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<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.master.procedure;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.InterruptedIOException;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.concurrent.ExecutionException;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.concurrent.Future;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.concurrent.TimeUnit;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.TimeoutException;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.conf.Configuration;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.NotAllMetaRegionsOnlineException;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.exceptions.TimeoutIOException;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.master.assignment.RegionStates;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.procedure2.Procedure;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.quotas.MasterQuotaManager;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.slf4j.Logger;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.slf4j.LoggerFactory;<a name="line.41"></a>
<span class="sourceLineNo">042</span><a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos.ProcedureState;<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>/**<a name="line.45"></a>
<span class="sourceLineNo">046</span> * Helper to synchronously wait on conditions.<a name="line.46"></a>
<span class="sourceLineNo">047</span> * This will be removed in the future (mainly when the AssignmentManager will be<a name="line.47"></a>
<span class="sourceLineNo">048</span> * replaced with a Procedure version) by using ProcedureYieldException,<a name="line.48"></a>
<span class="sourceLineNo">049</span> * and the queue will handle waiting and scheduling based on events.<a name="line.49"></a>
<span class="sourceLineNo">050</span> */<a name="line.50"></a>
<span class="sourceLineNo">051</span>@InterfaceAudience.Private<a name="line.51"></a>
<span class="sourceLineNo">052</span>@InterfaceStability.Evolving<a name="line.52"></a>
<span class="sourceLineNo">053</span>public final class ProcedureSyncWait {<a name="line.53"></a>
<span class="sourceLineNo">054</span> private static final Logger LOG = LoggerFactory.getLogger(ProcedureSyncWait.class);<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span> private ProcedureSyncWait() {}<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span> @InterfaceAudience.Private<a name="line.58"></a>
<span class="sourceLineNo">059</span> public interface Predicate&lt;T&gt; {<a name="line.59"></a>
<span class="sourceLineNo">060</span> T evaluate() throws IOException;<a name="line.60"></a>
<span class="sourceLineNo">061</span> }<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span> private static class ProcedureFuture implements Future&lt;byte[]&gt; {<a name="line.63"></a>
<span class="sourceLineNo">064</span> private final ProcedureExecutor&lt;MasterProcedureEnv&gt; procExec;<a name="line.64"></a>
<span class="sourceLineNo">065</span> private final Procedure&lt;?&gt; proc;<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span> private boolean hasResult = false;<a name="line.67"></a>
<span class="sourceLineNo">068</span> private byte[] result = null;<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span> public ProcedureFuture(ProcedureExecutor&lt;MasterProcedureEnv&gt; procExec, Procedure&lt;?&gt; proc) {<a name="line.70"></a>
<span class="sourceLineNo">071</span> this.procExec = procExec;<a name="line.71"></a>
<span class="sourceLineNo">072</span> this.proc = proc;<a name="line.72"></a>
<span class="sourceLineNo">073</span> }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span> @Override<a name="line.75"></a>
<span class="sourceLineNo">076</span> public boolean cancel(boolean mayInterruptIfRunning) {<a name="line.76"></a>
<span class="sourceLineNo">077</span> return false;<a name="line.77"></a>
<span class="sourceLineNo">078</span> }<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>
