Details
Description
Summary:
If the oldest (or only), skipped updates on a page being reconciled with lookaside writes are prepared, the WT_PAGE_LOOKASID.min_skipped_ts field is never set, leading to the wrong value being returned because lookaside records for the page will be incorrectly skipped.
This is another snapshot-isolation search mismatch failure, post the recent merging of WT-5169. This time the mismatch was about the expected content being found deleted. And the page dump segfaulted which is kind of expected as there's no lock applied while attempting to access the page.
http://build.wiredtiger.com:8080/job/wiredtiger-test-format-stress/72142/
++ nice catchsegv ./t -1 -c ../../../test/format/CONFIG.stress
|
snapshot-isolation 789234 search mismatch
|
expected {0000789234/LMNOPQRSTUV}
|
found {deleted}
|
snapshot-isolation error: Dumping page to RUNDIR/pagedump
|
Segmentation fault (core dumped)
|
*** Segmentation fault
|
|
|
(...)
|
|
|
Backtrace:
|
/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/../src/btree/bt_debug.c:805(__debug_page_metadata)[0x41953c]
|
/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/../src/btree/bt_debug.c:758 (discriminator 3)(__debug_page)[0x4192e3]
|
/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/../src/btree/bt_debug.c:678(__wt_debug_page)[0x419085]
|
/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/../src/btree/bt_debug.c:698(__wt_debug_cursor_page)[0x41912a]
|
/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/test/format/../../../test/format/snap.c:241(snap_verify)[0x40e103]
|
/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/test/format/../../../test/format/snap.c:407(snap_repeat_txn)[0x40e5ce]
|
/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/test/format/../../../test/format/ops.c:946(ops)[0x409af2]
|
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76db)[0x7f86a8d096db]
|
/lib/x86_64-linux-gnu/libc.so.6(clone+0x3f)[0x7f86a83f188f]
|
The configuration:
############################################
|
# RUN PARAMETERS
|
############################################
|
abort=0
|
alter=1
|
assert_commit_timestamp=0
|
assert_read_timestamp=0
|
auto_throttle=1
|
backups=0
|
bitcnt=4
|
bloom=1
|
bloom_bit_count=46
|
bloom_hash_count=22
|
bloom_oldest=0
|
cache=94
|
cache_minimum=20
|
checkpoints=on
|
checkpoint_log_size=144
|
checkpoint_wait=42
|
checksum=uncompressed
|
chunk_size=7
|
compaction=0
|
compression=zlib
|
data_extend=0
|
data_source=table
|
delete_pct=8
|
dictionary=0
|
direct_io=0
|
encryption=rotn-7
|
evict_max=4
|
file_type=variable-length column-store
|
firstfit=0
|
huffman_key=0
|
huffman_value=0
|
independent_thread_rng=1
|
in_memory=0
|
insert_pct=38
|
internal_key_truncation=1
|
internal_page_max=13
|
isolation=snapshot
|
key_gap=20
|
key_max=65
|
key_min=20
|
leaf_page_max=16
|
leak_memory=0
|
logging=0
|
logging_archive=1
|
logging_compression=none
|
logging_file_max=499130
|
logging_prealloc=0
|
long_running_txn=0
|
lsm_worker_threads=4
|
memory_page_max=3
|
merge_max=13
|
mmap=1
|
modify_pct=8
|
ops=0
|
prefix_compression=1
|
prefix_compression_min=7
|
prepare=1
|
quiet=1
|
random_cursor=0
|
read_pct=35
|
rebalance=1
|
repeat_data_pct=83
|
reverse=0
|
rows=1000000
|
runs=1
|
salvage=1
|
split_pct=60
|
statistics=0
|
statistics_server=0
|
threads=15
|
timer=4
|
timing_stress_aggressive_sweep=0
|
timing_stress_checkpoint=0
|
timing_stress_lookaside_sweep=0
|
timing_stress_split_1=0
|
timing_stress_split_2=0
|
timing_stress_split_3=0
|
timing_stress_split_4=0
|
timing_stress_split_5=0
|
timing_stress_split_6=0
|
timing_stress_split_7=0
|
timing_stress_split_8=0
|
transaction_timestamps=1
|
transaction-frequency=100
|
truncate=1
|
value_max=443
|
value_min=9
|
verify=1
|
wiredtiger_config=
|
write_pct=11
|
############################################
|
Attachments
Issue Links
- is caused by
-
WT-4961 Checkpoints with cache overflow must keep history for reads
-
- Closed
-