http://git-wip-us.apache.org/repos/asf/hbase-site/blob/3469cbc0/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html index 8b5905e..98e88a4 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html @@ -35,465 +35,461 @@ <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.master.assignment.RegionStates.RegionStateNode;<a name="line.27"></a> <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;<a name="line.28"></a> <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.master.procedure.TableProcedureInterface;<a name="line.29"></a> -<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.procedure2.Procedure;<a name="line.30"></a> -<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;<a name="line.31"></a> -<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException;<a name="line.32"></a> -<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.procedure2.RemoteProcedureDispatcher.RemoteOperation;<a name="line.33"></a> -<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.procedure2.RemoteProcedureDispatcher.RemoteProcedure;<a name="line.34"></a> -<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.procedure2.RemoteProcedureException;<a name="line.35"></a> -<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos;<a name="line.36"></a> -<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RegionTransitionState;<a name="line.37"></a> -<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;<a name="line.38"></a> -<span class="sourceLineNo">039</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.39"></a> -<span class="sourceLineNo">040</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.40"></a> -<span class="sourceLineNo">041</span>import org.slf4j.Logger;<a name="line.41"></a> -<span class="sourceLineNo">042</span>import org.slf4j.LoggerFactory;<a name="line.42"></a> -<span class="sourceLineNo">043</span><a name="line.43"></a> -<span class="sourceLineNo">044</span>/**<a name="line.44"></a> -<span class="sourceLineNo">045</span> * Base class for the Assign and Unassign Procedure.<a name="line.45"></a> -<span class="sourceLineNo">046</span> *<a name="line.46"></a> -<span class="sourceLineNo">047</span> * Locking:<a name="line.47"></a> -<span class="sourceLineNo">048</span> * Takes exclusive lock on the region being assigned/unassigned. Thus, there can only be one<a name="line.48"></a> -<span class="sourceLineNo">049</span> * RegionTransitionProcedure per region running at a time (see MasterProcedureScheduler).<a name="line.49"></a> -<span class="sourceLineNo">050</span> *<a name="line.50"></a> -<span class="sourceLineNo">051</span> * <p>This procedure is asynchronous and responds to external events.<a name="line.51"></a> -<span class="sourceLineNo">052</span> * The AssignmentManager will notify this procedure when the RS completes<a name="line.52"></a> -<span class="sourceLineNo">053</span> * the operation and reports the transitioned state<a name="line.53"></a> -<span class="sourceLineNo">054</span> * (see the Assign and Unassign class for more detail).</p><a name="line.54"></a> -<span class="sourceLineNo">055</span> *<a name="line.55"></a> -<span class="sourceLineNo">056</span> * <p>Procedures move from the REGION_TRANSITION_QUEUE state when they are<a name="line.56"></a> -<span class="sourceLineNo">057</span> * first submitted, to the REGION_TRANSITION_DISPATCH state when the request<a name="line.57"></a> -<span class="sourceLineNo">058</span> * to remote server is sent and the Procedure is suspended waiting on external<a name="line.58"></a> -<span class="sourceLineNo">059</span> * event to be woken again. Once the external event is triggered, Procedure<a name="line.59"></a> -<span class="sourceLineNo">060</span> * moves to the REGION_TRANSITION_FINISH state.</p><a name="line.60"></a> -<span class="sourceLineNo">061</span> *<a name="line.61"></a> -<span class="sourceLineNo">062</span> * <p>NOTE: {@link AssignProcedure} and {@link UnassignProcedure} should not be thought of<a name="line.62"></a> -<span class="sourceLineNo">063</span> * as being asymmetric, at least currently.<a name="line.63"></a> -<span class="sourceLineNo">064</span> * <ul><a name="line.64"></a> -<span class="sourceLineNo">065</span> * <li>{@link AssignProcedure} moves through all the above described states and implements methods<a name="line.65"></a> -<span class="sourceLineNo">066</span> * associated with each while {@link UnassignProcedure} starts at state<a name="line.66"></a> -<span class="sourceLineNo">067</span> * REGION_TRANSITION_DISPATCH and state REGION_TRANSITION_QUEUE is not supported.</li><a name="line.67"></a> -<span class="sourceLineNo">068</span> *<a name="line.68"></a> -<span class="sourceLineNo">069</span> * <li>When any step in {@link AssignProcedure} fails, failure handler<a name="line.69"></a> -<span class="sourceLineNo">070</span> * AssignProcedure#handleFailure(MasterProcedureEnv, RegionStateNode) re-attempts the<a name="line.70"></a> -<span class="sourceLineNo">071</span> * assignment by setting the procedure state to REGION_TRANSITION_QUEUE and forces<a name="line.71"></a> -<span class="sourceLineNo">072</span> * assignment to a different target server by setting {@link AssignProcedure#forceNewPlan}. When<a name="line.72"></a> -<span class="sourceLineNo">073</span> * the number of attempts reaches threshold configuration 'hbase.assignment.maximum.attempts',<a name="line.73"></a> -<span class="sourceLineNo">074</span> * the procedure is aborted. For {@link UnassignProcedure}, similar re-attempts are<a name="line.74"></a> -<span class="sourceLineNo">075</span> * intentionally not implemented. It is a 'one shot' procedure. See its class doc for how it<a name="line.75"></a> -<span class="sourceLineNo">076</span> * handles failure.<a name="line.76"></a> -<span class="sourceLineNo">077</span> * </li><a name="line.77"></a> -<span class="sourceLineNo">078</span> * <li>If we find a region in an 'unexpected' state, we'll complain and retry with backoff forever.<a name="line.78"></a> -<span class="sourceLineNo">079</span> * The 'unexpected' state needs to be fixed either by another running Procedure or by operator<a name="line.79"></a> -<span class="sourceLineNo">080</span> * intervention (Regions in 'unexpected' state indicates bug or unexpected transition type).<a name="line.80"></a> -<span class="sourceLineNo">081</span> * For this to work, subclasses need to persist the 'attempt' counter kept in this class when<a name="line.81"></a> -<span class="sourceLineNo">082</span> * they do serializeStateData and restore it inside their deserializeStateData, just as they do<a name="line.82"></a> -<span class="sourceLineNo">083</span> * for {@link #regionInfo}.<a name="line.83"></a> -<span class="sourceLineNo">084</span> * </li><a name="line.84"></a> -<span class="sourceLineNo">085</span> * </ul><a name="line.85"></a> -<span class="sourceLineNo">086</span> * </p><a name="line.86"></a> -<span class="sourceLineNo">087</span> *<a name="line.87"></a> -<span class="sourceLineNo">088</span> * <p>TODO: Considering it is a priority doing all we can to get make a region available as soon as<a name="line.88"></a> -<span class="sourceLineNo">089</span> * possible, re-attempting with any target makes sense if specified target fails in case of<a name="line.89"></a> -<span class="sourceLineNo">090</span> * {@link AssignProcedure}. For {@link UnassignProcedure}, our concern is preventing data loss<a name="line.90"></a> -<span class="sourceLineNo">091</span> * on failed unassign. See class doc for explanation.<a name="line.91"></a> -<span class="sourceLineNo">092</span> */<a name="line.92"></a> -<span class="sourceLineNo">093</span>@InterfaceAudience.Private<a name="line.93"></a> -<span class="sourceLineNo">094</span>public abstract class RegionTransitionProcedure<a name="line.94"></a> -<span class="sourceLineNo">095</span> extends Procedure<MasterProcedureEnv><a name="line.95"></a> -<span class="sourceLineNo">096</span> implements TableProcedureInterface,<a name="line.96"></a> -<span class="sourceLineNo">097</span> RemoteProcedure<MasterProcedureEnv, ServerName> {<a name="line.97"></a> -<span class="sourceLineNo">098</span> private static final Logger LOG = LoggerFactory.getLogger(RegionTransitionProcedure.class);<a name="line.98"></a> -<span class="sourceLineNo">099</span><a name="line.99"></a> -<span class="sourceLineNo">100</span> protected final AtomicBoolean aborted = new AtomicBoolean(false);<a name="line.100"></a> -<span class="sourceLineNo">101</span><a name="line.101"></a> -<span class="sourceLineNo">102</span> private RegionTransitionState transitionState = RegionTransitionState.REGION_TRANSITION_QUEUE;<a name="line.102"></a> -<span class="sourceLineNo">103</span> /**<a name="line.103"></a> -<span class="sourceLineNo">104</span> * This data member must be persisted. Expectation is that it is done by subclasses in their<a name="line.104"></a> -<span class="sourceLineNo">105</span> * {@link #serializeStateData(ProcedureStateSerializer)} call, restoring {@link #regionInfo}<a name="line.105"></a> -<span class="sourceLineNo">106</span> * in their {@link #deserializeStateData(ProcedureStateSerializer)} method.<a name="line.106"></a> -<span class="sourceLineNo">107</span> */<a name="line.107"></a> -<span class="sourceLineNo">108</span> private RegionInfo regionInfo;<a name="line.108"></a> -<span class="sourceLineNo">109</span><a name="line.109"></a> -<span class="sourceLineNo">110</span> /**<a name="line.110"></a> -<span class="sourceLineNo">111</span> * Like {@link #regionInfo}, the expectation is that subclasses persist the value of this<a name="line.111"></a> -<span class="sourceLineNo">112</span> * data member. It is used doing backoff when Procedure gets stuck.