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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 static org.apache.hadoop.hbase.wal.WALSplitUtil.getCompletedRecoveredEditsFilePath;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.wal.WALSplitUtil.getRegionSplitEditsPath;<a name="line.21"></a>
<span class="sourceLineNo">022</span><a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.io.EOFException;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.io.IOException;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.ArrayList;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.List;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.Map;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.concurrent.ConcurrentMap;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.fs.Path;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.Cell;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.CellUtil;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.TableName;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.log.HBaseMarkers;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.ipc.RemoteException;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.slf4j.Logger;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.slf4j.LoggerFactory;<a name="line.39"></a>
<span class="sourceLineNo">040</span><a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.apache.hbase.thirdparty.org.apache.commons.collections4.MapUtils;<a name="line.41"></a>
<span class="sourceLineNo">042</span><a name="line.42"></a>
<span class="sourceLineNo">043</span>@InterfaceAudience.Private<a name="line.43"></a>
<span class="sourceLineNo">044</span>abstract class AbstractRecoveredEditsOutputSink extends OutputSink {<a name="line.44"></a>
<span class="sourceLineNo">045</span> private static final Logger LOG = LoggerFactory.getLogger(RecoveredEditsOutputSink.class);<a name="line.45"></a>
<span class="sourceLineNo">046</span> private final WALSplitter walSplitter;<a name="line.46"></a>
<span class="sourceLineNo">047</span> private final ConcurrentMap&lt;String, Long&gt; regionMaximumEditLogSeqNum = new ConcurrentHashMap&lt;&gt;();<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span> public AbstractRecoveredEditsOutputSink(WALSplitter walSplitter,<a name="line.49"></a>
<span class="sourceLineNo">050</span> WALSplitter.PipelineController controller, EntryBuffers entryBuffers, int numWriters) {<a name="line.50"></a>
<span class="sourceLineNo">051</span> super(controller, entryBuffers, numWriters);<a name="line.51"></a>
<span class="sourceLineNo">052</span> this.walSplitter = walSplitter;<a name="line.52"></a>
<span class="sourceLineNo">053</span> }<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span> /** Returns a writer that wraps a {@link WALProvider.Writer} and its Path. Caller should close. */<a name="line.55"></a>
<span class="sourceLineNo">056</span> protected RecoveredEditsWriter createRecoveredEditsWriter(TableName tableName, byte[] region,<a name="line.56"></a>
<span class="sourceLineNo">057</span> long seqId) throws IOException {<a name="line.57"></a>
<span class="sourceLineNo">058</span> Path regionEditsPath = getRegionSplitEditsPath(tableName, region, seqId,<a name="line.58"></a>
<span class="sourceLineNo">059</span> walSplitter.getFileBeingSplit().getPath().getName(), walSplitter.getTmpDirName(),<a name="line.59"></a>
<span class="sourceLineNo">060</span> walSplitter.conf);<a name="line.60"></a>
<span class="sourceLineNo">061</span> if (walSplitter.walFS.exists(regionEditsPath)) {<a name="line.61"></a>
<span class="sourceLineNo">062</span> LOG.warn("Found old edits file. It could be the "<a name="line.62"></a>
<span class="sourceLineNo">063</span> + "result of a previous failed split attempt. Deleting " + regionEditsPath + ", length="<a name="line.63"></a>
<span class="sourceLineNo">064</span> + walSplitter.walFS.getFileStatus(regionEditsPath).getLen());<a name="line.64"></a>
<span class="sourceLineNo">065</span> if (!walSplitter.walFS.delete(regionEditsPath, false)) {<a name="line.65"></a>
