acc_35_stacktrace.log

java.lang.UnsupportedOperationException: IteratorChains must contain at least one Iterator
    at org.apache.commons.collections.iterators.IteratorChain.checkChainIntegrity(IteratorChain.java:250)
    at org.apache.commons.collections.iterators.IteratorChain.lockChain(IteratorChain.java:258)
    at org.apache.commons.collections.iterators.IteratorChain.hasNext(IteratorChain.java:298)