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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.wal;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.FileNotFoundException;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Collections;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.Comparator;<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.concurrent.atomic.AtomicBoolean;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.locks.ReadWriteLock;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.regex.Matcher;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.regex.Pattern;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.conf.Configuration;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.fs.FileSystem;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.fs.Path;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.Abortable;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.HConstants;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.ServerName;<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.regionserver.wal.AbstractFSWAL;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.util.CancelableProgressable;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.util.CommonFSUtils;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.util.LeaseNotRecoveredException;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.util.RecoverLeaseFSUtils;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import org.slf4j.Logger;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import org.slf4j.LoggerFactory;<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span>import org.apache.hbase.thirdparty.com.google.common.collect.Lists;<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span>/**<a name="line.52"></a>
<span class="sourceLineNo">053</span> * Base class of a WAL Provider that returns a single thread safe WAL that writes to Hadoop FS. By<a name="line.53"></a>
<span class="sourceLineNo">054</span> * default, this implementation picks a directory in Hadoop FS based on a combination of<a name="line.54"></a>
<span class="sourceLineNo">055</span> * &lt;ul&gt;<a name="line.55"></a>
<span class="sourceLineNo">056</span> * &lt;li&gt;the HBase root directory<a name="line.56"></a>
<span class="sourceLineNo">057</span> * &lt;li&gt;HConstants.HREGION_LOGDIR_NAME<a name="line.57"></a>
<span class="sourceLineNo">058</span> * &lt;li&gt;the given factory's factoryId (usually identifying the regionserver by host:port)<a name="line.58"></a>
<span class="sourceLineNo">059</span> * &lt;/ul&gt;<a name="line.59"></a>
<span class="sourceLineNo">060</span> * It also uses the providerId to differentiate among files.<a name="line.60"></a>
<span class="sourceLineNo">061</span> */<a name="line.61"></a>
<span class="sourceLineNo">062</span>@InterfaceAudience.Private<a name="line.62"></a>
<span class="sourceLineNo">063</span>@InterfaceStability.Evolving<a name="line.63"></a>
<span class="sourceLineNo">064</span>public abstract class AbstractFSWALProvider&lt;T extends AbstractFSWAL&lt;?&gt;&gt; implements WALProvider {<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span> private static final Logger LOG = LoggerFactory.getLogger(AbstractFSWALProvider.class);<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span> /** Separate old log into different dir by regionserver name **/<a name="line.68"></a>
<span class="sourceLineNo">069</span> public static final String SEPARATE_OLDLOGDIR = "hbase.separate.oldlogdir.by.regionserver";<a name="line.69"></a>
<span class="sourceLineNo">070</span> public static final boolean DEFAULT_SEPARATE_OLDLOGDIR = false;<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span> // Only public so classes back in regionserver.wal can access<a name="line.72"></a>
<span class="sourceLineNo">073</span> public interface Reader extends WAL.Reader {<a name="line.73"></a>
<span class="sourceLineNo">074</span> /**<a name="line.74"></a>
<span class="sourceLineNo">075</span> * @param fs File system.<a name="line.75"></a>
<span class="sourceLineNo">076</span> * @param path Path.<a name="line.76"></a>
<span class="sourceLineNo">077</span> * @param c Configuration.<a name="line.77"></a>
<span class="sourceLineNo">078</span> * @param s Input stream that may have been pre-opened by the caller; may be null.<a name="line.78"></a>
<span class="sourceLineNo">079</span> */<a name="line.79"></a>
<span class="sourceLineNo">080</span> void init(FileSystem fs, Path path, Configuration c, FSDataInputStream s) throws IOException;<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> protected volatile T wal;<a name="line.83"></a>
<span class="sourceLineNo">084</span> protected WALFactory factory;<a name="line.84"></a>
<span class="sourceLineNo">085</span> protected Configuration conf;<a name="line.85"></a>
<span class="sourceLineNo">086</span> protected List&lt;WALActionsListener&gt; listeners = new ArrayList&lt;&gt;();<a name="line.86"></a>
<span class="sourceLineNo">087</span> protected String providerId;<a name="line.87"></a>
<span class="sourceLineNo">088</span> protected AtomicBoolean initialized = new AtomicBoolean(false);<a name="line.88"></a>
<span class="sourceLineNo">089</span> // for default wal provider, logPrefix won't change<a name="line.89"></a>
<span class="sourceLineNo">090</span> protected String logPrefix;<a name="line.90"></a>
<span class="sourceLineNo">091</span> protected Abortable abortable;<a name="line.91"></a>
<span class="sourceLineNo">092</span><a name="line.92"></a>
<span class="sourceLineNo">093</span> /**<a name="line.93"></a>
<span class="sourceLineNo">094</span> * We use walCreateLock to prevent wal recreation in different threads, and also prevent getWALs<a name="line.94"></a>
<span class="sourceLineNo">095</span> * missing the newly created WAL, see HBASE-21503 for more details.<a name="line.95"></a>
<span class="sourceLineNo">096</span> */<a name="line.96"></a>
<span class="sourceLineNo">097</span> private final ReadWriteLock walCreateLock = new ReentrantReadWriteLock();<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span> /**<a name="line.99"></a>
<span class="sourceLineNo">100</span> * @param factory factory that made us, identity used for FS layout. may not be null<a name="line.100"></a>
<span class="sourceLineNo">101</span> * @param conf may not be null<a name="line.101"></a>
