_extend=0
data_source=lsm
delete_pct=29
dictionary=0
encryption=rotn-7
evict_max=0
file_type=row-store
backups=0
huffman_key=0
huffman_value=0
insert_pct=54
internal_key_truncation=1
internal_page_max=9
isolation=snapshot
key_gap=6
key_max=50
key_min=30
leak_memory=0
leaf_page_max=15
logging=0
logging_compression=none
logging_archive=0
logging_prealloc=0
long_running_txn=0
lsm_worker_threads=4
merge_max=7
mmap=1
ops=716676
prefix_compression=0
prefix_compression_min=1
repeat_data_pct=35
reverse=0
rows=771677
runs=0
salvage=1
split_pct=62
statistics=1
statistics_server=0
threads=1
timer=20
value_max=2592
value_min=17
verify=1
wiredtiger_config=
write_pct=39
############################################