You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by mi...@apache.org on 2015/11/29 22:17:44 UTC
[31/51] [partial] hbase git commit: Published site at
3bac31b2a49bca153df3b47a198667828b61f36e.
http://git-wip-us.apache.org/repos/asf/hbase/blob/ef7355e1/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 11e91fd..a97ceb4 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
@@ -151,1030 +151,1027 @@
<span class="sourceLineNo">143</span> private final Map<ServerName, AdminService.BlockingInterface> rsAdmins =<a name="line.143"></a>
<span class="sourceLineNo">144</span> new HashMap<ServerName, AdminService.BlockingInterface>();<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> * List of region servers <ServerName> that should not get any more new<a name="line.147"></a>
-<span class="sourceLineNo">148</span> * regions.<a name="line.148"></a>
-<span class="sourceLineNo">149</span> */<a name="line.149"></a>
-<span class="sourceLineNo">150</span> private final ArrayList<ServerName> drainingServers =<a name="line.150"></a>
-<span class="sourceLineNo">151</span> new ArrayList<ServerName>();<a name="line.151"></a>
-<span class="sourceLineNo">152</span><a name="line.152"></a>
-<span class="sourceLineNo">153</span> private final Server master;<a name="line.153"></a>
-<span class="sourceLineNo">154</span> private final MasterServices services;<a name="line.154"></a>
-<span class="sourceLineNo">155</span> private final ClusterConnection connection;<a name="line.155"></a>
-<span class="sourceLineNo">156</span><a name="line.156"></a>
-<span class="sourceLineNo">157</span> private final DeadServer deadservers = new DeadServer();<a name="line.157"></a>
+<span class="sourceLineNo">146</span> /** List of region servers that should not get any more new regions. */<a name="line.146"></a>
+<span class="sourceLineNo">147</span> private final ArrayList<ServerName> drainingServers =<a name="line.147"></a>
+<span class="sourceLineNo">148</span> new ArrayList<ServerName>();<a name="line.148"></a>
+<span class="sourceLineNo">149</span><a name="line.149"></a>
+<span class="sourceLineNo">150</span> private final Server master;<a name="line.150"></a>
+<span class="sourceLineNo">151</span> private final MasterServices services;<a name="line.151"></a>
+<span class="sourceLineNo">152</span> private final ClusterConnection connection;<a name="line.152"></a>
+<span class="sourceLineNo">153</span><a name="line.153"></a>
+<span class="sourceLineNo">154</span> private final DeadServer deadservers = new DeadServer();<a name="line.154"></a>
+<span class="sourceLineNo">155</span><a name="line.155"></a>
+<span class="sourceLineNo">156</span> private final long maxSkew;<a name="line.156"></a>
+<span class="sourceLineNo">157</span> private final long warningSkew;<a name="line.157"></a>
<span class="sourceLineNo">158</span><a name="line.158"></a>
-<span class="sourceLineNo">159</span> private final long maxSkew;<a name="line.159"></a>
-<span class="sourceLineNo">160</span> private final long warningSkew;<a name="line.160"></a>
-<span class="sourceLineNo">161</span><a name="line.161"></a>
-<span class="sourceLineNo">162</span> private final RetryCounterFactory pingRetryCounterFactory;<a name="line.162"></a>
-<span class="sourceLineNo">163</span><a name="line.163"></a>
-<span class="sourceLineNo">164</span> /**<a name="line.164"></a>
-<span class="sourceLineNo">165</span> * Set of region servers which are dead but not processed immediately. If one<a name="line.165"></a>
-<span class="sourceLineNo">166</span> * server died before master enables ServerShutdownHandler, the server will be<a name="line.166"></a>
-<span class="sourceLineNo">167</span> * added to this set and will be processed through calling<a name="line.167"></a>
-<span class="sourceLineNo">168</span> * {@link ServerManager#processQueuedDeadServers()} by master.<a name="line.168"></a>
-<span class="sourceLineNo">169</span> * <p><a name="line.169"></a>
-<span class="sourceLineNo">170</span> * A dead server is a server instance known to be dead, not listed in the /hbase/rs<a name="line.170"></a>
-<span class="sourceLineNo">171</span> * znode any more. It may have not been submitted to ServerShutdownHandler yet<a name="line.171"></a>
-<span class="sourceLineNo">172</span> * because the handler is not enabled.<a name="line.172"></a>
+<span class="sourceLineNo">159</span> private final RetryCounterFactory pingRetryCounterFactory;<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> * Set of region servers which are dead but not processed immediately. If one<a name="line.162"></a>
+<span class="sourceLineNo">163</span> * server died before master enables ServerShutdownHandler, the server will be<a name="line.163"></a>
+<span class="sourceLineNo">164</span> * added to this set and will be processed through calling<a name="line.164"></a>
+<span class="sourceLineNo">165</span> * {@link ServerManager#processQueuedDeadServers()} by master.<a name="line.165"></a>
+<span class="sourceLineNo">166</span> * <p><a name="line.166"></a>
+<span class="sourceLineNo">167</span> * A dead server is a server instance known to be dead, not listed in the /hbase/rs<a name="line.167"></a>
+<span class="sourceLineNo">168</span> * znode any more. It may have not been submitted to ServerShutdownHandler yet<a name="line.168"></a>
+<span class="sourceLineNo">169</span> * because the handler is not enabled.<a name="line.169"></a>
+<span class="sourceLineNo">170</span> * <p><a name="line.170"></a>
+<span class="sourceLineNo">171</span> * A dead server, which has been submitted to ServerShutdownHandler while the<a name="line.171"></a>
+<span class="sourceLineNo">172</span> * handler is not enabled, is queued up.<a name="line.172"></a>
<span class="sourceLineNo">173</span> * <p><a name="line.173"></a>
-<span class="sourceLineNo">174</span> * A dead server, which has been submitted to ServerShutdownHandler while the<a name="line.174"></a>
-<span class="sourceLineNo">175</span> * handler is not enabled, is queued up.<a name="line.175"></a>
-<span class="sourceLineNo">176</span> * <p><a name="line.176"></a>
-<span class="sourceLineNo">177</span> * So this is a set of region servers known to be dead but not submitted to<a name="line.177"></a>
-<span class="sourceLineNo">178</span> * ServerShutdownHandler for processing yet.<a name="line.178"></a>
-<span class="sourceLineNo">179</span> */<a name="line.179"></a>
-<span class="sourceLineNo">180</span> private Set<ServerName> queuedDeadServers = new HashSet<ServerName>();<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> * Set of region servers which are dead and submitted to ServerShutdownHandler to process but not<a name="line.183"></a>
-<span class="sourceLineNo">184</span> * fully processed immediately.<a name="line.184"></a>
-<span class="sourceLineNo">185</span> * <p><a name="line.185"></a>
-<span class="sourceLineNo">186</span> * If one server died before assignment manager finished the failover cleanup, the server will be<a name="line.186"></a>
-<span class="sourceLineNo">187</span> * added to this set and will be processed through calling<a name="line.187"></a>
-<span class="sourceLineNo">188</span> * {@link ServerManager#processQueuedDeadServers()} by assignment manager.<a name="line.188"></a>
-<span class="sourceLineNo">189</span> * <p><a name="line.189"></a>
-<span class="sourceLineNo">190</span> * The Boolean value indicates whether log split is needed inside ServerShutdownHandler<a name="line.190"></a>
-<span class="sourceLineNo">191</span> * <p><a name="line.191"></a>
-<span class="sourceLineNo">192</span> * ServerShutdownHandler processes a dead server submitted to the handler after the handler is<a name="line.192"></a>
-<span class="sourceLineNo">193</span> * enabled. It may not be able to complete the processing because meta is not yet online or master<a name="line.193"></a>
-<span class="sourceLineNo">194</span> * is currently in startup mode. In this case, the dead server will be parked in this set<a name="line.194"></a>
-<span class="sourceLineNo">195</span> * temporarily.<a name="line.195"></a>
-<span class="sourceLineNo">196</span> */<a name="line.196"></a>
-<span class="sourceLineNo">197</span> private Map<ServerName, Boolean> requeuedDeadServers<a name="line.197"></a>
-<span class="sourceLineNo">198</span> = new ConcurrentHashMap<ServerName, Boolean>();<a name="line.198"></a>
+<span class="sourceLineNo">174</span> * So this is a set of region servers known to be dead but not submitted to<a name="line.174"></a>
+<span class="sourceLineNo">175</span> * ServerShutdownHandler for processing yet.<a name="line.175"></a>
+<span class="sourceLineNo">176</span> */<a name="line.176"></a>
+<span class="sourceLineNo">177</span> private Set<ServerName> queuedDeadServers = new HashSet<ServerName>();<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> * Set of region servers which are dead and submitted to ServerShutdownHandler to process but not<a name="line.180"></a>
+<span class="sourceLineNo">181</span> * fully processed immediately.<a name="line.181"></a>
+<span class="sourceLineNo">182</span> * <p><a name="line.182"></a>
+<span class="sourceLineNo">183</span> * If one server died before assignment manager finished the failover cleanup, the server will be<a name="line.183"></a>
+<span class="sourceLineNo">184</span> * added to this set and will be processed through calling<a name="line.184"></a>
+<span class="sourceLineNo">185</span> * {@link ServerManager#processQueuedDeadServers()} by assignment manager.<a name="line.185"></a>
+<span class="sourceLineNo">186</span> * <p><a name="line.186"></a>
+<span class="sourceLineNo">187</span> * The Boolean value indicates whether log split is needed inside ServerShutdownHandler<a name="line.187"></a>
+<span class="sourceLineNo">188</span> * <p><a name="line.188"></a>
+<span class="sourceLineNo">189</span> * ServerShutdownHandler processes a dead server submitted to the handler after the handler is<a name="line.189"></a>
+<span class="sourceLineNo">190</span> * enabled. It may not be able to complete the processing because meta is not yet online or master<a name="line.190"></a>
+<span class="sourceLineNo">191</span> * is currently in startup mode. In this case, the dead server will be parked in this set<a name="line.191"></a>
+<span class="sourceLineNo">192</span> * temporarily.<a name="line.192"></a>
+<span class="sourceLineNo">193</span> */<a name="line.193"></a>
