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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> *<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> *<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.replication.regionserver;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.Closeable;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.io.FileNotFoundException;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.io.IOException;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.OptionalLong;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.concurrent.PriorityBlockingQueue;<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.FileStatus;<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.ServerName;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.regionserver.wal.ProtobufLogReader;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.util.CancelableProgressable;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.util.CommonFSUtils;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.util.LeaseNotRecoveredException;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.util.RecoverLeaseFSUtils;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.wal.WAL.Entry;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.wal.WAL.Reader;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.wal.WALFactory;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.hadoop.ipc.RemoteException;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.slf4j.Logger;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.slf4j.LoggerFactory;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span>/**<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * Streaming access to WAL entries. This class is given a queue of WAL {@link Path}, and continually<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * iterates through all the WAL {@link Entry} in the queue. When it's done reading from a Path, it<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * dequeues it and starts reading from the next.<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> */<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>@InterfaceAudience.Private<a name="line.51"></a> |
| <span class="sourceLineNo">052</span>@InterfaceStability.Evolving<a name="line.52"></a> |
| <span class="sourceLineNo">053</span>class WALEntryStream implements Closeable {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> private static final Logger LOG = LoggerFactory.getLogger(WALEntryStream.class);<a name="line.54"></a> |
| <span class="sourceLineNo">055</span><a name="line.55"></a> |
| <span class="sourceLineNo">056</span> private Reader reader;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> private Path currentPath;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> // cache of next entry for hasNext()<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> private Entry currentEntry;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> // position for the current entry. As now we support peek, which means that the upper layer may<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> // choose to return before reading the current entry, so it is not safe to return the value below<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> // in getPosition.<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> private long currentPositionOfEntry = 0;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> // position after reading current entry<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> private long currentPositionOfReader = 0;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> private final PriorityBlockingQueue<Path> logQueue;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> private final FileSystem fs;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> private final Configuration conf;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> private final WALFileLengthProvider walFileLengthProvider;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> // which region server the WALs belong to<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> private final ServerName serverName;<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> private final MetricsSource metrics;<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> * Create an entry stream over the given queue at the given start position<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * @param logQueue the queue of WAL paths<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * @param conf the {@link Configuration} to use to create {@link Reader} for this stream<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * @param startPosition the position in the first WAL to start reading at<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> * @param walFileLengthProvider provides the length of the WAL file<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * @param serverName the server name which all WALs belong to<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * @param metrics the replication metrics<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * @throws IOException<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> */<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> public WALEntryStream(PriorityBlockingQueue<Path> logQueue, Configuration conf,<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> long startPosition, WALFileLengthProvider walFileLengthProvider, ServerName serverName,<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> MetricsSource metrics) throws IOException {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> this.logQueue = logQueue;<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> this.fs = CommonFSUtils.getWALFileSystem(conf);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> this.conf = conf;<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> this.currentPositionOfEntry = startPosition;<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> this.walFileLengthProvider = walFileLengthProvider;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> this.serverName = serverName;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> this.metrics = metrics;<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 true if there is another WAL {@link Entry}<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> */<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> public boolean hasNext() throws IOException {<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> if (currentEntry == null) {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> tryAdvanceEntry();<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> return currentEntry != null;<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> }<a name="line.104"></a> |
