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From mi...@apache.org
Subject [02/52] [partial] hbase-site git commit: Published site at 3e0602be1665e6170b0addec59bbe8785da300b0.
Date Wed, 22 Jun 2016 16:14:34 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/ae5da13b/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.html
index 991cce0..8bed235 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.html
@@ -46,490 +46,489 @@
 <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.HRegionInfo;<a name="line.38"></a>
 <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.HTableDescriptor;<a name="line.39"></a>
 <span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.TableDescriptor;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.TableExistsException;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.TableName;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.errorhandling.ForeignException;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.master.MasterCoprocessorHost;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.master.MasterFileSystem;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.master.MetricsSnapshot;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.master.procedure.CreateTableProcedure.CreateHdfsRegions;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.monitoring.MonitoredTask;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.monitoring.TaskMonitor;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.procedure2.StateMachineProcedure;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.protobuf.ProtobufUtil;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.CloneSnapshotState;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.util.FSTableDescriptors;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;<a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.snapshot.ClientSnapshotDescriptionUtils;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.snapshot.RestoreSnapshotException;<a name="line.62"></a>
-<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper;<a name="line.63"></a>
-<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;<a name="line.64"></a>
-<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.snapshot.SnapshotManifest;<a name="line.65"></a>
-<span class="sourceLineNo">066</span>import org.apache.hadoop.security.UserGroupInformation;<a name="line.66"></a>
-<span class="sourceLineNo">067</span><a name="line.67"></a>
-<span class="sourceLineNo">068</span>import com.google.common.base.Preconditions;<a name="line.68"></a>
-<span class="sourceLineNo">069</span><a name="line.69"></a>
-<span class="sourceLineNo">070</span>@InterfaceAudience.Private<a name="line.70"></a>
-<span class="sourceLineNo">071</span>public class CloneSnapshotProcedure<a name="line.71"></a>
-<span class="sourceLineNo">072</span>    extends StateMachineProcedure&lt;MasterProcedureEnv, CloneSnapshotState&gt;<a name="line.72"></a>
-<span class="sourceLineNo">073</span>    implements TableProcedureInterface {<a name="line.73"></a>
-<span class="sourceLineNo">074</span>  private static final Log LOG = LogFactory.getLog(CloneSnapshotProcedure.class);<a name="line.74"></a>
-<span class="sourceLineNo">075</span><a name="line.75"></a>
-<span class="sourceLineNo">076</span>  private final AtomicBoolean aborted = new AtomicBoolean(false);<a name="line.76"></a>
-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span>  private UserGroupInformation user;<a name="line.78"></a>
-<span class="sourceLineNo">079</span>  private HTableDescriptor hTableDescriptor;<a name="line.79"></a>
-<span class="sourceLineNo">080</span>  private SnapshotDescription snapshot;<a name="line.80"></a>
-<span class="sourceLineNo">081</span>  private List&lt;HRegionInfo&gt; newRegions = null;<a name="line.81"></a>
-<span class="sourceLineNo">082</span>  private Map&lt;String, Pair&lt;String, String&gt; &gt; parentsToChildrenPairMap =<a name="line.82"></a>
-<span class="sourceLineNo">083</span>    new HashMap&lt;String, Pair&lt;String, String&gt;&gt;();<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span>  // Monitor<a name="line.85"></a>
-<span class="sourceLineNo">086</span>  private MonitoredTask monitorStatus = null;<a name="line.86"></a>
-<span class="sourceLineNo">087</span><a name="line.87"></a>
-<span class="sourceLineNo">088</span>  private Boolean traceEnabled = null;<a name="line.88"></a>
-<span class="sourceLineNo">089</span><a name="line.89"></a>
-<span class="sourceLineNo">090</span>  /**<a name="line.90"></a>
-<span class="sourceLineNo">091</span>   * Constructor (for failover)<a name="line.91"></a>
-<span class="sourceLineNo">092</span>   */<a name="line.92"></a>
-<span class="sourceLineNo">093</span>  public CloneSnapshotProcedure() {<a name="line.93"></a>
-<span class="sourceLineNo">094</span>  }<a name="line.94"></a>
-<span class="sourceLineNo">095</span><a name="line.95"></a>
-<span class="sourceLineNo">096</span>  /**<a name="line.96"></a>
-<span class="sourceLineNo">097</span>   * Constructor<a name="line.97"></a>
-<span class="sourceLineNo">098</span>   * @param env MasterProcedureEnv<a name="line.98"></a>