<span class="sourceLineNo">080</span> @Override<a name="line.80"></a>
<span class="sourceLineNo">081</span> public boolean isCancelled() {<a name="line.81"></a>
<span class="sourceLineNo">082</span> return false;<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> @Override<a name="line.85"></a>
<span class="sourceLineNo">086</span> public boolean isDone() {<a name="line.86"></a>
<span class="sourceLineNo">087</span> return hasResult;<a name="line.87"></a>
<span class="sourceLineNo">088</span> }<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span> @Override<a name="line.90"></a>
<span class="sourceLineNo">091</span> public byte[] get() throws InterruptedException, ExecutionException {<a name="line.91"></a>
<span class="sourceLineNo">092</span> if (hasResult) {<a name="line.92"></a>
<span class="sourceLineNo">093</span> return result;<a name="line.93"></a>
<span class="sourceLineNo">094</span> }<a name="line.94"></a>
<span class="sourceLineNo">095</span> try {<a name="line.95"></a>
<span class="sourceLineNo">096</span> return waitForProcedureToComplete(procExec, proc, Long.MAX_VALUE);<a name="line.96"></a>
<span class="sourceLineNo">097</span> } catch (Exception e) {<a name="line.97"></a>
<span class="sourceLineNo">098</span> throw new ExecutionException(e);<a name="line.98"></a>
<span class="sourceLineNo">099</span> }<a name="line.99"></a>
<span class="sourceLineNo">100</span> }<a name="line.100"></a>
<span class="sourceLineNo">101</span><a name="line.101"></a>
<span class="sourceLineNo">102</span> @Override<a name="line.102"></a>
<span class="sourceLineNo">103</span> public byte[] get(long timeout, TimeUnit unit)<a name="line.103"></a>
<span class="sourceLineNo">104</span> throws InterruptedException, ExecutionException, TimeoutException {<a name="line.104"></a>
<span class="sourceLineNo">105</span> if (hasResult) {<a name="line.105"></a>
<span class="sourceLineNo">106</span> return result;<a name="line.106"></a>
<span class="sourceLineNo">107</span> }<a name="line.107"></a>
<span class="sourceLineNo">108</span> try {<a name="line.108"></a>
<span class="sourceLineNo">109</span> result = waitForProcedureToComplete(procExec, proc, unit.toMillis(timeout));<a name="line.109"></a>
<span class="sourceLineNo">110</span> hasResult = true;<a name="line.110"></a>
<span class="sourceLineNo">111</span> return result;<a name="line.111"></a>
<span class="sourceLineNo">112</span> } catch (TimeoutIOException e) {<a name="line.112"></a>
<span class="sourceLineNo">113</span> throw new TimeoutException(e.getMessage());<a name="line.113"></a>
<span class="sourceLineNo">114</span> } catch (Exception e) {<a name="line.114"></a>
<span class="sourceLineNo">115</span> throw new ExecutionException(e);<a name="line.115"></a>
<span class="sourceLineNo">116</span> }<a name="line.116"></a>
<span class="sourceLineNo">117</span> }<a name="line.117"></a>
<span class="sourceLineNo">118</span> }<a name="line.118"></a>
<span class="sourceLineNo">119</span><a name="line.119"></a>
<span class="sourceLineNo">120</span> public static Future&lt;byte[]&gt; submitProcedure(final ProcedureExecutor&lt;MasterProcedureEnv&gt; procExec,<a name="line.120"></a>
<span class="sourceLineNo">121</span> final Procedure&lt;MasterProcedureEnv&gt; proc) {<a name="line.121"></a>
<span class="sourceLineNo">122</span> if (proc.isInitializing()) {<a name="line.122"></a>
<span class="sourceLineNo">123</span> procExec.submitProcedure(proc);<a name="line.123"></a>
<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span> return new ProcedureFuture(procExec, proc);<a name="line.125"></a>
<span class="sourceLineNo">126</span> }<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span> public static byte[] submitAndWaitProcedure(ProcedureExecutor&lt;MasterProcedureEnv&gt; procExec,<a name="line.128"></a>
<span class="sourceLineNo">129</span> final Procedure&lt;MasterProcedureEnv&gt; proc) throws IOException {<a name="line.129"></a>
<span class="sourceLineNo">130</span> if (proc.isInitializing()) {<a name="line.130"></a>
<span class="sourceLineNo">131</span> procExec.submitProcedure(proc);<a name="line.131"></a>
<span class="sourceLineNo">132</span> }<a name="line.132"></a>
<span class="sourceLineNo">133</span> return waitForProcedureToCompleteIOE(procExec, proc, Long.MAX_VALUE);<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span><a name="line.135"></a>
<span class="sourceLineNo">136</span> public static byte[] waitForProcedureToCompleteIOE(<a name="line.136"></a>
<span class="sourceLineNo">137</span> final ProcedureExecutor&lt;MasterProcedureEnv&gt; procExec, final Procedure&lt;?&gt; proc,<a name="line.137"></a>
<span class="sourceLineNo">138</span> final long timeout) throws IOException {<a name="line.138"></a>
<span class="sourceLineNo">139</span> try {<a name="line.139"></a>
<span class="sourceLineNo">140</span> return waitForProcedureToComplete(procExec, proc, timeout);<a name="line.140"></a>
<span class="sourceLineNo">141</span> } catch (IOException e) {<a name="line.141"></a>
<span class="sourceLineNo">142</span> throw e;<a name="line.142"></a>
<span class="sourceLineNo">143</span> } catch (Exception e) {<a name="line.143"></a>
<span class="sourceLineNo">144</span> throw new IOException(e);<a name="line.144"></a>
<span class="sourceLineNo">145</span> }<a name="line.145"></a>
<span class="sourceLineNo">146</span> }<a name="line.146"></a>
<span class="sourceLineNo">147</span><a name="line.147"></a>
<span class="sourceLineNo">148</span> public static byte[] waitForProcedureToComplete(<a name="line.148"></a>
<span class="sourceLineNo">149</span> final ProcedureExecutor&lt;MasterProcedureEnv&gt; procExec, final Procedure&lt;?&gt; proc,<a name="line.149"></a>
<span class="sourceLineNo">150</span> final long timeout) throws IOException {<a name="line.150"></a>
<span class="sourceLineNo">151</span> waitFor(procExec.getEnvironment(), timeout, "pid=" + proc.getProcId(),<a name="line.151"></a>
<span class="sourceLineNo">152</span> new ProcedureSyncWait.Predicate&lt;Boolean&gt;() {<a name="line.152"></a>
<span class="sourceLineNo">153</span> @Override<a name="line.153"></a>
<span class="sourceLineNo">154</span> public Boolean evaluate() throws IOException {<a name="line.154"></a>
<span class="sourceLineNo">155</span> if (!procExec.isRunning()) {<a name="line.155"></a>
<span class="sourceLineNo">156</span> return true;<a name="line.156"></a>
<span class="sourceLineNo">157</span> }<a name="line.157"></a>
<span class="sourceLineNo">158</span> ProcedureState state = proc.getState();<a name="line.158"></a>
<span class="sourceLineNo">159</span> if (state == ProcedureState.INITIALIZING || state == ProcedureState.RUNNABLE) {<a name="line.159"></a>
<span class="sourceLineNo">160</span> // under these states the procedure may have not been added to procExec yet, so do not<a name="line.160"></a>
<span class="sourceLineNo">161</span> // use isFinished to test whether it is finished, as this method will just check if the<a name="line.161"></a>
<span class="sourceLineNo">162</span> // procedure is in the running procedure list<a name="line.162"></a>
<span class="sourceLineNo">163</span> return false;<a name="line.163"></a>
<span class="sourceLineNo">164</span> }<a name="line.164"></a>
<span class="sourceLineNo">165</span> return procExec.isFinished(proc.getProcId());<a name="line.165"></a>
<span class="sourceLineNo">166</span> }<a name="line.166"></a>
<span class="sourceLineNo">167</span> });<a name="line.167"></a>
<span class="sourceLineNo">168</span> if (!procExec.isRunning()) {<a name="line.168"></a>
<span class="sourceLineNo">169</span> throw new IOException("The Master is Aborting");<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span> // If the procedure fails, we should always have an exception captured. Throw it.<a name="line.172"></a>
<span class="sourceLineNo">173</span> // Needs to be an IOE to get out of here.<a name="line.173"></a>
