I have just run into the Apache Ivy bug java.lang.ClassCastException: org.eclipse.osgi.internal.framework.EquinoxConfiguration$1 cannot be cast to java.lang.String (link) when performing Ant task ivy:config
This morning I tried to install LibraryFolder ClasspathContainer plugin into my Eclipse (STS 3.6.1): installing it caused the above error every time I tried to perform ivy:retrieve.
Even worse, I tried to install IvyDE plugin from Eclipse Marketplace and Eclipse started to crash at a multitude of errors, including JVM crash. Uninstalling both plugins didn't fix. I tried with a new workspace and a blank Eclipse installation, but I eventually had to install my previous Eclipse plugins.
I spent the entire morning trying to fix the mess but I had to restore the previous uncommitted workspace and Eclipse installation, so now I get everything working except for the above error. Ivy worked fine until this morning.
Every Ant task of mine runs in the same JRE as Eclipse (C:\Program Files\Java\jdk1.7.0_60\jre\bin\server\jvm.dll as per sts.ini) because I use a lot the eclipse.refreshLocal task. While I can workaround the problem by removing/commenting eclipse.refreshLocal task and run Ant-Ivy tasks in a standard JRE, I'm asking if there is a workaround to get rid of the error, perhaps by deleting a key file in the workspace's metadata.
As I can read, an Ivy method is passed an object that, guessing from its name, is part of Eclipse configuration. While I'll be waiting for a bugfix, my question is how do I investigate more about the nature of this org.eclipse.osgi.internal.framework.EquinoxConfiguration$1 parameter?
