Path firstLocalCache = manager.getLocalCache(firstCacheFilePublic.toUri(), conf2,
TaskTracker.getPrivateDistributedCacheDir(userName),
fs.getFileStatus(firstCacheFilePublic), false,
fs.getFileStatus(firstCacheFilePublic).getModificationTime(), true,
cfile1);
manager.releaseCache(cfile1.getStatus());
//in above code,localized a file of size 4K and then release the cache
// which will cause the cache be deleted when the limit goes out.
// The below code localize another cache which's designed to
//sweep away the first cache.
stat = fs.getFileStatus(secondCacheFilePublic);