<a name="line.112"></a> -<span class="sourceLineNo">113</span> */<a name="line.113"></a> -<span class="sourceLineNo">114</span> private int attempt;<a name="line.114"></a> -<span class="sourceLineNo">115</span><a name="line.115"></a> -<span class="sourceLineNo">116</span> private volatile boolean lock = false;<a name="line.116"></a> -<span class="sourceLineNo">117</span><a name="line.117"></a> -<span class="sourceLineNo">118</span> // Required by the Procedure framework to create the procedure on replay<a name="line.118"></a> -<span class="sourceLineNo">119</span> public RegionTransitionProcedure() {}<a name="line.119"></a> -<span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> public RegionTransitionProcedure(final RegionInfo regionInfo) {<a name="line.121"></a> -<span class="sourceLineNo">122</span> this.regionInfo = regionInfo;<a name="line.122"></a> -<span class="sourceLineNo">123</span> }<a name="line.123"></a> -<span class="sourceLineNo">124</span><a name="line.124"></a> -<span class="sourceLineNo">125</span> @VisibleForTesting<a name="line.125"></a> -<span class="sourceLineNo">126</span> public RegionInfo getRegionInfo() {<a name="line.126"></a> -<span class="sourceLineNo">127</span> return regionInfo;<a name="line.127"></a> -<span class="sourceLineNo">128</span> }<a name="line.128"></a> -<span class="sourceLineNo">129</span><a name="line.129"></a> -<span class="sourceLineNo">130</span> /**<a name="line.130"></a> -<span class="sourceLineNo">131</span> * This setter is for subclasses to call in their<a name="line.131"></a> -<span class="sourceLineNo">132</span> * {@link #deserializeStateData(ProcedureStateSerializer)} method. Expectation is that<a name="line.132"></a> -<span class="sourceLineNo">133</span> * subclasses will persist `regioninfo` in their<a name="line.133"></a> -<span class="sourceLineNo">134</span> * {@link #serializeStateData(ProcedureStateSerializer)} method and then restore `regionInfo` on<a name="line.134"></a> -<span class="sourceLineNo">135</span> * deserialization by calling.<a name="line.135"></a> -<span class="sourceLineNo">136</span> */<a name="line.136"></a> -<span class="sourceLineNo">137</span> protected void setRegionInfo(final RegionInfo regionInfo) {<a name="line.137"></a> -<span class="sourceLineNo">138</span> this.regionInfo = regionInfo;<a name="line.138"></a> -<span class="sourceLineNo">139</span> }<a name="line.139"></a> -<span class="sourceLineNo">140</span><a name="line.140"></a> -<span class="sourceLineNo">141</span> /**<a name="line.141"></a> -<span class="sourceLineNo">142</span> * This setter is for subclasses to call in their<a name="line.142"></a> -<span class="sourceLineNo">143</span> * {@link #deserializeStateData(ProcedureStateSerializer)} method.<a name="line.143"></a> -<span class="sourceLineNo">144</span> * @see #setRegionInfo(RegionInfo)<a name="line.144"></a> -<span class="sourceLineNo">145</span> */<a name="line.145"></a> -<span class="sourceLineNo">146</span> protected void setAttempt(int attempt) {<a name="line.146"></a> -<span class="sourceLineNo">147</span> this.attempt = attempt;<a name="line.147"></a> -<span class="sourceLineNo">148</span> }<a name="line.148"></a> -<span class="sourceLineNo">149</span><a name="line.149"></a> -<span class="sourceLineNo">150</span> protected int getAttempt() {<a name="line.150"></a> -<span class="sourceLineNo">151</span> return this.attempt;<a name="line.151"></a> -<span class="sourceLineNo">152</span> }<a name="line.152"></a> -<span class="sourceLineNo">153</span><a name="line.153"></a> -<span class="sourceLineNo">154</span> @Override<a name="line.154"></a> -<span class="sourceLineNo">155</span> public TableName getTableName() {<a name="line.155"></a> -<span class="sourceLineNo">156</span> RegionInfo hri = getRegionInfo();<a name="line.156"></a> -<span class="sourceLineNo">157</span> return hri != null? hri.getTable(): null;<a name="line.157"></a> -<span class="sourceLineNo">158</span> }<a name="line.158"></a> -<span class="sourceLineNo">159</span><a name="line.159"></a> -<span class="sourceLineNo">160</span> public boolean isMeta() {<a name="line.160"></a> -<span class="sourceLineNo">161</span> return TableName.isMetaTableName(getTableName());<a name="line.161"></a> -<span class="sourceLineNo">162</span> }<a name="line.162"></a> -<span class="sourceLineNo">163</span><a name="line.163"></a> -<span class="sourceLineNo">164</span> @Override<a name="line.164"></a> -<span class="sourceLineNo">165</span> public void toStringClassDetails(final StringBuilder sb) {<a name="line.165"></a> -<span class="sourceLineNo">166</span> sb.append(getClass().getSimpleName());<a name="line.166"></a> -<span class="sourceLineNo">167</span> sb.append(" table=");<a name="line.167"></a> -<span class="sourceLineNo">168</span> sb.append(getTableName());<a name="line.168"></a> -<span class="sourceLineNo">169</span> sb.append(", region=");<a name="line.169"></a> -<span class="sourceLineNo">170</span> sb.append(getRegionInfo() == null? null: getRegionInfo().getEncodedName());<a name="line.170"></a> -<span class="sourceLineNo">171</span> }<a name="line.171"></a> -<span class="sourceLineNo">172</span><a name="line.172"></a> -<span class="sourceLineNo">173</span> public RegionStateNode getRegionState(final MasterProcedureEnv env) {<a name="line.173"></a> -<span class="sourceLineNo">174</span> return env.getAssignmentManager().getRegionStates().getOrCreateRegionStateNode(getRegionInfo());<a name="line.174"></a> -<span class="sourceLineNo">175</span> }<a name="line.175"></a> -<span class="sourceLineNo">176</span><a name="line.176"></a> -<span class="sourceLineNo">177</span> void setTransitionState(final RegionTransitionState state) {<a name="line.177"></a> -<span class="sourceLineNo">178</span> this.transitionState = state;<a name="line.178"></a> -<span class="sourceLineNo">179</span> }<a name="line.179"></a> -<span class="sourceLineNo">180</span><a name="line.180"></a> -<span class="sourceLineNo">181</span> RegionTransitionState getTransitionState() {<a name="line.181"></a> -<span class="sourceLineNo">182</span> return transitionState;<a name="line.182"></a> -<span class="sourceLineNo">183</span> }<a name="line.183"></a> -<span class="sourceLineNo">184</span><a name="line.184"></a> -<span class="sourceLineNo">185</span> protected abstract boolean startTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a name="line.185"></a> -<span class="sourceLineNo">186</span> throws IOException, ProcedureSuspendedException;<a name="line.186"></a> -<span class="sourceLineNo">187</span><a name="line.187"></a> -<span class="sourceLineNo">188</span> /**<a name="line.188"></a> -<span class="sourceLineNo">189</span> * Called when the Procedure is in the REGION_TRANSITION_DISPATCH state.<a name="line.189"></a> -<span class="sourceLineNo">190</span> * In here we do the RPC call to OPEN/CLOSE the region. The suspending of<a name="line.190"></a> -<span class="sourceLineNo">191</span> * the thread so it sleeps until it gets update that the OPEN/CLOSE has<a name="line.191"></a> -<span class="sourceLineNo">192</span> * succeeded is complicated. Read the implementations to learn more.<a name="line.192"></a> -<span class="sourceLineNo">193</span> */<a name="line.193"></a> -<span class="sourceLineNo">194</span> protected abstract boolean updateTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a name="line.194"></a> -<span class="sourceLineNo">195</span> throws IOException, ProcedureSuspendedException;<a name="line.195"></a> -<span class="sourceLineNo">196</span><a name="line.196"></a> -<span class="sourceLineNo">197</span> protected abstract void finishTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a name="line.197"></a> -<span class="sourceLineNo">198</span> throws IOException, ProcedureSuspendedException;<a name="line.198"></a> -<span class="sourceLineNo">199</span><a name="line.199"></a> -<span class="sourceLineNo">200</span> protected abstract void reportTransition(MasterProcedureEnv env,<a name="line.200"></a> -<span class="sourceLineNo">201</span> RegionStateNode regionNode, TransitionCode code, long seqId) throws UnexpectedStateException;<a name="line.201"></a> -<span class="sourceLineNo">202</span><a name="line.202"></a> -<span class="sourceLineNo">203</span> @Override<a name="line.203"></a> -<span class="sourceLineNo">204</span> public abstract RemoteOperation remoteCallBuild(MasterProcedureEnv env, ServerName serverName);<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> * @return True if processing of fail is complete; the procedure will be woken from its suspend<a name="line.207"></a> -<span class="sourceLineNo">208</span> * and we'll go back to running through procedure steps:<a name="line.208"></a> -<span class="sourceLineNo">209</span> * otherwise if false we leave the procedure in suspended state.<a name="line.209"></a> -<span class="sourceLineNo">210</span> */<a name="line.210"></a> -<span class="sourceLineNo">211</span> protected abstract boolean remoteCallFailed(MasterProcedureEnv env,<a name="line.211"></a> -<span class="sourceLineNo">212</span> RegionStateNode regionNode, IOException exception);<a name="line.212"></a> -<span class="sourceLineNo">213</span><a name="line.213"></a> -<span class="sourceLineNo">214</span> @Override<a name="line.214"></a> -<span class="sourceLineNo">215</span> public void remoteCallFailed(final MasterProcedureEnv env,<a name="line.215"></a> -<span class="sourceLineNo">216</span> final ServerName serverName, final IOException exception) {<a name="line.216"></a> -<span class="sourceLineNo">217</span> final RegionStateNode regionNode = getRegionState(env);<a name="line.217"></a> -<span class="sourceLineNo">218</span> String msg = exception.getMessage() == null? exception.getClass().getSimpleName():<a name="line.218"></a> -<span class="sourceLineNo">219</span> exception.getMessage();<a name="line.219"></a> -<span class="sourceLineNo">220</span> LOG.warn("Remote call failed " + this + "; " + regionNode.toShortString() +<a name="line.220"></a> -<span class="sourceLineNo">221</span> "; exception=" + msg);<a name="line.221"></a> -<span class="sourceLineNo">222</span> if (remoteCallFailed(env, regionNode, exception)) {<a name="line.222"></a> -<span class="sourceLineNo">223</span> // NOTE: This call to wakeEvent puts this Procedure back on the scheduler.