-<span class="sourceLineNo">099</span>   * @param hTableDescriptor the table to operate on<a name="line.99"></a>
-<span class="sourceLineNo">100</span>   * @param snapshot snapshot to clone from<a name="line.100"></a>
-<span class="sourceLineNo">101</span>   * @throws IOException<a name="line.101"></a>
-<span class="sourceLineNo">102</span>   */<a name="line.102"></a>
-<span class="sourceLineNo">103</span>  public CloneSnapshotProcedure(<a name="line.103"></a>
-<span class="sourceLineNo">104</span>      final MasterProcedureEnv env,<a name="line.104"></a>
-<span class="sourceLineNo">105</span>      final HTableDescriptor hTableDescriptor,<a name="line.105"></a>
-<span class="sourceLineNo">106</span>      final SnapshotDescription snapshot)<a name="line.106"></a>
-<span class="sourceLineNo">107</span>      throws IOException {<a name="line.107"></a>
-<span class="sourceLineNo">108</span>    this.hTableDescriptor = hTableDescriptor;<a name="line.108"></a>
-<span class="sourceLineNo">109</span>    this.snapshot = snapshot;<a name="line.109"></a>
-<span class="sourceLineNo">110</span>    this.user = env.getRequestUser().getUGI();<a name="line.110"></a>
-<span class="sourceLineNo">111</span>    this.setOwner(this.user.getShortUserName());<a name="line.111"></a>
-<span class="sourceLineNo">112</span><a name="line.112"></a>
-<span class="sourceLineNo">113</span>    getMonitorStatus();<a name="line.113"></a>
-<span class="sourceLineNo">114</span>  }<a name="line.114"></a>
-<span class="sourceLineNo">115</span><a name="line.115"></a>
-<span class="sourceLineNo">116</span>  /**<a name="line.116"></a>
-<span class="sourceLineNo">117</span>   * Set up monitor status if it is not created.<a name="line.117"></a>
-<span class="sourceLineNo">118</span>   */<a name="line.118"></a>
-<span class="sourceLineNo">119</span>  private MonitoredTask getMonitorStatus() {<a name="line.119"></a>
-<span class="sourceLineNo">120</span>    if (monitorStatus == null) {<a name="line.120"></a>
-<span class="sourceLineNo">121</span>      monitorStatus = TaskMonitor.get().createStatus("Cloning  snapshot '" + snapshot.getName() +<a name="line.121"></a>
-<span class="sourceLineNo">122</span>        "' to table " + getTableName());<a name="line.122"></a>
-<span class="sourceLineNo">123</span>    }<a name="line.123"></a>
-<span class="sourceLineNo">124</span>    return monitorStatus;<a name="line.124"></a>
-<span class="sourceLineNo">125</span>  }<a name="line.125"></a>
-<span class="sourceLineNo">126</span><a name="line.126"></a>
-<span class="sourceLineNo">127</span>  @Override<a name="line.127"></a>
-<span class="sourceLineNo">128</span>  protected Flow executeFromState(final MasterProcedureEnv env, final CloneSnapshotState state)<a name="line.128"></a>
-<span class="sourceLineNo">129</span>      throws InterruptedException {<a name="line.129"></a>
-<span class="sourceLineNo">130</span>    if (isTraceEnabled()) {<a name="line.130"></a>
-<span class="sourceLineNo">131</span>      LOG.trace(this + " execute state=" + state);<a name="line.131"></a>
-<span class="sourceLineNo">132</span>    }<a name="line.132"></a>
-<span class="sourceLineNo">133</span>    try {<a name="line.133"></a>
-<span class="sourceLineNo">134</span>      switch (state) {<a name="line.134"></a>
-<span class="sourceLineNo">135</span>        case CLONE_SNAPSHOT_PRE_OPERATION:<a name="line.135"></a>
-<span class="sourceLineNo">136</span>          // Verify if we can clone the table<a name="line.136"></a>
-<span class="sourceLineNo">137</span>          prepareClone(env);<a name="line.137"></a>
-<span class="sourceLineNo">138</span><a name="line.138"></a>
-<span class="sourceLineNo">139</span>          preCloneSnapshot(env);<a name="line.139"></a>
-<span class="sourceLineNo">140</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_WRITE_FS_LAYOUT);<a name="line.140"></a>
-<span class="sourceLineNo">141</span>          break;<a name="line.141"></a>
-<span class="sourceLineNo">142</span>        case CLONE_SNAPSHOT_WRITE_FS_LAYOUT:<a name="line.142"></a>
-<span class="sourceLineNo">143</span>          newRegions = createFilesystemLayout(env, hTableDescriptor, newRegions);<a name="line.143"></a>
-<span class="sourceLineNo">144</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_ADD_TO_META);<a name="line.144"></a>
-<span class="sourceLineNo">145</span>          break;<a name="line.145"></a>
-<span class="sourceLineNo">146</span>        case CLONE_SNAPSHOT_ADD_TO_META:<a name="line.146"></a>
-<span class="sourceLineNo">147</span>          addRegionsToMeta(env);<a name="line.147"></a>
-<span class="sourceLineNo">148</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_ASSIGN_REGIONS);<a name="line.148"></a>
-<span class="sourceLineNo">149</span>          break;<a name="line.149"></a>
-<span class="sourceLineNo">150</span>        case CLONE_SNAPSHOT_ASSIGN_REGIONS:<a name="line.150"></a>
-<span class="sourceLineNo">151</span>          CreateTableProcedure.assignRegions(env, getTableName(), newRegions);<a name="line.151"></a>
-<span class="sourceLineNo">152</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_UPDATE_DESC_CACHE);<a name="line.152"></a>
-<span class="sourceLineNo">153</span>          break;<a name="line.153"></a>