+<span class="sourceLineNo">194</span> private Map<ServerName, Boolean> requeuedDeadServers<a name="line.194"></a>
+<span class="sourceLineNo">195</span> = new ConcurrentHashMap<ServerName, Boolean>();<a name="line.195"></a>
+<span class="sourceLineNo">196</span><a name="line.196"></a>
+<span class="sourceLineNo">197</span> /** Listeners that are called on server events. */<a name="line.197"></a>
+<span class="sourceLineNo">198</span> private List<ServerListener> listeners = new CopyOnWriteArrayList<ServerListener>();<a name="line.198"></a>
<span class="sourceLineNo">199</span><a name="line.199"></a>
-<span class="sourceLineNo">200</span> /** Listeners that are called on server events. */<a name="line.200"></a>
-<span class="sourceLineNo">201</span> private List<ServerListener> listeners = new CopyOnWriteArrayList<ServerListener>();<a name="line.201"></a>
-<span class="sourceLineNo">202</span><a name="line.202"></a>
-<span class="sourceLineNo">203</span> /**<a name="line.203"></a>
-<span class="sourceLineNo">204</span> * Constructor.<a name="line.204"></a>
-<span class="sourceLineNo">205</span> * @param master<a name="line.205"></a>
-<span class="sourceLineNo">206</span> * @param services<a name="line.206"></a>
-<span class="sourceLineNo">207</span> * @throws ZooKeeperConnectionException<a name="line.207"></a>
-<span class="sourceLineNo">208</span> */<a name="line.208"></a>
-<span class="sourceLineNo">209</span> public ServerManager(final Server master, final MasterServices services)<a name="line.209"></a>
-<span class="sourceLineNo">210</span> throws IOException {<a name="line.210"></a>
-<span class="sourceLineNo">211</span> this(master, services, true);<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> ServerManager(final Server master, final MasterServices services,<a name="line.214"></a>
-<span class="sourceLineNo">215</span> final boolean connect) throws IOException {<a name="line.215"></a>
-<span class="sourceLineNo">216</span> this.master = master;<a name="line.216"></a>
-<span class="sourceLineNo">217</span> this.services = services;<a name="line.217"></a>
-<span class="sourceLineNo">218</span> Configuration c = master.getConfiguration();<a name="line.218"></a>
-<span class="sourceLineNo">219</span> maxSkew = c.getLong("hbase.master.maxclockskew", 30000);<a name="line.219"></a>
-<span class="sourceLineNo">220</span> warningSkew = c.getLong("hbase.master.warningclockskew", 10000);<a name="line.220"></a>
-<span class="sourceLineNo">221</span> this.connection = connect ? master.getConnection() : null;<a name="line.221"></a>
-<span class="sourceLineNo">222</span> int pingMaxAttempts = Math.max(1, master.getConfiguration().getInt(<a name="line.222"></a>
-<span class="sourceLineNo">223</span> "hbase.master.maximum.ping.server.attempts", 10));<a name="line.223"></a>
-<span class="sourceLineNo">224</span> int pingSleepInterval = Math.max(1, master.getConfiguration().getInt(<a name="line.224"></a>
-<span class="sourceLineNo">225</span> "hbase.master.ping.server.retry.sleep.interval", 100));<a name="line.225"></a>
-<span class="sourceLineNo">226</span> this.pingRetryCounterFactory = new RetryCounterFactory(pingMaxAttempts, pingSleepInterval);<a name="line.226"></a>
-<span class="sourceLineNo">227</span> }<a name="line.227"></a>
-<span class="sourceLineNo">228</span><a name="line.228"></a>
-<span class="sourceLineNo">229</span> /**<a name="line.229"></a>
-<span class="sourceLineNo">230</span> * Add the listener to the notification list.<a name="line.230"></a>
-<span class="sourceLineNo">231</span> * @param listener The ServerListener to register<a name="line.231"></a>
-<span class="sourceLineNo">232</span> */<a name="line.232"></a>
-<span class="sourceLineNo">233</span> public void registerListener(final ServerListener listener) {<a name="line.233"></a>
-<span class="sourceLineNo">234</span> this.listeners.add(listener);<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> /**<a name="line.237"></a>
-<span class="sourceLineNo">238</span> * Remove the listener from the notification list.<a name="line.238"></a>
-<span class="sourceLineNo">239</span> * @param listener The ServerListener to unregister<a name="line.239"></a>
-<span class="sourceLineNo">240</span> */<a name="line.240"></a>
-<span class="sourceLineNo">241</span> public boolean unregisterListener(final ServerListener listener) {<a name="line.241"></a>
-<span class="sourceLineNo">242</span> return this.listeners.remove(listener);<a name="line.242"></a>
-<span class="sourceLineNo">243</span> }<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> * Let the server manager know a new regionserver has come online<a name="line.246"></a>
-<span class="sourceLineNo">247</span> * @param request the startup request<a name="line.247"></a>
-<span class="sourceLineNo">248</span> * @param ia the InetAddress from which request is received<a name="line.248"></a>
-<span class="sourceLineNo">249</span> * @return The ServerName we know this server as.<a name="line.249"></a>
-<span class="sourceLineNo">250</span> * @throws IOException<a name="line.250"></a>
-<span class="sourceLineNo">251</span> */<a name="line.251"></a>
-<span class="sourceLineNo">252</span> ServerName regionServerStartup(RegionServerStartupRequest request, InetAddress ia)<a name="line.252"></a>
-<span class="sourceLineNo">253</span> throws IOException {<a name="line.253"></a>
-<span class="sourceLineNo">254</span> // Test for case where we get a region startup message from a regionserver<a name="line.254"></a>
-<span class="sourceLineNo">255</span> // that has been quickly restarted but whose znode expiration handler has<a name="line.255"></a>
-<span class="sourceLineNo">256</span> // not yet run, or from a server whose fail we are currently processing.<a name="line.256"></a>
-<span class="sourceLineNo">257</span> // Test its host+port combo is present in serverAddresstoServerInfo. If it<a name="line.257"></a>
-<span class="sourceLineNo">258</span> // is, reject the server and trigger its expiration. The next time it comes<a name="line.258"></a>
-<span class="sourceLineNo">259</span> // in, it should have been removed from serverAddressToServerInfo and queued<a name="line.259"></a>
-<span class="sourceLineNo">260</span> // for processing by ProcessServerShutdown.<a name="line.260"></a>
-<span class="sourceLineNo">261</span><a name="line.261"></a>
-<span class="sourceLineNo">262</span> final String hostname = request.hasUseThisHostnameInstead() ?<a name="line.262"></a>
-<span class="sourceLineNo">263</span> request.getUseThisHostnameInstead() :ia.getHostName();<a name="line.263"></a>
-<span class="sourceLineNo">264</span> ServerName sn = ServerName.valueOf(hostname, request.getPort(),<a name="line.264"></a>
-<span class="sourceLineNo">265</span> request.getServerStartCode());<a name="line.265"></a>
-<span class="sourceLineNo">266</span> checkClockSkew(sn, request.getServerCurrentTime());<a name="line.266"></a>
-<span class="sourceLineNo">267</span> checkIsDead(sn, "STARTUP");<a name="line.267"></a>
-<span class="sourceLineNo">268</span> if (!checkAndRecordNewServer(sn, ServerLoad.EMPTY_SERVERLOAD)) {<a name="line.268"></a>
-<span class="sourceLineNo">269</span> LOG.warn("THIS SHOULD NOT HAPPEN, RegionServerStartup"<a name="line.269"></a>
-<span class="sourceLineNo">270</span> + " could not record the server: " + sn);<a name="line.270"></a>
-<span class="sourceLineNo">271</span> }<a name="line.271"></a>
-<span class="sourceLineNo">272</span> return sn;<a name="line.272"></a>
-<span class="sourceLineNo">273</span> }<a name="line.273"></a>
-<span class="sourceLineNo">274</span><a name="line.274"></a>
-<span class="sourceLineNo">275</span> private ConcurrentNavigableMap<byte[], Long> getOrCreateStoreFlushedSequenceId(<a name="line.275"></a>
-<span class="sourceLineNo">276</span> byte[] regionName) {<a name="line.276"></a>
-<span class="sourceLineNo">277</span> ConcurrentNavigableMap<byte[], Long> storeFlushedSequenceId =<a name="line.277"></a>
-<span class="sourceLineNo">278</span> storeFlushedSequenceIdsByRegion.get(regionName);<a name="line.278"></a>
-<span class="sourceLineNo">279</span> if (storeFlushedSequenceId != null) {<a name="line.279"></a>
-<span class="sourceLineNo">280</span> return storeFlushedSequenceId;<a name="line.280"></a>
-<span class="sourceLineNo">281</span> }<a name="line.281"></a>
-<span class="sourceLineNo">282</span> storeFlushedSequenceId = new ConcurrentSkipListMap<byte[], Long>(Bytes.BYTES_COMPARATOR);<a name="line.282"></a>
-<span class="sourceLineNo">283</span> ConcurrentNavigableMap<byte[], Long> alreadyPut =<a name="line.283"></a>
-<span class="sourceLineNo">284</span> storeFlushedSequenceIdsByRegion.putIfAbsent(regionName, storeFlushedSequenceId);<a name="line.284"></a>
-<span class="sourceLineNo">285</span> return alreadyPut == null ? storeFlushedSequenceId : alreadyPut;<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> * Updates last flushed sequence Ids for the regions on server sn<a name="line.288"></a>
-<span class="sourceLineNo">289</span> * @param sn<a name="line.289"></a>
-<span class="sourceLineNo">290</span> * @param hsl<a name="line.290"></a>
-<span class="sourceLineNo">291</span> */<a name="line.291"></a>
-<span class="sourceLineNo">292</span> private void updateLastFlushedSequenceIds(ServerName sn, ServerLoad hsl) {<a name="line.292"></a>
-<span class="sourceLineNo">293</span> Map<byte[], RegionLoad> regionsLoad = hsl.getRegionsLoad();<a name="line.293"></a>
-<span class="sourceLineNo">294</span> for (Entry<byte[], RegionLoad> entry : regionsLoad.entrySet()) {<a name="line.294"></a>
-<span class="sourceLineNo">295</span> byte[] encodedRegionName = Bytes.toBytes(HRegionInfo.encodeRegionName(entry.getKey()));<a name="line.295"></a>
-<span class="sourceLineNo">296</span> Long existingValue = flushedSequenceIdByRegion.get(encodedRegionName);<a name="line.296"></a>
-<span class="sourceLineNo">297</span> long l = entry.getValue().getCompleteSequenceId();<a name="line.297"></a>
-<span class="sourceLineNo">298</span> // Don't let smaller sequence ids override greater sequence ids.<a name="line.298"></a>
-<span class="sourceLineNo">299</span> if (LOG.isTraceEnabled()) {<a name="line.299"></a>
-<span class="sourceLineNo">300</span> LOG.trace(Bytes.toString(encodedRegionName) + ", existingValue=" + existingValue +<a name="line.300"></a>
-<span class="sourceLineNo">301</span> ", completeSequenceId=" + l);<a name="line.301"></a>
-<span class="sourceLineNo">302</span> }<a name="line.302"></a>
-<span class="sourceLineNo">303</span> if (existingValue == null || (l != HConstants.NO_SEQNUM && l > existingValue)) {<a name="line.303"></a>
-<span class="sourceLineNo">304</span> flushedSequenceIdByRegion.put(encodedRegionName, l);<a name="line.304"></a>
-<span class="sourceLineNo">305</span> } else if (l != HConstants.NO_SEQNUM && l < existingValue) {<a name="line.305"></a>
-<span class="sourceLineNo">306</span> LOG.warn("RegionServer " + sn + " indicates a last flushed sequence id ("<a name="line.306"></a>
-<span class="sourceLineNo">307</span> + l + ") that is less than the previous last flushed sequence id ("<a name="line.307"></a>
-<span class="sourceLineNo">308</span> + existingValue + ") for region " + Bytes.toString(entry.getKey()) + " Ignoring.");<a name="line.308"></a>
-<span class="sourceLineNo">309</span> }<a name="line.309"></a>
-<span class="sourceLineNo">310</span> ConcurrentNavigableMap<byte[], Long> storeFlushedSequenceId =<a name="line.310"></a>
-<span class="sourceLineNo">311</span> getOrCreateStoreFlushedSequenceId(encodedRegionName);<a name="line.311"></a>
-<span class="sourceLineNo">312</span> for (StoreSequenceId storeSeqId : entry.getValue().getStoreCompleteSequenceId()) {<a name="line.312"></a>
-<span class="sourceLineNo">313</span> byte[] family = storeSeqId.getFamilyName().toByteArray();<a name="line.313"></a>
-<span class="sourceLineNo">314</span> existingValue = storeFlushedSequenceId.get(family);<a name="line.314"></a>
-<span class="sourceLineNo">315</span> l = storeSeqId.getSequenceId();<a name="line.315"></a>
-<span class="sourceLineNo">316</span> if (LOG.isTraceEnabled()) {<a name="line.316"></a>
-<span class="sourceLineNo">317</span> LOG.trace(Bytes.toString(encodedRegionName) + ", family=" + Bytes.toString(family) +<a name="line.317"></a>
-<span class="sourceLineNo">318</span> ", existingValue=" + existingValue + ", completeSequenceId=" + l);<a name="line.318"></a>
-<span class="sourceLineNo">319</span> }<a name="line.319"></a>
-<span class="sourceLineNo">320</span> // Don't let smaller sequence ids override greater sequence ids.<a name="line.320"></a>
-<span class="sourceLineNo">321</span> if (existingValue == null || (l != HConstants.NO_SEQNUM && l > existingValue.longValue())) {<a name="line.321"></a>
-<span class="sourceLineNo">322</span> storeFlushedSequenceId.put(family, l);<a name="line.322"></a>
-<span class="sourceLineNo">323</span> }<a name="line.323"></a>
-<span class="sourceLineNo">324</span> }<a name="line.324"></a>
-<span class="sourceLineNo">325</span> }<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> void regionServerReport(ServerName sn,<a name="line.328"></a>
-<span class="sourceLineNo">329</span> ServerLoad sl) throws YouAreDeadException {<a name="line.329"></a>
-<span class="sourceLineNo">330</span> checkIsDead(sn, "REPORT");<a name="line.330"></a>
-<span class="sourceLineNo">331</span> if (null == this.onlineServers.replace(sn, sl)) {<a name="line.331"></a>
-<span class="sourceLineNo">332</span> // Already have this host+port combo and its just different start code?<a name="line.332"></a>
-<span class="sourceLineNo">333</span> // Just let the server in. Presume master joining a running cluster.<a name="line.333"></a>
-<span class="sourceLineNo">334</span> // recordNewServer is what happens at the end of reportServerStartup.<a name="line.334"></a>
-<span class="sourceLineNo">335</span> // The only thing we are skipping is passing back to the regionserver<a name="line.335"></a>
-<span class="sourceLineNo">336</span> // the ServerName to use. Here we presume a master has already done<a name="line.336"></a>
-<span class="sourceLineNo">337</span> // that so we'll press on with whatever it gave us for ServerName.<a name="line.337"></a>
-<span class="sourceLineNo">338</span> if (!checkAndRecordNewServer(sn, sl)) {<a name="line.338"></a>
-<span class="sourceLineNo">339</span> LOG.info("RegionServerReport ignored, could not record the server: " + sn);<a name="line.339"></a>
-<span class="sourceLineNo">340</span> return; // Not recorded, so no need to move on<a name="line.340"></a>
-<span class="sourceLineNo">341</span> }<a name="line.341"></a>
-<span class="sourceLineNo">342</span> }<a name="line.342"></a>
-<span class="sourceLineNo">343</span> updateLastFlushedSequenceIds(sn, sl);<a name="line.343"></a>
-<span class="sourceLineNo">344</span> }<a name="line.344"></a>
-<span class="sourceLineNo">345</span><a name="line.345"></a>
-<span class="sourceLineNo">346</span> /**<a name="line.346"></a>
-<span class="sourceLineNo">347</span> * Check is a server of same host and port already exists,<a name="line.347"></a>
-<span class="sourceLineNo">348</span> * if not, or the existed one got a smaller start code, record it.<a name="line.348"></a>
-<span class="sourceLineNo">349</span> *<a name="line.349"></a>
-<span class="sourceLineNo">350</span> * @param serverName the server to check and record<a name="line.350"></a>
-<span class="sourceLineNo">351</span> * @param sl the server load on the server<a name="line.351"></a>
-<span class="sourceLineNo">352</span> * @return true if the server is recorded, otherwise, false<a name="line.352"></a>
-<span class="sourceLineNo">353</span> */<a name="line.353"></a>
-<span class="sourceLineNo">354</span> boolean checkAndRecordNewServer(<a name="line.354"></a>
-<span class="sourceLineNo">355</span> final ServerName serverName, final ServerLoad sl) {<a name="line.355"></a>
-<span class="sourceLineNo">356</span> ServerName existingServer = null;<a name="line.356"></a>
-<span class="sourceLineNo">357</span> synchronized (this.onlineServers) {<a name="line.357"></a>
-<span class="sourceLineNo">358</span> existingServer = findServerWithSameHostnamePortWithLock(serverName);<a name="line.358"></a>
-<span class="sourceLineNo">359</span> if (existingServer != null && (existingServer.getStartcode() > serverName.getStartcode())) {<a name="line.359"></a>
-<span class="sourceLineNo">360</span> LOG.info("Server serverName=" + serverName + " rejected; we already have "<a name="line.360"></a>
-<span class="sourceLineNo">361</span> + existingServer.toString() + " registered with same hostname and port");<a name="line.361"></a>
-<span class="sourceLineNo">362</span> return false;<a name="line.362"></a>
-<span class="sourceLineNo">363</span> }<a name="line.363"></a>
-<span class="sourceLineNo">364</span> recordNewServerWithLock(serverName, sl);<a name="line.364"></a>
-<span class="sourceLineNo">365</span> }<a name="line.365"></a>
-<span class="sourceLineNo">366</span><a name="line.366"></a>
-<span class="sourceLineNo">367</span> // Tell our listeners that a server was added<a name="line.367"></a>
-<span class="sourceLineNo">368</span> if (!this.listeners.isEmpty()) {<a name="line.368"></a>
-<span class="sourceLineNo">369</span> for (ServerListener listener : this.listeners) {<a name="line.369"></a>
-<span class="sourceLineNo">370</span> listener.serverAdded(serverName);<a name="line.370"></a>
-<span class="sourceLineNo">371</span> }<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> // Note that we assume that same ts means same server, and don't expire in that case.<a name="line.374"></a>
-<span class="sourceLineNo">375</span> // TODO: ts can theoretically collide due to clock shifts, so this is a bit hacky.<a name="line.375"></a>
-<span class="sourceLineNo">376</span> if (existingServer != null && (existingServer.getStartcode() < serverName.getStartcode())) {<a name="line.376"></a>
-<span class="sourceLineNo">377</span> LOG.info("Triggering server recovery; existingServer " +<a name="line.377"></a>
-<span class="sourceLineNo">378</span> existingServer + " looks stale, new server:" + serverName);<a name="line.378"></a>
-<span class="sourceLineNo">379</span> expireServer(existingServer);<a name="line.379"></a>
-<span class="sourceLineNo">380</span> }<a name="line.380"></a>
-<span class="sourceLineNo">381</span> return true;<a name="line.381"></a>
-<span class="sourceLineNo">382</span> }<a name="line.382"></a>
-<span class="sourceLineNo">383</span><a name="line.383"></a>
-<span class="sourceLineNo">384</span> /**<a name="line.384"></a>
-<span class="sourceLineNo">385</span> * Checks if the clock skew between the server and the master. If the clock skew exceeds the<a name="line.385"></a>
-<span class="sourceLineNo">386</span> * configured max, it will throw an exception; if it exceeds the configured warning threshold,<a name="line.386"></a>
-<span class="sourceLineNo">387</span> * it will log a warning but start normally.<a name="line.387"></a>
-<span class="sourceLineNo">388</span> * @param serverName Incoming servers's name<a name="line.388"></a>
-<span class="sourceLineNo">389</span> * @param serverCurrentTime<a name="line.389"></a>
-<span class="sourceLineNo">390</span> * @throws ClockOutOfSyncException if the skew exceeds the configured max value<a name="line.390"></a>
-<span class="sourceLineNo">391</span> */<a name="line.391"></a>
-<span class="sourceLineNo">392</span> private void checkClockSkew(final ServerName serverName, final long serverCurrentTime)<a name="line.392"></a>
-<span class="sourceLineNo">393</span> throws ClockOutOfSyncException {<a name="line.393"></a>
-<span class="sourceLineNo">394</span> long skew = Math.abs(System.currentTimeMillis() - serverCurrentTime);<a name="line.394"></a>
-<span class="sourceLineNo">395</span> if (skew > maxSkew) {<a name="line.395"></a>
-<span class="sourceLineNo">396</span> String message = "Server " + serverName + " has been " +<a name="line.396"></a>
-<span class="sourceLineNo">397</span> "rejected; Reported time is too far out of sync with master. " +<a name="line.397"></a>
-<span class="sourceLineNo">398</span> "Time difference of " + skew + "ms > max allowed of " + maxSkew + "ms";<a name="line.398"></a>
-<span class="sourceLineNo">399</span> LOG.warn(message);<a name="line.399"></a>
-<span class="sourceLineNo">400</span> throw new ClockOutOfSyncException(message);<a name="line.400"></a>
-<span class="sourceLineNo">401</span> } else if (skew > warningSkew){<a name="line.401"></a>
-<span class="sourceLineNo">402</span> String message = "Reported time for server " + serverName + " is out of sync with master " +<a name="line.402"></a>
-<span class="sourceLineNo">403</span> "by " + skew + "ms. (Warning threshold is " + warningSkew + "ms; " +<a name="line.403"></a>
-<span class="sourceLineNo">404</span> "error threshold is " + maxSkew + "ms)";<a name="line.404"></a>
-<span class="sourceLineNo">405</span> LOG.warn(message);<a name="line.405"></a>
-<span class="sourceLineNo">406</span> }<a name="line.406"></a>
-<span class="sourceLineNo">407</span> }<a name="line.407"></a>
-<span class="sourceLineNo">408</span><a name="line.408"></a>
-<span class="sourceLineNo">409</span> /**<a name="line.409"></a>
-<span class="sourceLineNo">410</span> * If this server is on the dead list, reject it with a YouAreDeadException.<a name="line.410"></a>
-<span class="sourceLineNo">411</span> * If it was dead but came back with a new start code, remove the old entry<a name="line.411"></a>
-<span class="sourceLineNo">412</span> * from the dead list.<a name="line.412"></a>
-<span class="sourceLineNo">413</span> * @param serverName<a name="line.413"></a>
-<span class="sourceLineNo">414</span> * @param what START or REPORT<a name="line.414"></a>
-<span class="sourceLineNo">415</span> * @throws org.apache.hadoop.hbase.YouAreDeadException<a name="line.415"></a>
-<span class="sourceLineNo">416</span> */<a name="line.416"></a>
-<span class="sourceLineNo">417</span> private void checkIsDead(final ServerName serverName, final String what)<a name="line.417"></a>
-<span class="sourceLineNo">418</span> throws YouAreDeadException {<a name="line.418"></a>
-<span class="sourceLineNo">419</span> if (this.deadservers.isDeadServer(serverName)) {<a name="line.419"></a>
-<span class="sourceLineNo">420</span> // host name, port and start code all match with existing one of the<a name="line.420"></a>
-<span class="sourceLineNo">421</span> // dead servers. So, this server must be dead.<a name="line.421"></a>
-<span class="sourceLineNo">422</span> String message = "Server " + what + " rejected; currently processing " +<a name="line.422"></a>
-<span class="sourceLineNo">423</span> serverName + " as dead server";<a name="line.423"></a>
-<span class="sourceLineNo">424</span> LOG.debug(message);<a name="line.424"></a>
-<span class="sourceLineNo">425</span> throw new YouAreDeadException(message);<a name="line.425"></a>
-<span class="sourceLineNo">426</span> }<a name="line.426"></a>
-<span class="sourceLineNo">427</span> // remove dead server with same hostname and port of newly checking in rs after master<a name="line.427"></a>
-<span class="sourceLineNo">428</span> // initialization.See HBASE-5916 for more information.<a name="line.428"></a>
-<span class="sourceLineNo">429</span> if ((this.services == null || ((HMaster) this.services).isInitialized())<a name="line.429"></a>
-<span class="sourceLineNo">430</span> && this.deadservers.cleanPreviousInstance(serverName)) {<a name="line.430"></a>
-<span class="sourceLineNo">431</span> // This server has now become alive after we marked it as dead.<a name="line.431"></a>
-<span class="sourceLineNo">432</span> // We removed it's previous entry from the dead list to reflect it.<a name="line.432"></a>
-<span class="sourceLineNo">433</span> LOG.debug(what + ":" + " Server " + serverName + " came back up," +<a name="line.433"></a>
-<span class="sourceLineNo">434</span> " removed it from the dead servers list");<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><a name="line.437"></a>
-<span class="sourceLineNo">438</span> /**<a name="line.438"></a>
-<span class="sourceLineNo">439</span> * Assumes onlineServers is locked.<a name="line.439"></a>
-<span class="sourceLineNo">440</span> * @return ServerName with matching hostname and port.<a name="line.440"></a>
-<span class="sourceLineNo">441</span> */<a name="line.441"></a>
-<span class="sourceLineNo">442</span> private ServerName findServerWithSameHostnamePortWithLock(<a name="line.442"></a>
-<span class="sourceLineNo">443</span> final ServerName serverName) {<a name="line.443"></a>
-<span class="sourceLineNo">444</span> for (ServerName sn: this.onlineServers.keySet()) {<a name="line.444"></a>
-<span class="sourceLineNo">445</span> if (ServerName.isSameHostnameAndPort(serverName, sn)) return sn;<a name="line.445"></a>
-<span class="sourceLineNo">446</span> }<a name="line.446"></a>
-<span class="sourceLineNo">447</span> return null;<a name="line.447"></a>
-<span class="sourceLineNo">448</span> }<a name="line.448"></a>
-<span class="sourceLineNo">449</span><a name="line.449"></a>
-<span class="sourceLineNo">450</span> /**<a name="line.450"></a>
-<span class="sourceLineNo">451</span> * Adds the onlineServers list. onlineServers should be locked.<a name="line.451"></a>
-<span class="sourceLineNo">452</span> * @param serverName The remote servers name.<a name="line.452"></a>
-<span class="sourceLineNo">453</span> * @param sl<a name="line.453"></a>
-<span class="sourceLineNo">454</span> * @return Server load from the removed server, if any.<a name="line.454"></a>
-<span class="sourceLineNo">455</span> */<a name="line.455"></a>
-<span class="sourceLineNo">456</span> @VisibleForTesting<a name="line.456"></a>
-<span class="sourceLineNo">457</span> void recordNewServerWithLock(final ServerName serverName, final ServerLoad sl) {<a name="line.457"></a>
-<span class="sourceLineNo">458</span> LOG.info("Registering server=" + serverName);<a name="line.458"></a>
-<span class="sourceLineNo">459</span> this.onlineServers.put(serverName, sl);<a name="line.459"></a>
-<span class="sourceLineNo">460</span> this.rsAdmins.remove(serverName);<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> public RegionStoreSequenceIds getLastFlushedSequenceId(byte[] encodedRegionName) {<a name="line.463"></a>
-<span class="sourceLineNo">464</span> RegionStoreSequenceIds.Builder builder = RegionStoreSequenceIds.newBuilder();<a name="line.464"></a>
-<span class="sourceLineNo">465</span> Long seqId = flushedSequenceIdByRegion.get(encodedRegionName);<a name="line.465"></a>
-<span class="sourceLineNo">466</span> builder.setLastFlushedSequenceId(seqId != null ? seqId.longValue() : HConstants.NO_SEQNUM);<a name="line.466"></a>
-<span class="sourceLineNo">467</span> Map<byte[], Long> storeFlushedSequenceId =<a name="line.467"></a>
-<span class="sourceLineNo">468</span> storeFlushedSequenceIdsByRegion.get(encodedRegionName);<a name="line.468"></a>
-<span class="sourceLineNo">469</span> if (storeFlushedSequenceId != null) {<a name="line.469"></a>
-<span class="sourceLineNo">470</span> for (Map.Entry<byte[], Long> entry : storeFlushedSequenceId.entrySet()) {<a name="line.470"></a>
-<span class="sourceLineNo">471</span> builder.addStoreSequenceId(StoreSequenceId.newBuilder()<a name="line.471"></a>
-<span class="sourceLineNo">472</span> .setFamilyName(ByteString.copyFrom(entry.getKey()))<a name="line.472"></a>
-<span class="sourceLineNo">473</span> .setSequenceId(entry.getValue().longValue()).build());<a name="line.473"></a>
-<span class="sourceLineNo">474</span> }<a name="line.474"></a>
-<span class="sourceLineNo">475</span> }<a name="line.475"></a>
-<span class="sourceLineNo">476</span> return builder.build();<a name="line.476"></a>
-<span class="sourceLineNo">477</span> }<a name="line.477"></a>
-<span class="sourceLineNo">478</span><a name="line.478"></a>
-<span class="sourceLineNo">479</span> /**<a name="line.479"></a>
-<span class="sourceLineNo">480</span> * @param serverName<a name="line.480"></a>
-<span class="sourceLineNo">481</span> * @return ServerLoad if serverName is known else null<a name="line.481"></a>
-<span class="sourceLineNo">482</span> */<a name="line.482"></a>
-<span class="sourceLineNo">483</span> public ServerLoad getLoad(final ServerName serverName) {<a name="line.483"></a>
-<span class="sourceLineNo">484</span> return this.onlineServers.get(serverName);<a name="line.484"></a>
-<span class="sourceLineNo">485</span> }<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> * Compute the average load across all region servers.<a name="line.488"></a>
-<span class="sourceLineNo">489</span> * Currently, this uses a very naive computation - just uses the number of<a name="line.489"></a>
-<span class="sourceLineNo">490</span> * regions being served, ignoring stats about number of requests.<a name="line.490"></a>
-<span class="sourceLineNo">491</span> * @return the average load<a name="line.491"></a>
-<span class="sourceLineNo">492</span> */<a name="line.492"></a>
-<span class="sourceLineNo">493</span> public double getAverageLoad() {<a name="line.493"></a>
-<span class="sourceLineNo">494</span> int totalLoad = 0;<a name="line.494"></a>
-<span class="sourceLineNo">495</span> int numServers = 0;<a name="line.495"></a>
-<span class="sourceLineNo">496</span> for (ServerLoad sl: this.onlineServers.values()) {<a name="line.496"></a>
-<span class="sourceLineNo">497</span> numServers++;<a name="line.497"></a>
-<span class="sourceLineNo">498</span> totalLoad += sl.getNumberOfRegions();<a name="line.498"></a>
-<span class="sourceLineNo">499</span> }<a name="line.499"></a>
-<span class="sourceLineNo">500</span> return numServers == 0 ? 0 :<a name="line.500"></a>
-<span class="sourceLineNo">501</span> (double)totalLoad / (double)numServers;<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> /** @return the count of active regionservers */<a name="line.504"></a>
-<span class="sourceLineNo">505</span> public int countOfRegionServers() {<a name="line.505"></a>
-<span class="sourceLineNo">506</span> // Presumes onlineServers is a concurrent map<a name="line.506"></a>
-<span class="sourceLineNo">507</span> return this.onlineServers.size();<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> /**<a name="line.510"></a>
-<span class="sourceLineNo">511</span> * @return Read-only map of servers to serverinfo<a name="line.511"></a>
-<span class="sourceLineNo">512</span> */<a name="line.512"></a>
-<span class="sourceLineNo">513</span> public Map<ServerName, ServerLoad> getOnlineServers() {<a name="line.513"></a>
-<span class="sourceLineNo">514</span> // Presumption is that iterating the returned Map is OK.<a name="line.514"></a>
-<span class="sourceLineNo">515</span> synchronized (this.onlineServers) {<a name="line.515"></a>
-<span class="sourceLineNo">516</span> return Collections.unmodifiableMap(this.onlineServers);<a name="line.516"></a>
-<span class="sourceLineNo">517</span> }<a name="line.517"></a>
-<span class="sourceLineNo">518</span> }<a name="line.518"></a>
-<span class="sourceLineNo">519</span><a name="line.519"></a>
-<span class="sourceLineNo">520</span><a name="line.520"></a>
-<span class="sourceLineNo">521</span> public DeadServer getDeadServers() {<a name="line.521"></a>
-<span class="sourceLineNo">522</span> return this.deadservers;<a name="line.522"></a>
