You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/01/27 15:13:51 UTC
[07/24] hbase-site git commit: Published site at .
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/48b00154/testdevapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.MockMapping.html
----------------------------------------------------------------------
diff --git a/testdevapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.MockMapping.html b/testdevapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.MockMapping.html
index a08a9a1..280556d 100644
--- a/testdevapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.MockMapping.html
+++ b/testdevapidocs/src-html/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.MockMapping.html
@@ -42,558 +42,564 @@
<span class="sourceLineNo">034</span>import java.util.SortedSet;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import java.util.TreeMap;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import java.util.TreeSet;<a name="line.36"></a>
-<span class="sourceLineNo">037</span><a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.apache.hadoop.conf.Configuration;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.ServerName;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.TableName;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.client.RegionInfoBuilder;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.client.RegionReplicaUtil;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.master.RackManager;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.master.RegionPlan;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.net.DNSToSwitchMapping;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.junit.Assert;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.junit.BeforeClass;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.slf4j.Logger;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.slf4j.LoggerFactory;<a name="line.52"></a>
-<span class="sourceLineNo">053</span><a name="line.53"></a>
-<span class="sourceLineNo">054</span>/**<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * Class used to be the base of unit tests on load balancers. It gives helper<a name="line.55"></a>
-<span class="sourceLineNo">056</span> * methods to create maps of {@link ServerName} to lists of {@link RegionInfo}<a name="line.56"></a>
-<span class="sourceLineNo">057</span> * and to check list of region plans.<a name="line.57"></a>
-<span class="sourceLineNo">058</span> *<a name="line.58"></a>
-<span class="sourceLineNo">059</span> */<a name="line.59"></a>
-<span class="sourceLineNo">060</span>public class BalancerTestBase {<a name="line.60"></a>
-<span class="sourceLineNo">061</span> private static final Logger LOG = LoggerFactory.getLogger(BalancerTestBase.class);<a name="line.61"></a>
-<span class="sourceLineNo">062</span> protected static Random rand = new Random();<a name="line.62"></a>
-<span class="sourceLineNo">063</span> static int regionId = 0;<a name="line.63"></a>
-<span class="sourceLineNo">064</span> protected static Configuration conf;<a name="line.64"></a>
-<span class="sourceLineNo">065</span> protected static StochasticLoadBalancer loadBalancer;<a name="line.65"></a>
-<span class="sourceLineNo">066</span><a name="line.66"></a>
-<span class="sourceLineNo">067</span> @BeforeClass<a name="line.67"></a>
-<span class="sourceLineNo">068</span> public static void beforeAllTests() throws Exception {<a name="line.68"></a>
-<span class="sourceLineNo">069</span> conf = HBaseConfiguration.create();<a name="line.69"></a>
-<span class="sourceLineNo">070</span> conf.setClass("hbase.util.ip.to.rack.determiner", MockMapping.class, DNSToSwitchMapping.class);<a name="line.70"></a>
-<span class="sourceLineNo">071</span> conf.setFloat("hbase.master.balancer.stochastic.maxMovePercent", 0.75f);<a name="line.71"></a>
-<span class="sourceLineNo">072</span> conf.setFloat("hbase.regions.slop", 0.0f);<a name="line.72"></a>
-<span class="sourceLineNo">073</span> conf.setFloat("hbase.master.balancer.stochastic.localityCost", 0);<a name="line.73"></a>
-<span class="sourceLineNo">074</span> loadBalancer = new StochasticLoadBalancer();<a name="line.74"></a>
-<span class="sourceLineNo">075</span> loadBalancer.setConf(conf);<a name="line.75"></a>
-<span class="sourceLineNo">076</span> }<a name="line.76"></a>
-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span> protected int[] largeCluster = new int[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.78"></a>
-<span class="sourceLineNo">079</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.79"></a>
-<span class="sourceLineNo">080</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.80"></a>
-<span class="sourceLineNo">081</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.81"></a>
-<span class="sourceLineNo">082</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.82"></a>
-<span class="sourceLineNo">083</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.83"></a>
-<span class="sourceLineNo">084</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.84"></a>
-<span class="sourceLineNo">085</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.85"></a>
+<span class="sourceLineNo">037</span>import java.util.concurrent.ThreadLocalRandom;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import java.util.stream.Collectors;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import java.util.stream.Stream;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.conf.Configuration;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.CategoryBasedTimeout;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.ServerName;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.TableName;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.client.RegionInfoBuilder;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.client.RegionReplicaUtil;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.master.RackManager;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.master.RegionPlan;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.hadoop.net.DNSToSwitchMapping;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.junit.Assert;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.junit.BeforeClass;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.junit.Rule;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.junit.rules.TestRule;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.slf4j.Logger;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.slf4j.LoggerFactory;<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span>/**<a name="line.59"></a>
+<span class="sourceLineNo">060</span> * Class used to be the base of unit tests on load balancers. It gives helper<a name="line.60"></a>
+<span class="sourceLineNo">061</span> * methods to create maps of {@link ServerName} to lists of {@link RegionInfo}<a name="line.61"></a>
+<span class="sourceLineNo">062</span> * and to check list of region plans.<a name="line.62"></a>
+<span class="sourceLineNo">063</span> *<a name="line.63"></a>
+<span class="sourceLineNo">064</span> */<a name="line.64"></a>
+<span class="sourceLineNo">065</span>public class BalancerTestBase {<a name="line.65"></a>
+<span class="sourceLineNo">066</span> private static final Logger LOG = LoggerFactory.getLogger(BalancerTestBase.class);<a name="line.66"></a>
+<span class="sourceLineNo">067</span> static int regionId = 0;<a name="line.67"></a>
+<span class="sourceLineNo">068</span> protected static Configuration conf;<a name="line.68"></a>
+<span class="sourceLineNo">069</span> protected static StochasticLoadBalancer loadBalancer;<a name="line.69"></a>
+<span class="sourceLineNo">070</span><a name="line.70"></a>
+<span class="sourceLineNo">071</span> @Rule<a name="line.71"></a>
+<span class="sourceLineNo">072</span> public final TestRule timeout = CategoryBasedTimeout.forClass(getClass());<a name="line.72"></a>
+<span class="sourceLineNo">073</span><a name="line.73"></a>
+<span class="sourceLineNo">074</span> @BeforeClass<a name="line.74"></a>
+<span class="sourceLineNo">075</span> public static void beforeAllTests() throws Exception {<a name="line.75"></a>
+<span class="sourceLineNo">076</span> conf = HBaseConfiguration.create();<a name="line.76"></a>
+<span class="sourceLineNo">077</span> conf.setClass("hbase.util.ip.to.rack.determiner", MockMapping.class, DNSToSwitchMapping.class);<a name="line.77"></a>
+<span class="sourceLineNo">078</span> conf.setFloat("hbase.master.balancer.stochastic.maxMovePercent", 0.75f);<a name="line.78"></a>
+<span class="sourceLineNo">079</span> conf.setFloat("hbase.regions.slop", 0.0f);<a name="line.79"></a>
+<span class="sourceLineNo">080</span> conf.setFloat("hbase.master.balancer.stochastic.localityCost", 0);<a name="line.80"></a>
+<span class="sourceLineNo">081</span> loadBalancer = new StochasticLoadBalancer();<a name="line.81"></a>
+<span class="sourceLineNo">082</span> loadBalancer.setConf(conf);<a name="line.82"></a>
+<span class="sourceLineNo">083</span> }<a name="line.83"></a>
+<span class="sourceLineNo">084</span><a name="line.84"></a>
+<span class="sourceLineNo">085</span> protected int[] largeCluster = new int[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.85"></a>
<span class="sourceLineNo">086</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.86"></a>
<span class="sourceLineNo">087</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.87"></a>
<span class="sourceLineNo">088</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.88"></a>
<span class="sourceLineNo">089</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.89"></a>
<span class="sourceLineNo">090</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.90"></a>
-<span class="sourceLineNo">091</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 56 };<a name="line.91"></a>
-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span> // int[testnum][servernumber] -> numregions<a name="line.93"></a>
-<span class="sourceLineNo">094</span> protected int[][] clusterStateMocks = new int[][]{<a name="line.94"></a>
-<span class="sourceLineNo">095</span> // 1 node<a name="line.95"></a>
-<span class="sourceLineNo">096</span> new int[]{0},<a name="line.96"></a>
-<span class="sourceLineNo">097</span> new int[]{1},<a name="line.97"></a>
-<span class="sourceLineNo">098</span> new int[]{10},<a name="line.98"></a>
-<span class="sourceLineNo">099</span> // 2 node<a name="line.99"></a>
-<span class="sourceLineNo">100</span> new int[]{0, 0},<a name="line.100"></a>
-<span class="sourceLineNo">101</span> new int[]{2, 0},<a name="line.101"></a>
-<span class="sourceLineNo">102</span> new int[]{2, 1},<a name="line.102"></a>
-<span class="sourceLineNo">103</span> new int[]{2, 2},<a name="line.103"></a>
-<span class="sourceLineNo">104</span> new int[]{2, 3},<a name="line.104"></a>
-<span class="sourceLineNo">105</span> new int[]{2, 4},<a name="line.105"></a>
-<span class="sourceLineNo">106</span> new int[]{1, 1},<a name="line.106"></a>
-<span class="sourceLineNo">107</span> new int[]{0, 1},<a name="line.107"></a>
-<span class="sourceLineNo">108</span> new int[]{10, 1},<a name="line.108"></a>
-<span class="sourceLineNo">109</span> new int[]{514, 1432},<a name="line.109"></a>
-<span class="sourceLineNo">110</span> new int[]{48, 53},<a name="line.110"></a>
-<span class="sourceLineNo">111</span> // 3 node<a name="line.111"></a>
-<span class="sourceLineNo">112</span> new int[]{0, 1, 2},<a name="line.112"></a>
-<span class="sourceLineNo">113</span> new int[]{1, 2, 3},<a name="line.113"></a>
-<span class="sourceLineNo">114</span> new int[]{0, 2, 2},<a name="line.114"></a>
-<span class="sourceLineNo">115</span> new int[]{0, 3, 0},<a name="line.115"></a>
-<span class="sourceLineNo">116</span> new int[]{0, 4, 0},<a name="line.116"></a>
-<span class="sourceLineNo">117</span> new int[]{20, 20, 0},<a name="line.117"></a>
-<span class="sourceLineNo">118</span> // 4 node<a name="line.118"></a>
-<span class="sourceLineNo">119</span> new int[]{0, 1, 2, 3},<a name="line.119"></a>
-<span class="sourceLineNo">120</span> new int[]{4, 0, 0, 0},<a name="line.120"></a>
-<span class="sourceLineNo">121</span> new int[]{5, 0, 0, 0},<a name="line.121"></a>
-<span class="sourceLineNo">122</span> new int[]{6, 6, 0, 0},<a name="line.122"></a>
-<span class="sourceLineNo">123</span> new int[]{6, 2, 0, 0},<a name="line.123"></a>
-<span class="sourceLineNo">124</span> new int[]{6, 1, 0, 0},<a name="line.124"></a>
-<span class="sourceLineNo">125</span> new int[]{6, 0, 0, 0},<a name="line.125"></a>
-<span class="sourceLineNo">126</span> new int[]{4, 4, 4, 7},<a name="line.126"></a>
-<span class="sourceLineNo">127</span> new int[]{4, 4, 4, 8},<a name="line.127"></a>
-<span class="sourceLineNo">128</span> new int[]{0, 0, 0, 7},<a name="line.128"></a>
-<span class="sourceLineNo">129</span> // 5 node<a name="line.129"></a>
-<span class="sourceLineNo">130</span> new int[]{1, 1, 1, 1, 4},<a name="line.130"></a>
-<span class="sourceLineNo">131</span> // 6 nodes<a name="line.131"></a>
-<span class="sourceLineNo">132</span> new int[]{1500, 500, 500, 500, 10, 0},<a name="line.132"></a>
-<span class="sourceLineNo">133</span> new int[]{1500, 500, 500, 500, 500, 0},<a name="line.133"></a>
-<span class="sourceLineNo">134</span> // more nodes<a name="line.134"></a>
-<span class="sourceLineNo">135</span> new int[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},<a name="line.135"></a>
-<span class="sourceLineNo">136</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 10},<a name="line.136"></a>
-<span class="sourceLineNo">137</span> new int[]{6, 6, 5, 6, 6, 6, 6, 6, 6, 1},<a name="line.137"></a>
-<span class="sourceLineNo">138</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 54},<a name="line.138"></a>
-<span class="sourceLineNo">139</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 55},<a name="line.139"></a>
-<span class="sourceLineNo">140</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 56},<a name="line.140"></a>
-<span class="sourceLineNo">141</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 16},<a name="line.141"></a>
-<span class="sourceLineNo">142</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 8},<a name="line.142"></a>
-<span class="sourceLineNo">143</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 9},<a name="line.143"></a>
-<span class="sourceLineNo">144</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 10},<a name="line.144"></a>
-<span class="sourceLineNo">145</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 123},<a name="line.145"></a>
-<span class="sourceLineNo">146</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 155},<a name="line.146"></a>
-<span class="sourceLineNo">147</span> new int[]{10, 7, 12, 8, 11, 10, 9, 14},<a name="line.147"></a>
-<span class="sourceLineNo">148</span> new int[]{13, 14, 6, 10, 10, 10, 8, 10},<a name="line.148"></a>
-<span class="sourceLineNo">149</span> new int[]{130, 14, 60, 10, 100, 10, 80, 10},<a name="line.149"></a>
-<span class="sourceLineNo">150</span> new int[]{130, 140, 60, 100, 100, 100, 80, 100},<a name="line.150"></a>
-<span class="sourceLineNo">151</span> new int[]{0, 5 , 5, 5, 5},<a name="line.151"></a>
-<span class="sourceLineNo">152</span> largeCluster,<a name="line.152"></a>
-<span class="sourceLineNo">153</span><a name="line.153"></a>
-<span class="sourceLineNo">154</span> };<a name="line.154"></a>
-<span class="sourceLineNo">155</span><a name="line.155"></a>
-<span class="sourceLineNo">156</span><a name="line.156"></a>
-<span class="sourceLineNo">157</span> // This class is introduced because IP to rack resolution can be lengthy.<a name="line.157"></a>
-<span class="sourceLineNo">158</span> public static class MockMapping implements DNSToSwitchMapping {<a name="line.158"></a>
-<span class="sourceLineNo">159</span> public MockMapping(Configuration conf) {<a name="line.159"></a>
-<span class="sourceLineNo">160</span> }<a name="line.160"></a>
-<span class="sourceLineNo">161</span><a name="line.161"></a>
-<span class="sourceLineNo">162</span> @Override<a name="line.162"></a>
-<span class="sourceLineNo">163</span> public List<String> resolve(List<String> names) {<a name="line.163"></a>
-<span class="sourceLineNo">164</span> List<String> ret = new ArrayList<>(names.size());<a name="line.164"></a>
-<span class="sourceLineNo">165</span> for (String name : names) {<a name="line.165"></a>
-<span class="sourceLineNo">166</span> ret.add("rack");<a name="line.166"></a>
-<span class="sourceLineNo">167</span> }<a name="line.167"></a>
-<span class="sourceLineNo">168</span> return ret;<a name="line.168"></a>
-<span class="sourceLineNo">169</span> }<a name="line.169"></a>
-<span class="sourceLineNo">170</span><a name="line.170"></a>
-<span class="sourceLineNo">171</span> // do not add @Override annotations here. It mighty break compilation with earlier Hadoops<a name="line.171"></a>
-<span class="sourceLineNo">172</span> public void reloadCachedMappings() {<a name="line.172"></a>
-<span class="sourceLineNo">173</span> }<a name="line.173"></a>
-<span class="sourceLineNo">174</span><a name="line.174"></a>
-<span class="sourceLineNo">175</span> // do not add @Override annotations here. It mighty break compilation with earlier Hadoops<a name="line.175"></a>
-<span class="sourceLineNo">176</span> public void reloadCachedMappings(List<String> arg0) {<a name="line.176"></a>
-<span class="sourceLineNo">177</span> }<a name="line.177"></a>
-<span class="sourceLineNo">178</span> }<a name="line.178"></a>
-<span class="sourceLineNo">179</span><a name="line.179"></a>
-<span class="sourceLineNo">180</span> /**<a name="line.180"></a>
-<span class="sourceLineNo">181</span> * Invariant is that all servers have between floor(avg) and ceiling(avg)<a name="line.181"></a>
-<span class="sourceLineNo">182</span> * number of regions.<a name="line.182"></a>
-<span class="sourceLineNo">183</span> */<a name="line.183"></a>
-<span class="sourceLineNo">184</span> public void assertClusterAsBalanced(List<ServerAndLoad> servers) {<a name="line.184"></a>
-<span class="sourceLineNo">185</span> int numServers = servers.size();<a name="line.185"></a>
-<span class="sourceLineNo">186</span> int numRegions = 0;<a name="line.186"></a>
-<span class="sourceLineNo">187</span> int maxRegions = 0;<a name="line.187"></a>
-<span class="sourceLineNo">188</span> int minRegions = Integer.MAX_VALUE;<a name="line.188"></a>
-<span class="sourceLineNo">189</span> for (ServerAndLoad server : servers) {<a name="line.189"></a>
-<span class="sourceLineNo">190</span> int nr = server.getLoad();<a name="line.190"></a>
-<span class="sourceLineNo">191</span> if (nr > maxRegions) {<a name="line.191"></a>
-<span class="sourceLineNo">192</span> maxRegions = nr;<a name="line.192"></a>
-<span class="sourceLineNo">193</span> }<a name="line.193"></a>
-<span class="sourceLineNo">194</span> if (nr < minRegions) {<a name="line.194"></a>
-<span class="sourceLineNo">195</span> minRegions = nr;<a name="line.195"></a>
+<span class="sourceLineNo">091</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.91"></a>
+<span class="sourceLineNo">092</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.92"></a>
+<span class="sourceLineNo">093</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.93"></a>
+<span class="sourceLineNo">094</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.94"></a>
+<span class="sourceLineNo">095</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.95"></a>
+<span class="sourceLineNo">096</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.96"></a>
+<span class="sourceLineNo">097</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.97"></a>
+<span class="sourceLineNo">098</span> 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 56 };<a name="line.98"></a>
+<span class="sourceLineNo">099</span><a name="line.99"></a>
+<span class="sourceLineNo">100</span> // int[testnum][servernumber] -> numregions<a name="line.100"></a>
+<span class="sourceLineNo">101</span> protected int[][] clusterStateMocks = new int[][]{<a name="line.101"></a>
+<span class="sourceLineNo">102</span> // 1 node<a name="line.102"></a>
+<span class="sourceLineNo">103</span> new int[]{0},<a name="line.103"></a>
+<span class="sourceLineNo">104</span> new int[]{1},<a name="line.104"></a>
+<span class="sourceLineNo">105</span> new int[]{10},<a name="line.105"></a>
+<span class="sourceLineNo">106</span> // 2 node<a name="line.106"></a>
+<span class="sourceLineNo">107</span> new int[]{0, 0},<a name="line.107"></a>
+<span class="sourceLineNo">108</span> new int[]{2, 0},<a name="line.108"></a>
+<span class="sourceLineNo">109</span> new int[]{2, 1},<a name="line.109"></a>
+<span class="sourceLineNo">110</span> new int[]{2, 2},<a name="line.110"></a>
+<span class="sourceLineNo">111</span> new int[]{2, 3},<a name="line.111"></a>
+<span class="sourceLineNo">112</span> new int[]{2, 4},<a name="line.112"></a>
+<span class="sourceLineNo">113</span> new int[]{1, 1},<a name="line.113"></a>
+<span class="sourceLineNo">114</span> new int[]{0, 1},<a name="line.114"></a>
+<span class="sourceLineNo">115</span> new int[]{10, 1},<a name="line.115"></a>
+<span class="sourceLineNo">116</span> new int[]{514, 1432},<a name="line.116"></a>
+<span class="sourceLineNo">117</span> new int[]{48, 53},<a name="line.117"></a>
+<span class="sourceLineNo">118</span> // 3 node<a name="line.118"></a>
+<span class="sourceLineNo">119</span> new int[]{0, 1, 2},<a name="line.119"></a>
+<span class="sourceLineNo">120</span> new int[]{1, 2, 3},<a name="line.120"></a>
+<span class="sourceLineNo">121</span> new int[]{0, 2, 2},<a name="line.121"></a>
+<span class="sourceLineNo">122</span> new int[]{0, 3, 0},<a name="line.122"></a>
+<span class="sourceLineNo">123</span> new int[]{0, 4, 0},<a name="line.123"></a>
+<span class="sourceLineNo">124</span> new int[]{20, 20, 0},<a name="line.124"></a>
+<span class="sourceLineNo">125</span> // 4 node<a name="line.125"></a>
+<span class="sourceLineNo">126</span> new int[]{0, 1, 2, 3},<a name="line.126"></a>
+<span class="sourceLineNo">127</span> new int[]{4, 0, 0, 0},<a name="line.127"></a>
+<span class="sourceLineNo">128</span> new int[]{5, 0, 0, 0},<a name="line.128"></a>
+<span class="sourceLineNo">129</span> new int[]{6, 6, 0, 0},<a name="line.129"></a>
+<span class="sourceLineNo">130</span> new int[]{6, 2, 0, 0},<a name="line.130"></a>
+<span class="sourceLineNo">131</span> new int[]{6, 1, 0, 0},<a name="line.131"></a>
+<span class="sourceLineNo">132</span> new int[]{6, 0, 0, 0},<a name="line.132"></a>
+<span class="sourceLineNo">133</span> new int[]{4, 4, 4, 7},<a name="line.133"></a>
+<span class="sourceLineNo">134</span> new int[]{4, 4, 4, 8},<a name="line.134"></a>
+<span class="sourceLineNo">135</span> new int[]{0, 0, 0, 7},<a name="line.135"></a>
+<span class="sourceLineNo">136</span> // 5 node<a name="line.136"></a>
+<span class="sourceLineNo">137</span> new int[]{1, 1, 1, 1, 4},<a name="line.137"></a>
+<span class="sourceLineNo">138</span> // 6 nodes<a name="line.138"></a>
+<span class="sourceLineNo">139</span> new int[]{1500, 500, 500, 500, 10, 0},<a name="line.139"></a>
+<span class="sourceLineNo">140</span> new int[]{1500, 500, 500, 500, 500, 0},<a name="line.140"></a>
+<span class="sourceLineNo">141</span> // more nodes<a name="line.141"></a>
+<span class="sourceLineNo">142</span> new int[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},<a name="line.142"></a>
+<span class="sourceLineNo">143</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 10},<a name="line.143"></a>
+<span class="sourceLineNo">144</span> new int[]{6, 6, 5, 6, 6, 6, 6, 6, 6, 1},<a name="line.144"></a>
+<span class="sourceLineNo">145</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 54},<a name="line.145"></a>
+<span class="sourceLineNo">146</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 55},<a name="line.146"></a>
+<span class="sourceLineNo">147</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 56},<a name="line.147"></a>
+<span class="sourceLineNo">148</span> new int[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 16},<a name="line.148"></a>
+<span class="sourceLineNo">149</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 8},<a name="line.149"></a>
+<span class="sourceLineNo">150</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 9},<a name="line.150"></a>
+<span class="sourceLineNo">151</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 10},<a name="line.151"></a>
+<span class="sourceLineNo">152</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 123},<a name="line.152"></a>
+<span class="sourceLineNo">153</span> new int[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 155},<a name="line.153"></a>
+<span class="sourceLineNo">154</span> new int[]{10, 7, 12, 8, 11, 10, 9, 14},<a name="line.154"></a>
+<span class="sourceLineNo">155</span> new int[]{13, 14, 6, 10, 10, 10, 8, 10},<a name="line.155"></a>
+<span class="sourceLineNo">156</span> new int[]{130, 14, 60, 10, 100, 10, 80, 10},<a name="line.156"></a>
+<span class="sourceLineNo">157</span> new int[]{130, 140, 60, 100, 100, 100, 80, 100},<a name="line.157"></a>
+<span class="sourceLineNo">158</span> new int[]{0, 5 , 5, 5, 5},<a name="line.158"></a>
+<span class="sourceLineNo">159</span> largeCluster,<a name="line.159"></a>
+<span class="sourceLineNo">160</span><a name="line.160"></a>
+<span class="sourceLineNo">161</span> };<a name="line.161"></a>
+<span class="sourceLineNo">162</span><a name="line.162"></a>
+<span class="sourceLineNo">163</span><a name="line.163"></a>
+<span class="sourceLineNo">164</span> // This class is introduced because IP to rack resolution can be lengthy.<a name="line.164"></a>
+<span class="sourceLineNo">165</span> public static class MockMapping implements DNSToSwitchMapping {<a name="line.165"></a>
+<span class="sourceLineNo">166</span> public MockMapping(Configuration conf) {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> }<a name="line.167"></a>
+<span class="sourceLineNo">168</span><a name="line.168"></a>
+<span class="sourceLineNo">169</span> @Override<a name="line.169"></a>
+<span class="sourceLineNo">170</span> public List<String> resolve(List<String> names) {<a name="line.170"></a>
+<span class="sourceLineNo">171</span> return Stream.generate(() -> "rack").limit(names.size()).collect(Collectors.toList());<a name="line.171"></a>
+<span class="sourceLineNo">172</span> }<a name="line.172"></a>
+<span class="sourceLineNo">173</span><a name="line.173"></a>
+<span class="sourceLineNo">174</span> // do not add @Override annotations here. It mighty break compilation with earlier Hadoops<a name="line.174"></a>
+<span class="sourceLineNo">175</span> public void reloadCachedMappings() {<a name="line.175"></a>
+<span class="sourceLineNo">176</span> }<a name="line.176"></a>
+<span class="sourceLineNo">177</span><a name="line.177"></a>
+<span class="sourceLineNo">178</span> // do not add @Override annotations here. It mighty break compilation with earlier Hadoops<a name="line.178"></a>
+<span class="sourceLineNo">179</span> public void reloadCachedMappings(List<String> arg0) {<a name="line.179"></a>
+<span class="sourceLineNo">180</span> }<a name="line.180"></a>
+<span class="sourceLineNo">181</span> }<a name="line.181"></a>
+<span class="sourceLineNo">182</span><a name="line.182"></a>
+<span class="sourceLineNo">183</span> /**<a name="line.183"></a>
+<span class="sourceLineNo">184</span> * Invariant is that all servers have between floor(avg) and ceiling(avg)<a name="line.184"></a>
+<span class="sourceLineNo">185</span> * number of regions.<a name="line.185"></a>
+<span class="sourceLineNo">186</span> */<a name="line.186"></a>
+<span class="sourceLineNo">187</span> public void assertClusterAsBalanced(List<ServerAndLoad> servers) {<a name="line.187"></a>
+<span class="sourceLineNo">188</span> int numServers = servers.size();<a name="line.188"></a>
+<span class="sourceLineNo">189</span> int numRegions = 0;<a name="line.189"></a>
+<span class="sourceLineNo">190</span> int maxRegions = 0;<a name="line.190"></a>
+<span class="sourceLineNo">191</span> int minRegions = Integer.MAX_VALUE;<a name="line.191"></a>
+<span class="sourceLineNo">192</span> for (ServerAndLoad server : servers) {<a name="line.192"></a>
+<span class="sourceLineNo">193</span> int nr = server.getLoad();<a name="line.193"></a>
+<span class="sourceLineNo">194</span> if (nr > maxRegions) {<a name="line.194"></a>
+<span class="sourceLineNo">195</span> maxRegions = nr;<a name="line.195"></a>
<span class="sourceLineNo">196</span> }<a name="line.196"></a>
-<span class="sourceLineNo">197</span> numRegions += nr;<a name="line.197"></a>
-<span class="sourceLineNo">198</span> }<a name="line.198"></a>
-<span class="sourceLineNo">199</span> if (maxRegions - minRegions < 2) {<a name="line.199"></a>
-<span class="sourceLineNo">200</span> // less than 2 between max and min, can't balance<a name="line.200"></a>
-<span class="sourceLineNo">201</span> return;<a name="line.201"></a>
-<span class="sourceLineNo">202</span> }<a name="line.202"></a>
-<span class="sourceLineNo">203</span> int min = numRegions / numServers;<a name="line.203"></a>
-<span class="sourceLineNo">204</span> int max = numRegions % numServers == 0 ? min : min + 1;<a name="line.204"></a>
-<span class="sourceLineNo">205</span><a name="line.205"></a>
-<span class="sourceLineNo">206</span> for (ServerAndLoad server : servers) {<a name="line.206"></a>
-<span class="sourceLineNo">207</span> assertTrue(server.getLoad() >= 0);<a name="line.207"></a>
-<span class="sourceLineNo">208</span> assertTrue(server.getLoad() <= max);<a name="line.208"></a>
-<span class="sourceLineNo">209</span> assertTrue(server.getLoad() >= min);<a name="line.209"></a>
-<span class="sourceLineNo">210</span> }<a name="line.210"></a>
-<span class="sourceLineNo">211</span> }<a name="line.211"></a>
-<span class="sourceLineNo">212</span><a name="line.212"></a>
-<span class="sourceLineNo">213</span> /**<a name="line.213"></a>
-<span class="sourceLineNo">214</span> * Invariant is that all servers have between acceptable range<a name="line.214"></a>
-<span class="sourceLineNo">215</span> * number of regions.<a name="line.215"></a>
-<span class="sourceLineNo">216</span> */<a name="line.216"></a>
-<span class="sourceLineNo">217</span> public boolean assertClusterOverallAsBalanced(List<ServerAndLoad> servers, int tablenum) {<a name="line.217"></a>
-<span class="sourceLineNo">218</span> int numServers = servers.size();<a name="line.218"></a>
-<span class="sourceLineNo">219</span> int numRegions = 0;<a name="line.219"></a>
-<span class="sourceLineNo">220</span> int maxRegions = 0;<a name="line.220"></a>
-<span class="sourceLineNo">221</span> int minRegions = Integer.MAX_VALUE;<a name="line.221"></a>
-<span class="sourceLineNo">222</span> for (ServerAndLoad server : servers) {<a name="line.222"></a>
-<span class="sourceLineNo">223</span> int nr = server.getLoad();<a name="line.223"></a>
