I'm trying to use Shrinkwrap to delete a folder in a JavaArchive (jar). My jar is quite simple, it contains only one folder named resources and this folder contains two files :
 
myJavaArchive.jar:
/resources/
/resources/bar.txt
/resources/foo.txt
 
So I create a JavaArchive from my JAR file and I call delete method on "/resources" folder (see below) but it causes a ConcurrentModifictionException.
 
My code : 
 
package com.test;
  
import java.io.File;
  
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.spec.JavaArchive;
  
public class Main {
    public static void main(String[] args) {
        JavaArchive archive = ShrinkWrap.createFromZipFile(JavaArchive.class,
                new File(Main.class.getResource("/myJavaArchive.jar").getFile()));
        System.out.println(archive.toString(true));
        archive.delete("/resources");
    }
}
 
 
The stack trace :
 
Exception in thread "main" java.util.ConcurrentModificationException
          at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
          at java.util.HashMap$KeyIterator.next(HashMap.java:828)
          at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1010)
          at org.jboss.shrinkwrap.impl.base.MemoryMapArchiveBase.removeNodeRecursively(MemoryMapArchiveBase.java:309)
          at org.jboss.shrinkwrap.impl.base.MemoryMapArchiveBase.delete(MemoryMapArchiveBase.java:291)
          at org.jboss.shrinkwrap.impl.base.MemoryMapArchiveBase.delete(MemoryMapArchiveBase.java:325)
          at org.jboss.shrinkwrap.impl.base.container.ContainerBase.delete(ContainerBase.java:393)
          at com.test.Main.main(Main.java:13)