-<span class="sourceLineNo">523</span> }<a name="line.523"></a>
-<span class="sourceLineNo">524</span><a name="line.524"></a>
-<span class="sourceLineNo">525</span> /**<a name="line.525"></a>
-<span class="sourceLineNo">526</span> * Checks if any dead servers are currently in progress.<a name="line.526"></a>
-<span class="sourceLineNo">527</span> * @return true if any RS are being processed as dead, false if not<a name="line.527"></a>
-<span class="sourceLineNo">528</span> */<a name="line.528"></a>
-<span class="sourceLineNo">529</span> public boolean areDeadServersInProgress() {<a name="line.529"></a>
-<span class="sourceLineNo">530</span> return this.deadservers.areDeadServersInProgress();<a name="line.530"></a>
-<span class="sourceLineNo">531</span> }<a name="line.531"></a>
-<span class="sourceLineNo">532</span><a name="line.532"></a>
-<span class="sourceLineNo">533</span> void letRegionServersShutdown() {<a name="line.533"></a>
-<span class="sourceLineNo">534</span> long previousLogTime = 0;<a name="line.534"></a>
-<span class="sourceLineNo">535</span> ServerName sn = master.getServerName();<a name="line.535"></a>
-<span class="sourceLineNo">536</span> ZooKeeperWatcher zkw = master.getZooKeeper();<a name="line.536"></a>
-<span class="sourceLineNo">537</span> int onlineServersCt;<a name="line.537"></a>
-<span class="sourceLineNo">538</span> while ((onlineServersCt = onlineServers.size()) > 0){<a name="line.538"></a>
-<span class="sourceLineNo">539</span><a name="line.539"></a>
-<span class="sourceLineNo">540</span> if (System.currentTimeMillis() > (previousLogTime + 1000)) {<a name="line.540"></a>
-<span class="sourceLineNo">541</span> Set<ServerName> remainingServers = onlineServers.keySet();<a name="line.541"></a>
-<span class="sourceLineNo">542</span> synchronized (onlineServers) {<a name="line.542"></a>
-<span class="sourceLineNo">543</span> if (remainingServers.size() == 1 && remainingServers.contains(sn)) {<a name="line.543"></a>
-<span class="sourceLineNo">544</span> // Master will delete itself later.<a name="line.544"></a>
-<span class="sourceLineNo">545</span> return;<a name="line.545"></a>
-<span class="sourceLineNo">546</span> }<a name="line.546"></a>
-<span class="sourceLineNo">547</span> }<a name="line.547"></a>
-<span class="sourceLineNo">548</span> StringBuilder sb = new StringBuilder();<a name="line.548"></a>
-<span class="sourceLineNo">549</span> // It's ok here to not sync on onlineServers - merely logging<a name="line.549"></a>
-<span class="sourceLineNo">550</span> for (ServerName key : remainingServers) {<a name="line.550"></a>
-<span class="sourceLineNo">551</span> if (sb.length() > 0) {<a name="line.551"></a>
-<span class="sourceLineNo">552</span> sb.append(", ");<a name="line.552"></a>
-<span class="sourceLineNo">553</span> }<a name="line.553"></a>
-<span class="sourceLineNo">554</span> sb.append(key);<a name="line.554"></a>
-<span class="sourceLineNo">555</span> }<a name="line.555"></a>
-<span class="sourceLineNo">556</span> LOG.info("Waiting on regionserver(s) to go down " + sb.toString());<a name="line.556"></a>
-<span class="sourceLineNo">557</span> previousLogTime = System.currentTimeMillis();<a name="line.557"></a>
-<span class="sourceLineNo">558</span> }<a name="line.558"></a>
-<span class="sourceLineNo">559</span><a name="line.559"></a>
-<span class="sourceLineNo">560</span> try {<a name="line.560"></a>
-<span class="sourceLineNo">561</span> List<String> servers = ZKUtil.listChildrenNoWatch(zkw, zkw.rsZNode);<a name="line.561"></a>
-<span class="sourceLineNo">562</span> if (servers == null || servers.size() == 0 || (servers.size() == 1<a name="line.562"></a>
-<span class="sourceLineNo">563</span> && servers.contains(sn.toString()))) {<a name="line.563"></a>
-<span class="sourceLineNo">564</span> LOG.info("ZK shows there is only the master self online, exiting now");<a name="line.564"></a>
-<span class="sourceLineNo">565</span> // Master could have lost some ZK events, no need to wait more.<a name="line.565"></a>
-<span class="sourceLineNo">566</span> break;<a name="line.566"></a>
-<span class="sourceLineNo">567</span> }<a name="line.567"></a>
-<span class="sourceLineNo">568</span> } catch (KeeperException ke) {<a name="line.568"></a>
-<span class="sourceLineNo">569</span> LOG.warn("Failed to list regionservers", ke);<a name="line.569"></a>
-<span class="sourceLineNo">570</span> // ZK is malfunctioning, don't hang here<a name="line.570"></a>
-<span class="sourceLineNo">571</span> break;<a name="line.571"></a>
-<span class="sourceLineNo">572</span> }<a name="line.572"></a>
-<span class="sourceLineNo">573</span> synchronized (onlineServers) {<a name="line.573"></a>
-<span class="sourceLineNo">574</span> try {<a name="line.574"></a>
-<span class="sourceLineNo">575</span> if (onlineServersCt == onlineServers.size()) onlineServers.wait(100);<a name="line.575"></a>
-<span class="sourceLineNo">576</span> } catch (InterruptedException ignored) {<a name="line.576"></a>
-<span class="sourceLineNo">577</span> // continue<a name="line.577"></a>
-<span class="sourceLineNo">578</span> }<a name="line.578"></a>
-<span class="sourceLineNo">579</span> }<a name="line.579"></a>
-<span class="sourceLineNo">580</span> }<a name="line.580"></a>
-<span class="sourceLineNo">581</span> }<a name="line.581"></a>
-<span class="sourceLineNo">582</span><a name="line.582"></a>
-<span class="sourceLineNo">583</span> /*<a name="line.583"></a>
-<span class="sourceLineNo">584</span> * Expire the passed server. Add it to list of dead servers and queue a<a name="line.584"></a>
-<span class="sourceLineNo">585</span> * shutdown processing.<a name="line.585"></a>
-<span class="sourceLineNo">586</span> */<a name="line.586"></a>
-<span class="sourceLineNo">587</span> public synchronized void expireServer(final ServerName serverName) {<a name="line.587"></a>
-<span class="sourceLineNo">588</span> if (serverName.equals(master.getServerName())) {<a name="line.588"></a>
-<span class="sourceLineNo">589</span> if (!(master.isAborted() || master.isStopped())) {<a name="line.589"></a>
-<span class="sourceLineNo">590</span> master.stop("We lost our znode?");<a name="line.590"></a>
-<span class="sourceLineNo">591</span> }<a name="line.591"></a>
-<span class="sourceLineNo">592</span> return;<a name="line.592"></a>
-<span class="sourceLineNo">593</span> }<a name="line.593"></a>
-<span class="sourceLineNo">594</span> if (!services.isServerCrashProcessingEnabled()) {<a name="line.594"></a>
-<span class="sourceLineNo">595</span> LOG.info("Master doesn't enable ServerShutdownHandler during initialization, "<a name="line.595"></a>
-<span class="sourceLineNo">596</span> + "delay expiring server " + serverName);<a name="line.596"></a>
-<span class="sourceLineNo">597</span> this.queuedDeadServers.add(serverName);<a name="line.597"></a>
-<span class="sourceLineNo">598</span> return;<a name="line.598"></a>
-<span class="sourceLineNo">599</span> }<a name="line.599"></a>
-<span class="sourceLineNo">600</span> if (this.deadservers.isDeadServer(serverName)) {<a name="line.600"></a>
-<span class="sourceLineNo">601</span> // TODO: Can this happen? It shouldn't be online in this case?<a name="line.601"></a>
-<span class="sourceLineNo">602</span> LOG.warn("Expiration of " + serverName +<a name="line.602"></a>
-<span class="sourceLineNo">603</span> " but server shutdown already in progress");<a name="line.603"></a>
-<span class="sourceLineNo">604</span> return;<a name="line.604"></a>
-<span class="sourceLineNo">605</span> }<a name="line.605"></a>
-<span class="sourceLineNo">606</span> moveFromOnelineToDeadServers(serverName);<a name="line.606"></a>
-<span class="sourceLineNo">607</span><a name="line.607"></a>
-<span class="sourceLineNo">608</span> // If cluster is going down, yes, servers are going to be expiring; don't<a name="line.608"></a>
-<span class="sourceLineNo">609</span> // process as a dead server<a name="line.609"></a>
-<span class="sourceLineNo">610</span> if (this.clusterShutdown) {<a name="line.610"></a>
-<span class="sourceLineNo">611</span> LOG.info("Cluster shutdown set; " + serverName +<a name="line.611"></a>
-<span class="sourceLineNo">612</span> " expired; onlineServers=" + this.onlineServers.size());<a name="line.612"></a>
-<span class="sourceLineNo">613</span> if (this.onlineServers.isEmpty()) {<a name="line.613"></a>
-<span class="sourceLineNo">614</span> master.stop("Cluster shutdown set; onlineServer=0");<a name="line.614"></a>
-<span class="sourceLineNo">615</span> }<a name="line.615"></a>
-<span class="sourceLineNo">616</span> return;<a name="line.616"></a>
-<span class="sourceLineNo">617</span> }<a name="line.617"></a>
-<span class="sourceLineNo">618</span><a name="line.618"></a>
-<span class="sourceLineNo">619</span> boolean carryingMeta = services.getAssignmentManager().isCarryingMeta(serverName);<a name="line.619"></a>
-<span class="sourceLineNo">620</span> this.services.getMasterProcedureExecutor().<a name="line.620"></a>
-<span class="sourceLineNo">621</span> submitProcedure(new ServerCrashProcedure(serverName, true, carryingMeta));<a name="line.621"></a>
-<span class="sourceLineNo">622</span> LOG.debug("Added=" + serverName +<a name="line.622"></a>
-<span class="sourceLineNo">623</span> " to dead servers, submitted shutdown handler to be executed meta=" + carryingMeta);<a name="line.623"></a>
-<span class="sourceLineNo">624</span><a name="line.624"></a>
-<span class="sourceLineNo">625</span> // Tell our listeners that a server was removed<a name="line.625"></a>
-<span class="sourceLineNo">626</span> if (!this.listeners.isEmpty()) {<a name="line.626"></a>
-<span class="sourceLineNo">627</span> for (ServerListener listener : this.listeners) {<a name="line.627"></a>
-<span class="sourceLineNo">628</span> listener.serverRemoved(serverName);<a name="line.628"></a>
-<span class="sourceLineNo">629</span> }<a name="line.629"></a>
-<span class="sourceLineNo">630</span> }<a name="line.630"></a>
-<span class="sourceLineNo">631</span> }<a name="line.631"></a>
-<span class="sourceLineNo">632</span><a name="line.632"></a>
-<span class="sourceLineNo">633</span> @VisibleForTesting<a name="line.633"></a>
-<span class="sourceLineNo">634</span> public void moveFromOnelineToDeadServers(final ServerName sn) {<a name="line.634"></a>
-<span class="sourceLineNo">635</span> synchronized (onlineServers) {<a name="line.635"></a>
-<span class="sourceLineNo">636</span> if (!this.onlineServers.containsKey(sn)) {<a name="line.636"></a>
