Major - P3 Some combination of operations when using force_stop=true and then closing the backup cursor (or as in the stack below, closing the session) results in an assertion failure. I have not been able to reproduce this with our Python tests yet.
#0 0x00007fc94583f4f5 in raise () from /lib64/libc.so.6 #1 0x00007fc945840cd5 in abort () from /lib64/libc.so.6 #2 0x00007fc95ab74582 in __wt_abort (session=0x7fc939b325e0) at src/third_party/wiredtiger/src/os_common/os_abort.c:30 #3 0x00007fc95abbd3b1 in __txn_visible_id (session=0x7fc939b325e0, id=7) at src/third_party/wiredtiger/src/include/txn_inline.h:676 #4 0x00007fc95abbf429 in __wt_rec_upd_select (session=0x7fc939b325e0, r=0x7fc938196a20, ins=0x7fc93edd92c0, ripcip=0x0, vpack=0x0, upd_select=0x7fc91f47d070) at src/third_party/wiredtiger/src/reconcile/rec_visibility.c:313 #5 0x00007fc95abb41ac in __rec_row_leaf_insert (session=0x7fc939b325e0, r=0x7fc938196a20, ins=0x7fc93edd92c0) at src/third_party/wiredtiger/src/reconcile/rec_row.c:565 #6 0x00007fc95abb5395 in __wt_rec_row_leaf (session=0x7fc939b325e0, r=0x7fc938196a20, pageref=0x7fc93ecff9c0, salvage=0x0) at src/third_party/wiredtiger/src/reconcile/rec_row.c:742 #7 0x00007fc95abcadd0 in __reconcile (session=0x7fc939b325e0, ref=0x7fc93ecff9c0, salvage=0x0, flags=4, page_lockedp=0x7fc91f47d3a2) at src/third_party/wiredtiger/src/reconcile/rec_write.c:192 #8 0x00007fc95abca780 in __wt_reconcile (session=0x7fc939b325e0, ref=0x7fc93ecff9c0, salvage=0x0, flags=4) at src/third_party/wiredtiger/src/reconcile/rec_write.c:99 #9 0x00007fc95a9e67e9 in __wt_sync_file (session=0x7fc939b325e0, syncop=WT_SYNC_CHECKPOINT) at src/third_party/wiredtiger/src/btree/bt_sync.c:646 #10 0x00007fc95ac5a0d3 in __checkpoint_tree (session=0x7fc939b325e0, is_checkpoint=true, cfg=0x7fc91f47d650) at src/third_party/wiredtiger/src/txn/txn_ckpt.c:1672 #11 0x00007fc95ac5aa25 in __wt_checkpoint (session=0x7fc939b325e0, cfg=0x7fc91f47d650) at src/third_party/wiredtiger/src/txn/txn_ckpt.c:1832 #12 0x00007fc95aa5e248 in __curbackup_close (cursor=0x7fc937b70b60) at src/third_party/wiredtiger/src/cursor/cur_backup.c:214 #13 0x00007fc95abf63e6 in __session_close_cursors (session=0x7fc939b325e0, cursors=0x7fc939b32740) at src/third_party/wiredtiger/src/session/session_api.c:233 #14 0x00007fc95abf6f80 in __wt_session_close_internal (session=0x7fc939b325e0) at src/third_party/wiredtiger/src/session/session_api.c:306 #15 0x00007fc95abf6ae0 in __session_close (wt_session=0x7fc939b325e0, config=0x0) at src/third_party/wiredtiger/src/session/session_api.c:270
The checkpoint for force_stop to write out the turtle file was added in WT-6844 to solve a bug where there was a window where the stop of incremental backup was vulnerable and could reappear if a crash happened at the right time.