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  1. WiredTiger
  2. WT-678

test/format failure: NULL btree->root_page reference with LSM

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    • Type: Task
    • Status: Closed
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: WT1.6.5
    • Labels:

      Description

      I'm seeing an LSM core dump derived from the WT-566 CONFIG:

      ############################################
      #  RUN PARAMETERS
      ############################################
      # bitcnt not applicable to this run
      cache=94
      compression=none
      data_extend=0
      data_source=lsm
      delete_pct=14
      dictionary=0
      file_type=row-store
      huffman_key=0
      huffman_value=0
      insert_pct=40
      internal_key_truncation=0
      internal_page_max=14
      key_gap=4
      key_max=102
      key_min=27
      leaf_page_max=21
      ops=382656
      prefix=1
      repeat_data_pct=37
      reverse=0
      rows=600
      runs=0
      split_pct=65
      threads=10
      value_max=1024
      value_min=3
      # wiredtiger_config not applicable to this run
      write_pct=5
      

      The principal stack is:

      (gdb) where
      #0  0x00000000004a0f7b in __wt_row_search (session=0x8024a5ad0, 
          cbt=0x805620300) at ../src/btree/row_srch.c:139
      WT-1  0x0000000000493773 in __wt_btcur_insert (cbt=0x805620300)
          at ../src/btree/bt_cursor.c:314
      WT-2  0x0000000000460f2f in __curfile_insert (cursor=0x805620300)
          at ../src/cursor/cur_file.c:223
      WT-3  0x00000000004754ad in __clsm_put (session=0x8024a5ad0, clsm=0x806007300, 
          key=0x8060073b8, value=0x8060073d8, position=0)
          at ../src/lsm/lsm_cursor.c:996
      WT-4  0x000000000047516f in __clsm_insert (cursor=0x806007300)
          at ../src/lsm/lsm_cursor.c:1083
      WT-5  0x0000000000407228 in row_insert (cursor=0x806007300, key=0x7ffffe5f2f30, 
          value=0x7ffffe5f2f10, keyno=511) at ../../../test/format/ops.c:881
      WT-6  0x0000000000405df7 in ops (arg=0x80240ea30)
          at ../../../test/format/ops.c:321
       
      (gdb) p btree
      $1 = (WT_BTREE *) 0x804eee100
      (gdb) p btree->root_page
      $2 = (WT_PAGE *) 0x0
       
      (gdb) p session->dhandle->name
      $7 = 0x804fab340 "file:wt-000004.lsm"
      

      Another symptom that I see quite bit more frequently:

      t, file:wt-000013.lsm, session.checkpoint: discarded page has hazard pointer: (0x807f93d00: ../src/btree/row_srch.c, line 220)
      t, file:wt-000013.lsm, cursor.search: ../src/btree/bt_page.c, 77: page != NULL && !WT_PAGE_IS_ROOT(page)
      t, file:wt-000013.lsm, cursor.search: aborting WiredTiger library
      

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              • Assignee:
                Unassigned
                Reporter:
                keith.bostic Keith Bostic
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                Dates

                • Created:
                  Updated:
                  Resolved: