http://git-wip-us.apache.org/repos/asf/hbase-site/blob/293abb17/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.html index 9a4c209..9925f48 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.html @@ -29,780 +29,781 @@ <span class="sourceLineNo">021</span>import java.util.ArrayList;<a name="line.21"></a> <span class="sourceLineNo">022</span>import java.util.Arrays;<a name="line.22"></a> <span class="sourceLineNo">023</span>import java.util.Collection;<a name="line.23"></a> -<span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a> -<span class="sourceLineNo">025</span>import java.util.stream.Stream;<a name="line.25"></a> -<span class="sourceLineNo">026</span>import org.apache.hadoop.conf.Configuration;<a name="line.26"></a> -<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.FileSystem;<a name="line.27"></a> -<span class="sourceLineNo">028</span>import org.apache.hadoop.fs.Path;<a name="line.28"></a> -<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HConstants;<a name="line.29"></a> -<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.MetaMutationAnnotation;<a name="line.30"></a> -<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.ServerName;<a name="line.31"></a> -<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.TableName;<a name="line.32"></a> -<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.UnknownRegionException;<a name="line.33"></a> -<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;<a name="line.34"></a> -<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.DoNotRetryRegionException;<a name="line.35"></a> -<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.MasterSwitchType;<a name="line.36"></a> -<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.client.Mutation;<a name="line.37"></a> -<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.38"></a> -<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.client.RegionInfoBuilder;<a name="line.39"></a> -<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.client.TableDescriptor;<a name="line.40"></a> -<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.exceptions.MergeRegionException;<a name="line.41"></a> -<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.io.hfile.CacheConfig;<a name="line.42"></a> -<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.master.CatalogJanitor;<a name="line.43"></a> -<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.master.MasterCoprocessorHost;<a name="line.44"></a> -<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.master.MasterFileSystem;<a name="line.45"></a> -<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.master.RegionState;<a name="line.46"></a> -<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.master.RegionState.State;<a name="line.47"></a> -<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.master.normalizer.NormalizationPlan;<a name="line.48"></a> -<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure;<a name="line.49"></a> -<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;<a name="line.50"></a> -<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.master.procedure.MasterProcedureUtil;<a name="line.51"></a> -<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.procedure2.ProcedureMetrics;<a name="line.52"></a> -<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;<a name="line.53"></a> -<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.quotas.QuotaExceededException;<a name="line.54"></a> -<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.regionserver.HRegionFileSystem;<a name="line.55"></a> -<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.regionserver.HStoreFile;<a name="line.56"></a> -<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.regionserver.StoreFileInfo;<a name="line.57"></a> -<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.58"></a> -<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.59"></a> -<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.60"></a> -<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.wal.WALSplitter;<a name="line.61"></a> -<span class="sourceLineNo">062</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.62"></a> -<span class="sourceLineNo">063</span>import org.slf4j.Logger;<a name="line.63"></a> -<span class="sourceLineNo">064</span>import org.slf4j.LoggerFactory;<a name="line.64"></a> -<span class="sourceLineNo">065</span><a name="line.65"></a> -<span class="sourceLineNo">066</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.66"></a> -<span class="sourceLineNo">067</span><a name="line.67"></a> -<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.68"></a> -<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoResponse;<a name="line.69"></a> -<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos;<a name="line.70"></a> -<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.MergeTableRegionsState;<a name="line.71"></a> -<span class="sourceLineNo">072</span><a name="line.72"></a> -<span class="sourceLineNo">073</span>/**<a name="line.73"></a> -<span class="sourceLineNo">074</span> * The procedure to Merge a region in a table.<a name="line.74"></a> -<span class="sourceLineNo">075</span> * <p/><a name="line.75"></a> -<span class="sourceLineNo">076</span> * This procedure takes an exclusive table lock since it is working over multiple regions.<a name="line.76"></a> -<span class="sourceLineNo">077</span> * <p/><a name="line.77"></a> -<span class="sourceLineNo">078</span> * It holds the lock for the life of the procedure.<a name="line.78"></a> -<span class="sourceLineNo">079</span> * <p/><a name="line.79"></a> -<span class="sourceLineNo">080</span> * Throws exception on construction if determines context hostile to merge (cluster going down or<a name="line.80"></a> -<span class="sourceLineNo">081</span> * master is shutting down or table is disabled).<a name="line.81"></a> -<span class="sourceLineNo">082</span> */<a name="line.82"></a> -<span class="sourceLineNo">083</span>@InterfaceAudience.Private<a name="line.83"></a> -<span class="sourceLineNo">084</span>public class MergeTableRegionsProcedure<a name="line.84"></a> -<span class="sourceLineNo">085</span> extends AbstractStateMachineTableProcedure<MergeTableRegionsState> {<a name="line.85"></a> -<span class="sourceLineNo">086</span> private static final Logger LOG = LoggerFactory.getLogger(MergeTableRegionsProcedure.class);<a name="line.86"></a> -<span class="sourceLineNo">087</span> private Boolean traceEnabled;<a name="line.87"></a> -<span class="sourceLineNo">088</span> private ServerName regionLocation;<a name="line.88"></a> -<span class="sourceLineNo">089</span> private RegionInfo[] regionsToMerge;<a name="line.89"></a> -<span class="sourceLineNo">090</span> private RegionInfo mergedRegion;<a name="line.90"></a> -<span class="sourceLineNo">091</span> private boolean forcible;<a name="line.91"></a> -<span class="sourceLineNo">092</span><a name="line.92"></a> -<span class="sourceLineNo">093</span> public MergeTableRegionsProcedure() {<a name="line.93"></a> -<span