[UIMA-1652] Cannot hot-install a PEAR twice

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Abandoned
• Affects Version/s: 2.2.2
• Component/s: Tools
• Labels: Stale

Environment

Windows

• Assignee: Unassigned
• Reporter: Olivier Terrier
• Created: 05/Nov/09 08:22
• Updated: 15/Sep/20 17:04
• Resolved: 15/Sep/20 17:04

Description

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

Issue Links

• relates to: UIMA-496 PEAR API does not delete the PEAR ID subdirectory before the new content is installed