-<span class="sourceLineNo">224</span> if (nr > maxRegions) {<a name="line.224"></a>
-<span class="sourceLineNo">225</span> maxRegions = nr;<a name="line.225"></a>
-<span class="sourceLineNo">226</span> }<a name="line.226"></a>
-<span class="sourceLineNo">227</span> if (nr < minRegions) {<a name="line.227"></a>
-<span class="sourceLineNo">228</span> minRegions = nr;<a name="line.228"></a>
+<span class="sourceLineNo">197</span> if (nr < minRegions) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> minRegions = nr;<a name="line.198"></a>
+<span class="sourceLineNo">199</span> }<a name="line.199"></a>
+<span class="sourceLineNo">200</span> numRegions += nr;<a name="line.200"></a>
+<span class="sourceLineNo">201</span> }<a name="line.201"></a>
+<span class="sourceLineNo">202</span> if (maxRegions - minRegions < 2) {<a name="line.202"></a>
+<span class="sourceLineNo">203</span> // less than 2 between max and min, can't balance<a name="line.203"></a>
+<span class="sourceLineNo">204</span> return;<a name="line.204"></a>
+<span class="sourceLineNo">205</span> }<a name="line.205"></a>
+<span class="sourceLineNo">206</span> int min = numRegions / numServers;<a name="line.206"></a>
+<span class="sourceLineNo">207</span> int max = numRegions % numServers == 0 ? min : min + 1;<a name="line.207"></a>
+<span class="sourceLineNo">208</span><a name="line.208"></a>
+<span class="sourceLineNo">209</span> for (ServerAndLoad server : servers) {<a name="line.209"></a>
+<span class="sourceLineNo">210</span> assertTrue(server.getLoad() >= 0);<a name="line.210"></a>
+<span class="sourceLineNo">211</span> assertTrue(server.getLoad() <= max);<a name="line.211"></a>
+<span class="sourceLineNo">212</span> assertTrue(server.getLoad() >= min);<a name="line.212"></a>
+<span class="sourceLineNo">213</span> }<a name="line.213"></a>
+<span class="sourceLineNo">214</span> }<a name="line.214"></a>
+<span class="sourceLineNo">215</span><a name="line.215"></a>
+<span class="sourceLineNo">216</span> /**<a name="line.216"></a>
+<span class="sourceLineNo">217</span> * Invariant is that all servers have between acceptable range<a name="line.217"></a>
+<span class="sourceLineNo">218</span> * number of regions.<a name="line.218"></a>
+<span class="sourceLineNo">219</span> */<a name="line.219"></a>
+<span class="sourceLineNo">220</span> public boolean assertClusterOverallAsBalanced(List<ServerAndLoad> servers, int tablenum) {<a name="line.220"></a>
+<span class="sourceLineNo">221</span> int numServers = servers.size();<a name="line.221"></a>
+<span class="sourceLineNo">222</span> int numRegions = 0;<a name="line.222"></a>
+<span class="sourceLineNo">223</span> int maxRegions = 0;<a name="line.223"></a>
+<span class="sourceLineNo">224</span> int minRegions = Integer.MAX_VALUE;<a name="line.224"></a>
+<span class="sourceLineNo">225</span> for (ServerAndLoad server : servers) {<a name="line.225"></a>
+<span class="sourceLineNo">226</span> int nr = server.getLoad();<a name="line.226"></a>
+<span class="sourceLineNo">227</span> if (nr > maxRegions) {<a name="line.227"></a>
+<span class="sourceLineNo">228</span> maxRegions = nr;<a name="line.228"></a>
<span class="sourceLineNo">229</span> }<a name="line.229"></a>
-<span class="sourceLineNo">230</span> numRegions += nr;<a name="line.230"></a>
-<span class="sourceLineNo">231</span> }<a name="line.231"></a>
-<span class="sourceLineNo">232</span> if (maxRegions - minRegions < 2) {<a name="line.232"></a>
-<span class="sourceLineNo">233</span> // less than 2 between max and min, can't balance<a name="line.233"></a>
-<span class="sourceLineNo">234</span> return true;<a name="line.234"></a>
-<span class="sourceLineNo">235</span> }<a name="line.235"></a>
-<span class="sourceLineNo">236</span> int min = numRegions / numServers;<a name="line.236"></a>
-<span class="sourceLineNo">237</span> int max = numRegions % numServers == 0 ? min : min + 1;<a name="line.237"></a>
-<span class="sourceLineNo">238</span><a name="line.238"></a>
-<span class="sourceLineNo">239</span> for (ServerAndLoad server : servers) {<a name="line.239"></a>
-<span class="sourceLineNo">240</span> if (server.getLoad() < 0 || server.getLoad() > max + tablenum/2 + 1 || server.getLoad() < min - tablenum/2 - 1)<a name="line.240"></a>
-<span class="sourceLineNo">241</span> return false;<a name="line.241"></a>
-<span class="sourceLineNo">242</span> }<a name="line.242"></a>
-<span class="sourceLineNo">243</span> return true;<a name="line.243"></a>
-<span class="sourceLineNo">244</span> }<a name="line.244"></a>
-<span class="sourceLineNo">245</span><a name="line.245"></a>
-<span class="sourceLineNo">246</span> /**<a name="line.246"></a>
-<span class="sourceLineNo">247</span> * Checks whether region replicas are not hosted on the same host.<a name="line.247"></a>
-<span class="sourceLineNo">248</span> */<a name="line.248"></a>
-<span class="sourceLineNo">249</span> public void assertRegionReplicaPlacement(Map<ServerName, List<RegionInfo>> serverMap, RackManager rackManager) {<a name="line.249"></a>
-<span class="sourceLineNo">250</span> TreeMap<String, Set<RegionInfo>> regionsPerHost = new TreeMap<>();<a name="line.250"></a>
-<span class="sourceLineNo">251</span> TreeMap<String, Set<RegionInfo>> regionsPerRack = new TreeMap<>();<a name="line.251"></a>
-<span class="sourceLineNo">252</span><a name="line.252"></a>
-<span class="sourceLineNo">253</span> for (Entry<ServerName, List<RegionInfo>> entry : serverMap.entrySet()) {<a name="line.253"></a>
-<span class="sourceLineNo">254</span> String hostname = entry.getKey().getHostname();<a name="line.254"></a>
-<span class="sourceLineNo">255</span> Set<RegionInfo> infos = regionsPerHost.get(hostname);<a name="line.255"></a>
-<span class="sourceLineNo">256</span> if (infos == null) {<a name="line.256"></a>
-<span class="sourceLineNo">257</span> infos = new HashSet<>();<a name="line.257"></a>
-<span class="sourceLineNo">258</span> regionsPerHost.put(hostname, infos);<a name="line.258"></a>
-<span class="sourceLineNo">259</span> }<a name="line.259"></a>
-<span class="sourceLineNo">260</span><a name="line.260"></a>
-<span class="sourceLineNo">261</span> for (RegionInfo info : entry.getValue()) {<a name="line.261"></a>
-<span class="sourceLineNo">262</span> RegionInfo primaryInfo = RegionReplicaUtil.getRegionInfoForDefaultReplica(info);<a name="line.262"></a>
-<span class="sourceLineNo">263</span> if (!infos.add(primaryInfo)) {<a name="line.263"></a>
-<span class="sourceLineNo">264</span> Assert.fail("Two or more region replicas are hosted on the same host after balance");<a name="line.264"></a>
-<span class="sourceLineNo">265</span> }<a name="line.265"></a>
-<span class="sourceLineNo">266</span> }<a name="line.266"></a>
-<span class="sourceLineNo">267</span> }<a name="line.267"></a>
-<span class="sourceLineNo">268</span><a name="line.268"></a>
-<span class="sourceLineNo">269</span> if (rackManager == null) {<a name="line.269"></a>
-<span class="sourceLineNo">270</span> return;<a name="line.270"></a>
-<span class="sourceLineNo">271</span> }<a name="line.271"></a>
-<span class="sourceLineNo">272</span><a name="line.272"></a>
-<span class="sourceLineNo">273</span> for (Entry<ServerName, List<RegionInfo>> entry : serverMap.entrySet()) {<a name="line.273"></a>
-<span class="sourceLineNo">274</span> String rack = rackManager.getRack(entry.getKey());<a name="line.274"></a>
-<span class="sourceLineNo">275</span> Set<RegionInfo> infos = regionsPerRack.get(rack);<a name="line.275"></a>
-<span class="sourceLineNo">276</span> if (infos == null) {<a name="line.276"></a>
-<span class="sourceLineNo">277</span> infos = new HashSet<>();<a name="line.277"></a>
-<span class="sourceLineNo">278</span> regionsPerRack.put(rack, infos);<a name="line.278"></a>
-<span class="sourceLineNo">279</span> }<a name="line.279"></a>
-<span class="sourceLineNo">280</span><a name="line.280"></a>
-<span class="sourceLineNo">281</span> for (RegionInfo info : entry.getValue()) {<a name="line.281"></a>
-<span class="sourceLineNo">282</span> RegionInfo primaryInfo = RegionReplicaUtil.getRegionInfoForDefaultReplica(info);<a name="line.282"></a>
-<span class="sourceLineNo">283</span> if (!infos.add(primaryInfo)) {<a name="line.283"></a>
-<span class="sourceLineNo">284</span> Assert.fail("Two or more region replicas are hosted on the same rack after balance");<a name="line.284"></a>
-<span class="sourceLineNo">285</span> }<a name="line.285"></a>
-<span class="sourceLineNo">286</span> }<a name="line.286"></a>
-<span class="sourceLineNo">287</span> }<a name="line.287"></a>
-<span class="sourceLineNo">288</span> }<a name="line.288"></a>
-<span class="sourceLineNo">289</span><a name="line.289"></a>
-<span class="sourceLineNo">290</span> protected String printStats(List<ServerAndLoad> servers) {<a name="line.290"></a>
-<span class="sourceLineNo">291</span> int numServers = servers.size();<a name="line.291"></a>
-<span class="sourceLineNo">292</span> int totalRegions = 0;<a name="line.292"></a>
-<span class="sourceLineNo">293</span> for (ServerAndLoad server : servers) {<a name="line.293"></a>
-<span class="sourceLineNo">294</span> totalRegions += server.getLoad();<a name="line.294"></a>
-<span class="sourceLineNo">295</span> }<a name="line.295"></a>
-<span class="sourceLineNo">296</span> float average = (float) totalRegions / numServers;<a name="line.296"></a>
-<span class="sourceLineNo">297</span> int max = (int) Math.ceil(average);<a name="line.297"></a>
-<span class="sourceLineNo">298</span> int min = (int) Math.floor(average);<a name="line.298"></a>
-<span class="sourceLineNo">299</span> return "[srvr=" + numServers + " rgns=" + totalRegions + " avg=" + average + " max=" + max<a name="line.299"></a>
-<span class="sourceLineNo">300</span> + " min=" + min + "]";<a name="line.300"></a>
-<span class="sourceLineNo">301</span> }<a name="line.301"></a>
-<span class="sourceLineNo">302</span><a name="line.302"></a>
-<span class="sourceLineNo">303</span> protected List<ServerAndLoad> convertToList(final Map<ServerName, List<RegionInfo>> servers) {<a name="line.303"></a>
-<span class="sourceLineNo">304</span> List<ServerAndLoad> list = new ArrayList<>(servers.size());<a name="line.304"></a>
-<span class="sourceLineNo">305</span> for (Map.Entry<ServerName, List<RegionInfo>> e : servers.entrySet()) {<a name="line.305"></a>