class="sourceLineNo">094</span> // Required by the Procedure framework to create the procedure on replay<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> public MergeTableRegionsProcedure(final MasterProcedureEnv env,<a name="line.97"></a> -<span class="sourceLineNo">098</span> final RegionInfo regionToMergeA, final RegionInfo regionToMergeB) throws IOException {<a name="line.98"></a> -<span class="sourceLineNo">099</span> this(env, regionToMergeA, regionToMergeB, false);<a name="line.99"></a> -<span class="sourceLineNo">100</span> }<a name="line.100"></a> -<span class="sourceLineNo">101</span><a name="line.101"></a> -<span class="sourceLineNo">102</span> public MergeTableRegionsProcedure(final MasterProcedureEnv env,<a name="line.102"></a> -<span class="sourceLineNo">103</span> final RegionInfo regionToMergeA, final RegionInfo regionToMergeB,<a name="line.103"></a> -<span class="sourceLineNo">104</span> final boolean forcible) throws IOException {<a name="line.104"></a> -<span class="sourceLineNo">105</span> this(env, new RegionInfo[] {regionToMergeA, regionToMergeB}, forcible);<a name="line.105"></a> -<span class="sourceLineNo">106</span> }<a name="line.106"></a> -<span class="sourceLineNo">107</span><a name="line.107"></a> -<span class="sourceLineNo">108</span> public MergeTableRegionsProcedure(final MasterProcedureEnv env,<a name="line.108"></a> -<span class="sourceLineNo">109</span> final RegionInfo[] regionsToMerge, final boolean forcible)<a name="line.109"></a> -<span class="sourceLineNo">110</span> throws IOException {<a name="line.110"></a> -<span class="sourceLineNo">111</span> super(env);<a name="line.111"></a> -<span class="sourceLineNo">112</span><a name="line.112"></a> -<span class="sourceLineNo">113</span> // Check daughter regions and make sure that we have valid daughter regions<a name="line.113"></a> -<span class="sourceLineNo">114</span> // before doing the real work. This check calls the super method #checkOnline also.<a name="line.114"></a> -<span class="sourceLineNo">115</span> checkRegionsToMerge(env, regionsToMerge, forcible);<a name="line.115"></a> -<span class="sourceLineNo">116</span><a name="line.116"></a> -<span class="sourceLineNo">117</span> // WARN: make sure there is no parent region of the two merging regions in<a name="line.117"></a> -<span class="sourceLineNo">118</span> // hbase:meta If exists, fixing up daughters would cause daughter regions(we<a name="line.118"></a> -<span class="sourceLineNo">119</span> // have merged one) online again when we restart master, so we should clear<a name="line.119"></a> -<span class="sourceLineNo">120</span> // the parent region to prevent the above case<a name="line.120"></a> -<span class="sourceLineNo">121</span> // Since HBASE-7721, we don't need fix up daughters any more. so here do nothing<a name="line.121"></a> -<span class="sourceLineNo">122</span> this.regionsToMerge = regionsToMerge;<a name="line.122"></a> -<span class="sourceLineNo">123</span> this.mergedRegion = createMergedRegionInfo(regionsToMerge);<a name="line.123"></a> -<span class="sourceLineNo">124</span> preflightChecks(env, true);<a name="line.124"></a> -<span class="sourceLineNo">125</span> this.forcible = forcible;<a name="line.125"></a> -<span class="sourceLineNo">126</span> }<a name="line.126"></a> -<span class="sourceLineNo">127</span><a name="line.127"></a> -<span class="sourceLineNo">128</span> private static void checkRegionsToMerge(MasterProcedureEnv env, final RegionInfo[] regionsToMerge,<a name="line.128"></a> -<span class="sourceLineNo">129</span> final boolean forcible) throws MergeRegionException {<a name="line.129"></a> -<span class="sourceLineNo">130</span> // For now, we only merge 2 regions.<a name="line.130"></a> -<span class="sourceLineNo">131</span> // It could be extended to more than 2 regions in the future.<a name="line.131"></a> -<span class="sourceLineNo">132</span> if (regionsToMerge == null || regionsToMerge.length != 2) {<a name="line.132"></a> -<span class="sourceLineNo">133</span> throw new MergeRegionException("Expected to merge 2 regions, got: " +<a name="line.133"></a> -<span class="sourceLineNo">134</span> Arrays.toString(regionsToMerge));<a name="line.134"></a> -<span class="sourceLineNo">135</span> }<a name="line.135"></a> -<span class="sourceLineNo">136</span><a name="line.136"></a> -<span class="sourceLineNo">137</span> checkRegionsToMerge(env, regionsToMerge[0], regionsToMerge[1], forcible);<a name="line.137"></a> -<span class="sourceLineNo">138</span> }<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> * One time checks.<a name="line.141"></a> -<span class="sourceLineNo">142</span> */<a name="line.142"></a> -<span class="sourceLineNo">143</span> private static void checkRegionsToMerge(MasterProcedureEnv env, final RegionInfo regionToMergeA,<a name="line.143"></a> -<span class="sourceLineNo">144</span> final RegionInfo regionToMergeB, final boolean forcible) throws MergeRegionException {<a name="line.144"></a> -<span class="sourceLineNo">145</span> if (!regionToMergeA.getTable().equals(regionToMergeB.getTable())) {<a name="line.145"></a> -<span class="sourceLineNo">146</span> throw new MergeRegionException("Can't merge regions from two different tables: " +<a name="line.146"></a> -<span class="sourceLineNo">147</span> regionToMergeA + ", " + regionToMergeB);<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> if (regionToMergeA.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID ||<a name="line.150"></a> -<span class="sourceLineNo">151</span> regionToMergeB.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) {<a name="line.151"></a> -<span class="sourceLineNo">152</span> throw new MergeRegionException("Can't merge non-default replicas");<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> try {<a name="line.155"></a> -<span class="sourceLineNo">156</span> checkOnline(env, regionToMergeA);<a name="line.156"></a> -<span class="sourceLineNo">157</span> checkOnline(env, regionToMergeB);<a name="line.157"></a> -<span class="sourceLineNo">158</span> } catch (DoNotRetryRegionException dnrre) {<a name="line.158"></a> -<span class="sourceLineNo">159</span> throw new MergeRegionException(dnrre);<a name="line.159"></a> -<span class="sourceLineNo">160</span> }<a name="line.160"></a> -<span class="sourceLineNo">161</span><a name="line.161"></a> -<span class="sourceLineNo">162</span> if (!RegionInfo.areAdjacent(regionToMergeA, regionToMergeB)) {<a name="line.162"></a> -<span class="sourceLineNo">163</span> String msg = "Unable to merge non-adjacent regions " + regionToMergeA.getShortNameToLog() +<a name="line.163"></a> -<span class="sourceLineNo">164</span> ", " + regionToMergeB.getShortNameToLog() + " where forcible = " + forcible;<a name="line.164"></a> -<span class="sourceLineNo">165</span> LOG.warn(msg);<a name="line.165"></a> -<span class="sourceLineNo">166</span> if (!forcible) {<a name="line.166"></a> -<span class="sourceLineNo">167</span> throw new MergeRegionException(msg);<a name="line.167"></a> -<span class="sourceLineNo">168</span> }<a name="line.168"></a> -<span class="sourceLineNo">169</span> }<a name="line.169"></a> -<span class="sourceLineNo">170</span> }<a name="line.170"></a> -<span class="sourceLineNo">171</span><a name="line.171"></a> +<span class="sourceLineNo">024</span>import java.util.Collections;<a name="line.24"></a> +<span class="sourceLineNo">025</span>import java.util.List;<a name="line.25"></a> +<span class="sourceLineNo">026</span>import java.util.stream.Stream;<a name="line.26"></a> +<span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configuration;<a name="line.27"></a> +<span class="sourceLineNo">028</span>import org.apache.hadoop.fs.FileSystem;<a name="line.28"></a> +<span class="sourceLineNo">029</span>import org.apache.hadoop.fs.Path;<a name="line.29"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HConstants;<a name="line.30"></a> +<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.MetaMutationAnnotation;<a name="line.31"></a> +<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.ServerName;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.TableName;<a name="line.33"></a> +<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.UnknownRegionException;<a name="line.34"></a> +<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;<a name="line.35"></a> +<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.DoNotRetryRegionException;<a name="line.36"></a> +<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.client.MasterSwitchType;<a name="line.37"></a> +<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.client.Mutation;<a name="line.38"></a> +<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.39"></a> +<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.client.RegionInfoBuilder;<a name="line.40"></a> +<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.client.TableDescriptor;<a name="line.41"></a> +<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.exceptions.MergeRegionException;<a name="line.42"></a> +<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.io.hfile.CacheConfig;<a name="line.43"></a> +<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.master.CatalogJanitor;<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.RegionState;<a name="line.47"></a> +<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.master.RegionState.State;<a name="line.48"></a> +<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.master.normalizer.NormalizationPlan;<a name="line.49"></a> +<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure;<a name="line.50"></a> +<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;<a name="line.51"></a> +<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.master.procedure.MasterProcedureUtil;<a name="line.52"></a> +<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.procedure2.ProcedureMetrics;<a name="line.53"></a> +<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;<a name="line.54"></a> +<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.quotas.QuotaExceededException;<a name="line.55"></a> +<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.regionserver.HRegionFileSystem;<a name="line.56"></a> +<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.regionserver.HStoreFile;<a name="line.57"></a> +<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.regionserver.StoreFileInfo;<a name="line.58"></a> +<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.59"></a> +<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.60"></a> +<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.61"></a> +<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.wal.WALSplitter;<a name="line.62"></a> +<span class="sourceLineNo">063</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.63"></a> +<span class="sourceLineNo">064</span>import org.slf4j.Logger;<a name="line.64"></a> +<span class="sourceLineNo">065</span>import org.slf4j.LoggerFactory;<a name="line.65"></a> +<span class="sourceLineNo">066</span><a name="line.66"></a> +<span class="sourceLineNo">067</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.67"></a> +<span class="sourceLineNo">068</span><a name="line.68"></a> +<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.69"></a> +<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoResponse;<a name="line.70"></a> +<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos;<a name="line.71"></a> +<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.MergeTableRegionsState;<a name="line.72"></a> +<span class="sourceLineNo">073</span><a name="line.73"></a> +<span class="sourceLineNo">074</span>/**<a name="line.74"></a> +<span class="sourceLineNo">075</span> * The procedure to Merge a region in a table.<a name="line.75"></a> +<span class="sourceLineNo">076</span> * <p/><a name="line.76"></a> +<span class="sourceLineNo">077</span> * This procedure takes an exclusive table lock since it is working over multiple regions.<a name="line.77"></a> +<span class="sourceLineNo">078</span> * <p/><a name="line.78"></a> +<span class="sourceLineNo">079</span> * It holds the lock for the life of the procedure.<a name="line.79"></a> +<span class="sourceLineNo">080</span> * <p/><a name="line.80"></a> +<span class="sourceLineNo">081</span> * Throws exception on construction if determines context hostile to merge (cluster going down or<a name="line.81"></a> +<span class="sourceLineNo">082</span> * master is shutting down or table is disabled).<a name="line.82"></a> +<span class="sourceLineNo">083</span> */<a name="line.83"></a> +<span class="sourceLineNo">084</span>@InterfaceAudience.Private<a name="line.84"></a> +<span class="sourceLineNo">085</span>public class MergeTableRegionsProcedure<a name="line.85"></a> +<span class="sourceLineNo">086</span> extends AbstractStateMachineTableProcedure<MergeTableRegionsState> {<a name="line.86"></a> +<span class="sourceLineNo">087</span> private static final Logger LOG = LoggerFactory.getLogger(MergeTableRegionsProcedure.class);<a name="line.87"></a> +<span class="sourceLineNo">088</span> private Boolean traceEnabled;<a name="line.88"></a> +<span class="sourceLineNo">089</span> private ServerName regionLocation;<a name="line.89"></a> +<span class="sourceLineNo">090</span> private RegionInfo[] regionsToMerge;<a name="line.90"></a> +<span class="sourceLineNo">091</span> private RegionInfo mergedRegion;<a name="line.91"></a> +<span class="sourceLineNo">092</span> private boolean forcible;<a name="line.92"></a> +<span class="sourceLineNo">093</span><a name="line.93"></a> +<span class="sourceLineNo">094</span> public MergeTableRegionsProcedure() {<a name="line.94"></a> +<span class="sourceLineNo">095</span> // Required by the Procedure framework to create the procedure on replay<a name="line.95"></a> +<span class="sourceLineNo">096</span> }<a name="line.96"></a> +<span class="sourceLineNo">097</span><a name="line.97"></a> +<span class="sourceLineNo">098</span> public MergeTableRegionsProcedure(final MasterProcedureEnv env,<a name="line.98"></a> +<span