LRUDataContainer keySet() looping fails when inside there's a get call

LRUDataContainer has issues with looping when inside the loop there's a get() call on the data container. Example from LRUDataContainerTest:

public void testPutAndLoop() {
for (int i = 0; i < 10; i++) dc.put(i, "value", -1, -1);

int i = 0;
for (Object key : dc.keySet())

{ dc.get(key); i++; }

assert i == 10;
}

Currently, the test fails cos the final value of i is 1. This means that the loop only runs once when it should have run 10 times.