-<span class="sourceLineNo">306</span> list.add(new ServerAndLoad(e.getKey(), e.getValue().size()));<a name="line.306"></a>
-<span class="sourceLineNo">307</span> }<a name="line.307"></a>
-<span class="sourceLineNo">308</span> return list;<a name="line.308"></a>
-<span class="sourceLineNo">309</span> }<a name="line.309"></a>
-<span class="sourceLineNo">310</span><a name="line.310"></a>
-<span class="sourceLineNo">311</span> protected String printMock(List<ServerAndLoad> balancedCluster) {<a name="line.311"></a>
-<span class="sourceLineNo">312</span> SortedSet<ServerAndLoad> sorted = new TreeSet<>(balancedCluster);<a name="line.312"></a>
-<span class="sourceLineNo">313</span> ServerAndLoad[] arr = sorted.toArray(new ServerAndLoad[sorted.size()]);<a name="line.313"></a>
-<span class="sourceLineNo">314</span> StringBuilder sb = new StringBuilder(sorted.size() * 4 + 4);<a name="line.314"></a>
-<span class="sourceLineNo">315</span> sb.append("{ ");<a name="line.315"></a>
-<span class="sourceLineNo">316</span> for (int i = 0; i < arr.length; i++) {<a name="line.316"></a>
-<span class="sourceLineNo">317</span> if (i != 0) {<a name="line.317"></a>
-<span class="sourceLineNo">318</span> sb.append(" , ");<a name="line.318"></a>
-<span class="sourceLineNo">319</span> }<a name="line.319"></a>
-<span class="sourceLineNo">320</span> sb.append(arr[i].getServerName().getHostname());<a name="line.320"></a>
-<span class="sourceLineNo">321</span> sb.append(":");<a name="line.321"></a>
-<span class="sourceLineNo">322</span> sb.append(arr[i].getLoad());<a name="line.322"></a>
-<span class="sourceLineNo">323</span> }<a name="line.323"></a>
-<span class="sourceLineNo">324</span> sb.append(" }");<a name="line.324"></a>
-<span class="sourceLineNo">325</span> return sb.toString();<a name="line.325"></a>
-<span class="sourceLineNo">326</span> }<a name="line.326"></a>
-<span class="sourceLineNo">327</span><a name="line.327"></a>
-<span class="sourceLineNo">328</span> /**<a name="line.328"></a>
-<span class="sourceLineNo">329</span> * This assumes the RegionPlan HSI instances are the same ones in the map, so<a name="line.329"></a>
-<span class="sourceLineNo">330</span> * actually no need to even pass in the map, but I think it's clearer.<a name="line.330"></a>
-<span class="sourceLineNo">331</span> *<a name="line.331"></a>
-<span class="sourceLineNo">332</span> * @param list<a name="line.332"></a>
-<span class="sourceLineNo">333</span> * @param plans<a name="line.333"></a>
-<span class="sourceLineNo">334</span> * @return<a name="line.334"></a>
-<span class="sourceLineNo">335</span> */<a name="line.335"></a>
-<span class="sourceLineNo">336</span> protected List<ServerAndLoad> reconcile(List<ServerAndLoad> list,<a name="line.336"></a>
-<span class="sourceLineNo">337</span> List<RegionPlan> plans,<a name="line.337"></a>
-<span class="sourceLineNo">338</span> Map<ServerName, List<RegionInfo>> servers) {<a name="line.338"></a>
-<span class="sourceLineNo">339</span> List<ServerAndLoad> result = new ArrayList<>(list.size());<a name="line.339"></a>
-<span class="sourceLineNo">340</span><a name="line.340"></a>
-<span class="sourceLineNo">341</span> Map<ServerName, ServerAndLoad> map = new HashMap<>(list.size());<a name="line.341"></a>
-<span class="sourceLineNo">342</span> for (ServerAndLoad sl : list) {<a name="line.342"></a>
-<span class="sourceLineNo">343</span> map.put(sl.getServerName(), sl);<a name="line.343"></a>
-<span class="sourceLineNo">344</span> }<a name="line.344"></a>
-<span class="sourceLineNo">345</span> if (plans != null) {<a name="line.345"></a>
-<span class="sourceLineNo">346</span> for (RegionPlan plan : plans) {<a name="line.346"></a>
-<span class="sourceLineNo">347</span> ServerName source = plan.getSource();<a name="line.347"></a>
-<span class="sourceLineNo">348</span><a name="line.348"></a>
-<span class="sourceLineNo">349</span> updateLoad(map, source, -1);<a name="line.349"></a>
-<span class="sourceLineNo">350</span> ServerName destination = plan.getDestination();<a name="line.350"></a>
-<span class="sourceLineNo">351</span> updateLoad(map, destination, +1);<a name="line.351"></a>
-<span class="sourceLineNo">352</span><a name="line.352"></a>
-<span class="sourceLineNo">353</span> servers.get(source).remove(plan.getRegionInfo());<a name="line.353"></a>
-<span class="sourceLineNo">354</span> servers.get(destination).add(plan.getRegionInfo());<a name="line.354"></a>
-<span class="sourceLineNo">355</span> }<a name="line.355"></a>
-<span class="sourceLineNo">356</span> }<a name="line.356"></a>
-<span class="sourceLineNo">357</span> result.clear();<a name="line.357"></a>
-<span class="sourceLineNo">358</span> result.addAll(map.values());<a name="line.358"></a>
-<span class="sourceLineNo">359</span> return result;<a name="line.359"></a>
-<span class="sourceLineNo">360</span> }<a name="line.360"></a>
-<span class="sourceLineNo">361</span><a name="line.361"></a>
-<span class="sourceLineNo">362</span> protected void updateLoad(final Map<ServerName, ServerAndLoad> map,<a name="line.362"></a>
-<span class="sourceLineNo">363</span> final ServerName sn,<a name="line.363"></a>
-<span class="sourceLineNo">364</span> final int diff) {<a name="line.364"></a>
-<span class="sourceLineNo">365</span> ServerAndLoad sal = map.get(sn);<a name="line.365"></a>
-<span class="sourceLineNo">366</span> if (sal == null) sal = new ServerAndLoad(sn, 0);<a name="line.366"></a>
-<span class="sourceLineNo">367</span> sal = new ServerAndLoad(sn, sal.getLoad() + diff);<a name="line.367"></a>
-<span class="sourceLineNo">368</span> map.put(sn, sal);<a name="line.368"></a>
-<span class="sourceLineNo">369</span> }<a name="line.369"></a>
-<span class="sourceLineNo">370</span><a name="line.370"></a>
-<span class="sourceLineNo">371</span> protected TreeMap<ServerName, List<RegionInfo>> mockClusterServers(int[] mockCluster) {<a name="line.371"></a>
-<span class="sourceLineNo">372</span> return mockClusterServers(mockCluster, -1);<a name="line.372"></a>
-<span class="sourceLineNo">373</span> }<a name="line.373"></a>
-<span class="sourceLineNo">374</span><a name="line.374"></a>
-<span class="sourceLineNo">375</span> protected BaseLoadBalancer.Cluster mockCluster(int[] mockCluster) {<a name="line.375"></a>
-<span class="sourceLineNo">376</span> return new BaseLoadBalancer.Cluster(<a name="line.376"></a>
-<span class="sourceLineNo">377</span> mockClusterServers(mockCluster, -1), null, null, null);<a name="line.377"></a>
-<span class="sourceLineNo">378</span> }<a name="line.378"></a>
-<span class="sourceLineNo">379</span><a name="line.379"></a>
-<span class="sourceLineNo">380</span> protected TreeMap<ServerName, List<RegionInfo>> mockClusterServers(int[] mockCluster, int numTables) {<a name="line.380"></a>
-<span class="sourceLineNo">381</span> int numServers = mockCluster.length;<a name="line.381"></a>
-<span class="sourceLineNo">382</span> TreeMap<ServerName, List<RegionInfo>> servers = new TreeMap<>();<a name="line.382"></a>
-<span class="sourceLineNo">383</span> for (int i = 0; i < numServers; i++) {<a name="line.383"></a>
-<span class="sourceLineNo">384</span> int numRegions = mockCluster[i];<a name="line.384"></a>
-<span class="sourceLineNo">385</span> ServerAndLoad sal = randomServer(0);<a name="line.385"></a>
-<span class="sourceLineNo">386</span> List<RegionInfo> regions = randomRegions(numRegions, numTables);<a name="line.386"></a>
-<span class="sourceLineNo">387</span> servers.put(sal.getServerName(), regions);<a name="line.387"></a>
-<span class="sourceLineNo">388</span> }<a name="line.388"></a>
-<span class="sourceLineNo">389</span> return servers;<a name="line.389"></a>
-<span class="sourceLineNo">390</span> }<a name="line.390"></a>
-<span class="sourceLineNo">391</span><a name="line.391"></a>
-<span class="sourceLineNo">392</span> protected TreeMap<ServerName, List<RegionInfo>> mockUniformClusterServers(int[] mockCluster) {<a name="line.392"></a>
-<span class="sourceLineNo">393</span> int numServers = mockCluster.length;<a name="line.393"></a>
-<span class="sourceLineNo">394</span> TreeMap<ServerName, List<RegionInfo>> servers = new TreeMap<>();<a name="line.394"></a>
-<span class="sourceLineNo">395</span> for (int i = 0; i < numServers; i++) {<a name="line.395"></a>
-<span class="sourceLineNo">396</span> int numRegions = mockCluster[i];<a name="line.396"></a>
-<span class="sourceLineNo">397</span> ServerAndLoad sal = randomServer(0);<a name="line.397"></a>
-<span class="sourceLineNo">398</span> List<RegionInfo> regions = uniformRegions(numRegions);<a name="line.398"></a>
-<span class="sourceLineNo">399</span> servers.put(sal.getServerName(), regions);<a name="line.399"></a>
-<span class="sourceLineNo">400</span> }<a name="line.400"></a>
-<span class="sourceLineNo">401</span> return servers;<a name="line.401"></a>
-<span class="sourceLineNo">402</span> }<a name="line.402"></a>
-<span class="sourceLineNo">403</span><a name="line.403"></a>
-<span class="sourceLineNo">404</span> protected HashMap<TableName, TreeMap<ServerName, List<RegionInfo>>> mockClusterServersWithTables(Map<ServerName, List<RegionInfo>> clusterServers) {<a name="line.404"></a>
-<span class="sourceLineNo">405</span> HashMap<TableName, TreeMap<ServerName, List<RegionInfo>>> result = new HashMap<>();<a name="line.405"></a>
-<span class="sourceLineNo">406</span> for (Map.Entry<ServerName, List<RegionInfo>> entry : clusterServers.entrySet()) {<a name="line.406"></a>
-<span class="sourceLineNo">407</span> ServerName sal = entry.getKey();<a name="line.407"></a>
-<span class="sourceLineNo">408</span> List<RegionInfo> regions = entry.getValue();<a name="line.408"></a>
-<span class="sourceLineNo">409</span> for (RegionInfo hri : regions){<a name="line.409"></a>
-<span class="sourceLineNo">410</span> TreeMap<ServerName, List<RegionInfo>> servers = result.get(hri.getTable());<a name="line.410"></a>
-<span class="sourceLineNo">411</span> if (servers == null) {<a name="line.411"></a>
-<span class="sourceLineNo">412</span> servers = new TreeMap<>();<a name="line.412"></a>
-<span class="sourceLineNo">413</span> result.put(hri.getTable(), servers);<a name="line.413"></a>
-<span class="sourceLineNo">414</span> }<a name="line.414"></a>
-<span class="sourceLineNo">415</span> List<RegionInfo> hrilist = servers.get(sal);<a name="line.415"></a>