<span class="sourceLineNo">102</span> * @param providerId differentiate between providers from one factory, used for FS layout. may be<a name="line.102"></a>
<span class="sourceLineNo">103</span> * null<a name="line.103"></a>
<span class="sourceLineNo">104</span> */<a name="line.104"></a>
<span class="sourceLineNo">105</span> @Override<a name="line.105"></a>
<span class="sourceLineNo">106</span> public void init(WALFactory factory, Configuration conf, String providerId, Abortable abortable)<a name="line.106"></a>
<span class="sourceLineNo">107</span> throws IOException {<a name="line.107"></a>
<span class="sourceLineNo">108</span> if (!initialized.compareAndSet(false, true)) {<a name="line.108"></a>
<span class="sourceLineNo">109</span> throw new IllegalStateException("WALProvider.init should only be called once.");<a name="line.109"></a>
<span class="sourceLineNo">110</span> }<a name="line.110"></a>
<span class="sourceLineNo">111</span> this.factory = factory;<a name="line.111"></a>
<span class="sourceLineNo">112</span> this.conf = conf;<a name="line.112"></a>
<span class="sourceLineNo">113</span> this.providerId = providerId;<a name="line.113"></a>
<span class="sourceLineNo">114</span> // get log prefix<a name="line.114"></a>
<span class="sourceLineNo">115</span> StringBuilder sb = new StringBuilder().append(factory.factoryId);<a name="line.115"></a>
<span class="sourceLineNo">116</span> if (providerId != null) {<a name="line.116"></a>
<span class="sourceLineNo">117</span> if (providerId.startsWith(WAL_FILE_NAME_DELIMITER)) {<a name="line.117"></a>
<span class="sourceLineNo">118</span> sb.append(providerId);<a name="line.118"></a>
<span class="sourceLineNo">119</span> } else {<a name="line.119"></a>
<span class="sourceLineNo">120</span> sb.append(WAL_FILE_NAME_DELIMITER).append(providerId);<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span> }<a name="line.122"></a>
<span class="sourceLineNo">123</span> logPrefix = sb.toString();<a name="line.123"></a>
<span class="sourceLineNo">124</span> this.abortable = abortable;<a name="line.124"></a>
<span class="sourceLineNo">125</span> doInit(conf);<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> @Override<a name="line.128"></a>
<span class="sourceLineNo">129</span> public List&lt;WAL&gt; getWALs() {<a name="line.129"></a>
<span class="sourceLineNo">130</span> if (wal != null) {<a name="line.130"></a>
<span class="sourceLineNo">131</span> return Lists.newArrayList(wal);<a name="line.131"></a>
<span class="sourceLineNo">132</span> }<a name="line.132"></a>
<span class="sourceLineNo">133</span> walCreateLock.readLock().lock();<a name="line.133"></a>
<span class="sourceLineNo">134</span> try {<a name="line.134"></a>
<span class="sourceLineNo">135</span> if (wal == null) {<a name="line.135"></a>
<span class="sourceLineNo">136</span> return Collections.emptyList();<a name="line.136"></a>
<span class="sourceLineNo">137</span> } else {<a name="line.137"></a>
<span class="sourceLineNo">138</span> return Lists.newArrayList(wal);<a name="line.138"></a>
<span class="sourceLineNo">139</span> }<a name="line.139"></a>
<span class="sourceLineNo">140</span> } finally {<a name="line.140"></a>
<span class="sourceLineNo">141</span> walCreateLock.readLock().unlock();<a name="line.141"></a>
<span class="sourceLineNo">142</span> }<a name="line.142"></a>
<span class="sourceLineNo">143</span> }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span> @Override<a name="line.145"></a>
<span class="sourceLineNo">146</span> public T getWAL(RegionInfo region) throws IOException {<a name="line.146"></a>
<span class="sourceLineNo">147</span> T walCopy = wal;<a name="line.147"></a>
<span class="sourceLineNo">148</span> if (walCopy != null) {<a name="line.148"></a>
<span class="sourceLineNo">149</span> return walCopy;<a name="line.149"></a>
<span class="sourceLineNo">150</span> }<a name="line.150"></a>
<span class="sourceLineNo">151</span> walCreateLock.writeLock().lock();<a name="line.151"></a>
<span class="sourceLineNo">152</span> try {<a name="line.152"></a>
<span class="sourceLineNo">153</span> walCopy = wal;<a name="line.153"></a>
<span class="sourceLineNo">154</span> if (walCopy != null) {<a name="line.154"></a>
<span class="sourceLineNo">155</span> return walCopy;<a name="line.155"></a>
<span class="sourceLineNo">156</span> }<a name="line.156"></a>
<span class="sourceLineNo">157</span> walCopy = createWAL();<a name="line.157"></a>
<span class="sourceLineNo">158</span> boolean succ = false;<a name="line.158"></a>
<span class="sourceLineNo">159</span> try {<a name="line.159"></a>
<span class="sourceLineNo">160</span> walCopy.init();<a name="line.160"></a>
<span class="sourceLineNo">161</span> succ = true;<a name="line.161"></a>
<span class="sourceLineNo">162</span> } finally {<a name="line.162"></a>
<span class="sourceLineNo">163</span> if (!succ) {<a name="line.163"></a>
<span class="sourceLineNo">164</span> walCopy.close();<a name="line.164"></a>
<span class="sourceLineNo">165</span> }<a name="line.165"></a>
<span class="sourceLineNo">166</span> }<a name="line.166"></a>
<span class="sourceLineNo">167</span> wal = walCopy;<a name="line.167"></a>
<span class="sourceLineNo">168</span> return walCopy;<a name="line.168"></a>
<span class="sourceLineNo">169</span> } finally {<a name="line.169"></a>
<span class="sourceLineNo">170</span> walCreateLock.writeLock().unlock();<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><a name="line.173"></a>
<span class="sourceLineNo">174</span> protected abstract T createWAL() throws IOException;<a name="line.174"></a>
<span class="sourceLineNo">175</span><a name="line.175"></a>
<span class="sourceLineNo">176</span> protected abstract void doInit(Configuration conf) throws IOException;<a name="line.176"></a>
<span class="sourceLineNo">177</span><a name="line.177"></a>
<span class="sourceLineNo">178</span> @Override<a name="line.178"></a>
<span class="sourceLineNo">179</span> public void shutdown() throws IOException {<a name="line.179"></a>
<span class="sourceLineNo">180</span> T log = this.wal;<a name="line.180"></a>
<span class="sourceLineNo">181</span> if (log != null) {<a name="line.181"></a>
<span class="sourceLineNo">182</span> log.shutdown();<a name="line.182"></a>
<span class="sourceLineNo">183</span> }<a name="line.183"></a>
<span class="sourceLineNo">184</span> }<a name="line.184"></a>
<span class="sourceLineNo">185</span><a name="line.185"></a>
