Details
Major - P3 Description
We have seen an automated test failure where it looks like we are freeing a ref that should not have been freed. We can't see a code path where that could happen, so have added additional diagnostic information to hopefully be able to root cause if it happens again.
test/format triggered a segfault while doing stress overflow testing, specifically, below line of execution:
eval $CMD file_type=row leaf_page_max=9 internal_page_max=9 key_min=256 value_min=256 || cleanup
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Jenkins run:
http://build.wiredtiger.com:8080/job/wiredtiger-test-format-stress-ppc/18538
Stack trace:
Backtrace:
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/lib64/libSegFault.so(+0x1734)[0x3fff883d1734]
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??:0(??)[0x3fff88400478]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/../src/include/cell.i:769(__cell_data_ref)[0x101593dc]
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??:0(??)[0x3fff541885e0]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/../src/include/cell.i:737(__wt_cell_unpack)[0x102071d4]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/../src/include/btree.i:1051(__wt_row_leaf_value_cell)[0x10208b3c]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/../src/include/cursor.i:468(__cursor_row_slot_return)[0x1020abd4]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/../src/btree/bt_curprev.c:523(__cursor_row_prev)[0x1020c200]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/../src/btree/bt_curprev.c:627(__wt_btcur_prev)[0x1020c724]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/../src/cursor/cur_file.c:147(__curfile_prev)[0x10188c74]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/test/format/../../../test/format/ops.c:1343 (discriminator 2)(nextprev)[0x1000edb8]
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/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-ppc/build_posix/test/format/../../../test/format/ops.c:1085(ops)[0x1000df6c]
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/lib64/power8/libpthread.so.0(+0x8944)[0x3fff88328944]
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/lib64/power8/libc.so.6(clone+0x98)[0x3fff881a7640]
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The configuration:
############################################
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# RUN PARAMETERS
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############################################
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abort=0
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alter=0
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auto_throttle=1
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backups=0
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bitcnt=2
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bloom=1
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bloom_bit_count=4
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bloom_hash_count=21
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bloom_oldest=1
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cache=68
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cache_minimum=20
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checkpoints=on
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checkpoint_log_size=155
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checkpoint_wait=52
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checksum=uncompressed
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chunk_size=1
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compaction=0
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compression=snappy
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data_extend=0
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data_source=table
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delete_pct=13
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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=5
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file_type=row-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=34
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internal_key_truncation=0
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internal_page_max=9
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isolation=random
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key_gap=1
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key_max=256
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key_min=256
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leaf_page_max=9
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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=44452
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logging_prealloc=1
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long_running_txn=0
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lsm_worker_threads=4
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merge_max=13
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mmap=0
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modify_pct=22
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ops=0
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prefix_compression=1
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prefix_compression_min=8
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prepare=0
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quiet=1
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read_pct=0
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rebalance=1
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repeat_data_pct=44
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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=75
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statistics=1
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statistics_server=0
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threads=9
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timer=4
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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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timing_stress_split_9=0
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transaction_timestamps=0
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transaction-frequency=19
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truncate=1
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value_max=2497
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value_min=256
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verify=1
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wiredtiger_config=
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write_pct=31
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############################################
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