-<span class="sourceLineNo">154</span>        case CLONE_SNAPSHOT_UPDATE_DESC_CACHE:<a name="line.154"></a>
-<span class="sourceLineNo">155</span>          CreateTableProcedure.updateTableDescCache(env, getTableName());<a name="line.155"></a>
-<span class="sourceLineNo">156</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_POST_OPERATION);<a name="line.156"></a>
-<span class="sourceLineNo">157</span>          break;<a name="line.157"></a>
-<span class="sourceLineNo">158</span>        case CLONE_SNAPSHOT_POST_OPERATION:<a name="line.158"></a>
-<span class="sourceLineNo">159</span>          postCloneSnapshot(env);<a name="line.159"></a>
-<span class="sourceLineNo">160</span><a name="line.160"></a>
-<span class="sourceLineNo">161</span>          MetricsSnapshot metricsSnapshot = new MetricsSnapshot();<a name="line.161"></a>
-<span class="sourceLineNo">162</span>          metricsSnapshot.addSnapshotClone(<a name="line.162"></a>
-<span class="sourceLineNo">163</span>            getMonitorStatus().getCompletionTimestamp() - getMonitorStatus().getStartTime());<a name="line.163"></a>
-<span class="sourceLineNo">164</span>          getMonitorStatus().markComplete("Clone snapshot '"+ snapshot.getName() +"' completed!");<a name="line.164"></a>
-<span class="sourceLineNo">165</span>          return Flow.NO_MORE_STATE;<a name="line.165"></a>
-<span class="sourceLineNo">166</span>        default:<a name="line.166"></a>
-<span class="sourceLineNo">167</span>          throw new UnsupportedOperationException("unhandled state=" + state);<a name="line.167"></a>
-<span class="sourceLineNo">168</span>      }<a name="line.168"></a>
-<span class="sourceLineNo">169</span>    } catch (IOException e) {<a name="line.169"></a>
-<span class="sourceLineNo">170</span>      LOG.error("Error trying to create table=" + getTableName() + " state=" + state, e);<a name="line.170"></a>
-<span class="sourceLineNo">171</span>      setFailure("master-create-table", e);<a name="line.171"></a>
-<span class="sourceLineNo">172</span>    }<a name="line.172"></a>
-<span class="sourceLineNo">173</span>    return Flow.HAS_MORE_STATE;<a name="line.173"></a>
-<span class="sourceLineNo">174</span>  }<a name="line.174"></a>
-<span class="sourceLineNo">175</span><a name="line.175"></a>
-<span class="sourceLineNo">176</span>  @Override<a name="line.176"></a>
-<span class="sourceLineNo">177</span>  protected void rollbackState(final MasterProcedureEnv env, final CloneSnapshotState state)<a name="line.177"></a>
-<span class="sourceLineNo">178</span>      throws IOException {<a name="line.178"></a>
-<span class="sourceLineNo">179</span>    if (isTraceEnabled()) {<a name="line.179"></a>
-<span class="sourceLineNo">180</span>      LOG.trace(this + " rollback state=" + state);<a name="line.180"></a>
-<span class="sourceLineNo">181</span>    }<a name="line.181"></a>
-<span class="sourceLineNo">182</span>    try {<a name="line.182"></a>
-<span class="sourceLineNo">183</span>      switch (state) {<a name="line.183"></a>
-<span class="sourceLineNo">184</span>        case CLONE_SNAPSHOT_POST_OPERATION:<a name="line.184"></a>
-<span class="sourceLineNo">185</span>          // TODO-MAYBE: call the deleteTable coprocessor event?<a name="line.185"></a>
-<span class="sourceLineNo">186</span>          break;<a name="line.186"></a>
-<span class="sourceLineNo">187</span>        case CLONE_SNAPSHOT_UPDATE_DESC_CACHE:<a name="line.187"></a>
-<span class="sourceLineNo">188</span>          DeleteTableProcedure.deleteTableDescriptorCache(env, getTableName());<a name="line.188"></a>
-<span class="sourceLineNo">189</span>          break;<a name="line.189"></a>
-<span class="sourceLineNo">190</span>        case CLONE_SNAPSHOT_ASSIGN_REGIONS:<a name="line.190"></a>
-<span class="sourceLineNo">191</span>          DeleteTableProcedure.deleteAssignmentState(env, getTableName());<a name="line.191"></a>
-<span class="sourceLineNo">192</span>          break;<a name="line.192"></a>
-<span class="sourceLineNo">193</span>        case CLONE_SNAPSHOT_ADD_TO_META:<a name="line.193"></a>
-<span class="sourceLineNo">194</span>          DeleteTableProcedure.deleteFromMeta(env, getTableName(), newRegions);<a name="line.194"></a>
-<span class="sourceLineNo">195</span>          break;<a name="line.195"></a>
-<span class="sourceLineNo">196</span>        case CLONE_SNAPSHOT_WRITE_FS_LAYOUT:<a name="line.196"></a>
-<span class="sourceLineNo">197</span>          DeleteTableProcedure.deleteFromFs(env, getTableName(), newRegions, false);<a name="line.197"></a>
-<span class="sourceLineNo">198</span>          break;<a name="line.198"></a>
-<span class="sourceLineNo">199</span>        case CLONE_SNAPSHOT_PRE_OPERATION:<a name="line.199"></a>
-<span class="sourceLineNo">200</span>          DeleteTableProcedure.deleteTableStates(env, getTableName());<a name="line.200"></a>
-<span class="sourceLineNo">201</span>          // TODO-MAYBE: call the deleteTable coprocessor event?<a name="line.201"></a>
-<span class="sourceLineNo">202</span>          break;<a name="line.202"></a>
-<span class="sourceLineNo">203</span>        default:<a name="line.203"></a>