<a name="line.223"></a> -<span class="sourceLineNo">224</span> // Thereafter, another Worker can be in here so DO NOT MESS WITH STATE beyond<a name="line.224"></a> -<span class="sourceLineNo">225</span> // this method. Just get out of this current processing quickly.<a name="line.225"></a> -<span class="sourceLineNo">226</span> regionNode.getProcedureEvent().wake(env.getProcedureScheduler());<a name="line.226"></a> -<span class="sourceLineNo">227</span> }<a name="line.227"></a> -<span class="sourceLineNo">228</span> // else leave the procedure in suspended state; it is waiting on another call to this callback<a name="line.228"></a> -<span class="sourceLineNo">229</span> }<a name="line.229"></a> -<span class="sourceLineNo">230</span><a name="line.230"></a> -<span class="sourceLineNo">231</span> /**<a name="line.231"></a> -<span class="sourceLineNo">232</span> * Be careful! At the end of this method, the procedure has either succeeded<a name="line.232"></a> -<span class="sourceLineNo">233</span> * and this procedure has been set into a suspended state OR, we failed and<a name="line.233"></a> -<span class="sourceLineNo">234</span> * this procedure has been put back on the scheduler ready for another worker<a name="line.234"></a> -<span class="sourceLineNo">235</span> * to pick it up. In both cases, we need to exit the current Worker processing<a name="line.235"></a> -<span class="sourceLineNo">236</span> * immediately!<a name="line.236"></a> -<span class="sourceLineNo">237</span> * @return True if we successfully dispatched the call and false if we failed;<a name="line.237"></a> -<span class="sourceLineNo">238</span> * if failed, we need to roll back any setup done for the dispatch.<a name="line.238"></a> -<span class="sourceLineNo">239</span> */<a name="line.239"></a> -<span class="sourceLineNo">240</span> protected boolean addToRemoteDispatcher(final MasterProcedureEnv env,<a name="line.240"></a> -<span class="sourceLineNo">241</span> final ServerName targetServer) {<a name="line.241"></a> -<span class="sourceLineNo">242</span> assert targetServer == null || targetServer.equals(getRegionState(env).getRegionLocation()):<a name="line.242"></a> -<span class="sourceLineNo">243</span> "targetServer=" + targetServer + " getRegionLocation=" +<a name="line.243"></a> -<span class="sourceLineNo">244</span> getRegionState(env).getRegionLocation(); // TODO<a name="line.244"></a> -<span class="sourceLineNo">245</span><a name="line.245"></a> -<span class="sourceLineNo">246</span> LOG.info("Dispatch " + this + "; " + getRegionState(env).toShortString());<a name="line.246"></a> -<span class="sourceLineNo">247</span><a name="line.247"></a> -<span class="sourceLineNo">248</span> // Put this procedure into suspended mode to wait on report of state change<a name="line.248"></a> -<span class="sourceLineNo">249</span> // from remote regionserver. Means Procedure associated ProcedureEvent is marked not 'ready'.<a name="line.249"></a> -<span class="sourceLineNo">250</span> getRegionState(env).getProcedureEvent().suspend();<a name="line.250"></a> -<span class="sourceLineNo">251</span><a name="line.251"></a> -<span class="sourceLineNo">252</span> // Tricky because the below call to addOperationToNode can fail. If it fails, we need to<a name="line.252"></a> -<span class="sourceLineNo">253</span> // backtrack on stuff like the 'suspend' done above -- tricky as the 'wake' requests us -- and<a name="line.253"></a> -<span class="sourceLineNo">254</span> // ditto up in the caller; it needs to undo state changes. Inside in remoteCallFailed, it does<a name="line.254"></a> -<span class="sourceLineNo">255</span> // wake to undo the above suspend.<a name="line.255"></a> -<span class="sourceLineNo">256</span> if (!env.getRemoteDispatcher().addOperationToNode(targetServer, this)) {<a name="line.256"></a> -<span class="sourceLineNo">257</span> remoteCallFailed(env, targetServer,<a name="line.257"></a> -<span class="sourceLineNo">258</span> new FailedRemoteDispatchException(this + " to " + targetServer));<a name="line.258"></a> -<span class="sourceLineNo">259</span> return false;<a name="line.259"></a> -<span class="sourceLineNo">260</span> }<a name="line.260"></a> -<span class="sourceLineNo">261</span> return true;<a name="line.261"></a> -<span class="sourceLineNo">262</span> }<a name="line.262"></a> -<span class="sourceLineNo">263</span><a name="line.263"></a> -<span class="sourceLineNo">264</span> protected void reportTransition(final MasterProcedureEnv env, final ServerName serverName,<a name="line.264"></a> -<span class="sourceLineNo">265</span> final TransitionCode code, final long seqId) throws UnexpectedStateException {<a name="line.265"></a> -<span class="sourceLineNo">266</span> final RegionStateNode regionNode = getRegionState(env);<a name="line.266"></a> -<span class="sourceLineNo">267</span> if (LOG.isDebugEnabled()) {<a name="line.267"></a> -<span class="sourceLineNo">268</span> LOG.debug("Received report " + code + " seqId=" + seqId + ", " +<a name="line.268"></a> -<span class="sourceLineNo">269</span> this + "; " + regionNode.toShortString());<a name="line.269"></a> -<span class="sourceLineNo">270</span> }<a name="line.270"></a> -<span class="sourceLineNo">271</span> if (!serverName.equals(regionNode.getRegionLocation())) {<a name="line.271"></a> -<span class="sourceLineNo">272</span> if (isMeta() && regionNode.getRegionLocation() == null) {<a name="line.272"></a> -<span class="sourceLineNo">273</span> regionNode.setRegionLocation(serverName);<a name="line.273"></a> -<span class="sourceLineNo">274</span> } else {<a name="line.274"></a> -<span class="sourceLineNo">275</span> throw new UnexpectedStateException(String.format(<a name="line.275"></a> -<span class="sourceLineNo">276</span> "Unexpected state=%s from server=%s; expected server=%s; %s; %s",<a name="line.276"></a> -<span class="sourceLineNo">277</span> code, serverName, regionNode.getRegionLocation(),<a name="line.277"></a> -<span class="sourceLineNo">278</span> this, regionNode.toShortString()));<a name="line.278"></a> -<span class="sourceLineNo">279</span> }<a name="line.279"></a> -<span class="sourceLineNo">280</span> }<a name="line.280"></a> -<span class="sourceLineNo">281</span><a name="line.281"></a> -<span class="sourceLineNo">282</span> reportTransition(env, regionNode, code, seqId);<a name="line.282"></a> -<span class="sourceLineNo">283</span><a name="line.283"></a> -<span class="sourceLineNo">284</span> // NOTE: This call adds this procedure back on the scheduler.<a name="line.284"></a> -<span class="sourceLineNo">285</span> // This makes it so this procedure can run again. Another worker will take<a name="line.285"></a> -<span class="sourceLineNo">286</span> // processing to the next stage. At an extreme, the other worker may run in<a name="line.286"></a> -<span class="sourceLineNo">287</span> // parallel so DO NOT CHANGE any state hereafter! This should be last thing<a name="line.287"></a> -<span class="sourceLineNo">288</span> // done in this processing step.<a name="line.288"></a> -<span class="sourceLineNo">289</span> regionNode.getProcedureEvent().wake(env.getProcedureScheduler());<a name="line.289"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.procedure2.FailedRemoteDispatchException;<a name="line.30"></a> +<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.procedure2.Procedure;<a name="line.31"></a> +<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException;<a name="line.33"></a> +<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.procedure2.RemoteProcedureDispatcher.RemoteOperation;<a name="line.34"></a> +<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.procedure2.RemoteProcedureDispatcher.RemoteProcedure;<a name="line.35"></a> +<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.procedure2.RemoteProcedureException;<a name="line.36"></a> +<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ProcedureProtos;<a name="line.37"></a> +<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.RegionTransitionState;<a name="line.38"></a> +<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;<a name="line.39"></a> +<span class="sourceLineNo">040</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.40"></a> +<span class="sourceLineNo">041</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.41"></a> +<span class="sourceLineNo">042</span>import org.slf4j.Logger;<a name="line.42"></a> +<span class="sourceLineNo">043</span>import org.slf4j.LoggerFactory;<a name="line.43"></a> +<span class="sourceLineNo">044</span><a name="line.44"></a> +<span class="sourceLineNo">045</span>/**<a name="line.45"></a> +<span class="sourceLineNo">046</span> * Base class for the Assign and Unassign Procedure.<a name="line.46"></a> +<span class="sourceLineNo">047</span> *<a name="line.47"></a> +<span class="sourceLineNo">048</span> * Locking:<a name="line.48"></a> +<span class="sourceLineNo">049</span> * Takes exclusive lock on the region being assigned/unassigned. Thus, there can only be one<a name="line.49"></a> +<span class="sourceLineNo">050</span> * RegionTransitionProcedure per region running at a time (see MasterProcedureScheduler).<a name="line.50"></a> +<span class="sourceLineNo">051</span> *<a name="line.51"></a> +<span class="sourceLineNo">052</span> * <p>This procedure is asynchronous and responds to external events.<a name="line.52"></a> +<span class="sourceLineNo">053</span> * The AssignmentManager will notify this procedure when the RS completes<a name="line.53"></a> +<span class="sourceLineNo">054</span> * the operation and reports the transitioned state<a name="line.54"></a> +<span class="sourceLineNo">055</span> * (see the Assign and Unassign class for more detail).