| <span class="sourceLineNo">105</span><a name="line.105"></a> |
| <span class="sourceLineNo">106</span> /**<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * Returns the next WAL entry in this stream but does not advance.<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> */<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> public Entry peek() throws IOException {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> return hasNext() ? currentEntry: null;<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> }<a name="line.111"></a> |
| <span class="sourceLineNo">112</span><a name="line.112"></a> |
| <span class="sourceLineNo">113</span> /**<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> * Returns the next WAL entry in this stream and advance the stream.<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> */<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> public Entry next() throws IOException {<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> Entry save = peek();<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> currentPositionOfEntry = currentPositionOfReader;<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> currentEntry = null;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> return save;<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> /**<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> * {@inheritDoc}<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> */<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> @Override<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> public void close() throws IOException {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> closeReader();<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> /**<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * @return the position of the last Entry returned by next()<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> */<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> public long getPosition() {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> return currentPositionOfEntry;<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> /**<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> * @return the {@link Path} of the current WAL<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> */<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> public Path getCurrentPath() {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> return currentPath;<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> private String getCurrentPathStat() {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> StringBuilder sb = new StringBuilder();<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> if (currentPath != null) {<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> sb.append("currently replicating from: ").append(currentPath).append(" at position: ")<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> .append(currentPositionOfEntry).append("\n");<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> } else {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> sb.append("no replication ongoing, waiting for new log");<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> return sb.toString();<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> /**<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> * Should be called if the stream is to be reused (i.e. used again after hasNext() has returned<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> * false)<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> */<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> public void reset() throws IOException {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> if (reader != null && currentPath != null) {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> resetReader();<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> }<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> private void setPosition(long position) {<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> currentPositionOfEntry = position;<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> private void setCurrentPath(Path path) {<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> this.currentPath = path;<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> private void tryAdvanceEntry() throws IOException {<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> if (checkReader()) {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> boolean beingWritten = readNextEntryAndRecordReaderPosition();<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> LOG.trace("Reading WAL {}; currently open for write={}", this.currentPath, beingWritten);<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> if (currentEntry == null && !beingWritten) {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> // no more entries in this log file, and the file is already closed, i.e, rolled<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> // Before dequeueing, we should always get one more attempt at reading.<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> // This is in case more entries came in after we opened the reader, and the log is rolled<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> // while we were reading. See HBASE-6758<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> resetReader();<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> readNextEntryAndRecordReaderPosition();<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> if (currentEntry == null) {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> if (checkAllBytesParsed()) { // now we're certain we're done with this log file<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> dequeueCurrentLog();<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> if (openNextLog()) {<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> readNextEntryAndRecordReaderPosition();<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> }<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> // if currentEntry != null then just return<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> // if currentEntry == null but the file is still being written, then we should not switch to<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> // the next log either, just return here and try next time to see if there are more entries in<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> // the current file<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> }<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> // do nothing if we don't have a WAL Reader (e.g. if there's no logs in queue)<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> }<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> // HBASE-15984 check to see we have in fact parsed all data in a cleanly closed file<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> private boolean checkAllBytesParsed() throws IOException {<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> // -1 means the wal wasn't closed cleanly.