-<span class="sourceLineNo">204</span>          throw new UnsupportedOperationException("unhandled state=" + state);<a name="line.204"></a>
-<span class="sourceLineNo">205</span>      }<a name="line.205"></a>
-<span class="sourceLineNo">206</span>    } catch (IOException e) {<a name="line.206"></a>
-<span class="sourceLineNo">207</span>      // This will be retried. Unless there is a bug in the code,<a name="line.207"></a>
-<span class="sourceLineNo">208</span>      // this should be just a "temporary error" (e.g. network down)<a name="line.208"></a>
-<span class="sourceLineNo">209</span>      LOG.warn("Failed rollback attempt step=" + state + " table=" + getTableName(), e);<a name="line.209"></a>
-<span class="sourceLineNo">210</span>      throw e;<a name="line.210"></a>
-<span class="sourceLineNo">211</span>    }<a name="line.211"></a>
-<span class="sourceLineNo">212</span>  }<a name="line.212"></a>
-<span class="sourceLineNo">213</span><a name="line.213"></a>
-<span class="sourceLineNo">214</span>  @Override<a name="line.214"></a>
-<span class="sourceLineNo">215</span>  protected CloneSnapshotState getState(final int stateId) {<a name="line.215"></a>
-<span class="sourceLineNo">216</span>    return CloneSnapshotState.valueOf(stateId);<a name="line.216"></a>
-<span class="sourceLineNo">217</span>  }<a name="line.217"></a>
-<span class="sourceLineNo">218</span><a name="line.218"></a>
-<span class="sourceLineNo">219</span>  @Override<a name="line.219"></a>
-<span class="sourceLineNo">220</span>  protected int getStateId(final CloneSnapshotState state) {<a name="line.220"></a>
-<span class="sourceLineNo">221</span>    return state.getNumber();<a name="line.221"></a>
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-<span class="sourceLineNo">223</span><a name="line.223"></a>
-<span class="sourceLineNo">224</span>  @Override<a name="line.224"></a>
-<span class="sourceLineNo">225</span>  protected CloneSnapshotState getInitialState() {<a name="line.225"></a>
-<span class="sourceLineNo">226</span>    return CloneSnapshotState.CLONE_SNAPSHOT_PRE_OPERATION;<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>  @Override<a name="line.229"></a>
-<span class="sourceLineNo">230</span>  protected void setNextState(final CloneSnapshotState state) {<a name="line.230"></a>
-<span class="sourceLineNo">231</span>    if (aborted.get()) {<a name="line.231"></a>
-<span class="sourceLineNo">232</span>      setAbortFailure("clone-snapshot", "abort requested");<a name="line.232"></a>
-<span class="sourceLineNo">233</span>    } else {<a name="line.233"></a>
-<span class="sourceLineNo">234</span>      super.setNextState(state);<a name="line.234"></a>
-<span class="sourceLineNo">235</span>    }<a name="line.235"></a>
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-<span class="sourceLineNo">237</span><a name="line.237"></a>
-<span class="sourceLineNo">238</span>  @Override<a name="line.238"></a>
-<span class="sourceLineNo">239</span>  public TableName getTableName() {<a name="line.239"></a>
-<span class="sourceLineNo">240</span>    return hTableDescriptor.getTableName();<a name="line.240"></a>
-<span class="sourceLineNo">241</span>  }<a name="line.241"></a>
-<span class="sourceLineNo">242</span><a name="line.242"></a>
-<span class="sourceLineNo">243</span>  @Override<a name="line.243"></a>
-<span class="sourceLineNo">244</span>  public TableOperationType getTableOperationType() {<a name="line.244"></a>
-<span class="sourceLineNo">245</span>    return TableOperationType.CREATE; // Clone is creating a table<a name="line.245"></a>
-<span class="sourceLineNo">246</span>  }<a name="line.246"></a>
-<span class="sourceLineNo">247</span><a name="line.247"></a>
-<span class="sourceLineNo">248</span>  @Override<a name="line.248"></a>
-<span class="sourceLineNo">249</span>  public boolean abort(final MasterProcedureEnv env) {<a name="line.249"></a>
-<span class="sourceLineNo">250</span>    aborted.set(true);<a name="line.250"></a>
-<span class="sourceLineNo">251</span>    return true;<a name="line.251"></a>
-<span class="sourceLineNo">252</span>  }<a name="line.252"></a>
-<span class="sourceLineNo">253</span><a name="line.253"></a>
-<span class="sourceLineNo">254</span>  @Override<a name="line.254"></a>
-<span class="sourceLineNo">255</span>  public void toStringClassDetails(StringBuilder sb) {<a name="line.255"></a>
-<span class="sourceLineNo">256</span>    sb.append(getClass().getSimpleName());<a name="line.256"></a>
-<span class="sourceLineNo">257</span>    sb.append(" (table=");<a name="line.257"></a>
-<span class="sourceLineNo">258</span>    sb.append(getTableName());<a name="line.258"></a>
-<span class="sourceLineNo">259</span>    sb.append(" snapshot=");<a name="line.259"></a>
-<span class="sourceLineNo">260</span>    sb.append(snapshot);<a name="line.260"></a>
-<span class="sourceLineNo">261</span>    sb.append(")");<a name="line.261"></a>
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-<span class="sourceLineNo">263</span><a name="line.263"></a>
-<span class="sourceLineNo">264</span>  @Override<a name="line.264"></a>
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-<span class="sourceLineNo">500</span>   * Add regions to hbase:meta table.<a name="line.500"></a>