<span class="sourceLineNo">186</span> @Override<a name="line.186"></a>
<span class="sourceLineNo">187</span> public void close() throws IOException {<a name="line.187"></a>
<span class="sourceLineNo">188</span> T log = this.wal;<a name="line.188"></a>
<span class="sourceLineNo">189</span> if (log != null) {<a name="line.189"></a>
<span class="sourceLineNo">190</span> log.close();<a name="line.190"></a>
<span class="sourceLineNo">191</span> }<a name="line.191"></a>
<span class="sourceLineNo">192</span> }<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span> /**<a name="line.194"></a>
<span class="sourceLineNo">195</span> * iff the given WALFactory is using the DefaultWALProvider for meta and/or non-meta, count the<a name="line.195"></a>
<span class="sourceLineNo">196</span> * number of files (rolled and active). if either of them aren't, count 0 for that provider.<a name="line.196"></a>
<span class="sourceLineNo">197</span> */<a name="line.197"></a>
<span class="sourceLineNo">198</span> @Override<a name="line.198"></a>
<span class="sourceLineNo">199</span> public long getNumLogFiles() {<a name="line.199"></a>
<span class="sourceLineNo">200</span> T log = this.wal;<a name="line.200"></a>
<span class="sourceLineNo">201</span> return log == null ? 0 : log.getNumLogFiles();<a name="line.201"></a>
<span class="sourceLineNo">202</span> }<a name="line.202"></a>
<span class="sourceLineNo">203</span><a name="line.203"></a>
<span class="sourceLineNo">204</span> /**<a name="line.204"></a>
<span class="sourceLineNo">205</span> * iff the given WALFactory is using the DefaultWALProvider for meta and/or non-meta, count the<a name="line.205"></a>
<span class="sourceLineNo">206</span> * size of files (only rolled). if either of them aren't, count 0 for that provider.<a name="line.206"></a>
<span class="sourceLineNo">207</span> */<a name="line.207"></a>
<span class="sourceLineNo">208</span> @Override<a name="line.208"></a>
<span class="sourceLineNo">209</span> public long getLogFileSize() {<a name="line.209"></a>
<span class="sourceLineNo">210</span> T log = this.wal;<a name="line.210"></a>
<span class="sourceLineNo">211</span> return log == null ? 0 : log.getLogFileSize();<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> /**<a name="line.214"></a>
<span class="sourceLineNo">215</span> * returns the number of rolled WAL files.<a name="line.215"></a>
<span class="sourceLineNo">216</span> */<a name="line.216"></a>
<span class="sourceLineNo">217</span> public static int getNumRolledLogFiles(WAL wal) {<a name="line.217"></a>
<span class="sourceLineNo">218</span> return ((AbstractFSWAL&lt;?&gt;) wal).getNumRolledLogFiles();<a name="line.218"></a>
<span class="sourceLineNo">219</span> }<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">222</span> * returns the size of rolled WAL files.<a name="line.222"></a>
<span class="sourceLineNo">223</span> */<a name="line.223"></a>
<span class="sourceLineNo">224</span> public static long getLogFileSize(WAL wal) {<a name="line.224"></a>
<span class="sourceLineNo">225</span> return ((AbstractFSWAL&lt;?&gt;) wal).getLogFileSize();<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> /**<a name="line.228"></a>
<span class="sourceLineNo">229</span> * return the current filename from the current wal.<a name="line.229"></a>
<span class="sourceLineNo">230</span> */<a name="line.230"></a>
<span class="sourceLineNo">231</span> public static Path getCurrentFileName(final WAL wal) {<a name="line.231"></a>
<span class="sourceLineNo">232</span> return ((AbstractFSWAL&lt;?&gt;) wal).getCurrentFileName();<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> * request a log roll, but don't actually do it.<a name="line.236"></a>
<span class="sourceLineNo">237</span> */<a name="line.237"></a>
<span class="sourceLineNo">238</span> static void requestLogRoll(final WAL wal) {<a name="line.238"></a>
<span class="sourceLineNo">239</span> ((AbstractFSWAL&lt;?&gt;) wal).requestLogRoll();<a name="line.239"></a>
<span class="sourceLineNo">240</span> }<a name="line.240"></a>
<span class="sourceLineNo">241</span><a name="line.241"></a>
<span class="sourceLineNo">242</span> // should be package private; more visible for use in AbstractFSWAL<a name="line.242"></a>
<span class="sourceLineNo">243</span> public static final String WAL_FILE_NAME_DELIMITER = ".";<a name="line.243"></a>
<span class="sourceLineNo">244</span> /** The hbase:meta region's WAL filename extension */<a name="line.244"></a>
<span class="sourceLineNo">245</span> public static final String META_WAL_PROVIDER_ID = ".meta";<a name="line.245"></a>
<span class="sourceLineNo">246</span> static final String DEFAULT_PROVIDER_ID = "default";<a name="line.246"></a>
<span class="sourceLineNo">247</span><a name="line.247"></a>
<span class="sourceLineNo">248</span> // Implementation details that currently leak in tests or elsewhere follow<a name="line.248"></a>
<span class="sourceLineNo">249</span> /** File Extension used while splitting an WAL into regions (HBASE-2312) */<a name="line.249"></a>
<span class="sourceLineNo">250</span> public static final String SPLITTING_EXT = "-splitting";<a name="line.250"></a>
<span class="sourceLineNo">251</span><a name="line.251"></a>
<span class="sourceLineNo">252</span> /**<a name="line.252"></a>
<span class="sourceLineNo">253</span> * Pattern used to validate a WAL file name see {@link #validateWALFilename(String)} for<a name="line.253"></a>
<span class="sourceLineNo">254</span> * description.<a name="line.254"></a>
<span class="sourceLineNo">255</span> */<a name="line.255"></a>
<span class="sourceLineNo">256</span> private static final Pattern WAL_FILE_NAME_PATTERN =<a name="line.256"></a>
<span class="sourceLineNo">257</span> Pattern.compile("(.+)\\.(\\d+)(\\.[0-9A-Za-z]+)?");<a name="line.257"></a>
<span class="sourceLineNo">258</span><a name="line.258"></a>
<span class="sourceLineNo">259</span> /**<a name="line.259"></a>
<span class="sourceLineNo">260</span> * Define for when no timestamp found.<a name="line.260"></a>
<span class="sourceLineNo">261</span> */<a name="line.261"></a>
<span class="sourceLineNo">262</span> private static final long NO_TIMESTAMP = -1L;<a name="line.262"></a>
<span class="sourceLineNo">263</span><a name="line.263"></a>
<span class="sourceLineNo">264</span> /**<a name="line.264"></a>
<span class="sourceLineNo">265</span> * It returns the file create timestamp (the 'FileNum') from the file name. For name format see<a name="line.265"></a>