</p><a name="line.55"></a> +<span class="sourceLineNo">056</span> *<a name="line.56"></a> +<span class="sourceLineNo">057</span> * <p>Procedures move from the REGION_TRANSITION_QUEUE state when they are<a name="line.57"></a> +<span class="sourceLineNo">058</span> * first submitted, to the REGION_TRANSITION_DISPATCH state when the request<a name="line.58"></a> +<span class="sourceLineNo">059</span> * to remote server is sent and the Procedure is suspended waiting on external<a name="line.59"></a> +<span class="sourceLineNo">060</span> * event to be woken again. Once the external event is triggered, Procedure<a name="line.60"></a> +<span class="sourceLineNo">061</span> * moves to the REGION_TRANSITION_FINISH state.</p><a name="line.61"></a> +<span class="sourceLineNo">062</span> *<a name="line.62"></a> +<span class="sourceLineNo">063</span> * <p>NOTE: {@link AssignProcedure} and {@link UnassignProcedure} should not be thought of<a name="line.63"></a> +<span class="sourceLineNo">064</span> * as being asymmetric, at least currently.<a name="line.64"></a> +<span class="sourceLineNo">065</span> * <ul><a name="line.65"></a> +<span class="sourceLineNo">066</span> * <li>{@link AssignProcedure} moves through all the above described states and implements methods<a name="line.66"></a> +<span class="sourceLineNo">067</span> * associated with each while {@link UnassignProcedure} starts at state<a name="line.67"></a> +<span class="sourceLineNo">068</span> * REGION_TRANSITION_DISPATCH and state REGION_TRANSITION_QUEUE is not supported.</li><a name="line.68"></a> +<span class="sourceLineNo">069</span> *<a name="line.69"></a> +<span class="sourceLineNo">070</span> * <li>When any step in {@link AssignProcedure} fails, failure handler<a name="line.70"></a> +<span class="sourceLineNo">071</span> * AssignProcedure#handleFailure(MasterProcedureEnv, RegionStateNode) re-attempts the<a name="line.71"></a> +<span class="sourceLineNo">072</span> * assignment by setting the procedure state to REGION_TRANSITION_QUEUE and forces<a name="line.72"></a> +<span class="sourceLineNo">073</span> * assignment to a different target server by setting {@link AssignProcedure#forceNewPlan}. When<a name="line.73"></a> +<span class="sourceLineNo">074</span> * the number of attempts reaches threshold configuration 'hbase.assignment.maximum.attempts',<a name="line.74"></a> +<span class="sourceLineNo">075</span> * the procedure is aborted. For {@link UnassignProcedure}, similar re-attempts are<a name="line.75"></a> +<span class="sourceLineNo">076</span> * intentionally not implemented. It is a 'one shot' procedure. See its class doc for how it<a name="line.76"></a> +<span class="sourceLineNo">077</span> * handles failure.<a name="line.77"></a> +<span class="sourceLineNo">078</span> * </li><a name="line.78"></a> +<span class="sourceLineNo">079</span> * <li>If we find a region in an 'unexpected' state, we'll complain and retry with backoff forever.<a name="line.79"></a> +<span class="sourceLineNo">080</span> * The 'unexpected' state needs to be fixed either by another running Procedure or by operator<a name="line.80"></a> +<span class="sourceLineNo">081</span> * intervention (Regions in 'unexpected' state indicates bug or unexpected transition type).<a name="line.81"></a> +<span class="sourceLineNo">082</span> * For this to work, subclasses need to persist the 'attempt' counter kept in this class when<a name="line.82"></a> +<span class="sourceLineNo">083</span> * they do serializeStateData and restore it inside their deserializeStateData, just as they do<a name="line.83"></a> +<span class="sourceLineNo">084</span> * for {@link #regionInfo}.<a name="line.84"></a> +<span class="sourceLineNo">085</span> * </li><a name="line.85"></a> +<span class="sourceLineNo">086</span> * </ul><a name="line.86"></a> +<span class="sourceLineNo">087</span> * </p><a name="line.87"></a> +<span class="sourceLineNo">088</span> *<a name="line.88"></a> +<span class="sourceLineNo">089</span> * <p>TODO: Considering it is a priority doing all we can to get make a region available as soon as<a name="line.89"></a> +<span class="sourceLineNo">090</span> * possible, re-attempting with any target makes sense if specified target fails in case of<a name="line.90"></a> +<span class="sourceLineNo">091</span> * {@link AssignProcedure}. For {@link UnassignProcedure}, our concern is preventing data loss<a name="line.91"></a> +<span class="sourceLineNo">092</span> * on failed unassign. See class doc for explanation.<a name="line.92"></a> +<span class="sourceLineNo">093</span> */<a name="line.93"></a> +<span class="sourceLineNo">094</span>@InterfaceAudience.Private<a name="line.94"></a> +<span class="sourceLineNo">095</span>public abstract class RegionTransitionProcedure<a name="line.95"></a> +<span class="sourceLineNo">096</span> extends Procedure<MasterProcedureEnv><a name="line.96"></a> +<span class="sourceLineNo">097</span> implements TableProcedureInterface,<a name="line.97"></a> +<span class="sourceLineNo">098</span> RemoteProcedure<MasterProcedureEnv, ServerName> {<a name="line.98"></a> +<span class="sourceLineNo">099</span> private static final Logger LOG = LoggerFactory.getLogger(RegionTransitionProcedure.class);<a name="line.99"></a> +<span class="sourceLineNo">100</span><a name="line.100"></a> +<span class="sourceLineNo">101</span> protected final AtomicBoolean aborted = new AtomicBoolean(false);<a name="line.101"></a> +<span class="sourceLineNo">102</span><a name="line.102"></a> +<span class="sourceLineNo">103</span> private RegionTransitionState transitionState = RegionTransitionState.REGION_TRANSITION_QUEUE;<a name="line.103"></a> +<span class="sourceLineNo">104</span> /**<a name="line.104"></a> +<span class="sourceLineNo">105</span> * This data member must be persisted. Expectation is that it is done by subclasses in their<a name="line.105"></a> +<span class="sourceLineNo">106</span> * {@link #serializeStateData(ProcedureStateSerializer)} call, restoring {@link #regionInfo}<a name="line.106"></a> +<span class="sourceLineNo">107</span> * in their {@link #deserializeStateData(ProcedureStateSerializer)} method.<a name="line.107"></a> +<span class="sourceLineNo">108</span> */<a name="line.108"></a> +<span class="sourceLineNo">109</span> private RegionInfo regionInfo;<a name="line.109"></a> +<span class="sourceLineNo">110</span><a name="line.110"></a> +<span class="sourceLineNo">111</span> /**<a name="line.111"></a> +<span class="sourceLineNo">112</span> * Like {@link #regionInfo}, the expectation is that subclasses persist the value of this<a name="line.112"></a> +<span class="sourceLineNo">113</span> * data member. It is used doing backoff when Procedure gets stuck.<a name="line.113"></a> +<span class="sourceLineNo">114</span> */<a name="line.114"></a> +<span class="sourceLineNo">115</span> private int attempt;<a name="line.115"></a> +<span class="sourceLineNo">116</span><a name="line.116"></a> +<span class="sourceLineNo">117</span> private volatile boolean lock = false;<a name="line.117"></a> +<span class="sourceLineNo">118</span><a name="line.118"></a> +<span class="sourceLineNo">119</span> // Required by the Procedure framework to create the procedure on replay<a name="line.119"></a> +<span class="sourceLineNo">120</span> public RegionTransitionProcedure() {}<a name="line.120"></a> +<span class="sourceLineNo">121</span><a name="line.121"></a> +<span class="sourceLineNo">122</span> public RegionTransitionProcedure(final RegionInfo regionInfo) {<a name="line.122"></a> +<span class="sourceLineNo">123</span> this.regionInfo = regionInfo;<a name="line.123"></a> +<span class="sourceLineNo">124</span> }<a name="line.124"></a> +<span class="sourceLineNo">125</span><a name="line.125"></a> +<span class="sourceLineNo">126</span> @VisibleForTesting<a name="line.126"></a> +<span class="sourceLineNo">127</span> public RegionInfo getRegionInfo() {<a name="line.127"></a> +<span class="sourceLineNo">128</span> return regionInfo;<a name="line.128"></a> +<span class="sourceLineNo">129</span> }<a name="line.129"></a> +<span class="sourceLineNo">130</span><a name="line.130"></a> +<span class="sourceLineNo">131</span> /**<a name="line.131"></a> +<span class="sourceLineNo">132</span> * This setter is for subclasses to call in their<a name="line.132"></a> +<span class="sourceLineNo">133</span> * {@link #deserializeStateData(ProcedureStateSerializer)} method. Expectation is that<a name="line.133"></a> +<span class="sourceLineNo">134</span> * subclasses will persist `regioninfo` in their<a name="line.134"></a> +<span class="sourceLineNo">135</span> * {@link #serializeStateData(ProcedureStateSerializer)} method and then restore `regionInfo` on<a name="line.135"></a> +<span class="sourceLineNo">136</span> * deserialization by calling.<a name="line.136"></a> +<span class="sourceLineNo">137</span> */<a name="line.137"></a> +<span class="sourceLineNo">138</span> protected void setRegionInfo(final RegionInfo regionInfo) {<a name="line.138"></a> +<span class="sourceLineNo">139</span> this.regionInfo = regionInfo;<a name="line.139"></a> +<span class="sourceLineNo">140</span> }<a name="line.140"></a> +<span class="sourceLineNo">141</span><a name="line.141"></a> +<span class="sourceLineNo">142</span> /**<a name="line.142"></a> +<span class="sourceLineNo">143</span> * This setter is for subclasses to call in their<a name="line.143"></a> +<span class="sourceLineNo">144</span> * {@link #deserializeStateData(ProcedureStateSerializer)} method.