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  1. MariaDB ColumnStore
  2. MCOL-3314

Exemgr crash on query happening when we increase 2 variables, MaxOutStandingRequests and RequestSize

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.2.4
    • Fix Version/s: 1.1.0, 1.2.5
    • Component/s: ExeMgr
    • Labels:
      None
    • Environment:
      1um 2pm 1.2 development branch
    • Sprint:
      2019-05, 2019-06

      Description

      Customer reported:

      We are working on the latest 1.2-develop compiled version of columnstore. We have tested this issue with BOTH the gcc and Intel compiled versions. It appears there is a failure in ExeMgr and this causes the queries to fail, and in turn restarting ExeMgr as it should. This produces a corefile (21 G) and I will attach that output as well as the support report:

      #0 0x000055e1a9f7cd35 in construct (this=0x7f955fbf5db0, __val=@0x7f986f800000: <error reading variable>, __p=0x7f958a037ef8) at /usr/include/c++/4.8.2/ext/new_allocator.h:130
      #1 construct<unsigned int> (__a=..., __arg=@0x7f986f800000: <error reading variable>, __p=0x7f958a037ef8) at /usr/include/c++/4.8.2/ext/alloc_traits.h:216
      #2 std::vector<unsigned int, std::allocator<unsigned int> >::_M_insert_aux (this=0x7f955fbf5db0, __position=<error reading variable: Cannot access memory at address 0x7f986f800000>, __x=<optimized out>) at /usr/include/c++/4.8.2/bits/vector.tcc:353

      This appears to be happening when we increase 2 variables, MaxOutStandingRequests and RequestSize. This works with no errors: MaxOutStandingRequests = 60 RequestSize=2. However this causes the query failures and ExeMgr restart: MaxOutStandingRequests=120 RequestSize=2.

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            Assignee:
            dleeyh Daniel Lee
            Reporter:
            hill David Hill (Inactive)
            Votes:
            1 Vote for this issue
            Watchers:
            4 Start watching this issue

              Dates

              Created:
              Updated:
              Resolved:

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