<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> final long trailerSize = currentTrailerSize();<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> FileStatus stat = null;<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> try {<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> stat = fs.getFileStatus(this.currentPath);<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> } catch (IOException exception) {<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> LOG.warn("Couldn't get file length information about log {}, it {} closed cleanly {}",<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> currentPath, trailerSize < 0 ? "was not" : "was", getCurrentPathStat());<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> metrics.incrUnknownFileLengthForClosedWAL();<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> }<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> // Here we use currentPositionOfReader instead of currentPositionOfEntry.<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> // We only call this method when currentEntry is null so usually they are the same, but there<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> // are two exceptions. One is we have nothing in the file but only a header, in this way<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> // the currentPositionOfEntry will always be 0 since we have no change to update it. The other<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> // is that we reach the end of file, then currentPositionOfEntry will point to the tail of the<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> // last valid entry, and the currentPositionOfReader will usually point to the end of the file.<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> if (stat != null) {<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> if (trailerSize < 0) {<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> if (currentPositionOfReader < stat.getLen()) {<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> final long skippedBytes = stat.getLen() - currentPositionOfReader;<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> LOG.debug(<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> "Reached the end of WAL {}. It was not closed cleanly," +<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> " so we did not parse {} bytes of data. This is normally ok.",<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> currentPath, skippedBytes);<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> metrics.incrUncleanlyClosedWALs();<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> metrics.incrBytesSkippedInUncleanlyClosedWALs(skippedBytes);<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> }<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> } else if (currentPositionOfReader + trailerSize < stat.getLen()) {<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> LOG.warn(<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> "Processing end of WAL {} at position {}, which is too far away from" +<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> " reported file length {}. Restarting WAL reading (see HBASE-15983 for details). {}",<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> currentPath, currentPositionOfReader, stat.getLen(), getCurrentPathStat());<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> setPosition(0);<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> resetReader();<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> metrics.incrRestartedWALReading();<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> metrics.incrRepeatedFileBytes(currentPositionOfReader);<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> return false;<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> }<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> }<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> if (LOG.isTraceEnabled()) {<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> LOG.trace("Reached the end of " + this.currentPath + " and length of the file is " +<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> (stat == null ? "N/A" : stat.getLen()));<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> }<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> metrics.incrCompletedWAL();<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> return true;<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> }<a name="line.249"></a> |
| <span class="sourceLineNo">250</span><a name="line.250"></a> |
| <span class="sourceLineNo">251</span> private void dequeueCurrentLog() throws IOException {<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> LOG.debug("EOF, closing {}", currentPath);<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> closeReader();<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> logQueue.remove();<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> setPosition(0);<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> metrics.decrSizeOfLogQueue();<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<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> * Returns whether the file is opened for writing.<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> */<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> private boolean readNextEntryAndRecordReaderPosition() throws IOException {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> Entry readEntry = reader.next();<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> long readerPos = reader.getPosition();<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> OptionalLong fileLength = walFileLengthProvider.getLogFileSizeIfBeingWritten(currentPath);<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> if (fileLength.isPresent() && readerPos > fileLength.getAsLong()) {<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> // See HBASE-14004, for AsyncFSWAL which uses fan-out, it is possible that we read uncommitted<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> // data, so we need to make sure that we do not read beyond the committed file length.<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> if (LOG.isDebugEnabled()) {<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> LOG.debug("The provider tells us the valid length for " + currentPath + " is " +<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> fileLength.getAsLong() + ", but we have advanced to " + readerPos);<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> }<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> resetReader();<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> return true;<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> }<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> if (readEntry != null) {<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> LOG.trace("reading entry: {} ", readEntry);<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> metrics.incrLogEditsRead();<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> metrics.incrLogReadInBytes(readerPos - currentPositionOfEntry);<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> }<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> currentEntry = readEntry; // could be null<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> this.currentPositionOfReader = readerPos;<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> return fileLength.isPresent();<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> }<a name="line.284"></a> |