<a name="line.144"></a> +<span class="sourceLineNo">145</span> * @see #setRegionInfo(RegionInfo)<a name="line.145"></a> +<span class="sourceLineNo">146</span> */<a name="line.146"></a> +<span class="sourceLineNo">147</span> protected void setAttempt(int attempt) {<a name="line.147"></a> +<span class="sourceLineNo">148</span> this.attempt = attempt;<a name="line.148"></a> +<span class="sourceLineNo">149</span> }<a name="line.149"></a> +<span class="sourceLineNo">150</span><a name="line.150"></a> +<span class="sourceLineNo">151</span> protected int getAttempt() {<a name="line.151"></a> +<span class="sourceLineNo">152</span> return this.attempt;<a name="line.152"></a> +<span class="sourceLineNo">153</span> }<a name="line.153"></a> +<span class="sourceLineNo">154</span><a name="line.154"></a> +<span class="sourceLineNo">155</span> @Override<a name="line.155"></a> +<span class="sourceLineNo">156</span> public TableName getTableName() {<a name="line.156"></a> +<span class="sourceLineNo">157</span> RegionInfo hri = getRegionInfo();<a name="line.157"></a> +<span class="sourceLineNo">158</span> return hri != null? hri.getTable(): null;<a name="line.158"></a> +<span class="sourceLineNo">159</span> }<a name="line.159"></a> +<span class="sourceLineNo">160</span><a name="line.160"></a> +<span class="sourceLineNo">161</span> public boolean isMeta() {<a name="line.161"></a> +<span class="sourceLineNo">162</span> return TableName.isMetaTableName(getTableName());<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> @Override<a name="line.165"></a> +<span class="sourceLineNo">166</span> public void toStringClassDetails(final StringBuilder sb) {<a name="line.166"></a> +<span class="sourceLineNo">167</span> sb.append(getClass().getSimpleName());<a name="line.167"></a> +<span class="sourceLineNo">168</span> sb.append(" table=");<a name="line.168"></a> +<span class="sourceLineNo">169</span> sb.append(getTableName());<a name="line.169"></a> +<span class="sourceLineNo">170</span> sb.append(", region=");<a name="line.170"></a> +<span class="sourceLineNo">171</span> sb.append(getRegionInfo() == null? null: getRegionInfo().getEncodedName());<a name="line.171"></a> +<span class="sourceLineNo">172</span> }<a name="line.172"></a> +<span class="sourceLineNo">173</span><a name="line.173"></a> +<span class="sourceLineNo">174</span> public RegionStateNode getRegionState(final MasterProcedureEnv env) {<a name="line.174"></a> +<span class="sourceLineNo">175</span> return env.getAssignmentManager().getRegionStates().getOrCreateRegionStateNode(getRegionInfo());<a name="line.175"></a> +<span class="sourceLineNo">176</span> }<a name="line.176"></a> +<span class="sourceLineNo">177</span><a name="line.177"></a> +<span class="sourceLineNo">178</span> void setTransitionState(final RegionTransitionState state) {<a name="line.178"></a> +<span class="sourceLineNo">179</span> this.transitionState = state;<a name="line.179"></a> +<span class="sourceLineNo">180</span> }<a name="line.180"></a> +<span class="sourceLineNo">181</span><a name="line.181"></a> +<span class="sourceLineNo">182</span> RegionTransitionState getTransitionState() {<a name="line.182"></a> +<span class="sourceLineNo">183</span> return transitionState;<a name="line.183"></a> +<span class="sourceLineNo">184</span> }<a name="line.184"></a> +<span class="sourceLineNo">185</span><a name="line.185"></a> +<span class="sourceLineNo">186</span> protected abstract boolean startTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a name="line.186"></a> +<span class="sourceLineNo">187</span> throws IOException, ProcedureSuspendedException;<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> * Called when the Procedure is in the REGION_TRANSITION_DISPATCH state.<a name="line.190"></a> +<span class="sourceLineNo">191</span> * In here we do the RPC call to OPEN/CLOSE the region. The suspending of<a name="line.191"></a> +<span class="sourceLineNo">192</span> * the thread so it sleeps until it gets update that the OPEN/CLOSE has<a name="line.192"></a> +<span class="sourceLineNo">193</span> * succeeded is complicated. Read the implementations to learn more.<a name="line.193"></a> +<span class="sourceLineNo">194</span> */<a name="line.194"></a> +<span class="sourceLineNo">195</span> protected abstract boolean updateTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a name="line.195"></a> +<span class="sourceLineNo">196</span> throws IOException, ProcedureSuspendedException;<a name="line.196"></a> +<span class="sourceLineNo">197</span><a name="line.197"></a> +<span class="sourceLineNo">198</span> protected abstract void finishTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a name="line.198"></a> +<span class="sourceLineNo">199</span> throws IOException, ProcedureSuspendedException;<a name="line.199"></a> +<span class="sourceLineNo">200</span><a name="line.200"></a> +<span class="sourceLineNo">201</span> protected abstract void reportTransition(MasterProcedureEnv env,<a name="line.201"></a> +<span class="sourceLineNo">202</span> RegionStateNode regionNode, TransitionCode code, long seqId) throws UnexpectedStateException;<a name="line.202"></a> +<span class="sourceLineNo">203</span><a name="line.203"></a> +<span class="sourceLineNo">204</span> @Override<a name="line.204"></a> +<span class="sourceLineNo">205</span> public abstract RemoteOperation remoteCallBuild(MasterProcedureEnv env, ServerName serverName);<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> * @return True if processing of fail is complete; the procedure will be woken from its suspend<a name="line.208"></a> +<span class="sourceLineNo">209</span> * and we'll go back to running through procedure steps:<a name="line.209"></a> +<span class="sourceLineNo">210</span> * otherwise if false we leave the procedure in suspended state.<a name="line.210"></a> +<span class="sourceLineNo">211</span> */<a name="line.211"></a> +<span class="sourceLineNo">212</span> protected abstract boolean remoteCallFailed(MasterProcedureEnv env,<a name="line.212"></a> +<span class="sourceLineNo">213</span> RegionStateNode regionNode, IOException exception);<a name="line.213"></a> +<span class="sourceLineNo">214</span><a name="line.214"></a> +<span class="sourceLineNo">215</span> @Override<a name="line.215"></a> +<span class="sourceLineNo">216</span> public void remoteCallFailed(final MasterProcedureEnv env,<a name="line.216"></a> +<span class="sourceLineNo">217</span> final ServerName serverName, final IOException exception) {<a name="line.217"></a> +<span class="sourceLineNo">218</span> final RegionStateNode regionNode = getRegionState(env);<a name="line.218"></a> +<span class="sourceLineNo">219</span> LOG.warn("Remote call failed {}; {}; {}; exception={}", serverName,<a name="line.219"></a> +<span class="sourceLineNo">220</span> this, regionNode.toShortString(), exception.getClass().getSimpleName());<a name="line.220"></a> +<span class="sourceLineNo">221</span> if (remoteCallFailed(env, regionNode, exception)) {<a name="line.221"></a> +<span class="sourceLineNo">222</span> // NOTE: This call to wakeEvent puts this Procedure back on the scheduler.<a name="line.222"></a> +<span class="sourceLineNo">223</span> // Thereafter, another Worker can be in here so DO NOT MESS WITH STATE beyond<a name="line.223"></a> +<span class="sourceLineNo">224</span> // this method. Just get out of this current processing quickly.<a name="line.224"></a> +<span class="sourceLineNo">225</span> regionNode.getProcedureEvent().wake(env.getProcedureScheduler());<a name="line.225"></a> +<span class="sourceLineNo">226</span> }<a name="line.226"></a> +<span class="sourceLineNo">227</span> // else leave the procedure in suspended state; it is waiting on another call to this callback<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> /**<a name="line.230"></a> +<span class="sourceLineNo">231</span> * Be careful! At the end of this method, the procedure has either succeeded<a name="line.231"></a> +<span class="sourceLineNo">232</span> * and this procedure has been set into a suspended state OR, we failed and<a name="line.232"></a> +<span class="sourceLineNo">233</span> * this procedure has been put back on the scheduler ready for another worker<a name="line.233"></a> +<span class="sourceLineNo">234</span> * to pick it up. In both cases, we need to exit the current Worker processing<a name="line.234"></a> +<span class="sourceLineNo">235</span> * immediately!<a name="line.235"></a> +<span class="sourceLineNo">236</span> * @return True if we successfully dispatched the call and false if we failed;<a name="line.236"></a> +<span class="sourceLineNo">237</span> * if failed, we need to roll back any setup done for the dispatch.<a name="line.237"></a> +<span class="sourceLineNo">238</span> */<a name="line.238"></a> +<span class="sourceLineNo">239</span> protected boolean addToRemoteDispatcher(final MasterProcedureEnv env,<a name="line.239"></a> +<span class="sourceLineNo">240</span> final ServerName targetServer) {<a name="line.240"></a> +<span class="sourceLineNo">241</span> LOG.info("Dispatch {}; {}", this, getRegionState(env).toShortString());<a name="line.241"></a> +<span class="sourceLineNo">242</span><a name="line.242"></a> +<span class="sourceLineNo">243</span> // Put this procedure into suspended mode to wait on report of state change<a name="line.243"></a> +<span class="sourceLineNo">244</span> // from remote regionserver. Means Procedure associated ProcedureEvent is marked not 'ready'.<a name="line.244"></a> +<span class="sourceLineNo">245</span> getRegionState(env).getProcedureEvent().suspend();<a name="line.245"></a> +<span class="sourceLineNo">246</span><a name="line.246"></a> +<span class="sourceLineNo">247</span> // Tricky because the below call to addOperationToNode can fail. If it fails, we need to<a name="line.247"></a> +<span class="sourceLineNo">248</span> // backtrack on stuff like the 'suspend' done above -- tricky as the 'wake' requests us -- and<a name="line.248"></a> +<span class="sourceLineNo">249</span> // ditto up in the caller; it needs to undo state changes. Inside in remoteCallFailed, it does<a name="line.249"></a> +<span class="sourceLineNo">250</span> // wake to undo the above suspend.