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  1. Derby
  2. DERBY-5448

In the 10.8 branch, back out the concurrency improvements introduced by using SequenceUpdaters to allocate identity values.

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 10.8.2.2
    • 10.8.2.2
    • Documentation, SQL
    • None

    Description

      New errors were seen while running NsTest against the 10.8.2 release candidates. These errors are recorded as DERBY-5430 and DERBY-5422. The first error is a deadlock which occurs when inserting into the main table of the test. The second error is a problem clearing the identity cache. These errors have caused people to lose confidence in the concurrency improvements introduced by DERBY-4437. We should back the DERBY-4437 changes out of the 10.8 branch and use the trunk to continue debugging the problems disclosed by NsTest.

      Attachments

        1. derby-5448-01-aa-backoutConcurrencyChanges.diff
          108 kB
          Richard N. Hillegas
        2. derby-5448-02-aa-backoutDocsChanges.diff
          7 kB
          Richard N. Hillegas

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. DERBY-5422 IndexOutOfBoundsException followed by NullPointerException in cleanup during system.nstest

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. DERBY-5671 NsTest does not run on trunk do multiple issues stemming from concurrency improvements

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. DERBY-5430 Embedded nstest shows ERROR 40001: A lock could not be obtained due to a deadlock, in nstest

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. DERBY-5454 ERROR 40001 deadlock in nstest on select max(serialkey)

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. DERBY-4437 Concurrent inserts into table with identity column perform poorly

          • Major - Major loss of function.
          • Closed

          Activity

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              Unassigned Unassigned
              rhillegas Richard N. Hillegas
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              Dates

                Created:
                Updated:
                Resolved: