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  1. WiredTiger
  2. WT-835

stress test segfault in malloc

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    • Type: Task
    • Status: Closed
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: None
    • Labels:

      Description

      http://mjc.homeunix.org:8180/job/wiredtiger-test-format-stress/3207/console

      Presumably we wrote to some freed memory or overran a buffer. This could be related to WT-782, but we don't know yet.

      (gdb) where
      #0  0x0000003788a78c33 in _int_malloc () from /lib64/libc.so.6
      WT-1  0x0000003788a79fff in _int_memalign () from /lib64/libc.so.6
      WT-2  0x0000003788a7a702 in memalign () from /lib64/libc.so.6
      WT-3  0x0000003788a7a919 in posix_memalign () from /lib64/libc.so.6
      WT-4  0x000000000042b39d in __wt_realloc_aligned (session=0x18a6f60,
          bytes_allocated_ret=0x7fc17cdf99f0, bytes_to_allocate=512,
          retp=0x7fc17cdf99e8) at ../src/os_posix/os_alloc.c:139
      WT-5  0x0000000000444533 in __wt_buf_grow (session=0x18a6f60,
          buf=0x7fc17cdf99d0, size=512) at ../src/support/scratch.c:64
      WT-6  0x0000000000444629 in __wt_buf_init (session=0x18a6f60,
          buf=0x7fc17cdf99d0, size=512) at ../src/support/scratch.c:100
      WT-7  0x000000000049fb8b in __wt_block_read_off (session=0x18a6f60,
          block=0x7fc1281d8fd0, buf=0x7fc17cdf99d0, offset=169040896, size=512,
          cksum=651204990) at ../src/block/block_read.c:170
      WT-8  0x000000000049f9f7 in __wt_bm_read (bm=0x7fc1281d8ed0, session=0x18a6f60,
          buf=0x7fc17cdf99d0,
          addr=0x7fc1900252da "\343\004\351m\201\344&\320y>\305\060\060\060\060\060\061\063\062\070\067.00/opqrstuvwxyzabcdefghijklmnopqrstuvw \212\343\004หน\201\344\356\255\363\026P\253\060\060\060\060\060\061\063\062\071\071.00/opqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabc \212\343\004\333\177\201\344a\276\345\225)000001"..., addr_size=10)
          at ../src/block/block_read.c:119
      

      Here is the CONFIG:

      ############################################
      #  RUN PARAMETERS
      ############################################
      auto_throttle=1
      firstfit=0
      # bitcnt not applicable to this run
      bloom=1
      bloom_bit_count=39
      bloom_hash_count=11
      bloom_oldest=0
      cache=1
      checksum=off
      chunk_size=4
      compaction=0
      compression=none
      data_extend=0
      data_source=file
      delete_pct=2
      dictionary=0
      file_type=row-store
      hot_backups=0
      huffman_key=0
      huffman_value=0
      insert_pct=13
      internal_key_truncation=1
      internal_page_max=14
      key_gap=11
      key_max=116
      key_min=21
      leaf_page_max=9
      merge_max=16
      merge_threads=3
      ops=100000
      prefix_compression=0
      prefix_compression_min=2
      repeat_data_pct=56
      reverse=0
      rows=100000
      runs=100
      split_pct=72
      statistics=0
      threads=27
      value_max=1690
      value_min=14
      # wiredtiger_config not applicable to this run
      write_pct=25
      ############################################
      

      Needless to say, it doesn't reproduce immediately.

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              • Assignee:
                Unassigned
                Reporter:
                michael.cahill Michael Cahill
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                • Created:
                  Updated:
                  Resolved: