URLClassLoader locks the contrubution jar.
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Key: TUSCANY-3939
URL: https://issues.apache.org/jira/browse/TUSCANY-3939
Project: Tuscany
Issue Type: Bug
Components: Java SCA Assembly Model
Affects Versions: Java-SCA-2.0-Beta1
Environment: All
Reporter: Hasan Muhammad
Priority: Critical
Fix For: Java-SCA-2.0
When a contribution is started, tuscany 2.0 uses URLClassLoader to load the
classes/resources from the contribution. It locks the jar file and does not
release the lock even on contribution stop. This is not a bug in tuscany code.
This is a problem with Sun's URLClassLoader. Sun has a fix for this that is
planned for Java 1.7. But for now, during contribution stop, the following
method could be used without any issues, to release the classloader and all the
resources it holds
ClassLoaderUtil.releaseLoader((URLClassLoader)context.getApplicationClassLoader().getParent());
Note that this method needs to be called on all Unused Contributions in the
node, so that those contributions are also unlocked. The list of unused
contributions already exists in the node since we have the following method
node.stopCompositeAndUninstallUnused
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