-<span class="sourceLineNo">501</span>   * @param env MasterProcedureEnv<a name="line.501"></a>
-<span class="sourceLineNo">502</span>   * @throws IOException<a name="line.502"></a>
-<span class="sourceLineNo">503</span>   */<a name="line.503"></a>
-<span class="sourceLineNo">504</span>  private void addRegionsToMeta(final MasterProcedureEnv env) throws IOException {<a name="line.504"></a>
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-<span class="sourceLineNo">506</span><a name="line.506"></a>
-<span class="sourceLineNo">507</span>    RestoreSnapshotHelper.RestoreMetaChanges metaChanges =<a name="line.507"></a>
-<span class="sourceLineNo">508</span>        new RestoreSnapshotHelper.RestoreMetaChanges(<a name="line.508"></a>
-<span class="sourceLineNo">509</span>          hTableDescriptor, parentsToChildrenPairMap);<a name="line.509"></a>
-<span class="sourceLineNo">510</span>    metaChanges.updateMetaParentRegions(env.getMasterServices().getConnection(), newRegions);<a name="line.510"></a>
-<span class="sourceLineNo">511</span>  }<a name="line.511"></a>
-<span class="sourceLineNo">512</span><a name="line.512"></a>
-<span class="sourceLineNo">513</span>  /**<a name="line.513"></a>
-<span class="sourceLineNo">514</span>   * The procedure could be restarted from a different machine. If the variable is null, we need to<a name="line.514"></a>
-<span class="sourceLineNo">515</span>   * retrieve it.<a name="line.515"></a>
-<span class="sourceLineNo">516</span>   * @return traceEnabled<a name="line.516"></a>
-<span class="sourceLineNo">517</span>   */<a name="line.517"></a>
-<span class="sourceLineNo">518</span>  private Boolean isTraceEnabled() {<a name="line.518"></a>
-<span class="sourceLineNo">519</span>    if (traceEnabled == null) {<a name="line.519"></a>
-<span class="sourceLineNo">520</span>      traceEnabled = LOG.isTraceEnabled();<a name="line.520"></a>
-<span class="sourceLineNo">521</span>    }<a name="line.521"></a>
-<span class="sourceLineNo">522</span>    return traceEnabled;<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">041</span>import org.apache.hadoop.hbase.TableExistsException;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.TableName;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.errorhandling.ForeignException;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.master.MasterCoprocessorHost;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.master.MasterFileSystem;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.master.MetricsSnapshot;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.master.procedure.CreateTableProcedure.CreateHdfsRegions;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.monitoring.MonitoredTask;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.monitoring.TaskMonitor;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.procedure2.StateMachineProcedure;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.protobuf.ProtobufUtil;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.CloneSnapshotState;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.util.FSTableDescriptors;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.snapshot.ClientSnapshotDescriptionUtils;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.snapshot.RestoreSnapshotException;<a name="line.61"></a>
+<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper;<a name="line.62"></a>
+<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;<a name="line.63"></a>
+<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.snapshot.SnapshotManifest;<a name="line.64"></a>
+<span class="sourceLineNo">065</span>import org.apache.hadoop.security.UserGroupInformation;<a name="line.65"></a>
+<span class="sourceLineNo">066</span><a name="line.66"></a>
+<span class="sourceLineNo">067</span>import com.google.common.base.Preconditions;<a name="line.67"></a>
+<span class="sourceLineNo">068</span><a name="line.68"></a>
+<span class="sourceLineNo">069</span>@InterfaceAudience.Private<a name="line.69"></a>
+<span class="sourceLineNo">070</span>public class CloneSnapshotProcedure<a name="line.70"></a>
+<span class="sourceLineNo">071</span>    extends StateMachineProcedure&lt;MasterProcedureEnv, CloneSnapshotState&gt;<a name="line.71"></a>
+<span class="sourceLineNo">072</span>    implements TableProcedureInterface {<a name="line.72"></a>
+<span class="sourceLineNo">073</span>  private static final Log LOG = LogFactory.getLog(CloneSnapshotProcedure.class);<a name="line.73"></a>
+<span class="sourceLineNo">074</span><a name="line.74"></a>
+<span class="sourceLineNo">075</span>  private final AtomicBoolean aborted = new AtomicBoolean(false);<a name="line.75"></a>
+<span class="sourceLineNo">076</span><a name="line.76"></a>
+<span class="sourceLineNo">077</span>  private UserGroupInformation user;<a name="line.77"></a>
+<span class="sourceLineNo">078</span>  private HTableDescriptor hTableDescriptor;<a name="line.78"></a>
+<span class="sourceLineNo">079</span>  private SnapshotDescription snapshot;<a name="line.79"></a>
+<span class="sourceLineNo">080</span>  private List&lt;HRegionInfo&gt; newRegions = null;<a name="line.80"></a>