class="sourceLineNo">099</span> final RegionInfo regionToMergeA, final RegionInfo regionToMergeB) throws IOException {<a name="line.99"></a> +<span class="sourceLineNo">100</span> this(env, regionToMergeA, regionToMergeB, false);<a name="line.100"></a> +<span class="sourceLineNo">101</span> }<a name="line.101"></a> +<span class="sourceLineNo">102</span><a name="line.102"></a> +<span class="sourceLineNo">103</span> public MergeTableRegionsProcedure(final MasterProcedureEnv env,<a name="line.103"></a> +<span class="sourceLineNo">104</span> final RegionInfo regionToMergeA, final RegionInfo regionToMergeB,<a name="line.104"></a> +<span class="sourceLineNo">105</span> final boolean forcible) throws IOException {<a name="line.105"></a> +<span class="sourceLineNo">106</span> this(env, new RegionInfo[] {regionToMergeA, regionToMergeB}, forcible);<a name="line.106"></a> +<span class="sourceLineNo">107</span> }<a name="line.107"></a> +<span class="sourceLineNo">108</span><a name="line.108"></a> +<span class="sourceLineNo">109</span> public MergeTableRegionsProcedure(final MasterProcedureEnv env,<a name="line.109"></a> +<span class="sourceLineNo">110</span> final RegionInfo[] regionsToMerge, final boolean forcible)<a name="line.110"></a> +<span class="sourceLineNo">111</span> throws IOException {<a name="line.111"></a> +<span class="sourceLineNo">112</span> super(env);<a name="line.112"></a> +<span class="sourceLineNo">113</span><a name="line.113"></a> +<span class="sourceLineNo">114</span> // Check daughter regions and make sure that we have valid daughter regions<a name="line.114"></a> +<span class="sourceLineNo">115</span> // before doing the real work. This check calls the super method #checkOnline also.<a name="line.115"></a> +<span class="sourceLineNo">116</span> checkRegionsToMerge(env, regionsToMerge, forcible);<a name="line.116"></a> +<span class="sourceLineNo">117</span><a name="line.117"></a> +<span class="sourceLineNo">118</span> // WARN: make sure there is no parent region of the two merging regions in<a name="line.118"></a> +<span class="sourceLineNo">119</span> // hbase:meta If exists, fixing up daughters would cause daughter regions(we<a name="line.119"></a> +<span class="sourceLineNo">120</span> // have merged one) online again when we restart master, so we should clear<a name="line.120"></a> +<span class="sourceLineNo">121</span> // the parent region to prevent the above case<a name="line.121"></a> +<span class="sourceLineNo">122</span> // Since HBASE-7721, we don't need fix up daughters any more. so here do nothing<a name="line.122"></a> +<span class="sourceLineNo">123</span> this.regionsToMerge = regionsToMerge;<a name="line.123"></a> +<span class="sourceLineNo">124</span> this.mergedRegion = createMergedRegionInfo(regionsToMerge);<a name="line.124"></a> +<span class="sourceLineNo">125</span> preflightChecks(env, true);<a name="line.125"></a> +<span class="sourceLineNo">126</span> this.forcible = forcible;<a name="line.126"></a> +<span class="sourceLineNo">127</span> }<a name="line.127"></a> +<span class="sourceLineNo">128</span><a name="line.128"></a> +<span class="sourceLineNo">129</span> private static void checkRegionsToMerge(MasterProcedureEnv env, final RegionInfo[] regionsToMerge,<a name="line.129"></a> +<span class="sourceLineNo">130</span> final boolean forcible) throws MergeRegionException {<a name="line.130"></a> +<span class="sourceLineNo">131</span> // For now, we only merge 2 regions.<a name="line.131"></a> +<span class="sourceLineNo">132</span> // It could be extended to more than 2 regions in the future.<a name="line.132"></a> +<span class="sourceLineNo">133</span> if (regionsToMerge == null || regionsToMerge.length != 2) {<a name="line.133"></a> +<span class="sourceLineNo">134</span> throw new MergeRegionException("Expected to merge 2 regions, got: " +<a name="line.134"></a> +<span class="sourceLineNo">135</span> Arrays.toString(regionsToMerge));<a name="line.135"></a> +<span class="sourceLineNo">136</span> }<a name="line.136"></a> +<span class="sourceLineNo">137</span><a name="line.137"></a> +<span class="sourceLineNo">138</span> checkRegionsToMerge(env, regionsToMerge[0], regionsToMerge[1], forcible);<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> * One time checks.<a name="line.142"></a> +<span class="sourceLineNo">143</span> */<a name="line.143"></a> +<span class="sourceLineNo">144</span> private static void checkRegionsToMerge(MasterProcedureEnv env, final RegionInfo regionToMergeA,<a name="line.144"></a> +<span class="sourceLineNo">145</span> final RegionInfo regionToMergeB, final boolean forcible) throws MergeRegionException {<a name="line.145"></a> +<span class="sourceLineNo">146</span> if (!regionToMergeA.getTable().equals(regionToMergeB.getTable())) {<a name="line.146"></a> +<span class="sourceLineNo">147</span> throw new MergeRegionException("Can't merge regions from two different tables: " +<a name="line.147"></a> +<span class="sourceLineNo">148</span> regionToMergeA + ", " + regionToMergeB);<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> if (regionToMergeA.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID ||<a name="line.151"></a> +<span class="sourceLineNo">152</span> regionToMergeB.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) {<a name="line.152"></a> +<span class="sourceLineNo">153</span> throw new MergeRegionException("Can't merge non-default replicas");<a name="line.153"></a> +<span class="sourceLineNo">154</span> }<a name="line.154"></a> +<span class="sourceLineNo">155</span><a name="line.155"></a> +<span class="sourceLineNo">156</span> try {<a name="line.156"></a> +<span class="sourceLineNo">157</span> checkOnline(env, regionToMergeA);<a name="line.157"></a> +<span class="sourceLineNo">158</span> checkOnline(env, regionToMergeB);<a name="line.158"></a> +<span class="sourceLineNo">159</span> } catch (DoNotRetryRegionException dnrre) {<a name="line.159"></a> +<span class="sourceLineNo">160</span> throw new MergeRegionException(dnrre);<a name="line.160"></a> +<span class="sourceLineNo">161</span> }<a name="line.161"></a> +<span class="sourceLineNo">162</span><a name="line.162"></a> +<span class="sourceLineNo">163</span> if (!RegionInfo.areAdjacent(regionToMergeA, regionToMergeB)) {<a name="line.163"></a> +<span class="sourceLineNo">164</span> String msg = "Unable to merge non-adjacent regions " + regionToMergeA.getShortNameToLog() +<a name="line.164"></a> +<span class="sourceLineNo">165</span> ", " + regionToMergeB.getShortNameToLog() + " where forcible = " + forcible;<a name="line.165"></a> +<span class="sourceLineNo">166</span> LOG.warn(msg);<a name="line.166"></a> +<span class="sourceLineNo">167</span> if (!forcible) {<a name="line.167"></a> +<span class="sourceLineNo">168</span> throw new MergeRegionException(msg);<a name="line.168"></a> +<span class="sourceLineNo">169</span> }<a name="line.169"></a> +<span class="sourceLineNo">170</span> }<a name="line.170"></a> +<span class="sourceLineNo">171</span> }<a name="line.171"></a> <span