<span class="sourceLineNo">066</span> LOG.warn("Failed delete of old {}", regionEditsPath);<a name="line.66"></a>
<span class="sourceLineNo">067</span> }<a name="line.67"></a>
<span class="sourceLineNo">068</span> }<a name="line.68"></a>
<span class="sourceLineNo">069</span> WALProvider.Writer w = walSplitter.createWriter(regionEditsPath);<a name="line.69"></a>
<span class="sourceLineNo">070</span> final String msg = "Creating recovered edits writer path=" + regionEditsPath;<a name="line.70"></a>
<span class="sourceLineNo">071</span> LOG.info(msg);<a name="line.71"></a>
<span class="sourceLineNo">072</span> updateStatusWithMsg(msg);<a name="line.72"></a>
<span class="sourceLineNo">073</span> return new RecoveredEditsWriter(region, regionEditsPath, w, seqId);<a name="line.73"></a>
<span class="sourceLineNo">074</span> }<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span> protected Path closeRecoveredEditsWriter(RecoveredEditsWriter editsWriter,<a name="line.76"></a>
<span class="sourceLineNo">077</span> List&lt;IOException&gt; thrown) throws IOException {<a name="line.77"></a>
<span class="sourceLineNo">078</span> try {<a name="line.78"></a>
<span class="sourceLineNo">079</span> editsWriter.writer.close();<a name="line.79"></a>
<span class="sourceLineNo">080</span> } catch (IOException ioe) {<a name="line.80"></a>
<span class="sourceLineNo">081</span> final String errorMsg = "Could not close recovered edits at " + editsWriter.path;<a name="line.81"></a>
<span class="sourceLineNo">082</span> LOG.error(errorMsg, ioe);<a name="line.82"></a>
<span class="sourceLineNo">083</span> updateStatusWithMsg(errorMsg);<a name="line.83"></a>
<span class="sourceLineNo">084</span> thrown.add(ioe);<a name="line.84"></a>
<span class="sourceLineNo">085</span> return null;<a name="line.85"></a>
<span class="sourceLineNo">086</span> }<a name="line.86"></a>
<span class="sourceLineNo">087</span> final String msg = "Closed recovered edits writer path=" + editsWriter.path + " (wrote "<a name="line.87"></a>
<span class="sourceLineNo">088</span> + editsWriter.editsWritten + " edits, skipped " + editsWriter.editsSkipped + " edits in "<a name="line.88"></a>
<span class="sourceLineNo">089</span> + (editsWriter.nanosSpent / 1000 / 1000) + " ms)";<a name="line.89"></a>
<span class="sourceLineNo">090</span> LOG.info(msg);<a name="line.90"></a>
<span class="sourceLineNo">091</span> updateStatusWithMsg(msg);<a name="line.91"></a>
<span class="sourceLineNo">092</span> if (editsWriter.editsWritten == 0) {<a name="line.92"></a>
<span class="sourceLineNo">093</span> // just remove the empty recovered.edits file<a name="line.93"></a>
<span class="sourceLineNo">094</span> if (<a name="line.94"></a>
<span class="sourceLineNo">095</span> walSplitter.walFS.exists(editsWriter.path)<a name="line.95"></a>
<span class="sourceLineNo">096</span> &amp;&amp; !walSplitter.walFS.delete(editsWriter.path, false)<a name="line.96"></a>
<span class="sourceLineNo">097</span> ) {<a name="line.97"></a>
<span class="sourceLineNo">098</span> final String errorMsg = "Failed deleting empty " + editsWriter.path;<a name="line.98"></a>
<span class="sourceLineNo">099</span> LOG.warn(errorMsg);<a name="line.99"></a>
<span class="sourceLineNo">100</span> updateStatusWithMsg(errorMsg);<a name="line.100"></a>
<span class="sourceLineNo">101</span> throw new IOException("Failed deleting empty " + editsWriter.path);<a name="line.101"></a>
<span class="sourceLineNo">102</span> }<a name="line.102"></a>
<span class="sourceLineNo">103</span> return 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> Path dst = getCompletedRecoveredEditsFilePath(editsWriter.path,<a name="line.106"></a>
<span class="sourceLineNo">107</span> regionMaximumEditLogSeqNum.get(Bytes.toString(editsWriter.encodedRegionName)));<a name="line.107"></a>
<span class="sourceLineNo">108</span> try {<a name="line.108"></a>
<span class="sourceLineNo">109</span> if (!dst.equals(editsWriter.path) &amp;&amp; walSplitter.walFS.exists(dst)) {<a name="line.109"></a>