+<span class="sourceLineNo">081</span>  private Map&lt;String, Pair&lt;String, String&gt; &gt; parentsToChildrenPairMap =<a name="line.81"></a>
+<span class="sourceLineNo">082</span>    new HashMap&lt;String, Pair&lt;String, String&gt;&gt;();<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span>  // Monitor<a name="line.84"></a>
+<span class="sourceLineNo">085</span>  private MonitoredTask monitorStatus = null;<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span>  private Boolean traceEnabled = null;<a name="line.87"></a>
+<span class="sourceLineNo">088</span><a name="line.88"></a>
+<span class="sourceLineNo">089</span>  /**<a name="line.89"></a>
+<span class="sourceLineNo">090</span>   * Constructor (for failover)<a name="line.90"></a>
+<span class="sourceLineNo">091</span>   */<a name="line.91"></a>
+<span class="sourceLineNo">092</span>  public CloneSnapshotProcedure() {<a name="line.92"></a>
+<span class="sourceLineNo">093</span>  }<a name="line.93"></a>
+<span class="sourceLineNo">094</span><a name="line.94"></a>
+<span class="sourceLineNo">095</span>  /**<a name="line.95"></a>
+<span class="sourceLineNo">096</span>   * Constructor<a name="line.96"></a>
+<span class="sourceLineNo">097</span>   * @param env MasterProcedureEnv<a name="line.97"></a>
+<span class="sourceLineNo">098</span>   * @param hTableDescriptor the table to operate on<a name="line.98"></a>
+<span class="sourceLineNo">099</span>   * @param snapshot snapshot to clone from<a name="line.99"></a>
+<span class="sourceLineNo">100</span>   * @throws IOException<a name="line.100"></a>
+<span class="sourceLineNo">101</span>   */<a name="line.101"></a>
+<span class="sourceLineNo">102</span>  public CloneSnapshotProcedure(<a name="line.102"></a>
+<span class="sourceLineNo">103</span>      final MasterProcedureEnv env,<a name="line.103"></a>
+<span class="sourceLineNo">104</span>      final HTableDescriptor hTableDescriptor,<a name="line.104"></a>
+<span class="sourceLineNo">105</span>      final SnapshotDescription snapshot)<a name="line.105"></a>
+<span class="sourceLineNo">106</span>      throws IOException {<a name="line.106"></a>
+<span class="sourceLineNo">107</span>    this.hTableDescriptor = hTableDescriptor;<a name="line.107"></a>
+<span class="sourceLineNo">108</span>    this.snapshot = snapshot;<a name="line.108"></a>
+<span class="sourceLineNo">109</span>    this.user = env.getRequestUser().getUGI();<a name="line.109"></a>
+<span class="sourceLineNo">110</span>    this.setOwner(this.user.getShortUserName());<a name="line.110"></a>
+<span class="sourceLineNo">111</span><a name="line.111"></a>
+<span class="sourceLineNo">112</span>    getMonitorStatus();<a name="line.112"></a>
+<span class="sourceLineNo">113</span>  }<a name="line.113"></a>
+<span class="sourceLineNo">114</span><a name="line.114"></a>
+<span class="sourceLineNo">115</span>  /**<a name="line.115"></a>
+<span class="sourceLineNo">116</span>   * Set up monitor status if it is not created.<a name="line.116"></a>
+<span class="sourceLineNo">117</span>   */<a name="line.117"></a>
+<span class="sourceLineNo">118</span>  private MonitoredTask getMonitorStatus() {<a name="line.118"></a>
+<span class="sourceLineNo">119</span>    if (monitorStatus == null) {<a name="line.119"></a>
+<span class="sourceLineNo">120</span>      monitorStatus = TaskMonitor.get().createStatus("Cloning  snapshot '" + snapshot.getName() +<a name="line.120"></a>
+<span class="sourceLineNo">121</span>        "' to table " + getTableName());<a name="line.121"></a>
+<span class="sourceLineNo">122</span>    }<a name="line.122"></a>
+<span class="sourceLineNo">123</span>    return monitorStatus;<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>  @Override<a name="line.126"></a>
+<span class="sourceLineNo">127</span>  protected Flow executeFromState(final MasterProcedureEnv env, final CloneSnapshotState state)<a name="line.127"></a>
+<span class="sourceLineNo">128</span>      throws InterruptedException {<a name="line.128"></a>
+<span class="sourceLineNo">129</span>    if (isTraceEnabled()) {<a name="line.129"></a>
+<span class="sourceLineNo">130</span>      LOG.trace(this + " execute state=" + state);<a name="line.130"></a>
+<span class="sourceLineNo">131</span>    }<a name="line.131"></a>
+<span class="sourceLineNo">132</span>    try {<a name="line.132"></a>
+<span class="sourceLineNo">133</span>      switch (state) {<a name="line.133"></a>
+<span class="sourceLineNo">134</span>        case CLONE_SNAPSHOT_PRE_OPERATION:<a name="line.134"></a>
+<span class="sourceLineNo">135</span>          // Verify if we can clone the table<a name="line.135"></a>
+<span class="sourceLineNo">136</span>          prepareClone(env);<a name="line.136"></a>
+<span class="sourceLineNo">137</span><a name="line.137"></a>
+<span class="sourceLineNo">138</span>          preCloneSnapshot(env);<a name="line.138"></a>
+<span class="sourceLineNo">139</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_WRITE_FS_LAYOUT);<a name="line.139"></a>
+<span class="sourceLineNo">140</span>          break;<a name="line.140"></a>
+<span class="sourceLineNo">141</span>        case CLONE_SNAPSHOT_WRITE_FS_LAYOUT:<a name="line.141"></a>