<span class="sourceLineNo">266</span> * {@link #validateWALFilename(String)} public until remaining tests move to o.a.h.h.wal<a name="line.266"></a>
<span class="sourceLineNo">267</span> * @param wal must not be null<a name="line.267"></a>
<span class="sourceLineNo">268</span> * @return the file number that is part of the WAL file name<a name="line.268"></a>
<span class="sourceLineNo">269</span> */<a name="line.269"></a>
<span class="sourceLineNo">270</span> public static long extractFileNumFromWAL(final WAL wal) {<a name="line.270"></a>
<span class="sourceLineNo">271</span> final Path walPath = ((AbstractFSWAL&lt;?&gt;) wal).getCurrentFileName();<a name="line.271"></a>
<span class="sourceLineNo">272</span> if (walPath == null) {<a name="line.272"></a>
<span class="sourceLineNo">273</span> throw new IllegalArgumentException("The WAL path couldn't be null");<a name="line.273"></a>
<span class="sourceLineNo">274</span> }<a name="line.274"></a>
<span class="sourceLineNo">275</span> String name = walPath.getName();<a name="line.275"></a>
<span class="sourceLineNo">276</span> long timestamp = getTimestamp(name);<a name="line.276"></a>
<span class="sourceLineNo">277</span> if (timestamp == NO_TIMESTAMP) {<a name="line.277"></a>
<span class="sourceLineNo">278</span> throw new IllegalArgumentException(name + " is not a valid wal file name");<a name="line.278"></a>
<span class="sourceLineNo">279</span> }<a name="line.279"></a>
<span class="sourceLineNo">280</span> return timestamp;<a name="line.280"></a>
<span class="sourceLineNo">281</span> }<a name="line.281"></a>
<span class="sourceLineNo">282</span><a name="line.282"></a>
<span class="sourceLineNo">283</span> /**<a name="line.283"></a>
<span class="sourceLineNo">284</span> * A WAL file name is of the format: &amp;lt;wal-name&amp;gt;{@link #WAL_FILE_NAME_DELIMITER}<a name="line.284"></a>
<span class="sourceLineNo">285</span> * &amp;lt;file-creation-timestamp&amp;gt;[.&amp;lt;suffix&amp;gt;]. provider-name is usually made up of a<a name="line.285"></a>
<span class="sourceLineNo">286</span> * server-name and a provider-id<a name="line.286"></a>
<span class="sourceLineNo">287</span> * @param filename name of the file to validate<a name="line.287"></a>
<span class="sourceLineNo">288</span> * @return &lt;tt&gt;true&lt;/tt&gt; if the filename matches an WAL, &lt;tt&gt;false&lt;/tt&gt; otherwise<a name="line.288"></a>
<span class="sourceLineNo">289</span> */<a name="line.289"></a>
<span class="sourceLineNo">290</span> public static boolean validateWALFilename(String filename) {<a name="line.290"></a>
<span class="sourceLineNo">291</span> return WAL_FILE_NAME_PATTERN.matcher(filename).matches();<a name="line.291"></a>
<span class="sourceLineNo">292</span> }<a name="line.292"></a>
<span class="sourceLineNo">293</span><a name="line.293"></a>
<span class="sourceLineNo">294</span> /**<a name="line.294"></a>
<span class="sourceLineNo">295</span> * Split a WAL filename to get a start time. WALs usually have the time we start writing to them<a name="line.295"></a>
<span class="sourceLineNo">296</span> * with as part of their name, usually the suffix. Sometimes there will be an extra suffix as when<a name="line.296"></a>
<span class="sourceLineNo">297</span> * it is a WAL for the meta table. For example, WALs might look like this<a name="line.297"></a>
<span class="sourceLineNo">298</span> * &lt;code&gt;10.20.20.171%3A60020.1277499063250&lt;/code&gt; where &lt;code&gt;1277499063250&lt;/code&gt; is the<a name="line.298"></a>
<span class="sourceLineNo">299</span> * timestamp. Could also be a meta WAL which adds a '.meta' suffix or a synchronous replication<a name="line.299"></a>
<span class="sourceLineNo">300</span> * WAL which adds a '.syncrep' suffix. Check for these. File also may have no timestamp on it. For<a name="line.300"></a>
<span class="sourceLineNo">301</span> * example the recovered.edits files are WALs but are named in ascending order. Here is an<a name="line.301"></a>
<span class="sourceLineNo">302</span> * example: 0000000000000016310. Allow for this.<a name="line.302"></a>
<span class="sourceLineNo">303</span> * @param name Name of the WAL file.<a name="line.303"></a>
<span class="sourceLineNo">304</span> * @return Timestamp or {@link #NO_TIMESTAMP}.<a name="line.304"></a>
<span class="sourceLineNo">305</span> */<a name="line.305"></a>
<span class="sourceLineNo">306</span> public static long getTimestamp(String name) {<a name="line.306"></a>
<span class="sourceLineNo">307</span> Matcher matcher = WAL_FILE_NAME_PATTERN.matcher(name);<a name="line.307"></a>
<span class="sourceLineNo">308</span> return matcher.matches() ? Long.parseLong(matcher.group(2)) : NO_TIMESTAMP;<a name="line.308"></a>
<span class="sourceLineNo">309</span> }<a name="line.309"></a>
<span class="sourceLineNo">310</span><a name="line.310"></a>
<span class="sourceLineNo">311</span> /**<a name="line.311"></a>
<span class="sourceLineNo">312</span> * Construct the directory name for all WALs on a given server. Dir names currently look like this<a name="line.312"></a>
<span class="sourceLineNo">313</span> * for WALs: &lt;code&gt;hbase//WALs/kalashnikov.att.net,61634,1486865297088&lt;/code&gt;.<a name="line.313"></a>
<span class="sourceLineNo">314</span> * @param serverName Server name formatted as described in {@link ServerName}<a name="line.314"></a>
<span class="sourceLineNo">315</span> * @return the relative WAL directory name, e.g. &lt;code&gt;.logs/1.example.org,60030,12345&lt;/code&gt; if<a name="line.315"></a>
<span class="sourceLineNo">316</span> * &lt;code&gt;serverName&lt;/code&gt; passed is &lt;code&gt;1.example.org,60030,12345&lt;/code&gt;<a name="line.316"></a>
<span class="sourceLineNo">317</span> */<a name="line.317"></a>
<span class="sourceLineNo">318</span> public static String getWALDirectoryName(final String serverName) {<a name="line.318"></a>
<span class="sourceLineNo">319</span> StringBuilder dirName = new StringBuilder(HConstants.HREGION_LOGDIR_NAME);<a name="line.319"></a>
<span class="sourceLineNo">320</span> dirName.append("/");<a name="line.320"></a>
<span class="sourceLineNo">321</span> dirName.append(serverName);<a name="line.321"></a>
<span class="sourceLineNo">322</span> return dirName.toString();<a name="line.322"></a>
<span class="sourceLineNo">323</span> }<a name="line.323"></a>
<span class="sourceLineNo">324</span><a name="line.324"></a>
<span class="sourceLineNo">325</span> /**<a name="line.325"></a>
<span class="sourceLineNo">326</span> * Construct the directory name for all old WALs on a given server. The default old WALs dir looks<a name="line.326"></a>
<span class="sourceLineNo">327</span> * like: &lt;code&gt;hbase/oldWALs&lt;/code&gt;. If you config hbase.separate.oldlogdir.by.regionserver to<a name="line.327"></a>
<span class="sourceLineNo">328</span> * true, it looks like &lt;code&gt;hbase//oldWALs/kalashnikov.att.net,61634,1486865297088&lt;/code&gt;.<a name="line.328"></a>
<span class="sourceLineNo">329</span> * @param serverName Server name formatted as described in {@link ServerName}<a name="line.329"></a>
<span class="sourceLineNo">330</span> * @return the relative WAL directory name<a name="line.330"></a>
<span class="sourceLineNo">331</span> */<a name="line.331"></a>
<span class="sourceLineNo">332</span> public static String getWALArchiveDirectoryName(Configuration conf, final String serverName) {<a name="line.332"></a>
<span class="sourceLineNo">333</span> StringBuilder dirName = new StringBuilder(HConstants.HREGION_OLDLOGDIR_NAME);<a name="line.333"></a>
<span class="sourceLineNo">334</span> if (conf.getBoolean(SEPARATE_OLDLOGDIR, DEFAULT_SEPARATE_OLDLOGDIR)) {<a name="line.334"></a>
<span class="sourceLineNo">335</span> dirName.append(Path.SEPARATOR);<a name="line.335"></a>
<span class="sourceLineNo">336</span> dirName.append(serverName);<a name="line.336"></a>
<span class="sourceLineNo">337</span> }<a name="line.337"></a>
<span class="sourceLineNo">338</span> return dirName.toString();<a name="line.338"></a>
<span class="sourceLineNo">339</span> }<a name="line.339"></a>
<span class="sourceLineNo">340</span><a name="line.340"></a>
<span class="sourceLineNo">341</span> /**<a name="line.341"></a>
<span class="sourceLineNo">342</span> * Pulls a ServerName out of a Path generated according to our layout rules. In the below layouts,<a name="line.342"></a>
<span class="sourceLineNo">343</span> * this method ignores the format of the logfile component. Current format: [base directory for<a name="line.343"></a>
<span class="sourceLineNo">344</span> * hbase]/hbase/.logs/ServerName/logfile or [base directory for<a name="line.344"></a>
<span class="sourceLineNo">345</span> * hbase]/hbase/.logs/ServerName-splitting/logfile Expected to work for individual log files and<a name="line.345"></a>
<span class="sourceLineNo">346</span> * server-specific directories.<a name="line.346"></a>
<span class="sourceLineNo">347</span> * @return null if it's not a log file. Returns the ServerName of the region server that created<a name="line.347"></a>
<span class="sourceLineNo">348</span> * this log file otherwise.<a name="line.348"></a>
<span class="sourceLineNo">349</span> */<a name="line.349"></a>
<span class="sourceLineNo">350</span> public static ServerName getServerNameFromWALDirectoryName(Configuration conf, String path)<a name="line.350"></a>
<span class="sourceLineNo">351</span> throws IOException {<a name="line.351"></a>
<span class="sourceLineNo">352</span> if (path == null || path.length() &lt;= HConstants.HREGION_LOGDIR_NAME.length()) {<a name="line.352"></a>
<span class="sourceLineNo">353</span> return null;<a name="line.353"></a>
<span class="sourceLineNo">354</span> }<a name="line.354"></a>
<span class="sourceLineNo">355</span><a name="line.355"></a>
<span class="sourceLineNo">356</span> if (conf == null) {<a name="line.356"></a>
<span class="sourceLineNo">357</span> throw new IllegalArgumentException("parameter conf must be set");<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> final String rootDir = conf.get(HConstants.HBASE_DIR);<a name="line.360"></a>
<span class="sourceLineNo">361</span> if (rootDir == null || rootDir.isEmpty()) {<a name="line.361"></a>
<span class="sourceLineNo">362</span> throw new IllegalArgumentException(HConstants.HBASE_DIR + " key not found in conf.");<a name="line.362"></a>
<span class="sourceLineNo">363</span> }<a name="line.363"></a>
<span class="sourceLineNo">364</span><a name="line.364"></a>
<span class="sourceLineNo">365</span> final StringBuilder startPathSB = new StringBuilder(rootDir);<a name="line.365"></a>
<span class="sourceLineNo">366</span> if (!rootDir.endsWith("/")) {<a name="line.366"></a>
<span class="sourceLineNo">367</span> startPathSB.append('/');<a name="line.367"></a>
<span class="sourceLineNo">368</span> }<a name="line.368"></a>
<span class="sourceLineNo">369</span> startPathSB.append(HConstants.HREGION_LOGDIR_NAME);<a name="line.369"></a>
<span class="sourceLineNo">370</span> if (!HConstants.HREGION_LOGDIR_NAME.endsWith("/")) {<a name="line.370"></a>
<span class="sourceLineNo">371</span> startPathSB.append('/');<a name="line.371"></a>
<span class="sourceLineNo">372</span> }<a name="line.372"></a>
<span class="sourceLineNo">373</span> final String startPath = startPathSB.toString();<a name="line.373"></a>
<span class="sourceLineNo">374</span><a name="line.374"></a>
<span class="sourceLineNo">375</span> String fullPath;<a name="line.375"></a>
<span class="sourceLineNo">376</span> try {<a name="line.376"></a>
<span class="sourceLineNo">377</span> fullPath = FileSystem.get(conf).makeQualified(new Path(path)).toString();<a name="line.377"></a>
<span class="sourceLineNo">378</span> } catch (IllegalArgumentException e) {<a name="line.378"></a>
<span class="sourceLineNo">379</span> LOG.info("Call to makeQualified failed on " + path + " " + e.getMessage());<a name="line.379"></a>
<span class="sourceLineNo">380</span> return null;<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> if (!fullPath.startsWith(startPath)) {<a name="line.383"></a>
<span class="sourceLineNo">384</span> return null;<a name="line.384"></a>
<span class="sourceLineNo">385</span> }<a name="line.385"></a>
<span class="sourceLineNo">386</span><a name="line.386"></a>
<span class="sourceLineNo">387</span> final String serverNameAndFile = fullPath.substring(startPath.length());<a name="line.387"></a>
<span class="sourceLineNo">388</span><a name="line.388"></a>
<span class="sourceLineNo">389</span> if (serverNameAndFile.indexOf('/') &lt; "a,0,0".length()) {<a name="line.389"></a>
<span class="sourceLineNo">390</span> // Either it's a file (not a directory) or it's not a ServerName format<a name="line.390"></a>
<span class="sourceLineNo">391</span> return null;<a name="line.391"></a>