<a name="line.250"></a> +<span class="sourceLineNo">251</span> try {<a name="line.251"></a> +<span class="sourceLineNo">252</span> env.getRemoteDispatcher().addOperationToNode(targetServer, this);<a name="line.252"></a> +<span class="sourceLineNo">253</span> } catch (FailedRemoteDispatchException frde) {<a name="line.253"></a> +<span class="sourceLineNo">254</span> remoteCallFailed(env, targetServer, frde);<a name="line.254"></a> +<span class="sourceLineNo">255</span> return false;<a name="line.255"></a> +<span class="sourceLineNo">256</span> }<a name="line.256"></a> +<span class="sourceLineNo">257</span> return true;<a name="line.257"></a> +<span class="sourceLineNo">258</span> }<a name="line.258"></a> +<span class="sourceLineNo">259</span><a name="line.259"></a> +<span class="sourceLineNo">260</span> protected void reportTransition(final MasterProcedureEnv env, final ServerName serverName,<a name="line.260"></a> +<span class="sourceLineNo">261</span> final TransitionCode code, final long seqId) throws UnexpectedStateException {<a name="line.261"></a> +<span class="sourceLineNo">262</span> final RegionStateNode regionNode = getRegionState(env);<a name="line.262"></a> +<span class="sourceLineNo">263</span> if (LOG.isDebugEnabled()) {<a name="line.263"></a> +<span class="sourceLineNo">264</span> LOG.debug("Received report " + code + " seqId=" + seqId + ", " +<a name="line.264"></a> +<span class="sourceLineNo">265</span> this + "; " + regionNode.toShortString());<a name="line.265"></a> +<span class="sourceLineNo">266</span> }<a name="line.266"></a> +<span class="sourceLineNo">267</span> if (!serverName.equals(regionNode.getRegionLocation())) {<a name="line.267"></a> +<span class="sourceLineNo">268</span> if (isMeta() && regionNode.getRegionLocation() == null) {<a name="line.268"></a> +<span class="sourceLineNo">269</span> regionNode.setRegionLocation(serverName);<a name="line.269"></a> +<span class="sourceLineNo">270</span> } else {<a name="line.270"></a> +<span class="sourceLineNo">271</span> throw new UnexpectedStateException(String.format(<a name="line.271"></a> +<span class="sourceLineNo">272</span> "Unexpected state=%s from server=%s; expected server=%s; %s; %s",<a name="line.272"></a> +<span class="sourceLineNo">273</span> code, serverName, regionNode.getRegionLocation(),<a name="line.273"></a> +<span class="sourceLineNo">274</span> this, regionNode.toShortString()));<a name="line.274"></a> +<span class="sourceLineNo">275</span> }<a name="line.275"></a> +<span class="sourceLineNo">276</span> }<a name="line.276"></a> +<span class="sourceLineNo">277</span><a name="line.277"></a> +<span class="sourceLineNo">278</span> reportTransition(env, regionNode, code, seqId);<a name="line.278"></a> +<span class="sourceLineNo">279</span><a name="line.279"></a> +<span class="sourceLineNo">280</span> // NOTE: This call adds this procedure back on the scheduler.<a name="line.280"></a> +<span class="sourceLineNo">281</span> // This makes it so this procedure can run again. Another worker will take<a name="line.281"></a> +<span class="sourceLineNo">282</span> // processing to the next stage. At an extreme, the other worker may run in<a name="line.282"></a> +<span class="sourceLineNo">283</span> // parallel so DO NOT CHANGE any state hereafter! This should be last thing<a name="line.283"></a> +<span class="sourceLineNo">284</span> // done in this processing step.<a name="line.284"></a> +<span class="sourceLineNo">285</span> regionNode.getProcedureEvent().wake(env.getProcedureScheduler());<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> protected boolean isServerOnline(final MasterProcedureEnv env, final RegionStateNode regionNode) {<a name="line.288"></a> +<span class="sourceLineNo">289</span> return isServerOnline(env, regionNode.getRegionLocation());<a name="line.289"></a> <span class="sourceLineNo">290</span> }<a name="line.290"></a> <span class="sourceLineNo">291</span><a name="line.291"></a> -<span class="sourceLineNo">292</span> protected boolean isServerOnline(final MasterProcedureEnv env, final RegionStateNode regionNode) {<a name="line.292"></a> -<span class="sourceLineNo">293</span> return isServerOnline(env, regionNode.getRegionLocation());<a name="line.293"></a> +<span class="sourceLineNo">292</span> protected boolean isServerOnline(final MasterProcedureEnv env, final ServerName serverName) {<a name="line.292"></a> +<span class="sourceLineNo">293</span> return env.getMasterServices().getServerManager().isServerOnline(serverName);<a name="line.293"></a> <span class="sourceLineNo">294</span> }<a name="line.294"></a> <span class="sourceLineNo">295</span><a name="line.295"></a> -<span class="sourceLineNo">296</span> protected boolean isServerOnline(final MasterProcedureEnv env, final ServerName serverName) {<a name="line.296"></a> -<span class="sourceLineNo">297</span> return env.getMasterServices().getServerManager().isServerOnline(serverName);<a name="line.297"></a> -<span class="sourceLineNo">298</span> }<a name="line.298"></a> -<span class="sourceLineNo">299</span><a name="line.299"></a> -<span class="sourceLineNo">300</span> @Override<a name="line.300"></a> -<span class="sourceLineNo">301</span> protected void toStringState(StringBuilder builder) {<a name="line.301"></a> -<span class="sourceLineNo">302</span> super.toStringState(builder);<a name="line.302"></a> -<span class="sourceLineNo">303</span> RegionTransitionState ts = this.transitionState;<a name="line.303"></a> -<span class="sourceLineNo">304</span> if (!isFinished() && ts != null) {<a name="line.304"></a> -<span class="sourceLineNo">305</span> builder.append(":").append(ts);<a name="line.305"></a> -<span class="sourceLineNo">306</span> }<a name="line.306"></a> -<span class="sourceLineNo">307</span> }<a name="line.307"></a> -<span class="sourceLineNo">308</span><a name="line.308"></a> -<span class="sourceLineNo">309</span> @Override<a name="line.309"></a> -<span class="sourceLineNo">310</span> protected Procedure[] execute(final MasterProcedureEnv env) throws ProcedureSuspendedException {<a name="line.310"></a> -<span class="sourceLineNo">311</span> final AssignmentManager am = env.getAssignmentManager();<a name="line.311"></a> -<span class="sourceLineNo">312</span> final RegionStateNode regionNode = getRegionState(env);<a name="line.312"></a> -<span class="sourceLineNo">313</span> if (!am.addRegionInTransition(regionNode, this)) {<a name="line.313"></a> -<span class="sourceLineNo">314</span> String msg = String.format(<a name="line.314"></a> -<span class="sourceLineNo">315</span> "There is already another procedure running on this region this=%s owner=%s",<a name="line.315"></a> -<span class="sourceLineNo">316</span> this, regionNode.getProcedure());<a name="line.316"></a> -<span class="sourceLineNo">317</span> LOG.warn(msg + " " + this + "; " + regionNode.toShortString());<a name="line.317"></a> -<span class="sourceLineNo">318</span> setAbortFailure(getClass().getSimpleName(), msg);<a name="line.318"></a> -<span class="sourceLineNo">319</span> return null;<a name="line.319"></a> -<span class="sourceLineNo">320</span> }<a name="line.320"></a> -<span class="sourceLineNo">321</span> try {<a name="line.321"></a> -<span class="sourceLineNo">322</span> boolean retry;<a name="line.322"></a> -<span class="sourceLineNo">323</span> do {<a name="line.323"></a> -<span class="sourceLineNo">324</span> retry = false;<a name="line.324"></a> -<span class="sourceLineNo">325</span> switch (transitionState) {<a name="line.325"></a> -<span class="sourceLineNo">326</span> case REGION_TRANSITION_QUEUE:<a name="line.326"></a> -<span class="sourceLineNo">327</span> // 1. push into the AM queue for balancer policy<a name="line.327"></a> -<span class="sourceLineNo">328</span> if (!startTransition(env, regionNode)) {<a name="line.328"></a> -<span class="sourceLineNo">329</span> // The operation figured it is done or it aborted; check getException()<a name="line.329"></a> -<span class="sourceLineNo">330</span> am.removeRegionInTransition(getRegionState(env), this);<a name="line.330"></a> -<span class="sourceLineNo">331</span> return null;<a name="line.331"></a> -<span class="sourceLineNo">332</span> }<a name="line.332"></a> -<span class="sourceLineNo">333</span> transitionState = RegionTransitionState.REGION_TRANSITION_DISPATCH;<a name="line.333"></a> -<span class="sourceLineNo">334</span> if (regionNode.getProcedureEvent().suspendIfNotReady(this)) {<a name="line.334"></a> -<span class="sourceLineNo">335</span> // Why this suspend? Because we want to ensure Store happens before proceed?<a name="line.335"></a> -<span class="sourceLineNo">336</span> throw new ProcedureSuspendedException();<a name="line.336"></a> -<span class="sourceLineNo">337</span> }<a name="line.337"></a> -<span class="sourceLineNo">338</span> break;<a name="line.338"></a> -<span class="sourceLineNo">339</span><a name="line.339"></a> -<span class="sourceLineNo">340</span> case REGION_TRANSITION_DISPATCH:<a name="line.340"></a> -<span class="sourceLineNo">341</span> // 2. send the request to the target server<a name="line.341"></a> -<span class="sourceLineNo">342</span> if (!updateTransition(env, regionNode)) {<a name="line.342"></a> -<span class="sourceLineNo">343</span> // The operation figured it is done or it aborted; check getException()<a name="line.343"></a> -<span class="sourceLineNo">344</span> am.removeRegionInTransition(regionNode, this);<a name="line.344"></a> -<span class="sourceLineNo">345</span> return null;<a name="line.345"></a> +<span class="sourceLineNo">296</span> @Override<a name="line.296"></a> +<span class="sourceLineNo">297</span> protected void toStringState(StringBuilder builder) {<a name="line.297"></a> +<span class="sourceLineNo">298</span> super.toStringState(builder);<a name="line.298"></a> +<span class="sourceLineNo">299</span> RegionTransitionState ts = this.transitionState;<a name="line.299"></a> +<span class="sourceLineNo">300</span> if (!isFinished() && ts != null) {<a name="line.300"></a> +<span class="sourceLineNo">301</span> builder.append(":").append(ts);<a name="line.301"></a> +<span class="sourceLineNo">302</span> }<a name="line.302"></a> +<span class="sourceLineNo">303</span> }<a name="line.303"></a> +<span class="sourceLineNo">304</span><a name="line.304"></a> +<span class="sourceLineNo">305</span> @Override<a name="line.305"></a> +<span class="sourceLineNo">306</span> protected Procedure[] execute(final MasterProcedureEnv env) throws ProcedureSuspendedException {<a name="line.306"></a> +<span class="sourceLineNo">307</span> final AssignmentManager am = env.getAssignmentManager();<a