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  1. WiredTiger
  2. WT-7512

WT_ROLLBACK when repeating operations after rollback-to-stable

    • Type: Icon: Technical Debt Technical Debt
    • Resolution: Duplicate
    • Priority: Icon: Major - P3 Major - P3
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    • Affects Version/s: None
    • Component/s: None
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      I'm seeing a failure in the wt-6403-restore-format-testing branch (the branch to turn format testing back on). It's when we're repeating reads after calling rollback-to-stable, we get a WT_ROLLBACK error on one of the reads.

      Here's the CONFIG:

          ############################################
          #  RUN PARAMETERS: V2
          ############################################
          assert.read_timestamp=0
          assert.write_timestamp=0
          backup=1
          backup.incremental=block
          backup.incr_granularity=16384
          btree.bitcnt=4
          btree.compression=none
          btree.dictionary=0
          btree.huffman_value=0
          btree.internal_key_truncation=1
          btree.internal_page_max=13
          btree.key_gap=3
          btree.key_max=51
          btree.key_min=15
          btree.leaf_page_max=12
          btree.memory_page_max=3
          btree.prefix_compression=1
          btree.prefix_compression_min=6
          btree.repeat_data_pct=13
          btree.reverse=0
          btree.split_pct=85
          btree.value_max=2721
          btree.value_min=18
          cache=24
          cache.evict_max=3
          cache.minimum=20
          checkpoint=on
          checkpoint.log_size=176
          checkpoint.wait=89
          disk.checksum=uncompressed
          disk.data_extend=0
          disk.direct_io=0
          disk.encryption=none
          disk.firstfit=0
          disk.mmap=1
          disk.mmap_all=0
          format.abort=0
          format.independent_thread_rng=0
          format.major_timeout=0
          import=0
          logging=1
          logging.archive=1
          logging.compression=none
          logging.file_max=413476
          logging.prealloc=1
          lsm.auto_throttle=1
          lsm.bloom=1
          lsm.bloom_bit_count=16
          lsm.bloom_hash_count=18                                                       
          lsm.bloom_oldest=0
          lsm.chunk_size=10                                                             
          lsm.merge_max=13
          lsm.worker_threads=4
          ops.alter=0
          ops.compaction=0
          ops.hs_cursor=0                                                               
          ops.pct.delete=63                                                             
          ops.pct.insert=3
          ops.pct.modify=33
          ops.pct.read=1
          ops.pct.write=0
          ops.prepare=0
          ops.random_cursor=0
          ops.salvage=0
          ops.truncate=1                                                                
          ops.verify=1
          quiet=1
          runs=1                                                                        
          runs.in_memory=0                                                              
          runs.ops=0
          runs.rows=1000000
          runs.source=table                                                             
          runs.threads=4
          runs.timer=11
          runs.type=row-store
          runs.verify_failure_dump=0
          statistics=0                                                                  
          statistics.server=0
          stress.aggressive_sweep=0
          stress.checkpoint=0                                                           
          stress.checkpoint_prepare=0                                                   
          stress.hs_checkpoint_delay=0
          stress.hs_search=0
          stress.hs_sweep=0
          stress.split_1=0
          stress.split_2=0
          stress.split_3=0
          stress.split_4=0
          stress.split_5=0
          stress.split_6=0
          stress.split_7=1
          stress.split_8=0
          transaction.implicit=0
          transaction.timestamps=1
          wiredtiger.config=
          wiredtiger.rwlock=1
          wiredtiger.leak_memory=0
          ############################################
      

      I see it happen repeatedly, but it's not terribly common, maybe every few hundred runs on my ubuntu spawned host.

            Assignee:
            keith.bostic@mongodb.com Keith Bostic (Inactive)
            Reporter:
            keith.bostic@mongodb.com Keith Bostic (Inactive)
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              Created:
              Updated:
              Resolved: