001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019package org.apache.hadoop.hbase.chaos.actions; 020 021import java.io.IOException; 022 023import org.apache.hadoop.hbase.ServerName; 024import org.apache.hadoop.hbase.chaos.monkies.PolicyBasedChaosMonkey; 025import org.slf4j.Logger; 026import org.slf4j.LoggerFactory; 027 028/** 029 * 030 * Reorder network packets on a random regionserver. 031 */ 032public class ReorderPacketsCommandAction extends TCCommandAction { 033 private static final Logger LOG = LoggerFactory.getLogger(ReorderPacketsCommandAction.class); 034 private float ratio; 035 private long duration; 036 private long delay; 037 038 /** 039 * Reorder network packets on a random regionserver. 040 * 041 * @param ratio the ratio of packets reordered 042 * @param duration the time this issue persists in milliseconds 043 * @param delay the delay between reordered and non-reordered packets in milliseconds 044 * @param timeout the timeout for executing required commands on the region server in milliseconds 045 * @param network network interface the regionserver uses for communication 046 */ 047 public ReorderPacketsCommandAction(float ratio, long duration, long delay, long timeout, 048 String network) { 049 super(timeout, network); 050 this.ratio = ratio; 051 this.duration = duration; 052 this.delay = delay; 053 } 054 055 protected void localPerform() throws IOException { 056 LOG.info("Starting to execute ReorderPacketsCommandAction"); 057 ServerName server = PolicyBasedChaosMonkey.selectRandomItem(getCurrentServers()); 058 String hostname = server.getHostname(); 059 060 try { 061 clusterManager.execSudoWithRetries(hostname, timeout, getCommand(ADD)); 062 Thread.sleep(duration); 063 } catch (InterruptedException e) { 064 LOG.debug("Failed to run the command for the full duration", e); 065 } finally { 066 clusterManager.execSudoWithRetries(hostname, timeout, getCommand(DELETE)); 067 } 068 069 LOG.info("Finished to execute ReorderPacketsCommandAction"); 070 } 071 072 private String getCommand(String operation){ 073 return String.format("tc qdisc %s dev %s root netem delay %sms reorder %s%% 50%%", 074 operation, network, delay, ratio * 100); 075 } 076}