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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-2162) Shutting down a database loaded from a jar file via the classpath and URLClassLoader leaves an open file reference to the jar file containing the database.
Date Tue, 07 Jul 2009 14:41:15 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Knut Anders Hatlen updated DERBY-2162:
--------------------------------------

    Urgency: Normal

Triaged for 10.5.2.

> Shutting down a database loaded from a jar file via the classpath and URLClassLoader
 leaves an open file reference to the jar file containing the database.
> ------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-2162
>                 URL: https://issues.apache.org/jira/browse/DERBY-2162
>             Project: Derby
>          Issue Type: Bug
>          Components: Services
>    Affects Versions: 10.2.1.6, 10.3.1.4
>            Reporter: Daniel John Debrunner
>            Priority: Minor
>
> A bug in java.net.URLClassLoader causes the underlying jar file to be held open once
a resource has been fetched and opened.
> Loading a class or just accessing the URL for the resource does not keep the jar open.
Reported the bug to Sun, it is similar to the existing bug Java bug 4950148 but in this case
no amount of garbage collection will close the jar.
> Derby exposes this as all containers/files are opened using as resources when loading
the database from the classpath.
> On windows this is seen as the inability to delete the jar file, seen by the fixture
testDatabaseInClasspath in DatabaseClassLoadingTest.
> Similar to DERBY-2083 but due to a different cause.

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