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Date: Fri, 29 Jun 2007 10:38:05 -0700 (PDT)
From: "Daniel John Debrunner (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-700) Derby does not prevent dual boot of
 database from different classloaders on Linux
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    [ https://issues.apache.org/jira/browse/DERBY-700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12509163 ] 

Daniel John Debrunner commented on DERBY-700:
---------------------------------------------

With the changes made for DERBY-2737 it might be wise to get the template server policy file to include the permission on the property derby.storage.jvmInstanceId even if this fix doesn't make it into the first 10.3 release. At least then any user's policy file might have a better chance of having the permission.

> Derby does not prevent dual boot of database from different classloaders on Linux
> ---------------------------------------------------------------------------------
>
>                 Key: DERBY-700
>                 URL: https://issues.apache.org/jira/browse/DERBY-700
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.1.2.1
>         Environment: ava -version
> java version "1.4.2_08"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_08-b03)
> Java HotSpot(TM) Client VM (build 1.4.2_08-b03, mixed mode)
>            Reporter: Kathey Marsden
>            Assignee: Kathey Marsden
>            Priority: Critical
>             Fix For: 10.3.0.0
>
>         Attachments: DERBY-700.diff, DERBY-700.stat, derby-700_06_07_07_diff.txt, derby-700_06_07_07_stat.txt, derby-700_06_19_2007, derby-700_diff.txt, derby-700_stat.txt, DERBY-700_v1_use_to_run_DualBootrepro_multithreaded.diff, DERBY-700_v1_use_to_run_DualBootrepro_multithreaded.stat, derby-700_with_NPE_fix_diff.txt, derby-700_with_NPE_fix_stat.txt, derby.log, derby700_singleproperty_v1.diff, derby700_singleproperty_v1.stat, DualBootRepro.java, DualBootRepro2.zip, DualBootRepro_mutltithreaded.tar.bz2, releaseNote.html, releaseNote.html
>
>
> Derby does not prevent dual boot from two different classloaders on Linux.
> To reproduce run the  program DualBootRepro with no derby jars in your classpath. The program assumes derby.jar is in 10.1.2.1/derby.jar, you can change the location by changing the DERBY_LIB_DIR variable.
> On Linux the output is:
> $java -cp . DualBootRepro
> Loading derby from file:10.1.2.1/derby.jar
> 10.1.2.1/derby.jar
> Booted database in loader java.net.URLClassLoader@8ed465
> FAIL: Booted database in 2nd loader java.net.URLClassLoader@dc6a77
> On Windows I get the expected output.
> $ java -cp . DualBootRepro
> Loading derby from file:10.1.2.1/derby.jar
> 10.1.2.1/derby.jar
> Booted database in loader java.net.URLClassLoader@1ac04e8
> PASS: Expected exception for dualboot:Another instance of Derby may have already booted the database D:\marsden\repro\dualboot\mydb.

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