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  1. WiredTiger
  2. WT-5118

Remove incorrect assert that there are no hazard references to discarded WT_REF

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    • Type: Icon: Bug Bug
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 4.3.1, WT10.0.0, 4.2.2
    • Affects Version/s: None
    • Component/s: None
    • None
    • 13
    • Storage Engines 2019-09-23, Storage Engines 2019-10-07, Storage Engines 2019-10-21

      Summary: There was a diagnostic assertion that no hazard pointers were held on pages discarded during an in-memory split, and that's not correct, so the assertion was removed.

      ===================================================
      I've been running the repro case looking for the failure in WT-5043 with the new debugging. I was running 10 parallel jobs on ocelot-aws. I started this several days ago, so the tree is running develop as of changeset 359fb2736f.

      Over the weekend, after 1100 iterations, one of them hit a hazard check assertion:

      [1567955476:353235][27283:0x7fc818ff9700], t, file:WiredTigerLAS.wt, WT_CURSOR.update: __wt_hazard_check_assert, 406: hazard pointer reference to 
discarded object: (0x7fc80c06a810: session 0x7fc844b8bc30 name WT_CURSOR.update: __wt_row_search, line 437)
[1567955476:353321][27283:0x7fc818ff9700], t, file:WiredTigerLAS.wt, WT_CURSOR.update: __split_parent, 840: __wt_hazard_check_assert(session, next
_ref, false)
[1567955476:353328][27283:0x7fc818ff9700], t, file:WiredTigerLAS.wt, WT_CURSOR.update: __wt_abort, 28: aborting WiredTiger library

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