 Retry ClientProtocol.addBlock() if it throws NotReplicatedYetException.
     * Because addBlock() also commits the previous block,
     * it fails if enough IBRs are not processed by NameNode.
     */
 Retry ClientProtocol.addBlock() if it throws NotReplicatedYetException.
     * Because addBlock() also commits the previous block,
     * it fails if enough IBRs are not processed by NameNode.
     */ | NNThroughputBenchmark.java