| <span class="sourceLineNo">285</span><a name="line.285"></a> |
| <span class="sourceLineNo">286</span> private void closeReader() throws IOException {<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> if (reader != null) {<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> reader.close();<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> reader = null;<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> }<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> }<a name="line.291"></a> |
| <span class="sourceLineNo">292</span><a name="line.292"></a> |
| <span class="sourceLineNo">293</span> // if we don't have a reader, open a reader on the next log<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> private boolean checkReader() throws IOException {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> if (reader == null) {<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> return openNextLog();<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> }<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> return true;<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> }<a name="line.299"></a> |
| <span class="sourceLineNo">300</span><a name="line.300"></a> |
| <span class="sourceLineNo">301</span> // open a reader on the next log in queue<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> private boolean openNextLog() throws IOException {<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> Path nextPath = logQueue.peek();<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> if (nextPath != null) {<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> openReader(nextPath);<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> if (reader != null) {<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> return true;<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> }<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> } else {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> // no more files in queue, this could happen for recovered queue, or for a wal group of a sync<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> // replication peer which has already been transited to DA or S.<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> setCurrentPath(null);<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> }<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> return false;<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> }<a name="line.315"></a> |
| <span class="sourceLineNo">316</span><a name="line.316"></a> |
| <span class="sourceLineNo">317</span> private Path getArchivedLog(Path path) throws IOException {<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> Path walRootDir = CommonFSUtils.getWALRootDir(conf);<a name="line.318"></a> |
| <span class="sourceLineNo">319</span><a name="line.319"></a> |
| <span class="sourceLineNo">320</span> // Try found the log in old dir<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> Path oldLogDir = new Path(walRootDir, HConstants.HREGION_OLDLOGDIR_NAME);<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> Path archivedLogLocation = new Path(oldLogDir, path.getName());<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> if (fs.exists(archivedLogLocation)) {<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> LOG.info("Log " + path + " was moved to " + archivedLogLocation);<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> return archivedLogLocation;<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> }<a name="line.326"></a> |
| <span class="sourceLineNo">327</span><a name="line.327"></a> |
| <span class="sourceLineNo">328</span> // Try found the log in the seperate old log dir<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> oldLogDir =<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> new Path(walRootDir, new StringBuilder(HConstants.HREGION_OLDLOGDIR_NAME)<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> .append(Path.SEPARATOR).append(serverName.getServerName()).toString());<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> archivedLogLocation = new Path(oldLogDir, path.getName());<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> if (fs.exists(archivedLogLocation)) {<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> LOG.info("Log " + path + " was moved to " + archivedLogLocation);<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> return archivedLogLocation;<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> }<a name="line.336"></a> |
| <span class="sourceLineNo">337</span><a name="line.337"></a> |
| <span class="sourceLineNo">338</span> LOG.error("Couldn't locate log: " + path);<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> return path;<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> private void handleFileNotFound(Path path, FileNotFoundException fnfe) throws IOException {<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> // If the log was archived, continue reading from there<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> Path archivedLog = getArchivedLog(path);<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> if (!path.equals(archivedLog)) {<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> openReader(archivedLog);<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> } else {<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> throw fnfe;<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> }<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> }<a name="line.350"></a> |
| <span class="sourceLineNo">351</span><a name="line.351"></a> |
| <span class="sourceLineNo">352</span> private void openReader(Path path) throws IOException {<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> try {<a name="line.353"></a> |
