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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.master;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.Arrays;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.List;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.conf.Configuration;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.HConstants;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.MetaTableAccessor;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.TableName;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.client.Put;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.client.RegionInfoBuilder;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.slf4j.Logger;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.slf4j.LoggerFactory;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span>/**<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * Server-side fixing of bad or inconsistent state in hbase:meta.<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * Distinct from MetaTableAccessor because {@link MetaTableAccessor} is about low-level<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * manipulations driven by the Master. This class MetaFixer is<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * employed by the Master and it 'knows' about holes and orphan<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * and encapsulates their fixing on behalf of the Master.<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> */<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>@InterfaceAudience.Private<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>class MetaFixer {<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> private static final Logger LOG = LoggerFactory.getLogger(MetaFixer.class);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> private final MasterServices masterServices;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> MetaFixer(MasterServices masterServices) {<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> this.masterServices = masterServices;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> }<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> void fix() throws IOException {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> CatalogJanitor.Report report = this.masterServices.getCatalogJanitor().getLastReport();<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> if (report == null) {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> LOG.info("CatalogJanitor has not generated a report yet; run 'catalogjanitor_run' in " +<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> "shell or wait until CatalogJanitor chore runs.");<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> return;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> }<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> fixHoles(report);<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> fixOverlaps(report);<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> }<a name="line.64"></a> |
| <span class="sourceLineNo">065</span><a name="line.65"></a> |
| <span class="sourceLineNo">066</span> /**<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * If hole, it papers it over by adding a region in the filesystem and to hbase:meta.<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * Does not assign.<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * @return True if we fixed any 'holes'.<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> */<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> boolean fixHoles(CatalogJanitor.Report report) throws IOException {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> boolean result = false;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> List<Pair<RegionInfo, RegionInfo>> holes = report.getHoles();<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> if (holes.isEmpty()) {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> LOG.debug("No holes.");<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> return result;<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> }<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> for (Pair<RegionInfo, RegionInfo> p: holes) {<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> RegionInfo ri = getHoleCover(p);<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> if (ri == null) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> continue;<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> }<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> Configuration configuration = this.masterServices.getConfiguration();<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> HRegion.createRegionDir(configuration, ri, FSUtils.getRootDir(configuration));<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> // If an error here, then we'll have a region in the filesystem but not<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> // in hbase:meta (if the below fails). Should be able to rerun the fix.<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> // The second call to createRegionDir will just go through. Idempotent.<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> Put put = MetaTableAccessor.makePutFromRegionInfo(ri, HConstants.LATEST_TIMESTAMP);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> MetaTableAccessor.putsToMetaTable(this.masterServices.getConnection(), Arrays.asList(put));<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> LOG.info("Fixed hole by adding {}; region is NOT assigned (assign to online).", ri);<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> result = true;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> }<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> return result;<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> * @return Calculated RegionInfo that covers the hole <code>hole</code><a name="line.97"></a> |
| <span class="sourceLineNo">098</span> */<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> private RegionInfo getHoleCover(Pair<RegionInfo, RegionInfo> hole) {<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> RegionInfo holeCover = null;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> RegionInfo left = hole.getFirst();<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> RegionInfo right = hole.getSecond();<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> if (left.getTable().equals(right.getTable())) {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> // Simple case.<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> if (Bytes.compareTo(left.getEndKey(), right.getStartKey()) >= 0) {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> LOG.warn("Skipping hole fix; left-side endKey is not less than right-side startKey; " +<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> "left=<{}>, right=<{}>", left, right);<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> return holeCover;<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> }<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> holeCover = buildRegionInfo(left.getTable(), left.getEndKey(), right.getStartKey());<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> } else {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> boolean leftUndefined = left.equals(RegionInfo.UNDEFINED);<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> boolean rightUnefined = right.equals(RegionInfo.UNDEFINED);<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> boolean last = left.isLast();<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> boolean first = right.isFirst();<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> if (leftUndefined && rightUnefined) {<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> LOG.warn("Skipping hole fix; both the hole left-side and right-side RegionInfos are " +<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> "UNDEFINED; left=<{}>, right=<{}>", left, right);<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> return holeCover;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> if (leftUndefined || last) {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> holeCover = buildRegionInfo(right.getTable(), HConstants.EMPTY_START_ROW,<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> right.getStartKey());<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> } else if (rightUnefined || first) {<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> holeCover = buildRegionInfo(left.getTable(), left.getEndKey(), HConstants.EMPTY_END_ROW);<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> } else {<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> LOG.warn("Skipping hole fix; don't know what to do with left=<{}>, right=<{}>",<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> left, right);<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> return holeCover;<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> }<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> }<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> return holeCover;<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> }<a name="line.133"></a> |
| <span class="sourceLineNo">134</span><a name="line.134"></a> |
| <span class="sourceLineNo">135</span> private RegionInfo buildRegionInfo(TableName tn, byte [] start, byte [] end) {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> return RegionInfoBuilder.newBuilder(tn).setStartKey(start).setEndKey(end).build();<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span><a name="line.138"></a> |
| <span class="sourceLineNo">139</span> boolean fixOverlaps(CatalogJanitor.Report report) throws IOException {<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> boolean result = false;<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> List<Pair<RegionInfo, RegionInfo>> overlaps = report.getOverlaps();<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> if (overlaps.isEmpty()) {<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> LOG.debug("No overlaps.");<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> return result;<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> }<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> for (Pair<RegionInfo, RegionInfo> p: overlaps) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> RegionInfo ri = getHoleCover(p);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> if (ri == null) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> continue;<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> }<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> Configuration configuration = this.masterServices.getConfiguration();<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> HRegion.createRegionDir(configuration, ri, FSUtils.getRootDir(configuration));<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> // If an error here, then we'll have a region in the filesystem but not<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> // in hbase:meta (if the below fails). Should be able to rerun the fix.<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> // The second call to createRegionDir will just go through. Idempotent.<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> Put put = MetaTableAccessor.makePutFromRegionInfo(ri, HConstants.LATEST_TIMESTAMP);<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> MetaTableAccessor.putsToMetaTable(this.masterServices.getConnection(), Arrays.asList(put));<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> LOG.info("Fixed hole by adding {}; region is NOT assigned (assign to online).", ri);<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> result = true;<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> }<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> return result;<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> }<a name="line.162"></a> |
| <span class="sourceLineNo">163</span>}<a name="line.163"></a> |
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