-<span class="sourceLineNo">637</span> LOG.warn("Expiration of " + sn + " but server not online");<a name="line.637"></a>
-<span class="sourceLineNo">638</span> }<a name="line.638"></a>
-<span class="sourceLineNo">639</span> // Remove the server from the known servers lists and update load info BUT<a name="line.639"></a>
-<span class="sourceLineNo">640</span> // add to deadservers first; do this so it'll show in dead servers list if<a name="line.640"></a>
-<span class="sourceLineNo">641</span> // not in online servers list.<a name="line.641"></a>
-<span class="sourceLineNo">642</span> this.deadservers.add(sn);<a name="line.642"></a>
-<span class="sourceLineNo">643</span> this.onlineServers.remove(sn);<a name="line.643"></a>
-<span class="sourceLineNo">644</span> onlineServers.notifyAll();<a name="line.644"></a>
-<span class="sourceLineNo">645</span> }<a name="line.645"></a>
-<span class="sourceLineNo">646</span> this.rsAdmins.remove(sn);<a name="line.646"></a>
-<span class="sourceLineNo">647</span> }<a name="line.647"></a>
-<span class="sourceLineNo">648</span><a name="line.648"></a>
-<span class="sourceLineNo">649</span> public synchronized void processDeadServer(final ServerName serverName, boolean shouldSplitWal) {<a name="line.649"></a>
-<span class="sourceLineNo">650</span> // When assignment manager is cleaning up the zookeeper nodes and rebuilding the<a name="line.650"></a>
-<span class="sourceLineNo">651</span> // in-memory region states, region servers could be down. Meta table can and<a name="line.651"></a>
-<span class="sourceLineNo">652</span> // should be re-assigned, log splitting can be done too. However, it is better to<a name="line.652"></a>
-<span class="sourceLineNo">653</span> // wait till the cleanup is done before re-assigning user regions.<a name="line.653"></a>
-<span class="sourceLineNo">654</span> //<a name="line.654"></a>
-<span class="sourceLineNo">655</span> // We should not wait in the server shutdown handler thread since it can clog<a name="line.655"></a>
-<span class="sourceLineNo">656</span> // the handler threads and meta table could not be re-assigned in case<a name="line.656"></a>
-<span class="sourceLineNo">657</span> // the corresponding server is down. So we queue them up here instead.<a name="line.657"></a>
-<span class="sourceLineNo">658</span> if (!services.getAssignmentManager().isFailoverCleanupDone()) {<a name="line.658"></a>
-<span class="sourceLineNo">659</span> requeuedDeadServers.put(serverName, shouldSplitWal);<a name="line.659"></a>
-<span class="sourceLineNo">660</span> return;<a name="line.660"></a>
-<span class="sourceLineNo">661</span> }<a name="line.661"></a>
-<span class="sourceLineNo">662</span><a name="line.662"></a>
-<span class="sourceLineNo">663</span> this.deadservers.add(serverName);<a name="line.663"></a>
-<span class="sourceLineNo">664</span> this.services.getMasterProcedureExecutor().<a name="line.664"></a>
-<span class="sourceLineNo">665</span> submitProcedure(new ServerCrashProcedure(serverName, shouldSplitWal, false));<a name="line.665"></a>
-<span class="sourceLineNo">666</span> }<a name="line.666"></a>
-<span class="sourceLineNo">667</span><a name="line.667"></a>
-<span class="sourceLineNo">668</span> /**<a name="line.668"></a>
-<span class="sourceLineNo">669</span> * Process the servers which died during master's initialization. It will be<a name="line.669"></a>
-<span class="sourceLineNo">670</span> * called after HMaster#assignMeta and AssignmentManager#joinCluster.<a name="line.670"></a>
-<span class="sourceLineNo">671</span> * */<a name="line.671"></a>
-<span class="sourceLineNo">672</span> synchronized void processQueuedDeadServers() {<a name="line.672"></a>
-<span class="sourceLineNo">673</span> if (!services.isServerCrashProcessingEnabled()) {<a name="line.673"></a>
-<span class="sourceLineNo">674</span> LOG.info("Master hasn't enabled ServerShutdownHandler");<a name="line.674"></a>
-<span class="sourceLineNo">675</span> }<a name="line.675"></a>
-<span class="sourceLineNo">676</span> Iterator<ServerName> serverIterator = queuedDeadServers.iterator();<a name="line.676"></a>
-<span class="sourceLineNo">677</span> while (serverIterator.hasNext()) {<a name="line.677"></a>
-<span class="sourceLineNo">678</span> ServerName tmpServerName = serverIterator.next();<a name="line.678"></a>
-<span class="sourceLineNo">679</span> expireServer(tmpServerName);<a name="line.679"></a>
-<span class="sourceLineNo">680</span> serverIterator.remove();<a name="line.680"></a>
-<span class="sourceLineNo">681</span> requeuedDeadServers.remove(tmpServerName);<a name="line.681"></a>
-<span class="sourceLineNo">682</span> }<a name="line.682"></a>
-<span class="sourceLineNo">683</span><a name="line.683"></a>
-<span class="sourceLineNo">684</span> if (!services.getAssignmentManager().isFailoverCleanupDone()) {<a name="line.684"></a>
-<span class="sourceLineNo">685</span> LOG.info("AssignmentManager hasn't finished failover cleanup; waiting");<a name="line.685"></a>
-<span class="sourceLineNo">686</span> }<a name="line.686"></a>
-<span class="sourceLineNo">687</span><a name="line.687"></a>
-<span class="sourceLineNo">688</span> for (Map.Entry<ServerName, Boolean> entry : requeuedDeadServers.entrySet()) {<a name="line.688"></a>
-<span class="sourceLineNo">689</span> processDeadServer(entry.getKey(), entry.getValue());<a name="line.689"></a>
-<span class="sourceLineNo">690</span> }<a name="line.690"></a>
-<span class="sourceLineNo">691</span> requeuedDeadServers.clear();<a name="line.691"></a>
-<span class="sourceLineNo">692</span> }<a name="line.692"></a>
-<span class="sourceLineNo">693</span><a name="line.693"></a>
-<span class="sourceLineNo">694</span> /*<a name="line.694"></a>
-<span class="sourceLineNo">695</span> * Remove the server from the drain list.<a name="line.695"></a>
-<span class="sourceLineNo">696</span> */<a name="line.696"></a>
-<span class="sourceLineNo">697</span> public boolean removeServerFromDrainList(final ServerName sn) {<a name="line.697"></a>
-<span class="sourceLineNo">698</span> // Warn if the server (sn) is not online. ServerName is of the form:<a name="line.698"></a>
-<span class="sourceLineNo">699</span> // <hostname> , <port> , <startcode><a name="line.699"></a>
-<span class="sourceLineNo">700</span><a name="line.700"></a>
-<span class="sourceLineNo">701</span> if (!this.isServerOnline(sn)) {<a name="line.701"></a>
-<span class="sourceLineNo">702</span> LOG.warn("Server " + sn + " is not currently online. " +<a name="line.702"></a>
-<span class="sourceLineNo">703</span> "Removing from draining list anyway, as requested.");<a name="line.703"></a>
-<span class="sourceLineNo">704</span> }<a name="line.704"></a>
-<span class="sourceLineNo">705</span> // Remove the server from the draining servers lists.<a name="line.705"></a>
-<span class="sourceLineNo">706</span> return this.drainingServers.remove(sn);<a name="line.706"></a>
-<span class="sourceLineNo">707</span> }<a name="line.707"></a>
-<span class="sourceLineNo">708</span><a name="line.708"></a>
-<span class="sourceLineNo">709</span> /*<a name="line.709"></a>
-<span class="sourceLineNo">710</span> * Add the server to the drain list.<a name="line.710"></a>
-<span class="sourceLineNo">711</span> */<a name="line.711"></a>
-<span class="sourceLineNo">712</span> public boolean addServerToDrainList(final ServerName sn) {<a name="line.712"></a>
-<span class="sourceLineNo">713</span> // Warn if the server (sn) is not online. ServerName is of the form:<a name="line.713"></a>
-<span class="sourceLineNo">714</span> // <hostname> , <port> , <startcode><a name="line.714"></a>
-<span class="sourceLineNo">715</span><a name="line.715"></a>
-<span class="sourceLineNo">716</span> if (!this.isServerOnline(sn)) {<a name="line.716"></a>
-<span class="sourceLineNo">717</span> LOG.warn("Server " + sn + " is not currently online. " +<a name="line.717"></a>
-<span class="sourceLineNo">718</span> "Ignoring request to add it to draining list.");<a name="line.718"></a>
-<span class="sourceLineNo">719</span> return false;<a name="line.719"></a>
-<span class="sourceLineNo">720</span> }<a name="line.720"></a>
-<span class="sourceLineNo">721</span> // Add the server to the draining servers lists, if it's not already in<a name="line.721"></a>
-<span class="sourceLineNo">722</span> // it.<a name="line.722"></a>
-<span class="sourceLineNo">723</span> if (this.drainingServers.contains(sn)) {<a name="line.723"></a>
-<span class="sourceLineNo">724</span> LOG.warn("Server " + sn + " is already in the draining server list." +<a name="line.724"></a>
-<span class="sourceLineNo">725</span> "Ignoring request to add it again.");<a name="line.725"></a>
-<span class="sourceLineNo">726</span> return false;<a name="line.726"></a>
-<span class="sourceLineNo">727</span> }<a name="line.727"></a>
-<span class="sourceLineNo">728</span> return this.drainingServers.add(sn);<a name="line.728"></a>
-<span class="sourceLineNo">729</span> }<a name="line.729"></a>
-<span class="sourceLineNo">730</span><a name="line.730"></a>
-<span class="sourceLineNo">731</span> // RPC methods to region servers<a name="line.731"></a>
-<span class="sourceLineNo">732</span><a name="line.732"></a>
-<span class="sourceLineNo">733</span> /**<a name="line.733"></a>
-<span class="sourceLineNo">734</span> * Sends an OPEN RPC to the specified server to open the specified region.<a name="line.734"></a>
-<span class="sourceLineNo">735</span> * <p><a name="line.735"></a>
-<span class="sourceLineNo">736</span> * Open should not fail but can if server just crashed.<a name="line.736"></a>
-<span class="sourceLineNo">737</span> * <p><a name="line.737"></a>
-<span class="sourceLineNo">738</span> * @param server server to open a region<a name="line.738"></a>
-<span class="sourceLineNo">739</span> * @param region region to open<a name="line.739"></a>
-<span class="sourceLineNo">740</span> * @param favoredNodes<a name="line.740"></a>
-<span class="sourceLineNo">741</span> */<a name="line.741"></a>
-<span class="sourceLineNo">742</span> public RegionOpeningState sendRegionOpen(final ServerName server,<a name="line.742"></a>
-<span class="sourceLineNo">743</span> HRegionInfo region, List<ServerName> favoredNodes)<a name="line.743"></a>
-<span class="sourceLineNo">744</span> throws IOException {<a name="line.744"></a>
-<span class="sourceLineNo">745</span> AdminService.BlockingInterface admin = getRsAdmin(server);<a name="line.745"></a>
