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  1. Derby
  2. DERBY-3198

Using setQueryTimeout will leak sections

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 10.3.1.4
    • 10.4.1.3
    • JDBC, Network Client
    • None

    Description

      The implementation of setQueryTimeout relies on NetStatementReply.writeSetSpecialRegister() which will allocate a dynamic section when called. No reference to this Section object is kept, and so Section.free() never gets called on it. Executing the same statment repeatedly with a query timeout set results in the client driver throwing an exception because the number of Sections exceeding 32000.

      Attachments

        1. derby-3198.v1.diff
          5 kB
          Dyre Tjeldvoll
        2. derby-3198.v2.diff
          5 kB
          Dyre Tjeldvoll
        3. derby-3198.v3.diff
          5 kB
          Dyre Tjeldvoll
        4. derby-3198.v4.diff
          7 kB
          Dyre Tjeldvoll
        5. derby-3198.v5.diff
          8 kB
          Dyre Tjeldvoll
        6. derby-3198.v6.diff
          8 kB
          Dyre Tjeldvoll
        7. repro.diff
          0.7 kB
          Dyre Tjeldvoll

        Issue Links

          is depended upon by

          Improvement - An improvement or enhancement to an existing feature or task. DERBY-3192 Cache session data in the client driver

          • Major - Major loss of function.
          • Closed
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. DERBY-5524 Speed up clean-up after StatementJdbc30Test.xtestMaxOpenStatementsWithQueryTimeout

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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            People

              dyret Dyre Tjeldvoll
              dyret Dyre Tjeldvoll
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              Dates

                Created:
                Updated:
                Resolved: