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From "Marshall Schor (JIRA)" <uima-...@incubator.apache.org>
Subject [jira] Commented: (UIMA-1652) Cannot hot-install a PEAR twice
Date Thu, 05 Nov 2009 12:29:32 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12773916#action_12773916
] 

Marshall Schor commented on UIMA-1652:
--------------------------------------

Do you know which Java's this works for (it appears to be using Sun class impl internals)?
 We currently test and have users who run on Sun Java 5 & 6, and IBM Java 5 & 6, and
maybe other Javas on other machines.

> 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
>         Attachments: uimaj-core_UIMA-1652.patch
>
>
> 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
error:
> 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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