-<span class="sourceLineNo">416</span> if (hrilist == null) {<a name="line.416"></a>
-<span class="sourceLineNo">417</span> hrilist = new ArrayList<>();<a name="line.417"></a>
-<span class="sourceLineNo">418</span> servers.put(sal, hrilist);<a name="line.418"></a>
-<span class="sourceLineNo">419</span> }<a name="line.419"></a>
-<span class="sourceLineNo">420</span> hrilist.add(hri);<a name="line.420"></a>
-<span class="sourceLineNo">421</span> }<a name="line.421"></a>
-<span class="sourceLineNo">422</span> }<a name="line.422"></a>
-<span class="sourceLineNo">423</span> for(Map.Entry<TableName, TreeMap<ServerName, List<RegionInfo>>> entry : result.entrySet()){<a name="line.423"></a>
-<span class="sourceLineNo">424</span> for(ServerName srn : clusterServers.keySet()){<a name="line.424"></a>
-<span class="sourceLineNo">425</span> if (!entry.getValue().containsKey(srn)) entry.getValue().put(srn, new ArrayList<>());<a name="line.425"></a>
-<span class="sourceLineNo">426</span> }<a name="line.426"></a>
-<span class="sourceLineNo">427</span> }<a name="line.427"></a>
-<span class="sourceLineNo">428</span> return result;<a name="line.428"></a>
-<span class="sourceLineNo">429</span> }<a name="line.429"></a>
-<span class="sourceLineNo">430</span><a name="line.430"></a>
-<span class="sourceLineNo">431</span> private Queue<RegionInfo> regionQueue = new LinkedList<>();<a name="line.431"></a>
-<span class="sourceLineNo">432</span><a name="line.432"></a>
-<span class="sourceLineNo">433</span> protected List<RegionInfo> randomRegions(int numRegions) {<a name="line.433"></a>
-<span class="sourceLineNo">434</span> return randomRegions(numRegions, -1);<a name="line.434"></a>
-<span class="sourceLineNo">435</span> }<a name="line.435"></a>
-<span class="sourceLineNo">436</span><a name="line.436"></a>
-<span class="sourceLineNo">437</span> protected List<RegionInfo> randomRegions(int numRegions, int numTables) {<a name="line.437"></a>
-<span class="sourceLineNo">438</span> List<RegionInfo> regions = new ArrayList<>(numRegions);<a name="line.438"></a>
-<span class="sourceLineNo">439</span> byte[] start = new byte[16];<a name="line.439"></a>
-<span class="sourceLineNo">440</span> byte[] end = new byte[16];<a name="line.440"></a>
-<span class="sourceLineNo">441</span> rand.nextBytes(start);<a name="line.441"></a>
-<span class="sourceLineNo">442</span> rand.nextBytes(end);<a name="line.442"></a>
-<span class="sourceLineNo">443</span> for (int i = 0; i < numRegions; i++) {<a name="line.443"></a>
-<span class="sourceLineNo">444</span> if (!regionQueue.isEmpty()) {<a name="line.444"></a>
-<span class="sourceLineNo">445</span> regions.add(regionQueue.poll());<a name="line.445"></a>
-<span class="sourceLineNo">446</span> continue;<a name="line.446"></a>
-<span class="sourceLineNo">447</span> }<a name="line.447"></a>
-<span class="sourceLineNo">448</span> Bytes.putInt(start, 0, numRegions << 1);<a name="line.448"></a>
-<span class="sourceLineNo">449</span> Bytes.putInt(end, 0, (numRegions << 1) + 1);<a name="line.449"></a>
-<span class="sourceLineNo">450</span> TableName tableName =<a name="line.450"></a>
-<span class="sourceLineNo">451</span> TableName.valueOf("table" + (numTables > 0 ? rand.nextInt(numTables) : i));<a name="line.451"></a>
-<span class="sourceLineNo">452</span> RegionInfo hri = RegionInfoBuilder.newBuilder(tableName)<a name="line.452"></a>
-<span class="sourceLineNo">453</span> .setStartKey(start)<a name="line.453"></a>
-<span class="sourceLineNo">454</span> .setEndKey(end)<a name="line.454"></a>
-<span class="sourceLineNo">455</span> .setSplit(false)<a name="line.455"></a>
-<span class="sourceLineNo">456</span> .setRegionId(regionId++)<a name="line.456"></a>
-<span class="sourceLineNo">457</span> .build();<a name="line.457"></a>
-<span class="sourceLineNo">458</span> regions.add(hri);<a name="line.458"></a>
-<span class="sourceLineNo">459</span> }<a name="line.459"></a>
-<span class="sourceLineNo">460</span> return regions;<a name="line.460"></a>
-<span class="sourceLineNo">461</span> }<a name="line.461"></a>
-<span class="sourceLineNo">462</span><a name="line.462"></a>
-<span class="sourceLineNo">463</span> protected List<RegionInfo> uniformRegions(int numRegions) {<a name="line.463"></a>
-<span class="sourceLineNo">464</span> List<RegionInfo> regions = new ArrayList<>(numRegions);<a name="line.464"></a>
-<span class="sourceLineNo">465</span> byte[] start = new byte[16];<a name="line.465"></a>
-<span class="sourceLineNo">466</span> byte[] end = new byte[16];<a name="line.466"></a>
-<span class="sourceLineNo">467</span> rand.nextBytes(start);<a name="line.467"></a>
-<span class="sourceLineNo">468</span> rand.nextBytes(end);<a name="line.468"></a>
-<span class="sourceLineNo">469</span> for (int i = 0; i < numRegions; i++) {<a name="line.469"></a>
-<span class="sourceLineNo">470</span> Bytes.putInt(start, 0, numRegions << 1);<a name="line.470"></a>
-<span class="sourceLineNo">471</span> Bytes.putInt(end, 0, (numRegions << 1) + 1);<a name="line.471"></a>
-<span class="sourceLineNo">472</span> TableName tableName =<a name="line.472"></a>
-<span class="sourceLineNo">473</span> TableName.valueOf("table" + i);<a name="line.473"></a>
-<span class="sourceLineNo">474</span> RegionInfo hri = RegionInfoBuilder.newBuilder(tableName)<a name="line.474"></a>
-<span class="sourceLineNo">475</span> .setStartKey(start)<a name="line.475"></a>
-<span class="sourceLineNo">476</span> .setEndKey(end)<a name="line.476"></a>
-<span class="sourceLineNo">477</span> .setSplit(false)<a name="line.477"></a>
-<span class="sourceLineNo">478</span> .build();<a name="line.478"></a>
-<span class="sourceLineNo">479</span> regions.add(hri);<a name="line.479"></a>
-<span class="sourceLineNo">480</span> }<a name="line.480"></a>
-<span class="sourceLineNo">481</span> return regions;<a name="line.481"></a>
-<span class="sourceLineNo">482</span> }<a name="line.482"></a>
-<span class="sourceLineNo">483</span><a name="line.483"></a>
-<span class="sourceLineNo">484</span> protected void returnRegions(List<RegionInfo> regions) {<a name="line.484"></a>
-<span class="sourceLineNo">485</span> regionQueue.addAll(regions);<a name="line.485"></a>
-<span class="sourceLineNo">486</span> }<a name="line.486"></a>
-<span class="sourceLineNo">487</span><a name="line.487"></a>
-<span class="sourceLineNo">488</span> private Queue<ServerName> serverQueue = new LinkedList<>();<a name="line.488"></a>
-<span class="sourceLineNo">489</span><a name="line.489"></a>
-<span class="sourceLineNo">490</span> protected ServerAndLoad randomServer(final int numRegionsPerServer) {<a name="line.490"></a>
-<span class="sourceLineNo">491</span> if (!this.serverQueue.isEmpty()) {<a name="line.491"></a>
-<span class="sourceLineNo">492</span> ServerName sn = this.serverQueue.poll();<a name="line.492"></a>
-<span class="sourceLineNo">493</span> return new ServerAndLoad(sn, numRegionsPerServer);<a name="line.493"></a>
-<span class="sourceLineNo">494</span> }<a name="line.494"></a>
-<span class="sourceLineNo">495</span> String host = "srv" + rand.nextInt(Integer.MAX_VALUE);<a name="line.495"></a>
-<span class="sourceLineNo">496</span> int port = rand.nextInt(60000);<a name="line.496"></a>
-<span class="sourceLineNo">497</span> long startCode = rand.nextLong();<a name="line.497"></a>
-<span class="sourceLineNo">498</span> ServerName sn = ServerName.valueOf(host, port, startCode);<a name="line.498"></a>
-<span class="sourceLineNo">499</span> return new ServerAndLoad(sn, numRegionsPerServer);<a name="line.499"></a>
-<span class="sourceLineNo">500</span> }<a name="line.500"></a>
-<span class="sourceLineNo">501</span><a name="line.501"></a>
-<span class="sourceLineNo">502</span> protected List<ServerAndLoad> randomServers(int numServers, int numRegionsPerServer) {<a name="line.502"></a>
-<span class="sourceLineNo">503</span> List<ServerAndLoad> servers = new ArrayList<>(numServers);<a name="line.503"></a>
-<span class="sourceLineNo">504</span> for (int i = 0; i < numServers; i++) {<a name="line.504"></a>
-<span class="sourceLineNo">505</span> servers.add(randomServer(numRegionsPerServer));<a name="line.505"></a>
-<span class="sourceLineNo">506</span> }<a name="line.506"></a>
-<span class="sourceLineNo">507</span> return servers;<a name="line.507"></a>
-<span class="sourceLineNo">508</span> }<a name="line.508"></a>
-<span class="sourceLineNo">509</span><a name="line.509"></a>
-<span class="sourceLineNo">510</span> protected void returnServer(ServerName server) {<a name="line.510"></a>
-<span class="sourceLineNo">511</span> serverQueue.add(server);<a name="line.511"></a>
-<span class="sourceLineNo">512</span> }<a name="line.512"></a>
-<span class="sourceLineNo">513</span><a name="line.513"></a>
-<span class="sourceLineNo">514</span> protected void returnServers(List<ServerName> servers) {<a name="line.514"></a>
-<span class="sourceLineNo">515</span> this.serverQueue.addAll(servers);<a name="line.515"></a>
-<span class="sourceLineNo">516</span> }<a name="line.516"></a>
-<span class="sourceLineNo">517</span><a name="line.517"></a>
-<span class="sourceLineNo">518</span> protected void testWithCluster(int numNodes,<a name="line.518"></a>
-<span class="sourceLineNo">519</span> int numRegions,<a name="line.519"></a>
-<span class="sourceLineNo">520</span> int numRegionsPerServer,<a name="line.520"></a>
-<span class="sourceLineNo">521</span> int replication,<a name="line.521"></a>
-<span class="sourceLineNo">522</span> int numTables,<a name="line.522"></a>
-<span class="sourceLineNo">523</span> boolean assertFullyBalanced, boolean assertFullyBalancedForReplicas) {<a name="line.523"></a>
-<span class="sourceLineNo">524</span> Map<ServerName, List<RegionInfo>> serverMap =<a name="line.524"></a>
-<span class="sourceLineNo">525</span> createServerMap(numNodes, numRegions, numRegionsPerServer, replication, numTables);<a name="line.525"></a>
-<span class="sourceLineNo">526</span> testWithCluster(serverMap, null, assertFullyBalanced, assertFullyBalancedForReplicas);<a name="line.526"></a>
-<span class="sourceLineNo">527</span> }<a name="line.527"></a>
-<span class="sourceLineNo">528</span><a name="line.528"></a>
-<span class="sourceLineNo">529</span> protected void testWithCluster(Map<ServerName, List<RegionInfo>> serverMap,<a name="line.529"></a>
