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
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snapshot-isolation 789234 search mismatch
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expected {0000789234/LMNOPQRSTUV}
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found {deleted}
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snapshot-isolation error: Dumping page to RUNDIR/pagedump
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Segmentation fault (core dumped)
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*** Segmentation fault
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(...)
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Backtrace:
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/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/../src/btree/bt_debug.c:805(__debug_page_metadata)[0x41953c]
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/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/../src/btree/bt_debug.c:758 (discriminator 3)(__debug_page)[0x4192e3]
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/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/../src/btree/bt_debug.c:678(__wt_debug_page)[0x419085]
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/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/../src/btree/bt_debug.c:698(__wt_debug_cursor_page)[0x41912a]
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/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/test/format/../../../test/format/snap.c:241(snap_verify)[0x40e103]
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/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/test/format/../../../test/format/snap.c:407(snap_repeat_txn)[0x40e5ce]
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/mnt/data0/jenkins/workspace/wiredtiger-test-format-stress/build_posix/test/format/../../../test/format/ops.c:946(ops)[0x409af2]
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/lib/x86_64-linux-gnu/libpthread.so.0(+0x76db)[0x7f86a8d096db]
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/lib/x86_64-linux-gnu/libc.so.6(clone+0x3f)[0x7f86a83f188f]
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The configuration:Â
############################################
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# RUN PARAMETERS
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############################################
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abort=0
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alter=1
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assert_commit_timestamp=0
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assert_read_timestamp=0
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auto_throttle=1
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backups=0
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bitcnt=4
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bloom=1
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bloom_bit_count=46
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bloom_hash_count=22
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bloom_oldest=0
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cache=94
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cache_minimum=20
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checkpoints=on
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checkpoint_log_size=144
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checkpoint_wait=42
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checksum=uncompressed
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chunk_size=7
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compaction=0
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compression=zlib
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data_extend=0
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data_source=table
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delete_pct=8
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dictionary=0
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direct_io=0
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encryption=rotn-7
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evict_max=4
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file_type=variable-length column-store
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firstfit=0
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huffman_key=0
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huffman_value=0
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independent_thread_rng=1
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in_memory=0
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insert_pct=38
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internal_key_truncation=1
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internal_page_max=13
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isolation=snapshot
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key_gap=20
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key_max=65
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key_min=20
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leaf_page_max=16
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leak_memory=0
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logging=0
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logging_archive=1
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logging_compression=none
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logging_file_max=499130
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logging_prealloc=0
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long_running_txn=0
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lsm_worker_threads=4
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memory_page_max=3
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merge_max=13
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mmap=1
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modify_pct=8
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ops=0
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prefix_compression=1
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prefix_compression_min=7
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prepare=1
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quiet=1
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random_cursor=0
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read_pct=35
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rebalance=1
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repeat_data_pct=83
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reverse=0
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rows=1000000
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runs=1
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salvage=1
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split_pct=60
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statistics=0
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statistics_server=0
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threads=15
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timer=4
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timing_stress_aggressive_sweep=0
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timing_stress_checkpoint=0
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timing_stress_lookaside_sweep=0
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timing_stress_split_1=0
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timing_stress_split_2=0
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timing_stress_split_3=0
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timing_stress_split_4=0
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timing_stress_split_5=0
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timing_stress_split_6=0
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timing_stress_split_7=0
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timing_stress_split_8=0
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transaction_timestamps=1
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transaction-frequency=100
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truncate=1
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value_max=443
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value_min=9
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verify=1
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wiredtiger_config=
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write_pct=11
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############################################
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Attachments
Issue Links
- is caused by
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WT-4961 Checkpoints with cache overflow must keep history for reads
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- Closed
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