http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a3fb6d74/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html index 90f5348..8824b66 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html @@ -100,965 +100,962 @@ <span class="sourceLineNo">092</span> * A server is fully processed only after the handler is fully enabled<a name="line.92"></a> <span class="sourceLineNo">093</span> * and has completed the handling.<a name="line.93"></a> <span class="sourceLineNo">094</span> */<a name="line.94"></a> -<span class="sourceLineNo">095</span>/**<a name="line.95"></a> -<span class="sourceLineNo">096</span> *<a name="line.96"></a> -<span class="sourceLineNo">097</span> */<a name="line.97"></a> -<span class="sourceLineNo">098</span>@InterfaceAudience.Private<a name="line.98"></a> -<span class="sourceLineNo">099</span>public class ServerManager {<a name="line.99"></a> -<span class="sourceLineNo">100</span> public static final String WAIT_ON_REGIONSERVERS_MAXTOSTART =<a name="line.100"></a> -<span class="sourceLineNo">101</span> "hbase.master.wait.on.regionservers.maxtostart";<a name="line.101"></a> +<span class="sourceLineNo">095</span>@InterfaceAudience.Private<a name="line.95"></a> +<span class="sourceLineNo">096</span>public class ServerManager {<a name="line.96"></a> +<span class="sourceLineNo">097</span> public static final String WAIT_ON_REGIONSERVERS_MAXTOSTART =<a name="line.97"></a> +<span class="sourceLineNo">098</span> "hbase.master.wait.on.regionservers.maxtostart";<a name="line.98"></a> +<span class="sourceLineNo">099</span><a name="line.99"></a> +<span class="sourceLineNo">100</span> public static final String WAIT_ON_REGIONSERVERS_MINTOSTART =<a name="line.100"></a> +<span class="sourceLineNo">101</span> "hbase.master.wait.on.regionservers.mintostart";<a name="line.101"></a> <span class="sourceLineNo">102</span><a name="line.102"></a> -<span class="sourceLineNo">103</span> public static final String WAIT_ON_REGIONSERVERS_MINTOSTART =<a name="line.103"></a> -<span class="sourceLineNo">104</span> "hbase.master.wait.on.regionservers.mintostart";<a name="line.104"></a> +<span class="sourceLineNo">103</span> public static final String WAIT_ON_REGIONSERVERS_TIMEOUT =<a name="line.103"></a> +<span class="sourceLineNo">104</span> "hbase.master.wait.on.regionservers.timeout";<a name="line.104"></a> <span class="sourceLineNo">105</span><a name="line.105"></a> -<span class="sourceLineNo">106</span> public static final String WAIT_ON_REGIONSERVERS_TIMEOUT =<a name="line.106"></a> -<span class="sourceLineNo">107</span> "hbase.master.wait.on.regionservers.timeout";<a name="line.107"></a> +<span class="sourceLineNo">106</span> public static final String WAIT_ON_REGIONSERVERS_INTERVAL =<a name="line.106"></a> +<span class="sourceLineNo">107</span> "hbase.master.wait.on.regionservers.interval";<a name="line.107"></a> <span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> public static final String WAIT_ON_REGIONSERVERS_INTERVAL =<a name="line.109"></a> -<span class="sourceLineNo">110</span> "hbase.master.wait.on.regionservers.interval";<a name="line.110"></a> -<span class="sourceLineNo">111</span><a name="line.111"></a> -<span class="sourceLineNo">112</span> private static final Logger LOG = LoggerFactory.getLogger(ServerManager.class);<a name="line.112"></a> +<span class="sourceLineNo">109</span> private static final Logger LOG = LoggerFactory.getLogger(ServerManager.class);<a name="line.109"></a> +<span class="sourceLineNo">110</span><a name="line.110"></a> +<span class="sourceLineNo">111</span> // Set if we are to shutdown the cluster.<a name="line.111"></a> +<span class="sourceLineNo">112</span> private AtomicBoolean clusterShutdown = new AtomicBoolean(false);<a name="line.112"></a> <span class="sourceLineNo">113</span><a name="line.113"></a> -<span class="sourceLineNo">114</span> // Set if we are to shutdown the cluster.<a name="line.114"></a> -<span class="sourceLineNo">115</span> private AtomicBoolean clusterShutdown = new AtomicBoolean(false);<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> * The last flushed sequence id for a region.<a name="line.118"></a> -<span class="sourceLineNo">119</span> */<a name="line.119"></a> -<span class="sourceLineNo">120</span> private final ConcurrentNavigableMap<byte[], Long> flushedSequenceIdByRegion =<a name="line.120"></a> -<span class="sourceLineNo">121</span> new ConcurrentSkipListMap<>(Bytes.BYTES_COMPARATOR);<a name="line.121"></a> -<span class="sourceLineNo">122</span><a name="line.122"></a> -<span class="sourceLineNo">123</span> /**<a name="line.123"></a> -<span class="sourceLineNo">124</span> * The last flushed sequence id for a store in a region.<a name="line.124"></a> -<span class="sourceLineNo">125</span> */<a name="line.125"></a> -<span class="sourceLineNo">126</span> private final ConcurrentNavigableMap<byte[], ConcurrentNavigableMap<byte[], Long>><a name="line.126"></a> -<span class="sourceLineNo">127</span> storeFlushedSequenceIdsByRegion = new ConcurrentSkipListMap<>(Bytes.BYTES_COMPARATOR);<a name="line.127"></a> +<span class="sourceLineNo">114</span> /**<a name="line.114"></a> +<span class="sourceLineNo">115</span> * The last flushed sequence id for a region.<a name="line.115"></a> +<span class="sourceLineNo">116</span> */<a name="line.116"></a> +<span class="sourceLineNo">117</span> private final ConcurrentNavigableMap<byte[], Long> flushedSequenceIdByRegion =<a name="line.117"></a> +<span class="sourceLineNo">118</span> new ConcurrentSkipListMap<>(Bytes.BYTES_COMPARATOR);<a name="line.118"></a> +<span class="sourceLineNo">119</span><a name="line.119"></a> +<span class="sourceLineNo">120</span> /**<a name="line.120"></a> +<span class="sourceLineNo">121</span> * The last flushed sequence id for a store in a region.<a name="line.121"></a> +<span class="sourceLineNo">122</span> */<a name="line.122"></a> +<span class="sourceLineNo">123</span> private final ConcurrentNavigableMap<byte[], ConcurrentNavigableMap<byte[], Long>><a name="line.123"></a> +<span class="sourceLineNo">124</span> storeFlushedSequenceIdsByRegion = new ConcurrentSkipListMap<>(Bytes.BYTES_COMPARATOR);<a name="line.124"></a> +<span class="sourceLineNo">125</span><a name="line.125"></a> +<span class="sourceLineNo">126</span> /** Map of registered servers to their current load */<a name="line.126"></a> +<span class="sourceLineNo">127</span> private final ConcurrentNavigableMap<ServerName, ServerLoad> onlineServers = new ConcurrentSkipListMap<>();<a name="line.127"></a> <span class="sourceLineNo">128</span><a name="line.128"></a> -<span class="sourceLineNo">129</span> /** Map of registered servers to their current load */<a name="line.129"></a> -<span class="sourceLineNo">130</span> private final ConcurrentNavigableMap<ServerName, ServerLoad> onlineServers = new ConcurrentSkipListMap<>();<a name="line.130"></a> -<span class="sourceLineNo">131</span><a name="line.131"></a> -<span class="sourceLineNo">132</span> /**<a name="line.132"></a> -<span class="sourceLineNo">133</span> * Map of admin interfaces per registered regionserver; these interfaces we use to control<a name="line.133"></a> -<span class="sourceLineNo">134</span> * regionservers out on the cluster<a name="line.134"></a> -<span class="sourceLineNo">135</span> */<a name="line.135"></a> -<span class="sourceLineNo">136</span> private final Map<ServerName, AdminService.BlockingInterface> rsAdmins = new HashMap<>();<a name="line.136"></a> +<span class="sourceLineNo">129</span> /**<a name="line.129"></a> +<span class="sourceLineNo">130</span> * Map of admin interfaces per registered regionserver; these interfaces we use to control<a name="line.130"></a> +<span class="sourceLineNo">131</span> * regionservers out on the cluster<a name="line.131"></a> +<span class="sourceLineNo">132</span> */<a name="line.132"></a> +<span class="sourceLineNo">133</span> private final Map<ServerName, AdminService.BlockingInterface> rsAdmins = new HashMap<>();<a name="line.133"></a> +<span class="sourceLineNo">134</span><a name="line.134"></a> +<span class="sourceLineNo">135</span> /** List of region servers that should not get any more new regions. */<a name="line.135"></a> +<span class="sourceLineNo">136</span> private final ArrayList<ServerName> drainingServers = new ArrayList<>();<a name="line.136"></a> <span class="sourceLineNo">137</span><a name="line.137"></a> -<span class="sourceLineNo">138</span> /** List of region servers that should not get any more new regions. */<a name="line.138"></a> -<span class="sourceLineNo">139</span> private final ArrayList<ServerName> drainingServers = new ArrayList<>();<a name="line.139"></a> +<span class="sourceLineNo">138</span> private final MasterServices master;<a name="line.138"></a> +<span class="sourceLineNo">139</span> private final ClusterConnection connection;<a name="line.139"></a> <span class="sourceLineNo">140</span><a name="line.140"></a> -<span class="sourceLineNo">141</span> private final MasterServices master;<a name="line.141"></a> -<span class="sourceLineNo">142</span> private final ClusterConnection connection;<a name="line.142"></a> -<span class="sourceLineNo">143</span><a name="line.143"></a> -<span class="sourceLineNo">144</span> private final DeadServer deadservers = new DeadServer();<a name="line.144"></a> +<span class="sourceLineNo">141</span> private final DeadServer deadservers = new DeadServer();<a name="line.141"></a> +<span class="sourceLineNo">142</span><a name="line.142"></a> +<span class="sourceLineNo">143</span> private final long maxSkew;<a name="line.143"></a> +<span class="sourceLineNo">144</span> private final long warningSkew;<a name="line.144"></a> <span class="sourceLineNo">145</span><a name="line.145"></a> -<span class="sourceLineNo">146</span> private final long maxSkew;<a name="line.146"></a> -<span class="sourceLineNo">147</span> private final long warningSkew;<a name="line.147"></a> -<span class="sourceLineNo">148</span><a name="line.148"></a> -<span class="sourceLineNo">149</span> private final RpcControllerFactory rpcControllerFactory;<a name="line.149"></a> -<span class="sourceLineNo">150</span><a name="line.150"></a> -<span class="sourceLineNo">151</span> /**<a name="line.151"></a> -<span class="sourceLineNo">152</span> * Set of region servers which are dead but not processed immediately. If one<a name="line.152"></a> -<span class="sourceLineNo">153</span> * server died before master enables ServerShutdownHandler, the server will be<a name="line.153"></a> -<span class="sourceLineNo">154</span> * added to this set and will be processed through calling<a name="line.154"></a> -<span class="sourceLineNo">155</span> * {@link ServerManager#processQueuedDeadServers()} by master.<a name="line.155"></a> -<span class="sourceLineNo">156</span> * <p><a name="line.156"></a> -<span class="sourceLineNo">157</span> * A dead server is a server instance known to be dead, not listed in the /hbase/rs<a name="line.157"></a> -<span class="sourceLineNo">158</span> * znode any more. It may have not been submitted to ServerShutdownHandler yet<a name="line.158"></a> -<span class="sourceLineNo">159</span> * because the handler is not enabled.