class="sourceLineNo">172</span><a name="line.172"></a> -<span class="sourceLineNo">173</span> private static RegionInfo createMergedRegionInfo(final RegionInfo[] regionsToMerge) {<a name="line.173"></a> -<span class="sourceLineNo">174</span> return createMergedRegionInfo(regionsToMerge[0], regionsToMerge[1]);<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> /**<a name="line.177"></a> -<span class="sourceLineNo">178</span> * Create merged region info through the specified two regions<a name="line.178"></a> -<span class="sourceLineNo">179</span> */<a name="line.179"></a> -<span class="sourceLineNo">180</span> private static RegionInfo createMergedRegionInfo(final RegionInfo regionToMergeA,<a name="line.180"></a> -<span class="sourceLineNo">181</span> final RegionInfo regionToMergeB) {<a name="line.181"></a> -<span class="sourceLineNo">182</span> // Choose the smaller as start key<a name="line.182"></a> -<span class="sourceLineNo">183</span> final byte[] startKey;<a name="line.183"></a> -<span class="sourceLineNo">184</span> if (RegionInfo.COMPARATOR.compare(regionToMergeA, regionToMergeB) <= 0) {<a name="line.184"></a> -<span class="sourceLineNo">185</span> startKey = regionToMergeA.getStartKey();<a name="line.185"></a> -<span class="sourceLineNo">186</span> } else {<a name="line.186"></a> -<span class="sourceLineNo">187</span> startKey = regionToMergeB.getStartKey();<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> // Choose the bigger as end key<a name="line.190"></a> -<span class="sourceLineNo">191</span> final byte[] endKey;<a name="line.191"></a> -<span class="sourceLineNo">192</span> if (Bytes.equals(regionToMergeA.getEndKey(), HConstants.EMPTY_BYTE_ARRAY)<a name="line.192"></a> -<span class="sourceLineNo">193</span> || (!Bytes.equals(regionToMergeB.getEndKey(), HConstants.EMPTY_BYTE_ARRAY)<a name="line.193"></a> -<span class="sourceLineNo">194</span> && Bytes.compareTo(regionToMergeA.getEndKey(), regionToMergeB.getEndKey()) > 0)) {<a name="line.194"></a> -<span class="sourceLineNo">195</span> endKey = regionToMergeA.getEndKey();<a name="line.195"></a> -<span class="sourceLineNo">196</span> } else {<a name="line.196"></a> -<span class="sourceLineNo">197</span> endKey = regionToMergeB.getEndKey();<a name="line.197"></a> -<span class="sourceLineNo">198</span> }<a name="line.198"></a> -<span class="sourceLineNo">199</span><a name="line.199"></a> -<span class="sourceLineNo">200</span> // Merged region is sorted between two merging regions in META<a name="line.200"></a> -<span class="sourceLineNo">201</span> return RegionInfoBuilder.newBuilder(regionToMergeA.getTable())<a name="line.201"></a> -<span class="sourceLineNo">202</span> .setStartKey(startKey)<a name="line.202"></a> -<span class="sourceLineNo">203</span> .setEndKey(endKey)<a name="line.203"></a> -<span class="sourceLineNo">204</span> .setSplit(false)<a name="line.204"></a> -<span class="sourceLineNo">205</span> .setRegionId(getMergedRegionIdTimestamp(regionToMergeA, regionToMergeB))<a name="line.205"></a> -<span class="sourceLineNo">206</span> .build();<a name="line.206"></a> -<span class="sourceLineNo">207</span> }<a name="line.207"></a> -<span class="sourceLineNo">208</span><a name="line.208"></a> -<span class="sourceLineNo">209</span> private static long getMergedRegionIdTimestamp(final RegionInfo regionToMergeA,<a name="line.209"></a> -<span class="sourceLineNo">210</span> final RegionInfo regionToMergeB) {<a name="line.210"></a> -<span class="sourceLineNo">211</span> long rid = EnvironmentEdgeManager.currentTime();<a name="line.211"></a> -<span class="sourceLineNo">212</span> // Region Id is a timestamp. Merged region's id can't be less than that of<a name="line.212"></a> -<span class="sourceLineNo">213</span> // merging regions else will insert at wrong location in hbase:meta (See HBASE-710).<a name="line.213"></a> -<span class="sourceLineNo">214</span> if (rid < regionToMergeA.getRegionId() || rid < regionToMergeB.getRegionId()) {<a name="line.214"></a> -<span class="sourceLineNo">215</span> LOG.warn("Clock skew; merging regions id are " + regionToMergeA.getRegionId()<a name="line.215"></a> -<span class="sourceLineNo">216</span> + " and " + regionToMergeB.getRegionId() + ", but current time here is " + rid);<a name="line.216"></a> -<span class="sourceLineNo">217</span> rid = Math.max(regionToMergeA.getRegionId(), regionToMergeB.getRegionId()) + 1;<a name="line.217"></a> -<span class="sourceLineNo">218</span> }<a name="line.218"></a> -<span class="sourceLineNo">219</span> return rid;<a name="line.219"></a> -<span class="sourceLineNo">220</span> }<a name="line.220"></a> -<span class="sourceLineNo">221</span><a name="line.221"></a> +<span class="sourceLineNo">173</span><a name="line.173"></a> +<span class="sourceLineNo">174</span> private static RegionInfo createMergedRegionInfo(final RegionInfo[] regionsToMerge) {<a name="line.174"></a> +<span class="sourceLineNo">175</span> return createMergedRegionInfo(regionsToMerge[0], regionsToMerge[1]);<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> /**<a name="line.178"></a> +<span class="sourceLineNo">179</span> * Create merged region info through the specified two regions<a name="line.179"></a> +<span class="sourceLineNo">180</span> */<a name="line.180"></a> +<span class="sourceLineNo">181</span> private static RegionInfo createMergedRegionInfo(final RegionInfo regionToMergeA,<a name="line.181"></a> +<span class="sourceLineNo">182</span> final RegionInfo regionToMergeB) {<a name="line.182"></a> +<span class="sourceLineNo">183</span> // Choose the smaller as start key<a name="line.183"></a> +<span class="sourceLineNo">184</span> final byte[] startKey;<a name="line.184"></a> +<span class="sourceLineNo">185</span> if (RegionInfo.COMPARATOR.compare(regionToMergeA, regionToMergeB) <= 0) {<a name="line.185"></a> +<span class="sourceLineNo">186</span> startKey = regionToMergeA.getStartKey();<a name="line.186"></a> +<span class="sourceLineNo">187</span> } else {<a name="line.187"></a> +<span class="sourceLineNo">188</span> startKey = regionToMergeB.getStartKey();<a name="line.188"></a> +<span class="sourceLineNo">189</span> }<a name="line.189"></a> +<span class="sourceLineNo">190</span><a name="line.190"></a> +<span class="sourceLineNo">191</span> // Choose the bigger as end key<a name="line.191"></a> +<span class="sourceLineNo">192</span> final byte[] endKey;<a name="line.192"></a> +<span class="sourceLineNo">193</span> if (Bytes.equals(regionToMergeA.getEndKey(), HConstants.EMPTY_BYTE_ARRAY)<a name="line.193"></a> +<span class="sourceLineNo">194</span> || (!Bytes.equals(regionToMergeB.getEndKey(), HConstants.EMPTY_BYTE_ARRAY)<a name="line.194"></a> +<span class="sourceLineNo">195</span> && Bytes.compareTo(regionToMergeA.getEndKey(), regionToMergeB.getEndKey()) > 0)) {<a name="line.195"></a> +<span class="sourceLineNo">196</span> endKey = regionToMergeA.getEndKey();<a name="line.196"></a> +<span class="sourceLineNo">197</span> } else {<a name="line.197"></a> +<span