conf2.setLong("mapreduce.tasktracker.distributedcache.checkperiod", CACHE_DELETE_PERIOD_MS);
refreshConf(conf2);
TrackerDistributedCacheManager manager =
new TrackerDistributedCacheManager(conf2, taskController);
try {
manager.startCleanupThread();
FileSystem localfs = FileSystem.getLocal(conf2);
String userName = getJobOwnerName();
conf2.set("user.name", userName);
//Here we are testing the LRU. In this case we will add in 4 cache entries