-<span class="sourceLineNo">530</span> RackManager rackManager, boolean assertFullyBalanced, boolean assertFullyBalancedForReplicas) {<a name="line.530"></a>
-<span class="sourceLineNo">531</span> List<ServerAndLoad> list = convertToList(serverMap);<a name="line.531"></a>
-<span class="sourceLineNo">532</span> LOG.info("Mock Cluster : " + printMock(list) + " " + printStats(list));<a name="line.532"></a>
-<span class="sourceLineNo">533</span><a name="line.533"></a>
-<span class="sourceLineNo">534</span> loadBalancer.setRackManager(rackManager);<a name="line.534"></a>
-<span class="sourceLineNo">535</span> // Run the balancer.<a name="line.535"></a>
-<span class="sourceLineNo">536</span> List<RegionPlan> plans = loadBalancer.balanceCluster(serverMap);<a name="line.536"></a>
-<span class="sourceLineNo">537</span> assertNotNull(plans);<a name="line.537"></a>
-<span class="sourceLineNo">538</span><a name="line.538"></a>
-<span class="sourceLineNo">539</span> // Check to see that this actually got to a stable place.<a name="line.539"></a>
-<span class="sourceLineNo">540</span> if (assertFullyBalanced || assertFullyBalancedForReplicas) {<a name="line.540"></a>
-<span class="sourceLineNo">541</span> // Apply the plan to the mock cluster.<a name="line.541"></a>
-<span class="sourceLineNo">542</span> List<ServerAndLoad> balancedCluster = reconcile(list, plans, serverMap);<a name="line.542"></a>
-<span class="sourceLineNo">543</span><a name="line.543"></a>
-<span class="sourceLineNo">544</span> // Print out the cluster loads to make debugging easier.<a name="line.544"></a>
-<span class="sourceLineNo">545</span> LOG.info("Mock Balance : " + printMock(balancedCluster));<a name="line.545"></a>
-<span class="sourceLineNo">546</span><a name="line.546"></a>
-<span class="sourceLineNo">547</span> if (assertFullyBalanced) {<a name="line.547"></a>
-<span class="sourceLineNo">548</span> assertClusterAsBalanced(balancedCluster);<a name="line.548"></a>
-<span class="sourceLineNo">549</span> List<RegionPlan> secondPlans = loadBalancer.balanceCluster(serverMap);<a name="line.549"></a>
-<span class="sourceLineNo">550</span> assertNull(secondPlans);<a name="line.550"></a>
-<span class="sourceLineNo">551</span> }<a name="line.551"></a>
+<span class="sourceLineNo">230</span> if (nr < minRegions) {<a name="line.230"></a>
+<span class="sourceLineNo">231</span> minRegions = nr;<a name="line.231"></a>
+<span class="sourceLineNo">232</span> }<a name="line.232"></a>
+<span class="sourceLineNo">233</span> numRegions += nr;<a name="line.233"></a>
+<span class="sourceLineNo">234</span> }<a name="line.234"></a>
+<span class="sourceLineNo">235</span> if (maxRegions - minRegions < 2) {<a name="line.235"></a>
+<span class="sourceLineNo">236</span> // less than 2 between max and min, can't balance<a name="line.236"></a>
+<span class="sourceLineNo">237</span> return true;<a name="line.237"></a>
+<span class="sourceLineNo">238</span> }<a name="line.238"></a>
+<span class="sourceLineNo">239</span> int min = numRegions / numServers;<a name="line.239"></a>
+<span class="sourceLineNo">240</span> int max = numRegions % numServers == 0 ? min : min + 1;<a name="line.240"></a>
+<span class="sourceLineNo">241</span><a name="line.241"></a>
+<span class="sourceLineNo">242</span> for (ServerAndLoad server : servers) {<a name="line.242"></a>
+<span class="sourceLineNo">243</span> if (server.getLoad() < 0 || server.getLoad() > max + tablenum/2 + 1 || server.getLoad() < min - tablenum/2 - 1)<a name="line.243"></a>
+<span class="sourceLineNo">244</span> return false;<a name="line.244"></a>
+<span class="sourceLineNo">245</span> }<a name="line.245"></a>
+<span class="sourceLineNo">246</span> return true;<a name="line.246"></a>
+<span class="sourceLineNo">247</span> }<a name="line.247"></a>
+<span class="sourceLineNo">248</span><a name="line.248"></a>
+<span class="sourceLineNo">249</span> /**<a name="line.249"></a>
+<span class="sourceLineNo">250</span> * Checks whether region replicas are not hosted on the same host.<a name="line.250"></a>
+<span class="sourceLineNo">251</span> */<a name="line.251"></a>
+<span class="sourceLineNo">252</span> public void assertRegionReplicaPlacement(Map<ServerName, List<RegionInfo>> serverMap, RackManager rackManager) {<a name="line.252"></a>
+<span class="sourceLineNo">253</span> TreeMap<String, Set<RegionInfo>> regionsPerHost = new TreeMap<>();<a name="line.253"></a>
+<span class="sourceLineNo">254</span> TreeMap<String, Set<RegionInfo>> regionsPerRack = new TreeMap<>();<a name="line.254"></a>
+<span class="sourceLineNo">255</span><a name="line.255"></a>
+<span class="sourceLineNo">256</span> for (Entry<ServerName, List<RegionInfo>> entry : serverMap.entrySet()) {<a name="line.256"></a>
+<span class="sourceLineNo">257</span> String hostname = entry.getKey().getHostname();<a name="line.257"></a>
+<span class="sourceLineNo">258</span> Set<RegionInfo> infos = regionsPerHost.get(hostname);<a name="line.258"></a>
+<span class="sourceLineNo">259</span> if (infos == null) {<a name="line.259"></a>
+<span class="sourceLineNo">260</span> infos = new HashSet<>();<a name="line.260"></a>
+<span class="sourceLineNo">261</span> regionsPerHost.put(hostname, infos);<a name="line.261"></a>
+<span class="sourceLineNo">262</span> }<a name="line.262"></a>
+<span class="sourceLineNo">263</span><a name="line.263"></a>
+<span class="sourceLineNo">264</span> for (RegionInfo info : entry.getValue()) {<a name="line.264"></a>
+<span class="sourceLineNo">265</span> RegionInfo primaryInfo = RegionReplicaUtil.getRegionInfoForDefaultReplica(info);<a name="line.265"></a>
+<span class="sourceLineNo">266</span> if (!infos.add(primaryInfo)) {<a name="line.266"></a>
+<span class="sourceLineNo">267</span> Assert.fail("Two or more region replicas are hosted on the same host after balance");<a name="line.267"></a>
+<span class="sourceLineNo">268</span> }<a name="line.268"></a>
+<span class="sourceLineNo">269</span> }<a name="line.269"></a>
+<span class="sourceLineNo">270</span> }<a name="line.270"></a>
+<span class="sourceLineNo">271</span><a name="line.271"></a>
+<span class="sourceLineNo">272</span> if (rackManager == null) {<a name="line.272"></a>
+<span class="sourceLineNo">273</span> return;<a name="line.273"></a>
+<span class="sourceLineNo">274</span> }<a name="line.274"></a>
+<span class="sourceLineNo">275</span><a name="line.275"></a>
+<span class="sourceLineNo">276</span> for (Entry<ServerName, List<RegionInfo>> entry : serverMap.entrySet()) {<a name="line.276"></a>
+<span class="sourceLineNo">277</span> String rack = rackManager.getRack(entry.getKey());<a name="line.277"></a>
+<span class="sourceLineNo">278</span> Set<RegionInfo> infos = regionsPerRack.get(rack);<a name="line.278"></a>
+<span class="sourceLineNo">279</span> if (infos == null) {<a name="line.279"></a>
+<span class="sourceLineNo">280</span> infos = new HashSet<>();<a name="line.280"></a>
+<span class="sourceLineNo">281</span> regionsPerRack.put(rack, infos);<a name="line.281"></a>
+<span class="sourceLineNo">282</span> }<a name="line.282"></a>
+<span class="sourceLineNo">283</span><a name="line.283"></a>
+<span class="sourceLineNo">284</span> for (RegionInfo info : entry.getValue()) {<a name="line.284"></a>
+<span class="sourceLineNo">285</span> RegionInfo primaryInfo = RegionReplicaUtil.getRegionInfoForDefaultReplica(info);<a name="line.285"></a>
+<span class="sourceLineNo">286</span> if (!infos.add(primaryInfo)) {<a name="line.286"></a>
+<span class="sourceLineNo">287</span> Assert.fail("Two or more region replicas are hosted on the same rack after balance");<a name="line.287"></a>
+<span class="sourceLineNo">288</span> }<a name="line.288"></a>
+<span class="sourceLineNo">289</span> }<a name="line.289"></a>
+<span class="sourceLineNo">290</span> }<a name="line.290"></a>
+<span class="sourceLineNo">291</span> }<a name="line.291"></a>
+<span class="sourceLineNo">292</span><a name="line.292"></a>
+<span class="sourceLineNo">293</span> protected String printStats(List<ServerAndLoad> servers) {<a name="line.293"></a>
+<span class="sourceLineNo">294</span> int numServers = servers.size();<a name="line.294"></a>
+<span class="sourceLineNo">295</span> int totalRegions = 0;<a name="line.295"></a>
+<span class="sourceLineNo">296</span> for (ServerAndLoad server : servers) {<a name="line.296"></a>
+<span class="sourceLineNo">297</span> totalRegions += server.getLoad();<a name="line.297"></a>
+<span class="sourceLineNo">298</span> }<a name="line.298"></a>
+<span class="sourceLineNo">299</span> float average = (float) totalRegions / numServers;<a name="line.299"></a>
+<span class="sourceLineNo">300</span> int max = (int) Math.ceil(average);<a name="line.300"></a>
+<span class="sourceLineNo">301</span> int min = (int) Math.floor(average);<a name="line.301"></a>
+<span class="sourceLineNo">302</span> return "[srvr=" + numServers + " rgns=" + totalRegions + " avg=" + average + " max=" + max<a name="line.302"></a>
+<span class="sourceLineNo">303</span> + " min=" + min + "]";<a name="line.303"></a>
+<span class="sourceLineNo">304</span> }<a name="line.304"></a>
+<span class="sourceLineNo">305</span><a name="line.305"></a>
+<span class="sourceLineNo">306</span> protected List<ServerAndLoad> convertToList(final Map<ServerName, List<RegionInfo>> servers) {<a name="line.306"></a>
+<span class="sourceLineNo">307</span> List<ServerAndLoad> list = new ArrayList<>(servers.size());<a name="line.307"></a>
+<span class="sourceLineNo">308</span> for (Map.Entry<ServerName, List<RegionInfo>> e : servers.entrySet()) {<a name="line.308"></a>
+<span class="sourceLineNo">309</span> list.add(new ServerAndLoad(e.getKey(), e.getValue().size()));<a name="line.309"></a>
+<span class="sourceLineNo">310</span> }<a name="line.310"></a>
+<span class="sourceLineNo">311</span> return list;<a name="line.311"></a>
+<span class="sourceLineNo">312</span> }<a name="line.312"></a>
+<span class="sourceLineNo">313</span><a name="line.313"></a>
+<span class="sourceLineNo">314</span> protected String printMock(List<ServerAndLoad> balancedCluster) {<a name="line.314"></a>
+<span class="sourceLineNo">315</span> SortedSet<ServerAndLoad> sorted = new TreeSet<>(balancedCluster);<a name="line.315"></a>