class="sourceLineNo">198</span> endKey = regionToMergeB.getEndKey();<a name="line.198"></a> +<span class="sourceLineNo">199</span> }<a name="line.199"></a> +<span class="sourceLineNo">200</span><a name="line.200"></a> +<span class="sourceLineNo">201</span> // Merged region is sorted between two merging regions in META<a name="line.201"></a> +<span class="sourceLineNo">202</span> return RegionInfoBuilder.newBuilder(regionToMergeA.getTable())<a name="line.202"></a> +<span class="sourceLineNo">203</span> .setStartKey(startKey)<a name="line.203"></a> +<span class="sourceLineNo">204</span> .setEndKey(endKey)<a name="line.204"></a> +<span class="sourceLineNo">205</span> .setSplit(false)<a name="line.205"></a> +<span class="sourceLineNo">206</span> .setRegionId(getMergedRegionIdTimestamp(regionToMergeA, regionToMergeB))<a name="line.206"></a> +<span class="sourceLineNo">207</span> .build();<a name="line.207"></a> +<span class="sourceLineNo">208</span> }<a name="line.208"></a> +<span class="sourceLineNo">209</span><a name="line.209"></a> +<span class="sourceLineNo">210</span> private static long getMergedRegionIdTimestamp(final RegionInfo regionToMergeA,<a name="line.210"></a> +<span class="sourceLineNo">211</span> final RegionInfo regionToMergeB) {<a name="line.211"></a> +<span class="sourceLineNo">212</span> long rid = EnvironmentEdgeManager.currentTime();<a name="line.212"></a> +<span class="sourceLineNo">213</span> // Region Id is a timestamp. Merged region's id can't be less than that of<a name="line.213"></a> +<span class="sourceLineNo">214</span> // merging regions else will insert at wrong location in hbase:meta (See HBASE-710).<a name="line.214"></a> +<span class="sourceLineNo">215</span> if (rid < regionToMergeA.getRegionId() || rid < regionToMergeB.getRegionId()) {<a name="line.215"></a> +<span class="sourceLineNo">216</span> LOG.warn("Clock skew; merging regions id are " + regionToMergeA.getRegionId()<a name="line.216"></a> +<span class="sourceLineNo">217</span> + " and " + regionToMergeB.getRegionId() + ", but current time here is " + rid);<a name="line.217"></a> +<span class="sourceLineNo">218</span> rid = Math.max(regionToMergeA.getRegionId(), regionToMergeB.getRegionId()) + 1;<a name="line.218"></a> +<span class="sourceLineNo">219</span> }<a name="line.219"></a> +<span class="sourceLineNo">220</span> return rid;<a name="line.220"></a> +<span class="sourceLineNo">221</span> }<a name="line.221"></a> <span class="sourceLineNo">222</span><a name="line.222"></a> -<span class="sourceLineNo">223</span> private void removeNonDefaultReplicas(MasterProcedureEnv env) throws IOException {<a name="line.223"></a> -<span class="sourceLineNo">224</span> AssignmentManagerUtil.removeNonDefaultReplicas(env, Stream.of(regionsToMerge),<a name="line.224"></a> -<span class="sourceLineNo">225</span> getRegionReplication(env));<a name="line.225"></a> -<span class="sourceLineNo">226</span> }<a name="line.226"></a> -<span class="sourceLineNo">227</span><a name="line.227"></a> -<span class="sourceLineNo">228</span> private void checkClosedRegions(MasterProcedureEnv env) throws IOException {<a name="line.228"></a> -<span class="sourceLineNo">229</span> // theoretically this should not happen any more after we use TRSP, but anyway let's add a check<a name="line.229"></a> -<span class="sourceLineNo">230</span> // here<a name="line.230"></a> -<span class="sourceLineNo">231</span> for (RegionInfo region : regionsToMerge) {<a name="line.231"></a> -<span class="sourceLineNo">232</span> AssignmentManagerUtil.checkClosedRegion(env, region);<a name="line.232"></a> -<span class="sourceLineNo">233</span> }<a name="line.233"></a> -<span class="sourceLineNo">234</span> }<a name="line.234"></a> -<span class="sourceLineNo">235</span><a name="line.235"></a> -<span class="sourceLineNo">236</span> @Override<a name="line.236"></a> -<span class="sourceLineNo">237</span> protected Flow executeFromState(final MasterProcedureEnv env,<a name="line.237"></a> -<span class="sourceLineNo">238</span> MergeTableRegionsState state) {<a name="line.238"></a> -<span class="sourceLineNo">239</span> LOG.trace("{} execute state={}", this, state);<a name="line.239"></a> -<span class="sourceLineNo">240</span> try {<a name="line.240"></a> -<span class="sourceLineNo">241</span> switch (state) {<a name="line.241"></a> -<span class="sourceLineNo">242</span> case MERGE_TABLE_REGIONS_PREPARE:<a name="line.242"></a> -<span class="sourceLineNo">243</span> if (!prepareMergeRegion(env)) {<a name="line.243"></a> -<span class="sourceLineNo">244</span> assert isFailed() : "Merge region should have an exception here";<a name="line.244"></a> -<span class="sourceLineNo">245</span> return Flow.NO_MORE_STATE;<a name="line.245"></a> -<span class="sourceLineNo">246</span> }<a name="line.246"></a> -<span class="sourceLineNo">247</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_PRE_MERGE_OPERATION);<a name="line.247"></a> -<span class="sourceLineNo">248</span> break;<a name="line.248"></a> -<span class="sourceLineNo">249</span> case MERGE_TABLE_REGIONS_PRE_MERGE_OPERATION:<a name="line.249"></a> -<span class="sourceLineNo">250</span> preMergeRegions(env);<a name="line.250"></a> -<span class="sourceLineNo">251</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_CLOSE_REGIONS);<a name="line.251"></a> -<span class="sourceLineNo">252</span> break;<a name="line.252"></a> -<span class="sourceLineNo">253</span> case MERGE_TABLE_REGIONS_CLOSE_REGIONS:<a name="line.253"></a> -<span class="sourceLineNo">254</span> addChildProcedure(createUnassignProcedures(env));<a name="line.254"></a> -<span class="sourceLineNo">255</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_CHECK_CLOSED_REGIONS);<a name="line.255"></a> -<span class="sourceLineNo">256</span> break;<a name="line.256"></a> -<span class="sourceLineNo">257</span> case MERGE_TABLE_REGIONS_CHECK_CLOSED_REGIONS:<a name="line.257"></a> -<span class="sourceLineNo">258</span> checkClosedRegions(env);<a name="line.258"></a> -<span class="sourceLineNo">259</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_CREATE_MERGED_REGION);<a name="line.259"></a> -<span class="sourceLineNo">260</span> break;<a name="line.260"></a> -<span class="sourceLineNo">261</span> case MERGE_TABLE_REGIONS_CREATE_MERGED_REGION:<a name="line.261"></a> -<span class="sourceLineNo">262</span> removeNonDefaultReplicas(env);<a name="line.262"></a> -<span class="sourceLineNo">263</span> createMergedRegion(env);<a name="line.263"></a> -<span class="sourceLineNo">264</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_WRITE_MAX_SEQUENCE_ID_FILE);<a name="line.264"></a> -<span class="sourceLineNo">265</span> break;<a name="line.265"></a> -<span class="sourceLineNo">266</span> case MERGE_TABLE_REGIONS_WRITE_MAX_SEQUENCE_ID_FILE:<a name="line.266"></a> -<span class="sourceLineNo">267</span> writeMaxSequenceIdFile(env);<a name="line.267"></a> -<span class="sourceLineNo">268</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_PRE_MERGE_COMMIT_OPERATION);<a