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  1. Derby
  2. DERBY-151

Thread termination -> XSDG after operation is 'complete'

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.0.2.1
    • Fix Version/s: 10.6.1.0
    • Component/s: Store
    • Labels:
      None
    • Environment:
      Linux kernel 2.4.21-243-athlon (SuSE 9.0)
    • Issue & fix info:
      High Value Fix, Repro attached
    • Bug behavior facts:
      Seen in production

      Description

      I've encountered what appears to be a bug related to threading. After an INSERT operation, if the invoking thread terminates too quickly, Derby throws an XSDG.

      The bug is a bit difficult to isolate but it occurs consistently in the following situation (with a particular database and an operation of a particular size):

      Derby is running in embedded mode with autocommit on.
      The application performs an INPUT operation from a thread that is not the main thread. The INPUT is issued using a PreparedStatement. The INPUT adds ~ 256 records of six fields each. (Note that INSERTs of this size seem to work fine in other contexts.)

      The preparedStatement.executeUpdate() seems to excute successfully; at least it returns without throwing an exception.

      The thread that invoked the INPUT operation then terminates (but NOT the application). The next INPUT operation then results in an

      "ERROR XSDG1: Page Page(7,Container(0, 1344)) could not be written to disk, please check if disk is full."

      The disk is definitely not full.

      HOWEVER, if I put the calling thread to sleep for a second before it exits, the problem does not occur.

      I'm not quite sure what to make of this. I was under the impression that most of Derby's activity occurs in the application's threads. Could Derby be creating a child thread from in the application thread, which dies when the parent thread terminates?

      Thanks

        Attachments

        1. derby.log
          67 kB
          Jörg von Frantzius
        2. d151.java
          0.6 kB
          Knut Anders Hatlen
        3. Derby151Test.java
          2 kB
          Paul Sabatino
        4. derby-151-a.diff
          9 kB
          Dag H. Wanvik
        5. derby-151-a.stat
          0.4 kB
          Dag H. Wanvik
        6. derby-151-b.stat
          0.5 kB
          Dag H. Wanvik
        7. derby-151-b.diff
          14 kB
          Dag H. Wanvik
        8. derby-151-c.diff
          14 kB
          Dag H. Wanvik
        9. derby-151-c.stat
          0.5 kB
          Dag H. Wanvik
        10. derby-151-followup.diff
          5 kB
          Dag H. Wanvik

          Issue Links

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              People

              • Assignee:
                dagw Dag H. Wanvik
                Reporter:
                bd49 Barnet Wagman
              • Votes:
                5 Vote for this issue
                Watchers:
                7 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: