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From "Olivier Terrier (JIRA)" <uima-...@incubator.apache.org>
Subject [jira] Commented: (UIMA-1652) Cannot hot-install a PEAR twice
Date Thu, 05 Nov 2009 08:39:33 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12773832#action_12773832

Olivier Terrier commented on UIMA-1652:

Apparently a A new method URLClassLoader.close() is being added in jdk 7 so the proposed patch
is just an anticipation ...

> Cannot hot-install a PEAR twice
> -------------------------------
>                 Key: UIMA-1652
>                 URL: https://issues.apache.org/jira/browse/UIMA-1652
>             Project: UIMA
>          Issue Type: Bug
>          Components: Tools
>    Affects Versions: 2.2.2
>         Environment: Windows
>            Reporter: Olivier Terrier
> Due to a java bug "URLClassLoader.getResourceAsStream locks jar files"
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5041014
> When you use PackageInstaller.installPackage(installDir, pearFile, true, true); twice
from an application because you want to hot-redeploy a new version of a PEAR, you have an
> java.io.IOException: Error while trying to clean the installation directory MyPearDir

> 	at org.apache.uima.pear.tools.InstallationController.extractFilesFromPEARFile(InstallationController.java:742)
> 	at org.apache.uima.pear.tools.InstallationController.extractPEARFile(InstallationController.java:854)
> 	at org.apache.uima.pear.tools.InstallationController.installComponent(InstallationController.java:1551)
> 	at org.apache.uima.pear.tools.PackageInstaller.installPackage(PackageInstaller.java:171)
> A patch is proposed in this article
> http://management-platform.blogspot.com/2009/01/classloaders-keeping-jar-files-open.html
> I have implemented it modifying the UIMAClassLoader and the InstallationTester classes
and it works
> I can submit a patch if you find it usefull

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