<span class="sourceLineNo">110</span> deleteOneWithFewerEntries(editsWriter, dst);<a name="line.110"></a>
<span class="sourceLineNo">111</span> }<a name="line.111"></a>
<span class="sourceLineNo">112</span> // Skip the unit tests which create a splitter that reads and<a name="line.112"></a>
<span class="sourceLineNo">113</span> // writes the data without touching disk.<a name="line.113"></a>
<span class="sourceLineNo">114</span> // TestHLogSplit#testThreading is an example.<a name="line.114"></a>
<span class="sourceLineNo">115</span> if (walSplitter.walFS.exists(editsWriter.path)) {<a name="line.115"></a>
<span class="sourceLineNo">116</span> if (!walSplitter.walFS.rename(editsWriter.path, dst)) {<a name="line.116"></a>
<span class="sourceLineNo">117</span> final String errorMsg =<a name="line.117"></a>
<span class="sourceLineNo">118</span> "Failed renaming recovered edits " + editsWriter.path + " to " + dst;<a name="line.118"></a>
<span class="sourceLineNo">119</span> updateStatusWithMsg(errorMsg);<a name="line.119"></a>
<span class="sourceLineNo">120</span> throw new IOException(errorMsg);<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span> final String renameEditMsg = "Rename recovered edits " + editsWriter.path + " to " + dst;<a name="line.122"></a>
<span class="sourceLineNo">123</span> LOG.info(renameEditMsg);<a name="line.123"></a>
<span class="sourceLineNo">124</span> updateStatusWithMsg(renameEditMsg);<a name="line.124"></a>
<span class="sourceLineNo">125</span> }<a name="line.125"></a>
<span class="sourceLineNo">126</span> } catch (IOException ioe) {<a name="line.126"></a>
<span class="sourceLineNo">127</span> final String errorMsg = "Could not rename recovered edits " + editsWriter.path + " to " + dst;<a name="line.127"></a>
<span class="sourceLineNo">128</span> LOG.error(errorMsg, ioe);<a name="line.128"></a>
<span class="sourceLineNo">129</span> updateStatusWithMsg(errorMsg);<a name="line.129"></a>
<span class="sourceLineNo">130</span> thrown.add(ioe);<a name="line.130"></a>
<span class="sourceLineNo">131</span> return null;<a name="line.131"></a>
<span class="sourceLineNo">132</span> }<a name="line.132"></a>
<span class="sourceLineNo">133</span> return dst;<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span><a name="line.135"></a>
<span class="sourceLineNo">136</span> @Override<a name="line.136"></a>
<span class="sourceLineNo">137</span> public boolean keepRegionEvent(WAL.Entry entry) {<a name="line.137"></a>
<span class="sourceLineNo">138</span> ArrayList&lt;Cell&gt; cells = entry.getEdit().getCells();<a name="line.138"></a>
<span class="sourceLineNo">139</span> for (Cell cell : cells) {<a name="line.139"></a>
<span class="sourceLineNo">140</span> if (WALEdit.isCompactionMarker(cell)) {<a name="line.140"></a>
<span class="sourceLineNo">141</span> return true;<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> return false;<a name="line.144"></a>
<span class="sourceLineNo">145</span> }<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span> /**<a name="line.147"></a>
<span class="sourceLineNo">148</span> * Update region's maximum edit log SeqNum.<a name="line.148"></a>
<span class="sourceLineNo">149</span> */<a name="line.149"></a>
<span class="sourceLineNo">150</span> void updateRegionMaximumEditLogSeqNum(WAL.Entry entry) {<a name="line.150"></a>
<span class="sourceLineNo">151</span> synchronized (regionMaximumEditLogSeqNum) {<a name="line.151"></a>
<span class="sourceLineNo">152</span> String regionName = Bytes.toString(entry.getKey().getEncodedRegionName());<a name="line.152"></a>
<span class="sourceLineNo">153</span> Long currentMaxSeqNum = regionMaximumEditLogSeqNum.get(regionName);<a name="line.153"></a>
<span class="sourceLineNo">154</span> if (currentMaxSeqNum == null || entry.getKey().getSequenceId() &gt; currentMaxSeqNum) {<a name="line.154"></a>
<span class="sourceLineNo">155</span> regionMaximumEditLogSeqNum.put(regionName, entry.getKey().getSequenceId());<a name="line.155"></a>
<span class="sourceLineNo">156</span> }<a name="line.156"></a>