name="line.268"></a> -<span class="sourceLineNo">269</span> break;<a name="line.269"></a> -<span class="sourceLineNo">270</span> case MERGE_TABLE_REGIONS_PRE_MERGE_COMMIT_OPERATION:<a name="line.270"></a> -<span class="sourceLineNo">271</span> preMergeRegionsCommit(env);<a name="line.271"></a> -<span class="sourceLineNo">272</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_UPDATE_META);<a name="line.272"></a> -<span class="sourceLineNo">273</span> break;<a name="line.273"></a> -<span class="sourceLineNo">274</span> case MERGE_TABLE_REGIONS_UPDATE_META:<a name="line.274"></a> -<span class="sourceLineNo">275</span> updateMetaForMergedRegions(env);<a name="line.275"></a> -<span class="sourceLineNo">276</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_POST_MERGE_COMMIT_OPERATION);<a name="line.276"></a> -<span class="sourceLineNo">277</span> break;<a name="line.277"></a> -<span class="sourceLineNo">278</span> case MERGE_TABLE_REGIONS_POST_MERGE_COMMIT_OPERATION:<a name="line.278"></a> -<span class="sourceLineNo">279</span> postMergeRegionsCommit(env);<a name="line.279"></a> -<span class="sourceLineNo">280</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_OPEN_MERGED_REGION);<a name="line.280"></a> -<span class="sourceLineNo">281</span> break;<a name="line.281"></a> -<span class="sourceLineNo">282</span> case MERGE_TABLE_REGIONS_OPEN_MERGED_REGION:<a name="line.282"></a> -<span class="sourceLineNo">283</span> addChildProcedure(createAssignProcedures(env));<a name="line.283"></a> -<span class="sourceLineNo">284</span> setNextState(MergeTableRegionsState.MERGE_TABLE_REGIONS_POST_OPERATION);<a name="line.284"></a> -<span class="sourceLineNo">285</span> break;<a name="line.285"></a> -<span class="sourceLineNo">286</span> case MERGE_TABLE_REGIONS_POST_OPERATION:<a name="line.286"></a> -<span class="sourceLineNo">287</span> postCompletedMergeRegions(env);<a name="line.287"></a> -<span class="sourceLineNo">288</span> return Flow.NO_MORE_STATE;<a name="line.288"></a> -<span class="sourceLineNo">289</span> default:<a name="line.289"></a> -<span class="sourceLineNo">290</span> throw new UnsupportedOperationException(this + " unhandled state=" + state);<a name="line.290"></a> -<span class="sourceLineNo">291</span> }<a name="line.291"></a> -<span class="sourceLineNo">292</span> } catch (IOException e) {<a name="line.292"></a> -<span class="sourceLineNo">293</span> String msg = "Error trying to merge regions " +<a name="line.293"></a> -<span class="sourceLineNo">294</span> RegionInfo.getShortNameToLog(regionsToMerge) + " in the table " + getTableName() +<a name="line.294"></a> -<span class="sourceLineNo">295</span> " (in state=" + state + ")";<a name="line.295"></a> -<span class="sourceLineNo">296</span> if (!isRollbackSupported(state)) {<a name="line.296"></a> -<span class="sourceLineNo">297</span> // We reach a state that cannot be rolled back. We just need to keep retrying.<a name="line.297"></a> -<span class="sourceLineNo">298</span> LOG.warn(msg, e);<a name="line.298"></a> -<span class="sourceLineNo">299</span> } else {<a name="line.299"></a> -<span class="sourceLineNo">300</span> LOG.error(msg, e);<a name="line.300"></a> -<span class="sourceLineNo">301</span> setFailure("master-merge-regions", e);<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> return Flow.HAS_MORE_STATE;<a name="line.304"></a> -<span class="sourceLineNo">305</span> }<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> * To rollback {@link MergeTableRegionsProcedure}, two AssignProcedures are asynchronously<a name="line.308"></a> -<span class="sourceLineNo">309</span> * submitted for each region to be merged (rollback doesn't wait on the completion of the<a name="line.309"></a> -<span class="sourceLineNo">310</span> * AssignProcedures) . 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Unless there is a bug in the code,<a name="line.352"></a> -<span class="sourceLineNo">353</span> // this should be just a "temporary error" (e.g. network down)<a name="line.353"></a> -<span class="sourceLineNo">354</span> LOG.warn("Failed rollback attempt step " + state + " for merging the regions "<a name="line.354"></a> -<span class="sourceLineNo">355</span> + RegionInfo.getShortNameToLog(regionsToMerge) + " in table " + getTableName(), e);<a name="line.355"></a> -<span class="sourceLineNo">356</span> throw e;<a name="line.356"></a> -<span class="sourceLineNo">357</span> }<a name="line.357"></a> -<span class="sourceLineNo">358</span> }<a name="line.358"></a> -<span class="sourceLineNo">359</span><a name="line.359"></a> -<span class="sourceLineNo">360</span> /*<a name="line.360"></a> -<span class="sourceLineNo">361</span> * Check whether we are in the state that can be rolled back<a name="line.361"></a> -<span class="sourceLineNo">362</span> */<a name="line.362"></a> -<span class="sourceLineNo">363</span> @Override<a name="line.363"></a> -<span class="sourceLineNo">364</span> protected boolean isRollbackSupported(final MergeTableRegionsState state) {<a name="line.364"></a> -<span class="sourceLineNo">365</span> switch (state) {<a name="line.365"></a> -<span class="sourceLineNo">366</span> case MERGE_TABLE_REGIONS_POST_OPERATION:<a name="line.366"></a> -<span class="sourceLineNo">367</span> case MERGE_TABLE_REGIONS_OPEN_MERGED_REGION:<a name="line.367"></a> -<span class="sourceLineNo">368</span> case MERGE_TABLE_REGIONS_POST_MERGE_COMMIT_OPERATION:<a name="line.368"></a> -<span class="sourceLineNo">369</span> case MERGE_TABLE_REGIONS_UPDATE_META:<a name="line.369"></a> -<span class="sourceLineNo">370</span> // It is not safe to rollback in these states.<a name="line.370"></a> -<span class="sourceLineNo">371</span> return false;<a name="line.371"></a> -<span class="sourceLineNo">372</span> default:<a name="line.372"></a> -<span class="sourceLineNo">373</span> break;<a name="line.373"></a> -<span class="sourceLineNo">374</span> }<a name="line.374"></a> -<span class="sourceLineNo">375</span> return true;<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> @Override<a name="line.378"></a> -<span class="sourceLineNo">379</span> protected MergeTableRegionsState getState(final int stateId) {<a name="line.379"></a> -<span class="sourceLineNo">380</span> return MergeTableRegionsState.forNumber(stateId);<a name="line.380"></a> -<span class="sourceLineNo">381</span> }<a name="line.381"></a> -<span class="sourceLineNo">382</span><a name="line.382"></a> -<span class="sourceLineNo">383</span> @Override<a name="line.383"></a> -<span class="sourceLineNo">384</span> protected int getStateId(final MergeTableRegionsState state) {<a name="line.384"></a> -<span class="sourceLineNo">385</span> return state.getNumber();<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> @Override<a name="line.388"></a> -<span class="sourceLineNo">389</span> protected MergeTableRegionsState getInitialState() {<a name="line.389"></a> -<span class="sourceLineNo">390</span> return MergeTableRegionsState.MERGE_TABLE_REGIONS_PREPARE;<a name="line.390"></a> -<span class="sourceLineNo">391</span> }<a name="line.391"></a> -<span class="sourceLineNo">392</span><a name="line.392"></a> -<span class="sourceLineNo">393</span> @Override<a name="line.393"></a> -<span class="sourceLineNo">394</span> protected void serializeStateData(ProcedureStateSerializer serializer)<a name="line.394"></a> -<span class="sourceLineNo">395</span> throws IOException {<a name="line.395"></a> -<span class="sourceLineNo">396</span> super.serializeStateData(serializer);<a name="line.396"></a> 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table regions action.