<span class="sourceLineNo">392</span> }<a name="line.392"></a>
<span class="sourceLineNo">393</span><a name="line.393"></a>
<span class="sourceLineNo">394</span> Path p = new Path(path);<a name="line.394"></a>
<span class="sourceLineNo">395</span> return getServerNameFromWALDirectoryName(p);<a name="line.395"></a>
<span class="sourceLineNo">396</span> }<a name="line.396"></a>
<span class="sourceLineNo">397</span><a name="line.397"></a>
<span class="sourceLineNo">398</span> /**<a name="line.398"></a>
<span class="sourceLineNo">399</span> * This function returns region server name from a log file name which is in one of the following<a name="line.399"></a>
<span class="sourceLineNo">400</span> * formats:<a name="line.400"></a>
<span class="sourceLineNo">401</span> * &lt;ul&gt;<a name="line.401"></a>
<span class="sourceLineNo">402</span> * &lt;li&gt;hdfs://&amp;lt;name node&amp;gt;/hbase/.logs/&amp;lt;server name&amp;gt;-splitting/...&lt;/li&gt;<a name="line.402"></a>
<span class="sourceLineNo">403</span> * &lt;li&gt;hdfs://&amp;lt;name node&amp;gt;/hbase/.logs/&amp;lt;server name&amp;gt;/...&lt;/li&gt;<a name="line.403"></a>
<span class="sourceLineNo">404</span> * &lt;/ul&gt;<a name="line.404"></a>
<span class="sourceLineNo">405</span> * @return null if the passed in logFile isn't a valid WAL file path<a name="line.405"></a>
<span class="sourceLineNo">406</span> */<a name="line.406"></a>
<span class="sourceLineNo">407</span> public static ServerName getServerNameFromWALDirectoryName(Path logFile) {<a name="line.407"></a>
<span class="sourceLineNo">408</span> String logDirName = logFile.getParent().getName();<a name="line.408"></a>
<span class="sourceLineNo">409</span> // We were passed the directory and not a file in it.<a name="line.409"></a>
<span class="sourceLineNo">410</span> if (logDirName.equals(HConstants.HREGION_LOGDIR_NAME)) {<a name="line.410"></a>
<span class="sourceLineNo">411</span> logDirName = logFile.getName();<a name="line.411"></a>
<span class="sourceLineNo">412</span> }<a name="line.412"></a>
<span class="sourceLineNo">413</span> ServerName serverName = null;<a name="line.413"></a>
<span class="sourceLineNo">414</span> if (logDirName.endsWith(SPLITTING_EXT)) {<a name="line.414"></a>
<span class="sourceLineNo">415</span> logDirName = logDirName.substring(0, logDirName.length() - SPLITTING_EXT.length());<a name="line.415"></a>
<span class="sourceLineNo">416</span> }<a name="line.416"></a>
<span class="sourceLineNo">417</span> try {<a name="line.417"></a>
<span class="sourceLineNo">418</span> serverName = ServerName.parseServerName(logDirName);<a name="line.418"></a>
<span class="sourceLineNo">419</span> } catch (IllegalArgumentException | IllegalStateException ex) {<a name="line.419"></a>
<span class="sourceLineNo">420</span> serverName = null;<a name="line.420"></a>
<span class="sourceLineNo">421</span> LOG.warn("Cannot parse a server name from path=" + logFile + "; " + ex.getMessage());<a name="line.421"></a>
<span class="sourceLineNo">422</span> }<a name="line.422"></a>
<span class="sourceLineNo">423</span> if (serverName != null &amp;&amp; serverName.getStartcode() &lt; 0) {<a name="line.423"></a>
<span class="sourceLineNo">424</span> LOG.warn("Invalid log file path=" + logFile);<a name="line.424"></a>
<span class="sourceLineNo">425</span> serverName = null;<a name="line.425"></a>
<span class="sourceLineNo">426</span> }<a name="line.426"></a>
<span class="sourceLineNo">427</span> return serverName;<a name="line.427"></a>
<span class="sourceLineNo">428</span> }<a name="line.428"></a>
<span class="sourceLineNo">429</span><a name="line.429"></a>
<span class="sourceLineNo">430</span> public static boolean isMetaFile(Path p) {<a name="line.430"></a>
<span class="sourceLineNo">431</span> return isMetaFile(p.getName());<a name="line.431"></a>
<span class="sourceLineNo">432</span> }<a name="line.432"></a>
<span class="sourceLineNo">433</span><a name="line.433"></a>
<span class="sourceLineNo">434</span> /** Returns True if String ends in {@link #META_WAL_PROVIDER_ID} */<a name="line.434"></a>
<span class="sourceLineNo">435</span> public static boolean isMetaFile(String p) {<a name="line.435"></a>
<span class="sourceLineNo">436</span> return p != null &amp;&amp; p.endsWith(META_WAL_PROVIDER_ID);<a name="line.436"></a>
<span class="sourceLineNo">437</span> }<a name="line.437"></a>
<span class="sourceLineNo">438</span><a name="line.438"></a>
<span class="sourceLineNo">439</span> /**<a name="line.439"></a>
<span class="sourceLineNo">440</span> * Comparator used to compare WAL files together based on their start time. Just compares start<a name="line.440"></a>
<span class="sourceLineNo">441</span> * times and nothing else.<a name="line.441"></a>
<span class="sourceLineNo">442</span> */<a name="line.442"></a>
<span class="sourceLineNo">443</span> public static class WALStartTimeComparator implements Comparator&lt;Path&gt; {<a name="line.443"></a>
<span class="sourceLineNo">444</span> @Override<a name="line.444"></a>
<span class="sourceLineNo">445</span> public int compare(Path o1, Path o2) {<a name="line.445"></a>
<span class="sourceLineNo">446</span> return Long.compare(getTS(o1), getTS(o2));<a name="line.446"></a>
<span class="sourceLineNo">447</span> }<a name="line.447"></a>
<span class="sourceLineNo">448</span><a name="line.448"></a>
<span class="sourceLineNo">449</span> /**<a name="line.449"></a>
<span class="sourceLineNo">450</span> * Split a path to get the start time For example: 10.20.20.171%3A60020.1277499063250 Could also<a name="line.450"></a>
<span class="sourceLineNo">451</span> * be a meta WAL which adds a '.meta' suffix or a synchronous replication WAL which adds a<a name="line.451"></a>
<span class="sourceLineNo">452</span> * '.syncrep' suffix. Check.<a name="line.452"></a>
<span class="sourceLineNo">453</span> * @param p path to split<a name="line.453"></a>
<span class="sourceLineNo">454</span> * @return start time<a name="line.454"></a>
<span class="sourceLineNo">455</span> */<a name="line.455"></a>
<span class="sourceLineNo">456</span> public static long getTS(Path p) {<a name="line.456"></a>
<span class="sourceLineNo">457</span> return getTimestamp(p.getName());<a name="line.457"></a>
<span class="sourceLineNo">458</span> }<a name="line.458"></a>
<span class="sourceLineNo">459</span> }<a name="line.459"></a>
<span class="sourceLineNo">460</span><a name="line.460"></a>