+<span class="sourceLineNo">142</span>          newRegions = createFilesystemLayout(env, hTableDescriptor, newRegions);<a name="line.142"></a>
+<span class="sourceLineNo">143</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_ADD_TO_META);<a name="line.143"></a>
+<span class="sourceLineNo">144</span>          break;<a name="line.144"></a>
+<span class="sourceLineNo">145</span>        case CLONE_SNAPSHOT_ADD_TO_META:<a name="line.145"></a>
+<span class="sourceLineNo">146</span>          addRegionsToMeta(env);<a name="line.146"></a>
+<span class="sourceLineNo">147</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_ASSIGN_REGIONS);<a name="line.147"></a>
+<span class="sourceLineNo">148</span>          break;<a name="line.148"></a>
+<span class="sourceLineNo">149</span>        case CLONE_SNAPSHOT_ASSIGN_REGIONS:<a name="line.149"></a>
+<span class="sourceLineNo">150</span>          CreateTableProcedure.assignRegions(env, getTableName(), newRegions);<a name="line.150"></a>
+<span class="sourceLineNo">151</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_UPDATE_DESC_CACHE);<a name="line.151"></a>
+<span class="sourceLineNo">152</span>          break;<a name="line.152"></a>
+<span class="sourceLineNo">153</span>        case CLONE_SNAPSHOT_UPDATE_DESC_CACHE:<a name="line.153"></a>
+<span class="sourceLineNo">154</span>          CreateTableProcedure.updateTableDescCache(env, getTableName());<a name="line.154"></a>
+<span class="sourceLineNo">155</span>          setNextState(CloneSnapshotState.CLONE_SNAPSHOT_POST_OPERATION);<a name="line.155"></a>
+<span class="sourceLineNo">156</span>          break;<a name="line.156"></a>
+<span class="sourceLineNo">157</span>        case CLONE_SNAPSHOT_POST_OPERATION:<a name="line.157"></a>
+<span class="sourceLineNo">158</span>          postCloneSnapshot(env);<a name="line.158"></a>
+<span class="sourceLineNo">159</span><a name="line.159"></a>
+<span class="sourceLineNo">160</span>          MetricsSnapshot metricsSnapshot = new MetricsSnapshot();<a name="line.160"></a>
+<span class="sourceLineNo">161</span>          metricsSnapshot.addSnapshotClone(<a name="line.161"></a>
+<span class="sourceLineNo">162</span>            getMonitorStatus().getCompletionTimestamp() - getMonitorStatus().getStartTime());<a name="line.162"></a>
+<span class="sourceLineNo">163</span>          getMonitorStatus().markComplete("Clone snapshot '"+ snapshot.getName() +"' completed!");<a name="line.163"></a>
+<span class="sourceLineNo">164</span>          return Flow.NO_MORE_STATE;<a name="line.164"></a>
+<span class="sourceLineNo">165</span>        default:<a name="line.165"></a>
+<span class="sourceLineNo">166</span>          throw new UnsupportedOperationException("unhandled state=" + state);<a name="line.166"></a>
+<span class="sourceLineNo">167</span>      }<a name="line.167"></a>
+<span class="sourceLineNo">168</span>    } catch (IOException e) {<a name="line.168"></a>
+<span class="sourceLineNo">169</span>      LOG.error("Error trying to create table=" + getTableName() + " state=" + state, e);<a name="line.169"></a>
+<span class="sourceLineNo">170</span>      setFailure("master-create-table", e);<a name="line.170"></a>
+<span class="sourceLineNo">171</span>    }<a name="line.171"></a>
+<span class="sourceLineNo">172</span>    return Flow.HAS_MORE_STATE;<a name="line.172"></a>
+<span class="sourceLineNo">173</span>  }<a name="line.173"></a>
+<span class="sourceLineNo">174</span><a name="line.174"></a>
+<span class="sourceLineNo">175</span>  @Override<a name="line.175"></a>
+<span class="sourceLineNo">176</span>  protected void rollbackState(final MasterProcedureEnv env, final CloneSnapshotState state)<a name="line.176"></a>
+<span class="sourceLineNo">177</span>      throws IOException {<a name="line.177"></a>
+<span class="sourceLineNo">178</span>    if (isTraceEnabled()) {<a name="line.178"></a>
+<span class="sourceLineNo">179</span>      LOG.trace(this + " rollback state=" + state);<a name="line.179"></a>
+<span class="sourceLineNo">180</span>    }<a name="line.180"></a>
+<span class="sourceLineNo">181</span>    try {<a name="line.181"></a>
+<span class="sourceLineNo">182</span>      switch (state) {<a name="line.182"></a>
+<span class="sourceLineNo">183</span>        case CLONE_SNAPSHOT_POST_OPERATION:<a name="line.183"></a>
+<span class="sourceLineNo">184</span>          // TODO-MAYBE: call the deleteTable coprocessor event?<a name="line.184"></a>
+<span class="sourceLineNo">185</span>          break;<a name="line.185"></a>
+<span class="sourceLineNo">186</span>        case CLONE_SNAPSHOT_UPDATE_DESC_CACHE:<a name="line.186"></a>
+<span class="sourceLineNo">187</span>          DeleteTableProcedure.deleteTableDescriptorCache(env, getTableName());<a name="line.187"></a>
+<span class="sourceLineNo">188</span>          break;<a name="line.188"></a>
+<span class="sourceLineNo">189</span>        case CLONE_SNAPSHOT_ASSIGN_REGIONS:<a name="line.189"></a>
+<span class="sourceLineNo">190</span>          DeleteTableProcedure.deleteAssignmentState(env, getTableName());<a name="line.190"></a>
+<span class="sourceLineNo">191</span>          break;<a name="line.191"></a>