<a name="line.159"></a> +<span class="sourceLineNo">146</span> private final RpcControllerFactory rpcControllerFactory;<a name="line.146"></a> +<span class="sourceLineNo">147</span><a name="line.147"></a> +<span class="sourceLineNo">148</span> /**<a name="line.148"></a> +<span class="sourceLineNo">149</span> * Set of region servers which are dead but not processed immediately. If one<a name="line.149"></a> +<span class="sourceLineNo">150</span> * server died before master enables ServerShutdownHandler, the server will be<a name="line.150"></a> +<span class="sourceLineNo">151</span> * added to this set and will be processed through calling<a name="line.151"></a> +<span class="sourceLineNo">152</span> * {@link ServerManager#processQueuedDeadServers()} by master.<a name="line.152"></a> +<span class="sourceLineNo">153</span> * <p><a name="line.153"></a> +<span class="sourceLineNo">154</span> * A dead server is a server instance known to be dead, not listed in the /hbase/rs<a name="line.154"></a> +<span class="sourceLineNo">155</span> * znode any more. It may have not been submitted to ServerShutdownHandler yet<a name="line.155"></a> +<span class="sourceLineNo">156</span> * because the handler is not enabled.<a name="line.156"></a> +<span class="sourceLineNo">157</span> * <p><a name="line.157"></a> +<span class="sourceLineNo">158</span> * A dead server, which has been submitted to ServerShutdownHandler while the<a name="line.158"></a> +<span class="sourceLineNo">159</span> * handler is not enabled, is queued up.<a name="line.159"></a> <span class="sourceLineNo">160</span> * <p><a name="line.160"></a> -<span class="sourceLineNo">161</span> * A dead server, which has been submitted to ServerShutdownHandler while the<a name="line.161"></a> -<span class="sourceLineNo">162</span> * handler is not enabled, is queued up.<a name="line.162"></a> -<span class="sourceLineNo">163</span> * <p><a name="line.163"></a> -<span class="sourceLineNo">164</span> * So this is a set of region servers known to be dead but not submitted to<a name="line.164"></a> -<span class="sourceLineNo">165</span> * ServerShutdownHandler for processing yet.<a name="line.165"></a> -<span class="sourceLineNo">166</span> */<a name="line.166"></a> -<span class="sourceLineNo">167</span> private Set<ServerName> queuedDeadServers = new HashSet<>();<a name="line.167"></a> -<span class="sourceLineNo">168</span><a name="line.168"></a> -<span class="sourceLineNo">169</span> /**<a name="line.169"></a> -<span class="sourceLineNo">170</span> * Set of region servers which are dead and submitted to ServerShutdownHandler to process but not<a name="line.170"></a> -<span class="sourceLineNo">171</span> * fully processed immediately.<a name="line.171"></a> -<span class="sourceLineNo">172</span> * <p><a name="line.172"></a> -<span class="sourceLineNo">173</span> * If one server died before assignment manager finished the failover cleanup, the server will be<a name="line.173"></a> -<span class="sourceLineNo">174</span> * added to this set and will be processed through calling<a name="line.174"></a> -<span class="sourceLineNo">175</span> * {@link ServerManager#processQueuedDeadServers()} by assignment manager.<a name="line.175"></a> -<span class="sourceLineNo">176</span> * <p><a name="line.176"></a> -<span class="sourceLineNo">177</span> * The Boolean value indicates whether log split is needed inside ServerShutdownHandler<a name="line.177"></a> -<span class="sourceLineNo">178</span> * <p><a name="line.178"></a> -<span class="sourceLineNo">179</span> * ServerShutdownHandler processes a dead server submitted to the handler after the handler is<a name="line.179"></a> -<span class="sourceLineNo">180</span> * enabled. It may not be able to complete the processing because meta is not yet online or master<a name="line.180"></a> -<span class="sourceLineNo">181</span> * is currently in startup mode. In this case, the dead server will be parked in this set<a name="line.181"></a> -<span class="sourceLineNo">182</span> * temporarily.<a name="line.182"></a> -<span class="sourceLineNo">183</span> */<a name="line.183"></a> -<span class="sourceLineNo">184</span> private Map<ServerName, Boolean> requeuedDeadServers = new ConcurrentHashMap<>();<a name="line.184"></a> +<span class="sourceLineNo">161</span> * So this is a set of region servers known to be dead but not submitted to<a name="line.161"></a> +<span class="sourceLineNo">162</span> * ServerShutdownHandler for processing yet.<a name="line.162"></a> +<span class="sourceLineNo">163</span> */<a name="line.163"></a> +<span class="sourceLineNo">164</span> private Set<ServerName> queuedDeadServers = new HashSet<>();<a name="line.164"></a> +<span class="sourceLineNo">165</span><a name="line.165"></a> +<span class="sourceLineNo">166</span> /**<a name="line.166"></a> +<span class="sourceLineNo">167</span> * Set of region servers which are dead and submitted to ServerShutdownHandler to process but not<a name="line.167"></a> +<span class="sourceLineNo">168</span> * fully processed immediately.<a name="line.168"></a> +<span class="sourceLineNo">169</span> * <p><a name="line.169"></a> +<span class="sourceLineNo">170</span> * If one server died before assignment manager finished the failover cleanup, the server will be<a name="line.170"></a> +<span class="sourceLineNo">171</span> * added to this set and will be processed through calling<a name="line.171"></a> +<span class="sourceLineNo">172</span> * {@link ServerManager#processQueuedDeadServers()} by assignment manager.<a name="line.172"></a> +<span class="sourceLineNo">173</span> * <p><a name="line.173"></a> +<span class="sourceLineNo">174</span> * The Boolean value indicates whether log split is needed inside ServerShutdownHandler<a name="line.174"></a> +<span class="sourceLineNo">175</span> * <p><a name="line.175"></a> +<span class="sourceLineNo">176</span> * ServerShutdownHandler processes a dead server submitted to the handler after the handler is<a name="line.176"></a> +<span class="sourceLineNo">177</span> * enabled. It may not be able to complete the processing because meta is not yet online or master<a name="line.177"></a> +<span class="sourceLineNo">178</span> * is currently in startup mode. In this case, the dead server will be parked in this set<a name="line.178"></a> +<span class="sourceLineNo">179</span> * temporarily.<a name="line.179"></a> +<span class="sourceLineNo">180</span> */<a name="line.180"></a> +<span class="sourceLineNo">181</span> private Map<ServerName, Boolean> requeuedDeadServers = new ConcurrentHashMap<>();<a name="line.181"></a> +<span class="sourceLineNo">182</span><a name="line.182"></a> +<span class="sourceLineNo">183</span> /** Listeners that are called on server events. */<a name="line.183"></a> +<span class="sourceLineNo">184</span> private List<ServerListener> listeners = new CopyOnWriteArrayList<>();<a name="line.184"></a> <span class="sourceLineNo">185</span><a name="line.185"></a> -<span class="sourceLineNo">186</span> /** Listeners that are called on server events. */<a name="line.186"></a> -<span class="sourceLineNo">187</span> private List<ServerListener> listeners = new CopyOnWriteArrayList<>();<a name="line.187"></a> -<span class="sourceLineNo">188</span><a name="line.188"></a> -<span class="sourceLineNo">189</span> /**<a name="line.189"></a> -<span class="sourceLineNo">190</span> * Constructor.<a name="line.190"></a> -<span class="sourceLineNo">191</span> * @param master<a name="line.191"></a> -<span class="sourceLineNo">192</span> * @throws ZooKeeperConnectionException<a name="line.192"></a> -<span class="sourceLineNo">193</span> */<a name="line.193"></a> -<span class="sourceLineNo">194</span> public ServerManager(final MasterServices master) {<a name="line.194"></a> -<span class="sourceLineNo">195</span> this(master, true);<a name="line.195"></a> -<span class="sourceLineNo">196</span> }<a name="line.196"></a> -<span class="sourceLineNo">197</span><a name="line.197"></a> -<span class="sourceLineNo">198</span> ServerManager(final MasterServices master, final boolean connect) {<a name="line.198"></a> -<span class="sourceLineNo">199</span> this.master = master;<a name="line.199"></a> -<span class="sourceLineNo">200</span> Configuration c = master.getConfiguration();<a name="line.200"></a> -<span class="sourceLineNo">201</span> maxSkew = c.getLong("hbase.master.maxclockskew", 30000);<a name="line.201"></a> -<span class="sourceLineNo">202</span> warningSkew = c.getLong("hbase.master.warningclockskew", 10000);<a name="line.202"></a> -<span class="sourceLineNo">203</span> this.connection = connect? master.getClusterConnection(): null;<a name="line.203"></a> -<span class="sourceLineNo">204</span> this.rpcControllerFactory = this.connection == null? null: connection.getRpcControllerFactory();<a name="line.204"></a> -<span class="sourceLineNo">205</span> }<a name="line.205"></a> -<span class="sourceLineNo">206</span><a name="line.206"></a> -<span class="sourceLineNo">207</span> /**<a name="line.207"></a> -<span class="sourceLineNo">208</span> * Add the listener to the notification list.<a name="line.208"></a> -<span class="sourceLineNo">209</span> * @param listener The ServerListener to register<a name="line.209"></a> -<span class="sourceLineNo">210</span> */<a name="line.210"></a> -<span class="sourceLineNo">211</span> public void registerListener(final ServerListener listener) {<a name="line.211"></a> -<span class="sourceLineNo">212</span> this.listeners.add(listener);<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> * Remove the listener from the notification list.<a name="line.216"></a> -<span class="sourceLineNo">217</span> * @param listener The ServerListener to unregister<a name="line.217"></a> -<span class="sourceLineNo">218</span> */<a name="line.218"></a> -<span class="sourceLineNo">219</span> public boolean unregisterListener(final ServerListener listener) {<a name="line.219"></a> -<span class="sourceLineNo">220</span> return this.listeners.remove(listener);<a name="line.220"></a> -<span class="sourceLineNo">221</span> }<a name="line.221"></a> -<span class="sourceLineNo">222</span><a name="line.222"></a> -<span class="sourceLineNo">223</span> /**<a name="line.223"></a> -<span class="sourceLineNo">224</span> * Let the server manager know a new regionserver has come online<a name="line.224"></a> -<span class="sourceLineNo">225</span> * @param request the startup request<a name="line.225"></a> -<span class="sourceLineNo">226</span> * @param ia the InetAddress from which request is received<a name="line.226"></a> -<span class="sourceLineNo">227</span> * @return The ServerName we know this server as.<a name="line.227"></a> -<span class="sourceLineNo">228</span> * @throws IOException<a name="line.228"></a> -<span class="sourceLineNo">229</span> */<a name="line.229"></a> -<span class="sourceLineNo">230</span> ServerName regionServerStartup(RegionServerStartupRequest request, InetAddress ia)<a name="line.230"></a> -<span class="sourceLineNo">231</span> throws IOException {<a name="line.231"></a> -<span class="sourceLineNo">232</span> // Test for case where we get a region startup message from a regionserver<a name="line.232"></a> -<span class="sourceLineNo">233</span> // that has been quickly restarted but whose znode expiration handler has<a name="line.233"></a> -<span class="sourceLineNo">234</span> // not yet run, or from a server whose fail we are currently processing.<a name="line.234"></a> -<span class="sourceLineNo">235</span> // Test its host+port combo is present in serverAddressToServerInfo. If it<a name="line.235"></a> -<span class="sourceLineNo">236</span> // is, reject the server and trigger its expiration. The next time it comes<a name="line.236"></a> -<span class="sourceLineNo">237</span> // in, it should have been removed from serverAddressToServerInfo and queued<a name="line.237"></a> -<span class="sourceLineNo">238</span> // for processing by ProcessServerShutdown.