<span class="sourceLineNo">461</span> public static boolean isArchivedLogFile(Path p) {<a name="line.461"></a>
<span class="sourceLineNo">462</span> String oldLog = Path.SEPARATOR + HConstants.HREGION_OLDLOGDIR_NAME + Path.SEPARATOR;<a name="line.462"></a>
<span class="sourceLineNo">463</span> return p.toString().contains(oldLog);<a name="line.463"></a>
<span class="sourceLineNo">464</span> }<a name="line.464"></a>
<span class="sourceLineNo">465</span><a name="line.465"></a>
<span class="sourceLineNo">466</span> /**<a name="line.466"></a>
<span class="sourceLineNo">467</span> * Find the archived WAL file path if it is not able to locate in WALs dir.<a name="line.467"></a>
<span class="sourceLineNo">468</span> * @param path - active WAL file path<a name="line.468"></a>
<span class="sourceLineNo">469</span> * @param conf - configuration<a name="line.469"></a>
<span class="sourceLineNo">470</span> * @return archived path if exists, null - otherwise<a name="line.470"></a>
<span class="sourceLineNo">471</span> * @throws IOException exception<a name="line.471"></a>
<span class="sourceLineNo">472</span> */<a name="line.472"></a>
<span class="sourceLineNo">473</span> public static Path findArchivedLog(Path path, Configuration conf) throws IOException {<a name="line.473"></a>
<span class="sourceLineNo">474</span> // If the path contains oldWALs keyword then exit early.<a name="line.474"></a>
<span class="sourceLineNo">475</span> if (path.toString().contains(HConstants.HREGION_OLDLOGDIR_NAME)) {<a name="line.475"></a>
<span class="sourceLineNo">476</span> return null;<a name="line.476"></a>
<span class="sourceLineNo">477</span> }<a name="line.477"></a>
<span class="sourceLineNo">478</span> Path walRootDir = CommonFSUtils.getWALRootDir(conf);<a name="line.478"></a>
<span class="sourceLineNo">479</span> FileSystem fs = path.getFileSystem(conf);<a name="line.479"></a>
<span class="sourceLineNo">480</span> // Try finding the log in old dir<a name="line.480"></a>
<span class="sourceLineNo">481</span> Path oldLogDir = new Path(walRootDir, HConstants.HREGION_OLDLOGDIR_NAME);<a name="line.481"></a>
<span class="sourceLineNo">482</span> Path archivedLogLocation = new Path(oldLogDir, path.getName());<a name="line.482"></a>
<span class="sourceLineNo">483</span> if (fs.exists(archivedLogLocation)) {<a name="line.483"></a>
<span class="sourceLineNo">484</span> LOG.info("Log " + path + " was moved to " + archivedLogLocation);<a name="line.484"></a>
<span class="sourceLineNo">485</span> return archivedLogLocation;<a name="line.485"></a>
<span class="sourceLineNo">486</span> }<a name="line.486"></a>
<span class="sourceLineNo">487</span><a name="line.487"></a>
<span class="sourceLineNo">488</span> ServerName serverName = getServerNameFromWALDirectoryName(path);<a name="line.488"></a>
<span class="sourceLineNo">489</span> // Try finding the log in separate old log dir<a name="line.489"></a>
<span class="sourceLineNo">490</span> oldLogDir = new Path(walRootDir, new StringBuilder(HConstants.HREGION_OLDLOGDIR_NAME)<a name="line.490"></a>
<span class="sourceLineNo">491</span> .append(Path.SEPARATOR).append(serverName.getServerName()).toString());<a name="line.491"></a>
<span class="sourceLineNo">492</span> archivedLogLocation = new Path(oldLogDir, path.getName());<a name="line.492"></a>
<span class="sourceLineNo">493</span> if (fs.exists(archivedLogLocation)) {<a name="line.493"></a>
<span class="sourceLineNo">494</span> LOG.info("Log " + path + " was moved to " + archivedLogLocation);<a name="line.494"></a>
<span class="sourceLineNo">495</span> return archivedLogLocation;<a name="line.495"></a>
<span class="sourceLineNo">496</span> }<a name="line.496"></a>
<span class="sourceLineNo">497</span> LOG.error("Couldn't locate log: " + path);<a name="line.497"></a>
<span class="sourceLineNo">498</span> return null;<a name="line.498"></a>
<span class="sourceLineNo">499</span> }<a name="line.499"></a>
<span class="sourceLineNo">500</span><a name="line.500"></a>
<span class="sourceLineNo">501</span> /**<a name="line.501"></a>
<span class="sourceLineNo">502</span> * Opens WAL reader with retries and additional exception handling<a name="line.502"></a>
<span class="sourceLineNo">503</span> * @param path path to WAL file<a name="line.503"></a>
<span class="sourceLineNo">504</span> * @param conf configuration<a name="line.504"></a>
<span class="sourceLineNo">505</span> * @return WAL Reader instance<a name="line.505"></a>
<span class="sourceLineNo">506</span> */<a name="line.506"></a>
<span class="sourceLineNo">507</span> public static org.apache.hadoop.hbase.wal.WAL.Reader openReader(Path path, Configuration conf)<a name="line.507"></a>
<span class="sourceLineNo">508</span> throws IOException {<a name="line.508"></a>
<span class="sourceLineNo">509</span> long retryInterval = 2000; // 2 sec<a name="line.509"></a>
<span class="sourceLineNo">510</span> int maxAttempts = 30;<a name="line.510"></a>
<span class="sourceLineNo">511</span> int attempt = 0;<a name="line.511"></a>
<span class="sourceLineNo">512</span> Exception ee = null;<a name="line.512"></a>
<span class="sourceLineNo">513</span> org.apache.hadoop.hbase.wal.WAL.Reader reader = null;<a name="line.513"></a>
<span class="sourceLineNo">514</span> while (reader == null &amp;&amp; attempt++ &lt; maxAttempts) {<a name="line.514"></a>
<span class="sourceLineNo">515</span> try {<a name="line.515"></a>
<span class="sourceLineNo">516</span> // Detect if this is a new file, if so get a new reader else<a name="line.516"></a>
<span class="sourceLineNo">517</span> // reset the current reader so that we see the new data<a name="line.517"></a>
<span class="sourceLineNo">518</span> reader = WALFactory.createReader(path.getFileSystem(conf), path, conf);<a name="line.518"></a>
<span class="sourceLineNo">519</span> return reader;<a name="line.519"></a>
<span class="sourceLineNo">520</span> } catch (FileNotFoundException fnfe) {<a name="line.520"></a>
<span class="sourceLineNo">521</span> // If the log was archived, continue reading from there<a name="line.521"></a>
<span class="sourceLineNo">522</span> Path archivedLog = AbstractFSWALProvider.findArchivedLog(path, conf);<a name="line.522"></a>
<span class="sourceLineNo">523</span> // archivedLog can be null if unable to locate in archiveDir.<a name="line.523"></a>
<span class="sourceLineNo">524</span> if (archivedLog != null) {<a name="line.524"></a>