name="line.307"></a> +<span class="sourceLineNo">308</span> final RegionStateNode regionNode = getRegionState(env);<a name="line.308"></a> +<span class="sourceLineNo">309</span> if (!am.addRegionInTransition(regionNode, this)) {<a name="line.309"></a> +<span class="sourceLineNo">310</span> String msg = String.format(<a name="line.310"></a> +<span class="sourceLineNo">311</span> "There is already another procedure running on this region this=%s owner=%s",<a name="line.311"></a> +<span class="sourceLineNo">312</span> this, regionNode.getProcedure());<a name="line.312"></a> +<span class="sourceLineNo">313</span> LOG.warn(msg + " " + this + "; " + regionNode.toShortString());<a name="line.313"></a> +<span class="sourceLineNo">314</span> setAbortFailure(getClass().getSimpleName(), msg);<a name="line.314"></a> +<span class="sourceLineNo">315</span> return null;<a name="line.315"></a> +<span class="sourceLineNo">316</span> }<a name="line.316"></a> +<span class="sourceLineNo">317</span> try {<a name="line.317"></a> +<span class="sourceLineNo">318</span> boolean retry;<a name="line.318"></a> +<span class="sourceLineNo">319</span> do {<a name="line.319"></a> +<span class="sourceLineNo">320</span> retry = false;<a name="line.320"></a> +<span class="sourceLineNo">321</span> switch (transitionState) {<a name="line.321"></a> +<span class="sourceLineNo">322</span> case REGION_TRANSITION_QUEUE:<a name="line.322"></a> +<span class="sourceLineNo">323</span> // 1. push into the AM queue for balancer policy<a name="line.323"></a> +<span class="sourceLineNo">324</span> if (!startTransition(env, regionNode)) {<a name="line.324"></a> +<span class="sourceLineNo">325</span> // The operation figured it is done or it aborted; check getException()<a name="line.325"></a> +<span class="sourceLineNo">326</span> am.removeRegionInTransition(getRegionState(env), this);<a name="line.326"></a> +<span class="sourceLineNo">327</span> return null;<a name="line.327"></a> +<span class="sourceLineNo">328</span> }<a name="line.328"></a> +<span class="sourceLineNo">329</span> transitionState = RegionTransitionState.REGION_TRANSITION_DISPATCH;<a name="line.329"></a> +<span class="sourceLineNo">330</span> if (regionNode.getProcedureEvent().suspendIfNotReady(this)) {<a name="line.330"></a> +<span class="sourceLineNo">331</span> // Why this suspend? Because we want to ensure Store happens before proceed?<a name="line.331"></a> +<span class="sourceLineNo">332</span> throw new ProcedureSuspendedException();<a name="line.332"></a> +<span class="sourceLineNo">333</span> }<a name="line.333"></a> +<span class="sourceLineNo">334</span> break;<a name="line.334"></a> +<span class="sourceLineNo">335</span><a name="line.335"></a> +<span class="sourceLineNo">336</span> case REGION_TRANSITION_DISPATCH:<a name="line.336"></a> +<span class="sourceLineNo">337</span> // 2. send the request to the target server<a name="line.337"></a> +<span class="sourceLineNo">338</span> if (!updateTransition(env, regionNode)) {<a name="line.338"></a> +<span class="sourceLineNo">339</span> // The operation figured it is done or it aborted; check getException()<a name="line.339"></a> +<span class="sourceLineNo">340</span> am.removeRegionInTransition(regionNode, this);<a name="line.340"></a> +<span class="sourceLineNo">341</span> return null;<a name="line.341"></a> +<span class="sourceLineNo">342</span> }<a name="line.342"></a> +<span class="sourceLineNo">343</span> if (transitionState != RegionTransitionState.REGION_TRANSITION_DISPATCH) {<a name="line.343"></a> +<span class="sourceLineNo">344</span> retry = true;<a name="line.344"></a> +<span class="sourceLineNo">345</span> break;<a name="line.345"></a> <span class="sourceLineNo">346</span> }<a name="line.346"></a> -<span class="sourceLineNo">347</span> if (transitionState != RegionTransitionState.REGION_TRANSITION_DISPATCH) {<a name="line.347"></a> -<span class="sourceLineNo">348</span> retry = true;<a name="line.348"></a> -<span class="sourceLineNo">349</span> break;<a name="line.349"></a> -<span class="sourceLineNo">350</span> }<a name="line.350"></a> -<span class="sourceLineNo">351</span> if (regionNode.getProcedureEvent().suspendIfNotReady(this)) {<a name="line.351"></a> -<span class="sourceLineNo">352</span> throw new ProcedureSuspendedException();<a name="line.352"></a> -<span class="sourceLineNo">353</span> }<a name="line.353"></a> -<span class="sourceLineNo">354</span> break;<a name="line.354"></a> -<span class="sourceLineNo">355</span><a name="line.355"></a> -<span class="sourceLineNo">356</span> case REGION_TRANSITION_FINISH:<a name="line.356"></a> -<span class="sourceLineNo">357</span> // 3. wait assignment response. completion/failure<a name="line.357"></a> -<span class="sourceLineNo">358</span> LOG.debug("Finishing {}; {}", this, regionNode.toShortString());<a name="line.358"></a> -<span class="sourceLineNo">359</span> finishTransition(env, regionNode);<a name="line.359"></a> -<span class="sourceLineNo">360</span> am.removeRegionInTransition(regionNode, this);<a name="line.360"></a> -<span class="sourceLineNo">361</span> return null;<a name="line.361"></a> -<span class="sourceLineNo">362</span> }<a name="line.362"></a> -<span class="sourceLineNo">363</span> } while (retry);<a name="line.363"></a> -<span class="sourceLineNo">364</span> // If here, success so clear out the attempt counter so we start fresh each time we get stuck.<a name="line.364"></a> -<span class="sourceLineNo">365</span> this.attempt = 0;<a name="line.365"></a> -<span class="sourceLineNo">366</span> } catch (IOException e) {<a name="line.366"></a> -<span class="sourceLineNo">367</span> long backoff = getBackoffTime(this.attempt++);<a name="line.367"></a> -<span class="sourceLineNo">368</span> LOG.warn("Failed transition, suspend {}secs {}; {}; waiting on rectified condition fixed " +<a name="line.368"></a> -<span class="sourceLineNo">369</span> "by other Procedure or operator intervention", backoff / 1000, this,<a name="line.369"></a> -<span class="sourceLineNo">370</span> regionNode.toShortString(), e);<a name="line.370"></a> -<span class="sourceLineNo">371</span> getRegionState(env).getProcedureEvent().suspend();<a name="line.371"></a> -<span class="sourceLineNo">372</span> if (getRegionState(env).getProcedureEvent().suspendIfNotReady(this)) {<a name="line.372"></a> -<span class="sourceLineNo">373</span> setTimeout(Math.toIntExact(backoff));<a name="line.373"></a> -<span class="sourceLineNo">374</span> setState(ProcedureProtos.ProcedureState.WAITING_TIMEOUT);<a name="line.374"></a> -<span class="sourceLineNo">375</span> throw new ProcedureSuspendedException();<a name="line.375"></a> -<span class="sourceLineNo">376</span> }<a name="line.376"></a> -<span class="sourceLineNo">377</span> }<a name="line.377"></a> -<span class="sourceLineNo">378</span><a name="line.378"></a> -<span class="sourceLineNo">379</span> return new Procedure[] {this};<a name="line.379"></a> -<span class="sourceLineNo">380</span> }<a name="line.380"></a> -<span class="sourceLineNo">381</span><a name="line.381"></a> -<span class="sourceLineNo">382</span> private long getBackoffTime(int attempts) {<a name="line.382"></a> -<span class="sourceLineNo">383</span> long backoffTime = (long)(1000 * Math.pow(2, attempts));<a name="line.383"></a> -<span class="sourceLineNo">384</span> long maxBackoffTime = 60 * 60 * 1000; // An hour. Hard-coded for for now.<a name="line.384"></a> -<span class="sourceLineNo">385</span> return backoffTime < maxBackoffTime? backoffTime: maxBackoffTime;<a name="line.385"></a> -<span class="sourceLineNo">386</span> }<a name="line.386"></a> -<span class="sourceLineNo">387</span><a name="line.387"></a> -<span class="sourceLineNo">388</span> /**<a name="line.388"></a> -<span class="sourceLineNo">389</span> * At end of timeout, wake ourselves up so we run again.<a name="line.389"></a> -<span class="sourceLineNo">390</span> */<a name="line.390"></a> -<span class="sourceLineNo">391</span> @Override<a name="line.391"></a> -<span class="sourceLineNo">392</span> protected synchronized boolean setTimeoutFailure(MasterProcedureEnv env) {<a name="line.392"></a> -<span class="sourceLineNo">393</span> setState(ProcedureProtos.ProcedureState.RUNNABLE);<a name="line.393"></a> -<span class="sourceLineNo">394</span> getRegionState(env).getProcedureEvent().wake(env.getProcedureScheduler());<a name="line.394"></a> -<span class="sourceLineNo">395</span> return false; // 'false' means that this procedure handled the timeout<a name="line.395"></a> -<span class="sourceLineNo">396</span> }<a name="line.396"></a> -<span class="sourceLineNo">397</span><a name="line.397"></a> -<span class="sourceLineNo">398</span> @Override<a name="line.398"></a> -<span class="sourceLineNo">399</span> protected void rollback(final MasterProcedureEnv env) {<a name="line.399"></a> -<span class="sourceLineNo">400</span> if (isRollbackSupported(transitionState)) {<a name="line.400"></a> -<span class="sourceLineNo">401</span> // Nothing done up to this point. abort safely.<a name="line.401"></a> -<span class="sourceLineNo">402</span> // This should happen when something like disableTable() is triggered.<a name="line.402"></a> -<span class="sourceLineNo">403</span> env.getAssignmentManager().removeRegionInTransition(getRegionState(env), this);<a name="line.403"></a> -<span class="sourceLineNo">404</span> return;<a name="line.404"></a> -<span class="sourceLineNo">405</span> }<a name="line.405"></a> -<span class="sourceLineNo">406</span><a name="line.406"></a> -<span class="sourceLineNo">407</span> // There is no rollback for assignment unless we cancel the operation by<a name="line.407"></a> -<span class="sourceLineNo">408</span> // dropping/disabling the table.