log.info("server1: keys: " + keys);
assertEquals("server1 keys size", 2, keys.size());
Collection<?> vals = ds0.listAllValues(NOTIFY_CATEGORY);
log.info("server0: values: " + vals);
assertEquals("server0 values size", 2, vals.size());
vals = ds1.listAllValues(NOTIFY_CATEGORY);
log.info("server1: values: " + vals);
assertEquals("server1 values size", 2, vals.size());
ds0.remove("key0");
value = (String) ds1.get("key0");