<span class="sourceLineNo">525</span> return openReader(archivedLog, conf);<a name="line.525"></a>
<span class="sourceLineNo">526</span> } else {<a name="line.526"></a>
<span class="sourceLineNo">527</span> throw fnfe;<a name="line.527"></a>
<span class="sourceLineNo">528</span> }<a name="line.528"></a>
<span class="sourceLineNo">529</span> } catch (LeaseNotRecoveredException lnre) {<a name="line.529"></a>
<span class="sourceLineNo">530</span> // HBASE-15019 the WAL was not closed due to some hiccup.<a name="line.530"></a>
<span class="sourceLineNo">531</span> LOG.warn("Try to recover the WAL lease " + path, lnre);<a name="line.531"></a>
<span class="sourceLineNo">532</span> recoverLease(conf, path);<a name="line.532"></a>
<span class="sourceLineNo">533</span> reader = null;<a name="line.533"></a>
<span class="sourceLineNo">534</span> ee = lnre;<a name="line.534"></a>
<span class="sourceLineNo">535</span> } catch (NullPointerException npe) {<a name="line.535"></a>
<span class="sourceLineNo">536</span> // Workaround for race condition in HDFS-4380<a name="line.536"></a>
<span class="sourceLineNo">537</span> // which throws a NPE if we open a file before any data node has the most recent block<a name="line.537"></a>
<span class="sourceLineNo">538</span> // Just sleep and retry. Will require re-reading compressed WALs for compressionContext.<a name="line.538"></a>
<span class="sourceLineNo">539</span> LOG.warn("Got NPE opening reader, will retry.");<a name="line.539"></a>
<span class="sourceLineNo">540</span> reader = null;<a name="line.540"></a>
<span class="sourceLineNo">541</span> ee = npe;<a name="line.541"></a>
<span class="sourceLineNo">542</span> }<a name="line.542"></a>
<span class="sourceLineNo">543</span> if (reader == null) {<a name="line.543"></a>
<span class="sourceLineNo">544</span> // sleep before next attempt<a name="line.544"></a>
<span class="sourceLineNo">545</span> try {<a name="line.545"></a>
<span class="sourceLineNo">546</span> Thread.sleep(retryInterval);<a name="line.546"></a>
<span class="sourceLineNo">547</span> } catch (InterruptedException e) {<a name="line.547"></a>
<span class="sourceLineNo">548</span> }<a name="line.548"></a>
<span class="sourceLineNo">549</span> }<a name="line.549"></a>
<span class="sourceLineNo">550</span> }<a name="line.550"></a>
<span class="sourceLineNo">551</span> throw new IOException("Could not open reader", ee);<a name="line.551"></a>
<span class="sourceLineNo">552</span> }<a name="line.552"></a>
<span class="sourceLineNo">553</span><a name="line.553"></a>
<span class="sourceLineNo">554</span> // For HBASE-15019<a name="line.554"></a>
<span class="sourceLineNo">555</span> private static void recoverLease(final Configuration conf, final Path path) {<a name="line.555"></a>
<span class="sourceLineNo">556</span> try {<a name="line.556"></a>
<span class="sourceLineNo">557</span> final FileSystem dfs = CommonFSUtils.getCurrentFileSystem(conf);<a name="line.557"></a>
<span class="sourceLineNo">558</span> RecoverLeaseFSUtils.recoverFileLease(dfs, path, conf, new CancelableProgressable() {<a name="line.558"></a>
<span class="sourceLineNo">559</span> @Override<a name="line.559"></a>
<span class="sourceLineNo">560</span> public boolean progress() {<a name="line.560"></a>
<span class="sourceLineNo">561</span> LOG.debug("Still trying to recover WAL lease: " + path);<a name="line.561"></a>
<span class="sourceLineNo">562</span> return true;<a name="line.562"></a>
<span class="sourceLineNo">563</span> }<a name="line.563"></a>
<span class="sourceLineNo">564</span> });<a name="line.564"></a>
<span class="sourceLineNo">565</span> } catch (IOException e) {<a name="line.565"></a>
<span class="sourceLineNo">566</span> LOG.warn("unable to recover lease for WAL: " + path, e);<a name="line.566"></a>
<span class="sourceLineNo">567</span> }<a name="line.567"></a>
<span class="sourceLineNo">568</span> }<a name="line.568"></a>
<span class="sourceLineNo">569</span><a name="line.569"></a>
<span class="sourceLineNo">570</span> @Override<a name="line.570"></a>
<span class="sourceLineNo">571</span> public void addWALActionsListener(WALActionsListener listener) {<a name="line.571"></a>
<span class="sourceLineNo">572</span> listeners.add(listener);<a name="line.572"></a>
<span class="sourceLineNo">573</span> }<a name="line.573"></a>
<span class="sourceLineNo">574</span><a name="line.574"></a>
<span class="sourceLineNo">575</span> private static String getWALNameGroupFromWALName(String name, int group) {<a name="line.575"></a>
<span class="sourceLineNo">576</span> Matcher matcher = WAL_FILE_NAME_PATTERN.matcher(name);<a name="line.576"></a>
<span class="sourceLineNo">577</span> if (matcher.matches()) {<a name="line.577"></a>
<span class="sourceLineNo">578</span> return matcher.group(group);<a name="line.578"></a>
<span class="sourceLineNo">579</span> } else {<a name="line.579"></a>
<span class="sourceLineNo">580</span> throw new IllegalArgumentException(name + " is not a valid wal file name");<a name="line.580"></a>
<span class="sourceLineNo">581</span> }<a name="line.581"></a>
<span class="sourceLineNo">582</span> }<a name="line.582"></a>
<span class="sourceLineNo">583</span><a name="line.583"></a>
<span class="sourceLineNo">584</span> /**<a name="line.584"></a>
<span class="sourceLineNo">585</span> * Get prefix of the log from its name, assuming WAL name in format of<a name="line.585"></a>
<span class="sourceLineNo">586</span> * log_prefix.filenumber.log_suffix<a name="line.586"></a>
<span class="sourceLineNo">587</span> * @param name Name of the WAL to parse<a name="line.587"></a>
<span class="sourceLineNo">588</span> * @return prefix of the log<a name="line.588"></a>
<span class="sourceLineNo">589</span> * @throws IllegalArgumentException if the name passed in is not a valid wal file name<a name="line.589"></a>
<span class="sourceLineNo">590</span> * @see AbstractFSWAL#getCurrentFileName()<a name="line.590"></a>
<span class="sourceLineNo">591</span> */<a name="line.591"></a>
<span class="sourceLineNo">592</span> public static String getWALPrefixFromWALName(String name) {<a name="line.592"></a>
<span class="sourceLineNo">593</span> return getWALNameGroupFromWALName(name, 1);<a name="line.593"></a>
<span class="sourceLineNo">594</span> }<a name="line.594"></a>
<span class="sourceLineNo">595</span>}<a name="line.595"></a>
</pre>
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