| <span class="sourceLineNo">354</span> // Detect if this is a new file, if so get a new reader else<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> // reset the current reader so that we see the new data<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> if (reader == null || !getCurrentPath().equals(path)) {<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> closeReader();<a name="line.357"></a> |
| <span class="sourceLineNo">358</span> reader = WALFactory.createReader(fs, path, conf);<a name="line.358"></a> |
| <span class="sourceLineNo">359</span> seek();<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> setCurrentPath(path);<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> } else {<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> resetReader();<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> }<a name="line.363"></a> |
| <span class="sourceLineNo">364</span> } catch (FileNotFoundException fnfe) {<a name="line.364"></a> |
| <span class="sourceLineNo">365</span> handleFileNotFound(path, fnfe);<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> } catch (RemoteException re) {<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> IOException ioe = re.unwrapRemoteException(FileNotFoundException.class);<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> if (!(ioe instanceof FileNotFoundException)) throw ioe;<a name="line.368"></a> |
| <span class="sourceLineNo">369</span> handleFileNotFound(path, (FileNotFoundException)ioe);<a name="line.369"></a> |
| <span class="sourceLineNo">370</span> } catch (LeaseNotRecoveredException lnre) {<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> // HBASE-15019 the WAL was not closed due to some hiccup.<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> LOG.warn("Try to recover the WAL lease " + currentPath, lnre);<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> recoverLease(conf, currentPath);<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> reader = null;<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> } catch (NullPointerException npe) {<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> // Workaround for race condition in HDFS-4380<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> // which throws a NPE if we open a file before any data node has the most recent block<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> // Just sleep and retry. Will require re-reading compressed WALs for compressionContext.<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> LOG.warn("Got NPE opening reader, will retry.");<a name="line.379"></a> |
| <span class="sourceLineNo">380</span> reader = 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><a name="line.383"></a> |
| <span class="sourceLineNo">384</span> // For HBASE-15019<a name="line.384"></a> |
| <span class="sourceLineNo">385</span> private void recoverLease(final Configuration conf, final Path path) {<a name="line.385"></a> |
| <span class="sourceLineNo">386</span> try {<a name="line.386"></a> |
| <span class="sourceLineNo">387</span> final FileSystem dfs = CommonFSUtils.getWALFileSystem(conf);<a name="line.387"></a> |
| <span class="sourceLineNo">388</span> RecoverLeaseFSUtils.recoverFileLease(dfs, path, conf, new CancelableProgressable() {<a name="line.388"></a> |
| <span class="sourceLineNo">389</span> @Override<a name="line.389"></a> |
| <span class="sourceLineNo">390</span> public boolean progress() {<a name="line.390"></a> |
| <span class="sourceLineNo">391</span> LOG.debug("recover WAL lease: " + path);<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> return true;<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> }<a name="line.393"></a> |
| <span class="sourceLineNo">394</span> });<a name="line.394"></a> |
| <span class="sourceLineNo">395</span> } catch (IOException e) {<a name="line.395"></a> |
| <span class="sourceLineNo">396</span> LOG.warn("unable to recover lease for WAL: " + path, e);<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><a name="line.399"></a> |
| <span class="sourceLineNo">400</span> private void resetReader() throws IOException {<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> try {<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> currentEntry = null;<a name="line.402"></a> |
| <span class="sourceLineNo">403</span> reader.reset();<a name="line.403"></a> |
| <span class="sourceLineNo">404</span> seek();<a name="line.404"></a> |
| <span class="sourceLineNo">405</span> } catch (FileNotFoundException fnfe) {<a name="line.405"></a> |
| <span class="sourceLineNo">406</span> // If the log was archived, continue reading from there<a name="line.406"></a> |
| <span class="sourceLineNo">407</span> Path archivedLog = getArchivedLog(currentPath);<a name="line.407"></a> |
| <span class="sourceLineNo">408</span> if (!currentPath.equals(archivedLog)) {<a name="line.408"></a> |
| <span class="sourceLineNo">409</span> openReader(archivedLog);<a name="line.409"></a> |
| <span class="sourceLineNo">410</span> } else {<a name="line.410"></a> |
| <span class="sourceLineNo">411</span> throw fnfe;<a name="line.411"></a> |
| <span class="sourceLineNo">412</span> }<a name="line.412"></a> |
| <span class="sourceLineNo">413</span> } catch (NullPointerException npe) {<a name="line.413"></a> |
| <span class="sourceLineNo">414</span> throw new IOException("NPE resetting reader, likely HDFS-4380", npe);<a name="line.414"></a> |
| <span class="sourceLineNo">415</span> }<a name="line.415"></a> |
| <span class="sourceLineNo">416</span> }<a name="line.416"></a> |
| <span class="sourceLineNo">417</span><a name="line.417"></a> |
| <span class="sourceLineNo">418</span> private void seek() throws IOException {<a name="line.418"></a> |
| <span class="sourceLineNo">419</span> if (currentPositionOfEntry != 0) {<a name="line.419"></a> |
| <span class="sourceLineNo">420</span> reader.seek(currentPositionOfEntry);<a name="line.420"></a> |
| <span class="sourceLineNo">421</span> }<a name="line.421"></a> |
| <span class="sourceLineNo">422</span> }<a name="line.422"></a> |
| <span class="sourceLineNo">423</span><a name="line.423"></a> |
| <span class="sourceLineNo">424</span> private long currentTrailerSize() {<a name="line.424"></a> |
| <span class="sourceLineNo">425</span> long size = -1L;<a name="line.425"></a> |
| <span class="sourceLineNo">426</span> if (reader instanceof ProtobufLogReader) {<a name="line.426"></a> |
| <span class="sourceLineNo">427</span> final ProtobufLogReader pblr = (ProtobufLogReader) reader;<a name="line.427"></a> |
| <span class="sourceLineNo">428</span> size = pblr.trailerSize();<a name="line.428"></a> |
| <span class="sourceLineNo">429</span> }<a name="line.429"></a> |
| <span class="sourceLineNo">430</span> return size;<a name="line.430"></a> |
| <span class="sourceLineNo">431</span> }<a name="line.431"></a> |
| <span class="sourceLineNo">432</span>}<a name="line.432"></a> |
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| </html> |
