We have upgraded our project from java 7 and ant 1.8 to java 8 and ant 1.9. In java 7, we were able to use apache velocity 1.7 without any issues. However after upgrading to java 8, we get ConcurrentModificationException.
Caused by: java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
at java.util.ArrayList$Itr.next(ArrayList.java:859)
at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:393)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
at org.apache.velocity.Template.merge(Template.java:356)
at org.apache.velocity.Template.merge(Template.java:260)
at org.apache.velocity.texen.Generator.parse(Generator.java:445)
What could be the reason and the solution?