<span class="sourceLineNo">174</span> if (proc.hasException()) {<a name="line.174"></a>
<span class="sourceLineNo">175</span> throw MasterProcedureUtil.unwrapRemoteIOException(proc);<a name="line.175"></a>
<span class="sourceLineNo">176</span> } else {<a name="line.176"></a>
<span class="sourceLineNo">177</span> return proc.getResult();<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> public static &lt;T&gt; T waitFor(MasterProcedureEnv env, String purpose, Predicate&lt;T&gt; predicate)<a name="line.181"></a>
<span class="sourceLineNo">182</span> throws IOException {<a name="line.182"></a>
<span class="sourceLineNo">183</span> Configuration conf = env.getMasterConfiguration();<a name="line.183"></a>
<span class="sourceLineNo">184</span> long waitTime = conf.getLong("hbase.master.wait.on.region", 5 * 60 * 1000);<a name="line.184"></a>
<span class="sourceLineNo">185</span> return waitFor(env, waitTime, purpose, predicate);<a name="line.185"></a>
<span class="sourceLineNo">186</span> }<a name="line.186"></a>
<span class="sourceLineNo">187</span><a name="line.187"></a>
<span class="sourceLineNo">188</span> public static &lt;T&gt; T waitFor(MasterProcedureEnv env, long waitTime, String purpose,<a name="line.188"></a>
<span class="sourceLineNo">189</span> Predicate&lt;T&gt; predicate) throws IOException {<a name="line.189"></a>
<span class="sourceLineNo">190</span> Configuration conf = env.getMasterConfiguration();<a name="line.190"></a>
<span class="sourceLineNo">191</span> long waitingTimeForEvents = conf.getInt("hbase.master.event.waiting.time", 1000);<a name="line.191"></a>
<span class="sourceLineNo">192</span> return waitFor(env, waitTime, waitingTimeForEvents, purpose, predicate);<a name="line.192"></a>
<span class="sourceLineNo">193</span> }<a name="line.193"></a>
<span class="sourceLineNo">194</span><a name="line.194"></a>
<span class="sourceLineNo">195</span> public static &lt;T&gt; T waitFor(MasterProcedureEnv env, long waitTime, long waitingTimeForEvents,<a name="line.195"></a>
<span class="sourceLineNo">196</span> String purpose, Predicate&lt;T&gt; predicate) throws IOException {<a name="line.196"></a>
<span class="sourceLineNo">197</span> long done = EnvironmentEdgeManager.currentTime() + waitTime;<a name="line.197"></a>
<span class="sourceLineNo">198</span> if (done &lt;= 0) {<a name="line.198"></a>
<span class="sourceLineNo">199</span> // long overflow, usually this means we pass Long.MAX_VALUE as waitTime<a name="line.199"></a>
<span class="sourceLineNo">200</span> done = Long.MAX_VALUE;<a name="line.200"></a>
<span class="sourceLineNo">201</span> }<a name="line.201"></a>
<span class="sourceLineNo">202</span> boolean logged = false;<a name="line.202"></a>
<span class="sourceLineNo">203</span> do {<a name="line.203"></a>
<span class="sourceLineNo">204</span> T result = predicate.evaluate();<a name="line.204"></a>
<span class="sourceLineNo">205</span> if (result != null &amp;&amp; !result.equals(Boolean.FALSE)) {<a name="line.205"></a>
<span class="sourceLineNo">206</span> return result;<a name="line.206"></a>
<span class="sourceLineNo">207</span> }<a name="line.207"></a>
<span class="sourceLineNo">208</span> try {<a name="line.208"></a>
<span class="sourceLineNo">209</span> Thread.sleep(waitingTimeForEvents);<a name="line.209"></a>
<span class="sourceLineNo">210</span> } catch (InterruptedException e) {<a name="line.210"></a>
<span class="sourceLineNo">211</span> LOG.warn("Interrupted while sleeping, waiting on " + purpose);<a name="line.211"></a>
<span class="sourceLineNo">212</span> throw (InterruptedIOException)new InterruptedIOException().initCause(e);<a name="line.212"></a>
<span class="sourceLineNo">213</span> }<a name="line.213"></a>
<span class="sourceLineNo">214</span> if (LOG.isTraceEnabled()) {<a name="line.214"></a>
<span class="sourceLineNo">215</span> LOG.trace("waitFor " + purpose);<a name="line.215"></a>
<span class="sourceLineNo">216</span> } else {<a name="line.216"></a>
