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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4081) BTreeController.comparePreviousRecord() may fail to release latch on left-most leaf
Date Tue, 03 Mar 2009 11:02:56 GMT
BTreeController.comparePreviousRecord() may fail to release latch on left-most leaf
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                 Key: DERBY-4081
                 URL: https://issues.apache.org/jira/browse/DERBY-4081
             Project: Derby
          Issue Type: Bug
          Components: Store
    Affects Versions: 10.4.2.0
            Reporter: Knut Anders Hatlen


If comparePreviousRecord() is called on some other leaf page than the left-most leaf, and
all the rows to the left of the current position are deleted so that the position is moved
all the way to slot 0 on the left-most leaf, comparePreviousRecord() will return without releasing
the latch on the left-most leaf. Only the leaf on which comparePreviousRecord() is called
should be latched when the method returns.

Since comparePreviousRecord() currently fails to continue after finding a deleted row, this
bug is not possible to expose until DERBY-4028 is fixed.

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