+<span class="sourceLineNo">316</span> ServerAndLoad[] arr = sorted.toArray(new ServerAndLoad[sorted.size()]);<a name="line.316"></a>
+<span class="sourceLineNo">317</span> StringBuilder sb = new StringBuilder(sorted.size() * 4 + 4);<a name="line.317"></a>
+<span class="sourceLineNo">318</span> sb.append("{ ");<a name="line.318"></a>
+<span class="sourceLineNo">319</span> for (int i = 0; i < arr.length; i++) {<a name="line.319"></a>
+<span class="sourceLineNo">320</span> if (i != 0) {<a name="line.320"></a>
+<span class="sourceLineNo">321</span> sb.append(" , ");<a name="line.321"></a>
+<span class="sourceLineNo">322</span> }<a name="line.322"></a>
+<span class="sourceLineNo">323</span> sb.append(arr[i].getServerName().getHostname());<a name="line.323"></a>
+<span class="sourceLineNo">324</span> sb.append(":");<a name="line.324"></a>
+<span class="sourceLineNo">325</span> sb.append(arr[i].getLoad());<a name="line.325"></a>
+<span class="sourceLineNo">326</span> }<a name="line.326"></a>
+<span class="sourceLineNo">327</span> sb.append(" }");<a name="line.327"></a>
+<span class="sourceLineNo">328</span> return sb.toString();<a name="line.328"></a>
+<span class="sourceLineNo">329</span> }<a name="line.329"></a>
+<span class="sourceLineNo">330</span><a name="line.330"></a>
+<span class="sourceLineNo">331</span> /**<a name="line.331"></a>
+<span class="sourceLineNo">332</span> * This assumes the RegionPlan HSI instances are the same ones in the map, so<a name="line.332"></a>
+<span class="sourceLineNo">333</span> * actually no need to even pass in the map, but I think it's clearer.<a name="line.333"></a>
+<span class="sourceLineNo">334</span> *<a name="line.334"></a>
+<span class="sourceLineNo">335</span> * @param list<a name="line.335"></a>
+<span class="sourceLineNo">336</span> * @param plans<a name="line.336"></a>
+<span class="sourceLineNo">337</span> * @return<a name="line.337"></a>
+<span class="sourceLineNo">338</span> */<a name="line.338"></a>
+<span class="sourceLineNo">339</span> protected List<ServerAndLoad> reconcile(List<ServerAndLoad> list,<a name="line.339"></a>
+<span class="sourceLineNo">340</span> List<RegionPlan> plans,<a name="line.340"></a>
+<span class="sourceLineNo">341</span> Map<ServerName, List<RegionInfo>> servers) {<a name="line.341"></a>
+<span class="sourceLineNo">342</span> List<ServerAndLoad> result = new ArrayList<>(list.size());<a name="line.342"></a>
+<span class="sourceLineNo">343</span><a name="line.343"></a>
+<span class="sourceLineNo">344</span> Map<ServerName, ServerAndLoad> map = new HashMap<>(list.size());<a name="line.344"></a>
+<span class="sourceLineNo">345</span> for (ServerAndLoad sl : list) {<a name="line.345"></a>
+<span class="sourceLineNo">346</span> map.put(sl.getServerName(), sl);<a name="line.346"></a>
+<span class="sourceLineNo">347</span> }<a name="line.347"></a>
+<span class="sourceLineNo">348</span> if (plans != null) {<a name="line.348"></a>
+<span class="sourceLineNo">349</span> for (RegionPlan plan : plans) {<a name="line.349"></a>
+<span class="sourceLineNo">350</span> ServerName source = plan.getSource();<a name="line.350"></a>
+<span class="sourceLineNo">351</span><a name="line.351"></a>
+<span class="sourceLineNo">352</span> updateLoad(map, source, -1);<a name="line.352"></a>
+<span class="sourceLineNo">353</span> ServerName destination = plan.getDestination();<a name="line.353"></a>
+<span class="sourceLineNo">354</span> updateLoad(map, destination, +1);<a name="line.354"></a>
+<span class="sourceLineNo">355</span><a name="line.355"></a>
+<span class="sourceLineNo">356</span> servers.get(source).remove(plan.getRegionInfo());<a name="line.356"></a>
+<span class="sourceLineNo">357</span> servers.get(destination).add(plan.getRegionInfo());<a name="line.357"></a>
+<span class="sourceLineNo">358</span> }<a name="line.358"></a>
+<span class="sourceLineNo">359</span> }<a name="line.359"></a>
+<span class="sourceLineNo">360</span> result.clear();<a name="line.360"></a>
+<span class="sourceLineNo">361</span> result.addAll(map.values());<a name="line.361"></a>
+<span class="sourceLineNo">362</span> return result;<a name="line.362"></a>
+<span class="sourceLineNo">363</span> }<a name="line.363"></a>
+<span class="sourceLineNo">364</span><a name="line.364"></a>
+<span class="sourceLineNo">365</span> protected void updateLoad(final Map<ServerName, ServerAndLoad> map,<a name="line.365"></a>
+<span class="sourceLineNo">366</span> final ServerName sn,<a name="line.366"></a>
+<span class="sourceLineNo">367</span> final int diff) {<a name="line.367"></a>
+<span class="sourceLineNo">368</span> ServerAndLoad sal = map.get(sn);<a name="line.368"></a>
+<span class="sourceLineNo">369</span> if (sal == null) sal = new ServerAndLoad(sn, 0);<a name="line.369"></a>
+<span class="sourceLineNo">370</span> sal = new ServerAndLoad(sn, sal.getLoad() + diff);<a name="line.370"></a>
+<span class="sourceLineNo">371</span> map.put(sn, sal);<a name="line.371"></a>
+<span class="sourceLineNo">372</span> }<a name="line.372"></a>
+<span class="sourceLineNo">373</span><a name="line.373"></a>
+<span class="sourceLineNo">374</span> protected TreeMap<ServerName, List<RegionInfo>> mockClusterServers(int[] mockCluster) {<a name="line.374"></a>
+<span class="sourceLineNo">375</span> return mockClusterServers(mockCluster, -1);<a name="line.375"></a>
+<span class="sourceLineNo">376</span> }<a name="line.376"></a>
+<span class="sourceLineNo">377</span><a name="line.377"></a>
+<span class="sourceLineNo">378</span> protected BaseLoadBalancer.Cluster mockCluster(int[] mockCluster) {<a name="line.378"></a>
+<span class="sourceLineNo">379</span> return new BaseLoadBalancer.Cluster(<a name="line.379"></a>
+<span class="sourceLineNo">380</span> mockClusterServers(mockCluster, -1), null, null, null);<a name="line.380"></a>
+<span class="sourceLineNo">381</span> }<a name="line.381"></a>
+<span class="sourceLineNo">382</span><a name="line.382"></a>
+<span class="sourceLineNo">383</span> protected TreeMap<ServerName, List<RegionInfo>> mockClusterServers(int[] mockCluster, int numTables) {<a name="line.383"></a>
+<span class="sourceLineNo">384</span> int numServers = mockCluster.length;<a name="line.384"></a>
+<span class="sourceLineNo">385</span> TreeMap<ServerName, List<RegionInfo>> servers = new TreeMap<>();<a name="line.385"></a>
+<span class="sourceLineNo">386</span> for (int i = 0; i < numServers; i++) {<a name="line.386"></a>
+<span class="sourceLineNo">387</span> int numRegions = mockCluster[i];<a name="line.387"></a>
+<span class="sourceLineNo">388</span> ServerAndLoad sal = randomServer(0);<a name="line.388"></a>
+<span class="sourceLineNo">389</span> List<RegionInfo> regions = randomRegions(numRegions, numTables);<a name="line.389"></a>
+<span class="sourceLineNo">390</span> servers.put(sal.getServerName(), regions);<a name="line.390"></a>
+<span class="sourceLineNo">391</span> }<a name="line.391"></a>
+<span class="sourceLineNo">392</span> return servers;<a name="line.392"></a>
+<span class="sourceLineNo">393</span> }<a name="line.393"></a>
+<span class="sourceLineNo">394</span><a name="line.394"></a>
+<span class="sourceLineNo">395</span> protected TreeMap<ServerName, List<RegionInfo>> mockUniformClusterServers(int[] mockCluster) {<a name="line.395"></a>
+<span class="sourceLineNo">396</span> int numServers = mockCluster.length;<a name="line.396"></a>
+<span class="sourceLineNo">397</span> TreeMap<ServerName, List<RegionInfo>> servers = new TreeMap<>();<a name="line.397"></a>
+<span class="sourceLineNo">398</span> for (int i = 0; i < numServers; i++) {<a name="line.398"></a>
+<span class="sourceLineNo">399</span> int numRegions = mockCluster[i];<a name="line.399"></a>
+<span class="sourceLineNo">400</span> ServerAndLoad sal = randomServer(0);<a name="line.400"></a>
+<span class="sourceLineNo">401</span> List<RegionInfo> regions = uniformRegions(numRegions);<a name="line.401"></a>
+<span class="sourceLineNo">402</span> servers.put(sal.getServerName(), regions);<a name="line.402"></a>
+<span class="sourceLineNo">403</span> }<a name="line.403"></a>
+<span class="sourceLineNo">404</span> return servers;<a name="line.404"></a>
+<span class="sourceLineNo">405</span> }<a name="line.405"></a>
+<span class="sourceLineNo">406</span><a name="line.406"></a>
+<span class="sourceLineNo">407</span> protected HashMap<TableName, TreeMap<ServerName, List<RegionInfo>>> mockClusterServersWithTables(Map<ServerName, List<RegionInfo>> clusterServers) {<a name="line.407"></a>
+<span class="sourceLineNo">408</span> HashMap<TableName, TreeMap<ServerName, List<RegionInfo>>> result = new HashMap<>();<a name="line.408"></a>
+<span class="sourceLineNo">409</span> for (Map.Entry<ServerName, List<RegionInfo>> entry : clusterServers.entrySet()) {<a name="line.409"></a>
+<span class="sourceLineNo">410</span> ServerName sal = entry.getKey();<a name="line.410"></a>
+<span class="sourceLineNo">411</span> List<RegionInfo> regions = entry.getValue();<a name="line.411"></a>
+<span class="sourceLineNo">412</span> for (RegionInfo hri : regions){<a name="line.412"></a>
+<span class="sourceLineNo">413</span> TreeMap<ServerName, List<RegionInfo>> servers = result.get(hri.getTable());<a name="line.413"></a>
+<span class="sourceLineNo">414</span> if (servers == null) {<a name="line.414"></a>
+<span class="sourceLineNo">415</span> servers = new TreeMap<>();<a name="line.415"></a>
+<span class="sourceLineNo">416</span> result.put(hri.getTable(), servers);<a name="line.416"></a>
+<span class="sourceLineNo">417</span> }<a name="line.417"></a>
+<span class="sourceLineNo">418</span> List<RegionInfo> hrilist = servers.get(sal);<a name="line.418"></a>
+<span class="sourceLineNo">419</span> if (hrilist == null) {<a name="line.419"></a>
+<span class="sourceLineNo">420</span> hrilist = new ArrayList<>();<a name="line.420"></a>
+<span class="sourceLineNo">421</span> servers.put(sal, hrilist);<a name="line.421"></a>
+<span class="sourceLineNo">422</span> }<a name="line.422"></a>
+<span class="sourceLineNo">423</span> hrilist.add(hri);<a name="line.423"></a>
+<span class="sourceLineNo">424</span> }<a name="line.424"></a>
+<span class="sourceLineNo">425</span> }<a name="line.425"></a>
+<span class="sourceLineNo">426</span> for(Map.Entry<TableName, TreeMap<ServerName, List<RegionInfo>>> entry : result.entrySet()){<a name="line.426"
<TRUNCATED>