+<span class="sourceLineNo">192</span>        case CLONE_SNAPSHOT_ADD_TO_META:<a name="line.192"></a>
+<span class="sourceLineNo">193</span>          DeleteTableProcedure.deleteFromMeta(env, getTableName(), newRegions);<a name="line.193"></a>
+<span class="sourceLineNo">194</span>          break;<a name="line.194"></a>
+<span class="sourceLineNo">195</span>        case CLONE_SNAPSHOT_WRITE_FS_LAYOUT:<a name="line.195"></a>
+<span class="sourceLineNo">196</span>          DeleteTableProcedure.deleteFromFs(env, getTableName(), newRegions, false);<a name="line.196"></a>
+<span class="sourceLineNo">197</span>          break;<a name="line.197"></a>
+<span class="sourceLineNo">198</span>        case CLONE_SNAPSHOT_PRE_OPERATION:<a name="line.198"></a>
+<span class="sourceLineNo">199</span>          DeleteTableProcedure.deleteTableStates(env, getTableName());<a name="line.199"></a>
+<span class="sourceLineNo">200</span>          // TODO-MAYBE: call the deleteTable coprocessor event?<a name="line.200"></a>
+<span class="sourceLineNo">201</span>          break;<a name="line.201"></a>
+<span class="sourceLineNo">202</span>        default:<a name="line.202"></a>
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+<span class="sourceLineNo">204</span>      }<a name="line.204"></a>
+<span class="sourceLineNo">205</span>    } catch (IOException e) {<a name="line.205"></a>
+<span class="sourceLineNo">206</span>      // This will be retried. Unless there is a bug in the code,<a name="line.206"></a>
+<span class="sourceLineNo">207</span>      // this should be just a "temporary error" (e.g. network down)<a name="line.207"></a>
+<span class="sourceLineNo">208</span>      LOG.warn("Failed rollback attempt step=" + state + " table=" + getTableName(), e);<a name="line.208"></a>
+<span class="sourceLineNo">209</span>      throw e;<a name="line.209"></a>
+<span class="sourceLineNo">210</span>    }<a name="line.210"></a>
+<span class="sourceLineNo">211</span>  }<a name="line.211"></a>
+<span class="sourceLineNo">212</span><a name="line.212"></a>
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+<span class="sourceLineNo">216</span>  }<a name="line.216"></a>
+<span class="sourceLineNo">217</span><a name="line.217"></a>
+<span class="sourceLineNo">218</span>  @Override<a name="line.218"></a>
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+<span class="sourceLineNo">222</span><a name="line.222"></a>
+<span class="sourceLineNo">223</span>  @Override<a name="line.223"></a>
+<span class="sourceLineNo">224</span>  protected CloneSnapshotState getInitialState() {<a name="line.224"></a>
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+<span class="sourceLineNo">227</span><a name="line.227"></a>
+<span class="sourceLineNo">228</span>  @Override<a name="line.228"></a>
+<span class="sourceLineNo">229</span>  protected void setNextState(final CloneSnapshotState state) {<a name="line.229"></a>
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+<span class="sourceLineNo">232</span>    } else {<a name="line.232"></a>
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+<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>  @Override<a name="line.237"></a>
+<span class="sourceLineNo">238</span>  public TableName getTableName() {<a name="line.238"></a>
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+<span class="sourceLineNo">241</span><a name="line.241"></a>
+<span class="sourceLineNo">242</span>  @Override<a name="line.242"></a>
+<span class="sourceLineNo">243</span>  public TableOperationType getTableOperationType() {<a name="line.243"></a>
+<span class="sourceLineNo">244</span>    return TableOperationType.CREATE; // Clone is creating a table<a name="line.244"></a>
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+<span class="sourceLineNo">246</span><a name="line.246"></a>
+<span class="sourceLineNo">247</span>  @Override<a name="line.247"></a>
+<span class="sourceLineNo">248</span>  public boolean abort(final MasterProcedureEnv env) {<a name="line.248"></a>
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+<span class="sourceLineNo">428</span><a name="line.428"></a>
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+<span class="sourceLineNo">430</span><a name="line.430"></a>
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+<span class="sourceLineNo">432</span>          // 1. Execute the on-disk Clone<a name="line.432"></a>
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+<span class="sourceLineNo">439</span>          // Clone operation should not have stuff to restore or remove<a name="line.439"></a>
+<span class="sourceLineNo">440</span>          Preconditions.checkArgument(<a name="line.440"></a>
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+<span class="sourceLineNo">442</span>          Preconditions.checkArgument(<a name="line.442"></a>
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+<span class="sourceLineNo">444</span><a name="line.444"></a>
+<span class="sourceLineNo">445</span>          // At this point the clone is complete. Next step is enabling the table

<TRUNCATED>

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