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From "Kathey Marsden (JIRA)" <derby-...@db.apache.org>
Subject [jira] Created: (DERBY-1838) Derby allows dual boot which can cause corruption of databases with JVM's lower than 1.4.2 on non-windows systems
Date Mon, 11 Sep 2006 17:59:23 GMT
Derby allows dual boot which  can cause corruption of databases with JVM's lower than 1.4.2
on non-windows systems 
-------------------------------------------------------------------------------------------------------------------

                 Key: DERBY-1838
                 URL: http://issues.apache.org/jira/browse/DERBY-1838
             Project: Derby
          Issue Type: Bug
          Components: Store
    Affects Versions: 10.1.3.1, 10.1.3.0, 10.1.2.1, 10.1.1.0, 10.0.2.1, 10.0.2.0, 10.0.2.2,
10.1.3.2, 10.1.4.0, 10.2.1.0, 10.2.2.0, 10.3.0.0
            Reporter: Kathey Marsden
            Priority: Critical


On non-windows systems accidental access of  a database from two JVM's is not prevented on
 JVM's lower than 1.4.2.   The issue can be triggered  by a common user error, for example
accessing a database from two ij sessions.  This can cause unrecoverable corruption.  It is
critical that users upgrade to 1.4.2 if there is a possibility that a user might access Derby
in this way.

There was no known way to fix this issue until 1.4.2, so it is not likely that it can be resolved
within Derby.  Upgrade of the JVM is the only known solution now.

Note: Even with 1.4.2 the dual boot issue exists in certain scenarios which are not well documented.
 DERBY-700 has been filed and hopefully other fatal usage cases that can lead to dual boot
can be isolated and resolved.

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