<a name="line.408"></a> -<span class="sourceLineNo">409</span> throw new UnsupportedOperationException("Unhandled state " + transitionState +<a name="line.409"></a> -<span class="sourceLineNo">410</span> "; there is no rollback for assignment unless we cancel the operation by " +<a name="line.410"></a> -<span class="sourceLineNo">411</span> "dropping/disabling the table");<a name="line.411"></a> -<span class="sourceLineNo">412</span> }<a name="line.412"></a> -<span class="sourceLineNo">413</span><a name="line.413"></a> -<span class="sourceLineNo">414</span> protected abstract boolean isRollbackSupported(final 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LOG.debug(LockState.LOCK_EVENT_WAIT + " pid=" + getProcId() + " " +<a name="line.436"></a> -<span class="sourceLineNo">437</span> env.getProcedureScheduler().dumpLocks());<a name="line.437"></a> -<span class="sourceLineNo">438</span> } catch (IOException e) {<a name="line.438"></a> -<span class="sourceLineNo">439</span> // TODO Auto-generated catch block<a name="line.439"></a> -<span class="sourceLineNo">440</span> e.printStackTrace();<a name="line.440"></a> -<span class="sourceLineNo">441</span> }<a name="line.441"></a> -<span class="sourceLineNo">442</span> return LockState.LOCK_EVENT_WAIT;<a name="line.442"></a> -<span class="sourceLineNo">443</span> }<a name="line.443"></a> -<span class="sourceLineNo">444</span> this.lock = true;<a name="line.444"></a> -<span class="sourceLineNo">445</span> return LockState.LOCK_ACQUIRED;<a name="line.445"></a> -<span class="sourceLineNo">446</span> }<a name="line.446"></a> -<span class="sourceLineNo">447</span><a name="line.447"></a> -<span 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class="sourceLineNo">460</span> protected boolean hasLock(final MasterProcedureEnv env) {<a name="line.460"></a> -<span class="sourceLineNo">461</span> return lock;<a name="line.461"></a> -<span class="sourceLineNo">462</span> }<a name="line.462"></a> -<span class="sourceLineNo">463</span><a name="line.463"></a> -<span class="sourceLineNo">464</span> @Override<a name="line.464"></a> -<span class="sourceLineNo">465</span> protected boolean shouldWaitClientAck(MasterProcedureEnv env) {<a name="line.465"></a> -<span class="sourceLineNo">466</span> // The operation is triggered internally on the server<a name="line.466"></a> -<span class="sourceLineNo">467</span> // the client does not know about this procedure.<a name="line.467"></a> -<span class="sourceLineNo">468</span> return false;<a name="line.468"></a> -<span class="sourceLineNo">469</span> }<a name="line.469"></a> -<span class="sourceLineNo">470</span><a name="line.470"></a> -<span class="sourceLineNo">471</span> /**<a 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name="line.480"></a> -<span class="sourceLineNo">481</span> }<a name="line.481"></a> -<span class="sourceLineNo">482</span><a name="line.482"></a> -<span class="sourceLineNo">483</span> @Override<a name="line.483"></a> -<span class="sourceLineNo">484</span> public void remoteOperationFailed(MasterProcedureEnv env, RemoteProcedureException error) {<a name="line.484"></a> -<span class="sourceLineNo">485</span> // should not be called for region operation until we modified the open/close region procedure<a name="line.485"></a> -<span class="sourceLineNo">486</span> throw new UnsupportedOperationException();<a name="line.486"></a> -<span class="sourceLineNo">487</span> }<a name="line.487"></a> -<span class="sourceLineNo">488</span>}<a name="line.488"></a> +<span class="sourceLineNo">347</span> if (regionNode.getProcedureEvent().suspendIfNotReady(this)) {<a name="line.347"></a> +<span class="sourceLineNo">348</span> throw new ProcedureSuspendedException();<a name="line.348"></a> +<span class="sourceLineNo">349</span> }<a name="line.349"></a> +<span class="sourceLineNo">350</span> break;<a name="line.350"></a> +<span class="sourceLineNo">351</span><a name="line.351"></a> +<span class="sourceLineNo">352</span> case REGION_TRANSITION_FINISH:<a name="line.352"></a> +<span class="sourceLineNo">353</span> // 3. wait assignment response. completion/failure<a name="line.353"></a> +<span class="sourceLineNo">354</span> LOG.debug("Finishing {}; {}", this, regionNode.toShortString());<a name="line.354"></a> +<span class="sourceLineNo">355</span> finishTransition(env, regionNode);<a name="line.355"></a> +<span class="sourceLineNo">356</span> am.removeRegionInTransition(regionNode, this);<a name="line.356"></a> +<span class="sourceLineNo">357</span> return null;<a name="line.357"></a> +<span class="sourceLineNo">358</span> }<a name="line.358"></a> +<span class="sourceLineNo">359</span> } while (retry);<a name="line.359"></a> +<span class="sourceLineNo">360</span> // If here, success so clear out the attempt counter so we start fresh each time we get stuck.<a name="line.360"></a> +<span class="sourceLineNo">361</span> this.attempt = 0;<a name="line.361"></a> +<span class="sourceLineNo">362</span> } catch (IOException e) {<a name="line.362"></a> +<span class="sourceLineNo">363</span> long backoff = getBackoffTime(this.attempt++);<a name="line.363"></a> +<span class="sourceLineNo">364</span> LOG.warn("Failed transition, suspend {}secs {}; {}; waiting on rectified condition fixed " +<a name="line.364"></a> +<span class="sourceLineNo">365</span> "by other Procedure or operator intervention", backoff / 1000, this,<a name="line.365"></a> +<span class="sourceLineNo">366</span> regionNode.toShortString(), e);<a name="line.366"></a> +<span class="sourceLineNo">367</span> getRegionState(env).getProcedureEvent().suspend();<a name="line.367"></a> +<span class="sourceLineNo">368</span> if (getRegionState(env).getProcedureEvent().suspendIfNotReady(this)) {<a name="line.368"></a> +<span class="sourceLineNo">369</span> setTimeout(Math.toIntExact(backoff));<a name="line.369"></a> +<span class="sourceLineNo">370</span> setState(ProcedureProtos.ProcedureState.WAITING_TIMEOUT);<a name="line.370"></a> +<span class="sourceLineNo">371</span> throw new ProcedureSuspendedException();<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><a name="line.374"></a> +<span class="sourceLineNo">375</span> return new Procedure[] {this};<a name="line.375"></a> +<span class="sourceLineNo">376</span> }<a name="line.376"></a> +<span class="sourceLineNo">377</span><a name="line.377"></a> +<span class="sourceLineNo">378</span> private long getBackoffTime(int attempts) {<a name="line.378"></a> +<span class="sourceLineNo">379</span> long backoffTime = (long)(1000 * Math.pow(2, attempts));<a name="line.379"></a> +<span class="sourceLineNo">380</span> long maxBackoffTime = 60 * 60 * 1000; // An hour. Hard-coded for for now.<a name="line.380"></a> +<span class="sourceLineNo">381</span> return backoffTime < maxBackoffTime? backoffTime: maxBackoffTime;<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> * At end of timeout, wake ourselves up so we run again.<a name="line.385"></a> +<span class="sourceLineNo">386</span> */<a name="line.386"></a> +<span class="sourceLineNo">387</span> @Override<a name="line.387"></a> +<span class="sourceLineNo">388</span> protected synchronized boolean setTimeoutFailure(MasterProcedureEnv env) {<a name="line.388"></a> +<span class="sourceLineNo">389</span> setState(ProcedureProtos.ProcedureState.RUNNABLE);<a name="line.389"></a> +<span class="sourceLineNo">390</span> getRegionState(env).getProcedureEvent().wake(env.getProcedureScheduler());<a name="line.390"></a> +<span class="sourceLineNo">391</span> return false; // 'false' means that this procedure handled the timeout<a name="line.391"></a> +<span class="sourceLineNo">392</span> }<a name="line.392"></a> +<span class="sourceLineNo">393</span><a name="line.393"></a> +<span class="sourceLineNo">394</span> @Override<a name="line.394"></a> +<span class="sourceLineNo">395</span> protected void rollback(final MasterProcedureEnv env) {<a name="line.395"></a> +<span class="sourceLineNo">396</span> if (isRollbackSupported(transitionState)) {<a name="line.396"></a> +<span class="sourceLineNo">397</span> // Nothing done up to this point. abort safely.<a name="line.397"></a> +<span class="sourceLineNo">398</span> // This should happen when something like disableTable() is triggered.<a name="line.398"></a> +<span class="sourceLineNo">399</span> env.getAssignmentManager().removeRegionInTransition(getRegionState(env), this);<a name="line.399"></a> +<span class="sourceLineNo">400</span> return;<a name="line.400"></a> +<span class="sourceLineNo">401</span> }<a name="line.401"></a> +<span class="sourceLineNo">402</span><a name="line.402"></a> +<span class="sourceLineNo">403</span> // There is no rollback for assignment unless we cancel the operation by<a name="line.403"></a> +<span class="sourceLineNo">404</span> // dropping/disabling the table.<a name="line.404"></a> +<span class="sourceLineNo">405</span> throw new UnsupportedOperationException("Unhandled state " + transitionState +<a name="line.405"></a> +<span class="sourceLineNo">406</span> "; there is no rollback for assignment unless we cancel the operation by " +<a name="line.406"></a> +<span class="sourceLineNo">407</span> "dropping/disabling the table");<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> protected abstract boolean isRollbackSupported(final RegionTransitionState state);<a name="line.410"></a> +<span class="sourceLineNo">411</span><a name="line.411"></a> +<span class="sourceLineNo">412</span> @Override<a name="line.412"></a> +<span class="sourceLineNo">413</span> protected boolean abort(final MasterProcedureEnv env) {<a name="line.413"></a> +<span class="sourceLineNo">414</span> if (isRollbackSupported(transitionState)) {<a name="line.414"></a> +<span class="sourceLineNo">415</span> aborted.set(true);<a name="line.415"></a> +<span class="sourceLineNo">416</span> return true;<a name="line.416"></a> +<span class="sourceLineNo">417</span> }<a name="line.417"></a> +<span class="sourceLineNo">418</span> return false;<a name="line.418"></a> +<span class="sourceLineNo">419</span> }<a name="line.419"></a> +<span class="sourceLineNo">420</span><a name="line.420"></a> +<span class="sourceLineNo">421</span> @Override<a name="line.421"></a> +<span class="sourceLineNo">422</span> protected LockState acquireLock(final MasterProcedureEnv
<TRUNCATED>