<a name="line.238"></a> -<span class="sourceLineNo">239</span><a name="line.239"></a> -<span class="sourceLineNo">240</span> final String hostname = request.hasUseThisHostnameInstead() ?<a name="line.240"></a> -<span class="sourceLineNo">241</span> request.getUseThisHostnameInstead() :ia.getHostName();<a name="line.241"></a> -<span class="sourceLineNo">242</span> ServerName sn = ServerName.valueOf(hostname, request.getPort(),<a name="line.242"></a> -<span class="sourceLineNo">243</span> request.getServerStartCode());<a name="line.243"></a> -<span class="sourceLineNo">244</span> checkClockSkew(sn, request.getServerCurrentTime());<a name="line.244"></a> -<span class="sourceLineNo">245</span> checkIsDead(sn, "STARTUP");<a 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uses a very naive computation - just uses the number of<a name="line.461"></a> -<span class="sourceLineNo">462</span> * regions being served, ignoring stats about number of requests.<a name="line.462"></a> -<span class="sourceLineNo">463</span> * @return the average load<a name="line.463"></a> -<span class="sourceLineNo">464</span> */<a name="line.464"></a> -<span class="sourceLineNo">465</span> public double getAverageLoad() {<a name="line.465"></a> -<span class="sourceLineNo">466</span> int totalLoad = 0;<a name="line.466"></a> -<span class="sourceLineNo">467</span> int numServers = 0;<a name="line.467"></a> -<span class="sourceLineNo">468</span> for (ServerLoad sl: this.onlineServers.values()) {<a name="line.468"></a> -<span class="sourceLineNo">469</span> numServers++;<a name="line.469"></a> -<span class="sourceLineNo">470</span> totalLoad += sl.getNumberOfRegions();<a name="line.470"></a> -<span class="sourceLineNo">471</span> }<a name="line.471"></a> -<span 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class="sourceLineNo">495</span><a name="line.495"></a> -<span class="sourceLineNo">496</span> /**<a name="line.496"></a> -<span class="sourceLineNo">497</span> * Checks if any dead servers are currently in progress.<a name="line.497"></a> -<span class="sourceLineNo">498</span> * @return true if any RS are being processed as dead, false if not<a name="line.498"></a> -<span class="sourceLineNo">499</span> */<a name="line.499"></a> -<span class="sourceLineNo">500</span> public boolean areDeadServersInProgress() {<a name="line.500"></a> -<span class="sourceLineNo">501</span> return this.deadservers.areDeadServersInProgress();<a name="line.501"></a> -<span class="sourceLineNo">502</span> }<a name="line.502"></a> -<span class="sourceLineNo">503</span><a name="line.503"></a> -<span class="sourceLineNo">504</span> void letRegionServersShutdown() {<a name="line.504"></a> -<span class="sourceLineNo">505</span> long previousLogTime = 0;<a name="line.505"></a> -<span class="sourceLineNo">506</span> ServerName sn = master.getServerName();<a name="line.506"></a> -<span class="sourceLineNo">507</span> ZKWatcher zkw = master.getZooKeeper();<a name="line.507"></a> -<span class="sourceLineNo">508</span> int onlineServersCt;<a name="line.508"></a> -<span class="sourceLineNo">509</span> while ((onlineServersCt = onlineServers.size()) > 0){<a name="line.509"></a> -<span class="sourceLineNo">510</span><a name="line.510"></a> -<span class="sourceLineNo">511</span> if (System.currentTimeMillis() > (previousLogTime + 1000)) {<a name="line.511"></a> -<span class="sourceLineNo">512</span> Set<ServerName> remainingServers = onlineServers.keySet();<a name="line.512"></a> -<span class="sourceLineNo">513</span> synchronized (onlineServers) {<a name="line.513"></a> -<span class="sourceLineNo">514</span> if (remainingServers.size() == 1 && remainingServers.contains(sn)) {<a name="line.514"></a> -<span class="sourceLineNo">515</span> // Master will delete itself 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<TRUNCATED>