<span class="sourceLineNo">217</span> if (!logged) LOG.debug("waitFor " + purpose);<a name="line.217"></a>
<span class="sourceLineNo">218</span> }<a name="line.218"></a>
<span class="sourceLineNo">219</span> logged = true;<a name="line.219"></a>
<span class="sourceLineNo">220</span> } while (EnvironmentEdgeManager.currentTime() &lt; done &amp;&amp; env.isRunning());<a name="line.220"></a>
<span class="sourceLineNo">221</span><a name="line.221"></a>
<span class="sourceLineNo">222</span> throw new TimeoutIOException("Timed out while waiting on " + purpose);<a name="line.222"></a>
<span class="sourceLineNo">223</span> }<a name="line.223"></a>
<span class="sourceLineNo">224</span><a name="line.224"></a>
<span class="sourceLineNo">225</span> protected static void waitMetaRegions(final MasterProcedureEnv env) throws IOException {<a name="line.225"></a>
<span class="sourceLineNo">226</span> int timeout = env.getMasterConfiguration().getInt("hbase.client.catalog.timeout", 10000);<a name="line.226"></a>
<span class="sourceLineNo">227</span> try {<a name="line.227"></a>
<span class="sourceLineNo">228</span> if (MetaTableLocator.waitMetaRegionLocation(env.getMasterServices().getZooKeeper(),<a name="line.228"></a>
<span class="sourceLineNo">229</span> timeout) == null) {<a name="line.229"></a>
<span class="sourceLineNo">230</span> throw new NotAllMetaRegionsOnlineException();<a name="line.230"></a>
<span class="sourceLineNo">231</span> }<a name="line.231"></a>
<span class="sourceLineNo">232</span> } catch (InterruptedException e) {<a name="line.232"></a>
<span class="sourceLineNo">233</span> throw (InterruptedIOException) new InterruptedIOException().initCause(e);<a name="line.233"></a>
<span class="sourceLineNo">234</span> }<a name="line.234"></a>
<span class="sourceLineNo">235</span> }<a name="line.235"></a>
<span class="sourceLineNo">236</span><a name="line.236"></a>
<span class="sourceLineNo">237</span> protected static void waitRegionInTransition(final MasterProcedureEnv env,<a name="line.237"></a>
<span class="sourceLineNo">238</span> final List&lt;RegionInfo&gt; regions) throws IOException {<a name="line.238"></a>
<span class="sourceLineNo">239</span> final RegionStates states = env.getAssignmentManager().getRegionStates();<a name="line.239"></a>
<span class="sourceLineNo">240</span> for (final RegionInfo region : regions) {<a name="line.240"></a>
<span class="sourceLineNo">241</span> ProcedureSyncWait.waitFor(env, "regions " + region.getRegionNameAsString() + " in transition",<a name="line.241"></a>
<span class="sourceLineNo">242</span> new ProcedureSyncWait.Predicate&lt;Boolean&gt;() {<a name="line.242"></a>
<span class="sourceLineNo">243</span> @Override<a name="line.243"></a>
<span class="sourceLineNo">244</span> public Boolean evaluate() throws IOException {<a name="line.244"></a>
<span class="sourceLineNo">245</span> return !states.isRegionInTransition(region);<a name="line.245"></a>
<span class="sourceLineNo">246</span> }<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><a name="line.250"></a>
<span class="sourceLineNo">251</span> protected static MasterQuotaManager getMasterQuotaManager(final MasterProcedureEnv env)<a name="line.251"></a>
<span class="sourceLineNo">252</span> throws IOException {<a name="line.252"></a>
<span class="sourceLineNo">253</span> return ProcedureSyncWait.waitFor(env, "quota manager to be available",<a name="line.253"></a>
<span class="sourceLineNo">254</span> new ProcedureSyncWait.Predicate&lt;MasterQuotaManager&gt;() {<a name="line.254"></a>
<span class="sourceLineNo">255</span> @Override<a name="line.255"></a>
<span class="sourceLineNo">256</span> public MasterQuotaManager evaluate() throws IOException {<a name="line.256"></a>
<span class="sourceLineNo">257</span> return env.getMasterServices().getMasterQuotaManager();<a name="line.257"></a>
<span class="sourceLineNo">258</span> }<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>}<a name="line.261"></a>
</pre>
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