-<span class="sourceLineNo">746</span> if (admin == null) {<a name="line.746"></a>
-<span class="sourceLineNo">747</span> throw new IOException("Attempting to send OPEN RPC to server " + server.toString() +<a name="line.747"></a>
-<span class="sourceLineNo">748</span> " failed because no RPC connection found to this server");<a name="line.748"></a>
-<span class="sourceLineNo">749</span> }<a name="line.749"></a>
-<span class="sourceLineNo">750</span> OpenRegionRequest request = RequestConverter.buildOpenRegionRequest(server,<a name="line.750"></a>
-<span class="sourceLineNo">751</span> region, favoredNodes,<a name="line.751"></a>
-<span class="sourceLineNo">752</span> (RecoveryMode.LOG_REPLAY == this.services.getMasterFileSystem().getLogRecoveryMode()));<a name="line.752"></a>
-<span class="sourceLineNo">753</span> try {<a name="line.753"></a>
-<span class="sourceLineNo">754</span> OpenRegionResponse response = admin.openRegion(null, request);<a name="line.754"></a>
-<span class="sourceLineNo">755</span> return ResponseConverter.getRegionOpeningState(response);<a name="line.755"></a>
-<span class="sourceLineNo">756</span> } catch (ServiceException se) {<a name="line.756"></a>
-<span class="sourceLineNo">757</span> throw ProtobufUtil.getRemoteException(se);<a name="line.757"></a>
-<span class="sourceLineNo">758</span> }<a name="line.758"></a>
-<span class="sourceLineNo">759</span> }<a name="line.759"></a>
-<span class="sourceLineNo">760</span><a name="line.760"></a>
-<span class="sourceLineNo">761</span> /**<a name="line.761"></a>
-<span class="sourceLineNo">762</span> * Sends an OPEN RPC to the specified server to open the specified region.<a name="line.762"></a>
-<span class="sourceLineNo">763</span> * <p><a name="line.763"></a>
-<span class="sourceLineNo">764</span> * Open should not fail but can if server just crashed.<a name="line.764"></a>
-<span class="sourceLineNo">765</span> * <p><a name="line.765"></a>
-<span class="sourceLineNo">766</span> * @param server server to open a region<a name="line.766"></a>
-<span class="sourceLineNo">767</span> * @param regionOpenInfos info of a list of regions to open<a name="line.767"></a>
-<span class="sourceLineNo">768</span> * @return a list of region opening states<a name="line.768"></a>
-<span class="sourceLineNo">769</span> */<a name="line.769"></a>
-<span class="sourceLineNo">770</span> public List<RegionOpeningState> sendRegionOpen(ServerName server,<a name="line.770"></a>
-<span class="sourceLineNo">771</span> List<Pair<HRegionInfo, List<ServerName>>> regionOpenInfos)<a name="line.771"></a>
-<span class="sourceLineNo">772</span> throws IOException {<a name="line.772"></a>
-<span class="sourceLineNo">773</span> AdminService.BlockingInterface admin = getRsAdmin(server);<a name="line.773"></a>
-<span class="sourceLineNo">774</span> if (admin == null) {<a name="line.774"></a>
-<span class="sourceLineNo">775</span> throw new IOException("Attempting to send OPEN RPC to server " + server.toString() +<a name="line.775"></a>
-<span class="sourceLineNo">776</span> " failed because no RPC connection found to this server");<a name="line.776"></a>
-<span class="sourceLineNo">777</span> }<a name="line.777"></a>
-<span class="sourceLineNo">778</span><a name="line.778"></a>
-<span class="sourceLineNo">779</span> OpenRegionRequest request = RequestConverter.buildOpenRegionRequest(server, regionOpenInfos,<a name="line.779"></a>
-<span class="sourceLineNo">780</span> (RecoveryMode.LOG_REPLAY == this.services.getMasterFileSystem().getLogRecoveryMode()));<a name="line.780"></a>
-<span class="sourceLineNo">781</span> try {<a name="line.781"></a>
-<span class="sourceLineNo">782</span> OpenRegionResponse response = admin.openRegion(null, request);<a name="line.782"></a>
-<span class="sourceLineNo">783</span> return ResponseConverter.getRegionOpeningStateList(response);<a name="line.783"></a>
-<span class="sourceLineNo">784</span> } catch (ServiceException se) {<a name="line.784"></a>
-<span class="sourceLineNo">785</span> throw ProtobufUtil.getRemoteException(se);<a name="line.785"></a>
-<span class="sourceLineNo">786</span> }<a name="line.786"></a>
-<span class="sourceLineNo">787</span> }<a name="line.787"></a>
-<span class="sourceLineNo">788</span><a name="line.788"></a>
-<span class="sourceLineNo">789</span> /**<a name="line.789"></a>
-<span class="sourceLineNo">790</span> * Sends an CLOSE RPC to the specified server to close the specified region.<a name="line.790"></a>
-<span class="sourceLineNo">791</span> * <p><a name="line.791"></a>
-<span class="sourceLineNo">792</span> * A region server could reject the close request because it either does not<a name="line.792"></a>
-<span class="sourceLineNo">793</span> * have the specified region or the region is being split.<a name="line.793"></a>
-<span class="sourceLineNo">794</span> * @param server server to open a region<a name="line.794"></a>
-<span class="sourceLineNo">795</span> * @param region region to open<a name="line.795"></a>
-<span class="sourceLineNo">796</span> * @param dest - if the region is moved to another server, the destination server. null otherwise.<a name="line.796"></a>
-<span class="sourceLineNo">797</span> * @throws IOException<a name="line.797"></a>
-<span class="sourceLineNo">798</span> */<a name="line.798"></a>
-<span class="sourceLineNo">799</span> public boolean sendRegionClose(ServerName server, HRegionInfo region,<a name="line.799"></a>
-<span class="sourceLineNo">800</span> ServerName dest) throws IOException {<a name="line.800"></a>
-<span class="sourceLineNo">801</span> if (server == null) throw new NullPointerException("Passed server is null");<a name="line.801"></a>
-<span class="sourceLineNo">802</span> AdminService.BlockingInterface admin = getRsAdmin(server);<a name="line.802"></a>
-<span class="sourceLineNo">803</span> if (admin == null) {<a name="line.803"></a>
-<span class="sourceLineNo">804</span> throw new IOException("Attempting to send CLOSE RPC to server " +<a name="line.804"></a>
-<span class="sourceLineNo">805</span> server.toString() + " for region " +<a name="line.805"></a>
-<span class="sourceLineNo">806</span> region.getRegionNameAsString() +<a name="line.806"></a>
-<span class="sourceLineNo">807</span> " failed because no RPC connection found to this server");<a name="line.807"></a>
-<span class="sourceLineNo">808</span> }<a name="line.808"></a>
-<span class="sourceLineNo">809</span> return ProtobufUtil.closeRegion(admin, server, region.getRegionName(),<a name="line.809"></a>
-<span class="sourceLineNo">810</span> dest);<a name="line.810"></a>
-<span class="sourceLineNo">811</span> }<a name="line.811"></a>
-<span class="sourceLineNo">812</span><a name="line.812"></a>
-<span class="sourceLineNo">813</span> public boolean sendRegionClose(ServerName server,<a name="line.813"></a>
-<span class="sourceLineNo">814</span> HRegionInfo region) throws IOException {<a name="line.814"></a>
-<span class="sourceLineNo">815</span> return sendRegionClose(server, region, null);<a name="line.815"></a>
-<span class="sourceLineNo">816</span> }<a name="line.816"></a>
-<span class="sourceLineNo">817</span><a name="line.817"></a>
-<span class="sourceLineNo">818</span> /**<a name="line.818"></a>
-<span class="sourceLineNo">819</span> * Sends a WARMUP RPC to the specified server to warmup the specified region.<a name="line.819"></a>
-<span class="sourceLineNo">820</span> * <p><a name="line.820"></a>
-<span class="sourceLineNo">821</span> * A region server could reject the close request because it either does not<a name="line.821"></a>
-<span class="sourceLineNo">822</span> * have the specified region or the region is being split.<a name="line.822"></a>
-<span class="sourceLineNo">823</span> * @param server server to warmup a region<a name="line.823"></a>
-<span class="sourceLineNo">824</span> * @param region region to warmup<a name="line.824"></a>
-<span class="sourceLineNo">825</span> */<a name="line.825"></a>
-<span class="sourceLineNo">826</span> public void sendRegionWarmup(ServerName server,<a name="line.826"></a>
-<span class="sourceLineNo">827</span> HRegionInfo region) {<a name="line.827"></a>
-<span class="sourceLineNo">828</span> if (server == null) return;<a name="line.828"></a>
-<span class="sourceLineNo">829</span> try {<a name="line.829"></a>
-<span class="sourceLineNo">830</span> AdminService.BlockingInterface admin = getRsAdmin(server);<a name="line.830"></a>
-<span class="sourceLineNo">831</span> ProtobufUtil.warmupRegion(admin, region);<a name="line.831"></a>
-<span class="sourceLineNo">832</span> } catch (IOException e) {<a name="line.832"></a>
-<span class="sourceLineNo">833</span> LOG.error("Received exception in RPC for warmup server:" +<a name="line.833"></a>
-<span class="sourceLineNo">834</span> server + "region: " + region +<a name="line.834"></a>
-<span class="sourceLineNo">835</span> "exception: " + e);<a name="line.835"></a>
-<span class="sourceLineNo">836</span> }<a name="line.836"></a>
-<span class="sourceLineNo">837</span> }<a name="line.837"></a>
-<span class="sourceLineNo">838</span><a name="line.838"></a>
-<span class="sourceLineNo">839</span> /**<a name="line.839"></a>
-<span class="sourceLineNo">840</span> * Contacts a region server and waits up to timeout ms<a name="line.840"></a>
-<span class="sourceLineNo">841</span> * to close the region. This bypasses the active hmaster.<a name="line.841"></a>
-<span class="sourceLineNo">842</span> */<a name="line.842"></a>
-<span class="sourceLineNo">843</span> public static void closeRegionSilentlyAndWait(ClusterConnection connection, <a name="line.843"></a>
-<span class="sourceLineNo">844</span> ServerName server, HRegionInfo region, long timeout) throws IOException, InterruptedException {<a name="line.844"></a>
-<span class="sourceLineNo">845</span> AdminService.BlockingInterface rs = connection.getAdmin(server);<a name="line.845"></a>
-<span class="sourceLineNo">846</span> try {<a name="line.846"></a>
-<span class="sourceLineNo">847</span> ProtobufUtil.closeRegion(rs, server, region.getRegionName());<a name="line.847"></a>
-<span class="sourceLineNo">848</span> } catch (IOException e) {<a name="line.848"></a>
-<span class="sourceLineNo">849</span> LOG.warn("Exception when closing region: " + region.getRegionNameAsString(), e);<a name="line.849"></a>
-<span class="sourceLineNo">850</span> }<a name="line.850"></a>
-<span class="sourceLineNo">851</span> long expiration = timeout + System.currentTimeMillis();<a name="line.851"></a>