<a name="line.575"></a> -<span class="sourceLineNo">576</span> * @param env MasterProcedureEnv<a name="line.576"></a> -<span class="sourceLineNo">577</span> * @throws IOException<a name="line.577"></a> -<span class="sourceLineNo">578</span> */<a name="line.578"></a> -<span class="sourceLineNo">579</span> private void postRollBackMergeRegions(final MasterProcedureEnv env) throws IOException {<a name="line.579"></a> -<span class="sourceLineNo">580</span> final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();<a name="line.580"></a> -<span class="sourceLineNo">581</span> if (cpHost != null) {<a name="line.581"></a> -<span class="sourceLineNo">582</span> cpHost.postRollBackMergeRegionsAction(regionsToMerge, getUser());<a name="line.582"></a> -<span class="sourceLineNo">583</span> }<a name="line.583"></a> -<span class="sourceLineNo">584</span> }<a name="line.584"></a> -<span class="sourceLineNo">585</span><a name="line.585"></a> -<span 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name="line.595"></a> -<span class="sourceLineNo">596</span> /**<a name="line.596"></a> -<span class="sourceLineNo">597</span> * Create a merged region<a name="line.597"></a> -<span class="sourceLineNo">598</span> * @param env MasterProcedureEnv<a name="line.598"></a> -<span class="sourceLineNo">599</span> */<a name="line.599"></a> -<span class="sourceLineNo">600</span> private void createMergedRegion(final MasterProcedureEnv env) throws IOException {<a name="line.600"></a> -<span class="sourceLineNo">601</span> final MasterFileSystem mfs = env.getMasterServices().getMasterFileSystem();<a name="line.601"></a> -<span class="sourceLineNo">602</span> final Path tabledir = FSUtils.getTableDir(mfs.getRootDir(), regionsToMerge[0].getTable());<a name="line.602"></a> -<span class="sourceLineNo">603</span> final FileSystem fs = mfs.getFileSystem();<a name="line.603"></a> -<span class="sourceLineNo">604</span> HRegionFileSystem regionFs = HRegionFileSystem.openRegionFromFileSystem(<a 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class="sourceLineNo">614</span><a name="line.614"></a> -<span class="sourceLineNo">615</span> //Prepare to create merged regions<a name="line.615"></a> -<span class="sourceLineNo">616</span> env.getAssignmentManager().getRegionStates().<a name="line.616"></a> -<span class="sourceLineNo">617</span> getOrCreateRegionStateNode(mergedRegion).setState(State.MERGING_NEW);<a name="line.617"></a> -<span class="sourceLineNo">618</span> }<a name="line.618"></a> -<span class="sourceLineNo">619</span><a name="line.619"></a> -<span class="sourceLineNo">620</span> /**<a name="line.620"></a> -<span class="sourceLineNo">621</span> * Create reference file(s) of merging regions under the merged directory<a name="line.621"></a> -<span class="sourceLineNo">622</span> * @param env MasterProcedureEnv<a name="line.622"></a> -<span class="sourceLineNo">623</span> * @param regionFs region file system<a name="line.623"></a> -<span class="sourceLineNo">624</span> * @param mergedDir the temp directory of merged region<a name="line.624"></a> -<span class="sourceLineNo">625</span> */<a name="line.625"></a> -<span class="sourceLineNo">626</span> private void mergeStoreFiles(<a name="line.626"></a> -<span class="sourceLineNo">627</span> final MasterProcedureEnv env, final HRegionFileSystem regionFs, final Path mergedDir)<a name="line.627"></a> -<span class="sourceLineNo">628</span> throws IOException {<a name="line.628"></a> -<span class="sourceLineNo">629</span> final MasterFileSystem mfs = env.getMasterServices().getMasterFileSystem();<a name="line.629"></a> -<span class="sourceLineNo">630</span> final Configuration conf = env.getMasterConfiguration();<a name="line.630"></a> -<span class="sourceLineNo">631</span> final TableDescriptor htd = env.getMasterServices().getTableDescriptors().get(getTableName());<a name="line.631"></a> -<span class="sourceLineNo">632</span><a name="line.632"></a> -<span class="sourceLineNo">633</span> for (String family: regionFs.getFamilies()) {<a 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class="sourceLineNo">642</span> storeFileInfo, conf, cacheConf, hcd.getBloomFilterType(), true),<a name="line.642"></a> -<span class="sourceLineNo">643</span> mergedDir);<a name="line.643"></a> -<span class="sourceLineNo">644</span> }<a name="line.644"></a> -<span class="sourceLineNo">645</span> }<a name="line.645"></a> -<span class="sourceLineNo">646</span> }<a name="line.646"></a> -<span class="sourceLineNo">647</span> }<a name="line.647"></a> -<span class="sourceLineNo">648</span><a name="line.648"></a> -<span class="sourceLineNo">649</span> /**<a name="line.649"></a> -<span class="sourceLineNo">650</span> * Clean up a merged region<a name="line.650"></a> -<span class="sourceLineNo">651</span> * @param env MasterProcedureEnv<a name="line.651"></a> -<span class="sourceLineNo">652</span> */<a name="line.652"></a> -<span class="sourceLineNo">653</span> private void cleanupMergedRegion(final MasterProcedureEnv env) throws IOException {<a name="line.653"></a> -<span class="sourceLineNo">654</span> final MasterFileSystem mfs = env.getMasterServices().getMasterFileSystem();<a name="line.654"></a> -<span class="sourceLineNo">655</span> final Path tabledir = FSUtils.getTableDir(mfs.getRootDir(), regionsToMerge[0].getTable());<a name="line.655"></a> -<span class="sourceLineNo">656</span> final FileSystem fs = mfs.getFileSystem();<a name="line.656"></a> -<span class="sourceLineNo">657</span> HRegionFileSystem regionFs = HRegionFileSystem.openRegionFromFileSystem(<a name="line.657"></a> -<span class="sourceLineNo">658</span> env.getMasterConfiguration(), fs, tabledir, regionsToMerge[0], false);<a name="line.658"></a> -<span class="sourceLineNo">659</span> regionFs.cleanupMergedRegion(mergedRegion);<a name="line.659"></a> -<span class="sourceLineNo">660</span> }<a name="line.660"></a> -<span class="sourceLineNo">661</span><a name="line.661"></a> -<span class="sourceLineNo">662</span> /**<a name="line.662"></a> -<span class="sourceLineNo">663</span> * 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throws IOException {<a name="line.682"></a> -<span class="sourceLineNo">683</span> final TableDescriptor htd = env.getMasterServices().getTableDescriptors().get(getTableName());<a name="line.683"></a> -<span class="sourceLineNo">684</span> return htd.getRegionReplication();<a name="line.684"></a> -<span class="sourceLineNo">685</span>
<TRUNCATED>