-<span class="sourceLineNo">852</span> while (System.currentTimeMillis() < expiration) {<a name="line.852"></a>
-<span class="sourceLineNo">853</span> try {<a name="line.853"></a>
-<span class="sourceLineNo">854</span> HRegionInfo rsRegion =<a name="line.854"></a>
-<span class="sourceLineNo">855</span> ProtobufUtil.getRegionInfo(rs, region.getRegionName());<a name="line.855"></a>
-<span class="sourceLineNo">856</span> if (rsRegion == null) return;<a name="line.856"></a>
-<span class="sourceLineNo">857</span> } catch (IOException ioe) {<a name="line.857"></a>
-<span class="sourceLineNo">858</span> if (ioe instanceof NotServingRegionException) // no need to retry again<a name="line.858"></a>
-<span class="sourceLineNo">859</span> return;<a name="line.859"></a>
-<span class="sourceLineNo">860</span> LOG.warn("Exception when retrieving regioninfo from: " + region.getRegionNameAsString(), ioe);<a name="line.860"></a>
-<span class="sourceLineNo">861</span> }<a name="line.861"></a>
-<span class="sourceLineNo">862</span> Thread.sleep(1000);<a name="line.862"></a>
-<span class="sourceLineNo">863</span> }<a name="line.863"></a>
-<span class="sourceLineNo">864</span> throw new IOException("Region " + region + " failed to close within"<a name="line.864"></a>
-<span class="sourceLineNo">865</span> + " timeout " + timeout);<a name="line.865"></a>
-<span class="sourceLineNo">866</span> }<a name="line.866"></a>
-<span class="sourceLineNo">867</span><a name="line.867"></a>
-<span class="sourceLineNo">868</span> /**<a name="line.868"></a>
-<span class="sourceLineNo">869</span> * Sends an MERGE REGIONS RPC to the specified server to merge the specified<a name="line.869"></a>
-<span class="sourceLineNo">870</span> * regions.<a name="line.870"></a>
-<span class="sourceLineNo">871</span> * <p><a name="line.871"></a>
-<span class="sourceLineNo">872</span> * A region server could reject the close request because it either does not<a name="line.872"></a>
-<span class="sourceLineNo">873</span> * have the specified region.<a name="line.873"></a>
-<span class="sourceLineNo">874</span> * @param server server to merge regions<a name="line.874"></a>
-<span class="sourceLineNo">875</span> * @param region_a region to merge<a name="line.875"></a>
-<span class="sourceLineNo">876</span> * @param region_b region to merge<a name="line.876"></a>
-<span class="sourceLineNo">877</span> * @param forcible true if do a compulsory merge, otherwise we will only merge<a name="line.877"></a>
-<span class="sourceLineNo">878</span> * two adjacent regions<a name="line.878"></a>
-<span class="sourceLineNo">879</span> * @throws IOException<a name="line.879"></a>
-<span class="sourceLineNo">880</span> */<a name="line.880"></a>
-<span class="sourceLineNo">881</span> public void sendRegionsMerge(ServerName server, HRegionInfo region_a,<a name="line.881"></a>
-<span class="sourceLineNo">882</span> HRegionInfo region_b, boolean forcible) throws IOException {<a name="line.882"></a>
-<span class="sourceLineNo">883</span> if (server == null)<a name="line.883"></a>
-<span class="sourceLineNo">884</span> throw new NullPointerException("Passed server is null");<a name="line.884"></a>
-<span class="sourceLineNo">885</span> if (region_a == null || region_b == null)<a name="line.885"></a>
-<span class="sourceLineNo">886</span> throw new NullPointerException("Passed region is null");<a name="line.886"></a>
-<span class="sourceLineNo">887</span> AdminService.BlockingInterface admin = getRsAdmin(server);<a name="line.887"></a>
-<span class="sourceLineNo">888</span> if (admin == null) {<a name="line.888"></a>
-<span class="sourceLineNo">889</span> throw new IOException("Attempting to send MERGE REGIONS RPC to server "<a name="line.889"></a>
-<span class="sourceLineNo">890</span> + server.toString() + " for region "<a name="line.890"></a>
-<span class="sourceLineNo">891</span> + region_a.getRegionNameAsString() + ","<a name="line.891"></a>
-<span class="sourceLineNo">892</span> + region_b.getRegionNameAsString()<a name="line.892"></a>
-<span class="sourceLineNo">893</span> + " failed because no RPC connection found to this server");<a name="line.893"></a>
-<span class="sourceLineNo">894</span> }<a name="line.894"></a>
-<span class="sourceLineNo">895</span> ProtobufUtil.mergeRegions(admin, region_a, region_b, forcible);<a name="line.895"></a>
-<span class="sourceLineNo">896</span> }<a name="line.896"></a>
-<span class="sourceLineNo">897</span><a name="line.897"></a>
-<span class="sourceLineNo">898</span> /**<a name="line.898"></a>
-<span class="sourceLineNo">899</span> * Check if a region server is reachable and has the expected start code<a name="line.899"></a>
-<span class="sourceLineNo">900</span> */<a name="line.900"></a>
-<span class="sourceLineNo">901</span> public boolean isServerReachable(ServerName server) {<a name="line.901"></a>
-<span class="sourceLineNo">902</span> if (server == null) throw new NullPointerException("Passed server is null");<a name="line.902"></a>
-<span class="sourceLineNo">903</span><a name="line.903"></a>
-<span class="sourceLineNo">904</span> RetryCounter retryCounter = pingRetryCounterFactory.create();<a name="line.904"></a>
-<span class="sourceLineNo">905</span> while (retryCounter.shouldRetry()) {<a name="line.905"></a>
-<span class="sourceLineNo">906</span> try {<a name="line.906"></a>
-<span class="sourceLineNo">907</span> AdminService.BlockingInterface admin = getRsAdmin(server);<a name="line.907"></a>
-<span class="sourceLineNo">908</span> if (admin != null) {<a name="line.908"></a>
-<span class="sourceLineNo">909</span> ServerInfo info = ProtobufUtil.getServerInfo(admin);<a name="line.909"></a>
-<span class="sourceLineNo">910</span> return info != null && info.hasServerName()<a name="line.910"></a>
-<span class="sourceLineNo">911</span> && server.getStartcode() == info.getServerName().getStartCode();<a name="line.911"></a>
-<span class="sourceLineNo">912</span> }<a name="line.912"></a>
-<span class="sourceLineNo">913</span> } catch (IOException ioe) {<a name="line.913"></a>
-<span class="sourceLineNo">914</span> LOG.debug("Couldn't reach " + server + ", try=" + retryCounter.getAttemptTimes()<a name="line.914"></a>
-<span class="sourceLineNo">915</span> + " of " + retryCounter.getMaxAttempts(), ioe);<a name="line.915"></a>
-<span class="sourceLineNo">916</span> try {<a name="line.916"></a>
-<span class="sourceLineNo">917</span> retryCounter.sleepUntilNextRetry();<a name="line.917"></a>
-<span class="sourceLineNo">918</span> } catch(InterruptedException ie) {<a name="line.918"></a>
-<span class="sourceLineNo">919</span> Thread.currentThread().interrupt();<a name="line.919"></a>
-<span class="sourceLineNo">920</span> }<a name="line.920"></a>
-<span class="sourceLineNo">921</span> }<a name="line.921"></a>
-<span class="sourceLineNo">922</span> }<a name="line.922"></a>
-<span class="sourceLineNo">923</span> return false;<a name="line.923"></a>
-<span class="sourceLineNo">924</span> }<a name="line.924"></a>
-<span class="sourceLineNo">925</span><a name="line.925"></a>
-<span class="sourceLineNo">926</span> /**<a name="line.926"></a>
-<span class="sourceLineNo">927</span> * @param sn<a name="line.927"></a>
-<span class="sourceLineNo">928</span> * @return Admin interface for the remote regionserver named <code>sn</code><a name="line.928"></a>
-<span class="sourceLineNo">929</span> * @throws IOException<a name="line.929"></a>
-<span class="sourceLineNo">930</span> * @throws RetriesExhaustedException wrapping a ConnectException if failed<a name="line.930"></a>
-<span class="sourceLineNo">931</span> */<a name="line.931"></a>
-<span class="sourceLineNo">932</span> private AdminService.BlockingInterface getRsAdmin(final ServerName sn)<a name="line.932"></a>
-<span class="sourceLineNo">933</span> throws IOException {<a name="line.933"></a>
-<span class="sourceLineNo">934</span> AdminService.BlockingInterface admin = this.rsAdmins.get(sn);<a name="line.934"></a>
-<span class="sourceLineNo">935</span> if (admin == null) {<a name="line.935"></a>
-<span class="sourceLineNo">936</span> LOG.debug("New admin connection to " + sn.toString());<a name="line.936"></a>
-<span class="sourceLineNo">937</span> if (sn.equals(master.getServerName()) && master instanceof HRegionServer) {<a name="line.937"></a>
-<span class="sourceLineNo">938</span> // A master is also a region server now, see HBASE-10569 for details<a name="line.938"></a>
-<span class="sourceLineNo">939</span> admin = ((HRegionServer)master).getRSRpcServices();<a name="line.939"></a>
-<span class="sourceLineNo">940</span> } else {<a name="line.940"></a>
-<span class="sourceLineNo">941</span> admin = this.connection.getAdmin(sn);<a name="line.941"></a>
-<span class="sourceLineNo">942</span> }<a name="line.942"></a>
-<span class="sourceLineNo">943</span> this.rsAdmins.put(sn, admin);<a name="line.943"></a>
-<span class="sourceLineNo">944</span> }<a name="line.944"></a>
-<span class="sourceLineNo">945</span> return admin;<a name="line.945"></a>
-<span class="sourceLineNo">946</span> }<a name="line.946"></a>
-<span class="sourceLineNo">947</span><a name="line.947"></a>
-<span class="sourceLineNo">948</span> /**<a name="line.948"></a>
-<span class="sourceLineNo">949</span> * Wait for the region servers to report in.<a name="line.949"></a>
-<span class="sourceLineNo">950</span> * We will wait until one of this condition is met:<a name="line.950"></a>
-<span class="sourceLineNo">951</span> * - the master is stopped<a name="line.951"></a>
-<span class="sourceLineNo">952</span> * - the 'hbase.master.wait.on.regionservers.maxtostart' number of<a name="line.952"></a>
-<span class="sourceLineNo">953</span> * region servers is reached<a name="line.953"></a>
-<span class="sourceLineNo">954</span> * - the 'hbase.master.wait.on.regionservers.mintostart' is reached AND<a name="line.954"></a>
-<span class="sourceLineNo">955</span> * there have been no new region server in for<a name="line.955"></a>
-<span class="sourceLineNo">956</span> * 'hbase.master.wait.on.regionservers.interval' time AND<a name="line.956"></a>
-<span class="sourceLineNo">957</span> * the 'hbase.master.wait.on.regionservers.timeout' is reached<a name="line.957"></a>
-<span class="sourceLineNo">958</span> *<a name="line.958"></a>
-<span class="sourceLineNo">959</span> * @throws InterruptedException<a name="line.959"></a>
-<span class="sourceLineNo">960</span> */<a name="line.960"></a>
-<span class="sourceLineNo">961</span> publi
<TRUNCATED>