<span class="sourceLineNo">157</span> }<a name="line.157"></a>
<span class="sourceLineNo">158</span> }<a name="line.158"></a>
<span class="sourceLineNo">159</span><a name="line.159"></a>
<span class="sourceLineNo">160</span> // delete the one with fewer wal entries<a name="line.160"></a>
<span class="sourceLineNo">161</span> private void deleteOneWithFewerEntries(RecoveredEditsWriter editsWriter, Path dst)<a name="line.161"></a>
<span class="sourceLineNo">162</span> throws IOException {<a name="line.162"></a>
<span class="sourceLineNo">163</span> long dstMinLogSeqNum = -1L;<a name="line.163"></a>
<span class="sourceLineNo">164</span> try (WALStreamReader reader =<a name="line.164"></a>
<span class="sourceLineNo">165</span> walSplitter.getWalFactory().createStreamReader(walSplitter.walFS, dst)) {<a name="line.165"></a>
<span class="sourceLineNo">166</span> WAL.Entry entry = reader.next();<a name="line.166"></a>
<span class="sourceLineNo">167</span> if (entry != null) {<a name="line.167"></a>
<span class="sourceLineNo">168</span> dstMinLogSeqNum = entry.getKey().getSequenceId();<a name="line.168"></a>
<span class="sourceLineNo">169</span> }<a name="line.169"></a>
<span class="sourceLineNo">170</span> } catch (EOFException e) {<a name="line.170"></a>
<span class="sourceLineNo">171</span> LOG.debug("Got EOF when reading first WAL entry from {}, an empty or broken WAL file?", dst,<a name="line.171"></a>
<span class="sourceLineNo">172</span> e);<a name="line.172"></a>
<span class="sourceLineNo">173</span> }<a name="line.173"></a>
<span class="sourceLineNo">174</span> if (editsWriter.minLogSeqNum &lt; dstMinLogSeqNum) {<a name="line.174"></a>
<span class="sourceLineNo">175</span> LOG.warn("Found existing old edits file. It could be the result of a previous failed"<a name="line.175"></a>
<span class="sourceLineNo">176</span> + " split attempt or we have duplicated wal entries. Deleting " + dst + ", length="<a name="line.176"></a>
<span class="sourceLineNo">177</span> + walSplitter.walFS.getFileStatus(dst).getLen());<a name="line.177"></a>
<span class="sourceLineNo">178</span> if (!walSplitter.walFS.delete(dst, false)) {<a name="line.178"></a>
<span class="sourceLineNo">179</span> LOG.warn("Failed deleting of old {}", dst);<a name="line.179"></a>
<span class="sourceLineNo">180</span> throw new IOException("Failed deleting of old " + dst);<a name="line.180"></a>
<span class="sourceLineNo">181</span> }<a name="line.181"></a>
<span class="sourceLineNo">182</span> } else {<a name="line.182"></a>
<span class="sourceLineNo">183</span> LOG<a name="line.183"></a>
<span class="sourceLineNo">184</span> .warn("Found existing old edits file and we have less entries. Deleting " + editsWriter.path<a name="line.184"></a>
<span class="sourceLineNo">185</span> + ", length=" + walSplitter.walFS.getFileStatus(editsWriter.path).getLen());<a name="line.185"></a>
<span class="sourceLineNo">186</span> if (!walSplitter.walFS.delete(editsWriter.path, false)) {<a name="line.186"></a>
<span class="sourceLineNo">187</span> LOG.warn("Failed deleting of {}", editsWriter.path);<a name="line.187"></a>
<span class="sourceLineNo">188</span> throw new IOException("Failed deleting of " + editsWriter.path);<a name="line.188"></a>
<span class="sourceLineNo">189</span> }<a name="line.189"></a>
<span class="sourceLineNo">190</span> }<a name="line.190"></a>
<span class="sourceLineNo">191</span> }<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> * Private data structure that wraps a {@link WALProvider.Writer} and its Path, also collecting<a name="line.194"></a>
<span class="sourceLineNo">195</span> * statistics about the data written to this output.<a name="line.195"></a>
<span class="sourceLineNo">196</span> */<a name="line.196"></a>
<span class="sourceLineNo">197</span> final class RecoveredEditsWriter {<a name="line.197"></a>
<span class="sourceLineNo">198</span> /* Count of edits written to this path */<a name="line.198"></a>
<span class="sourceLineNo">199</span> long editsWritten = 0;<a name="line.199"></a>
<span class="sourceLineNo">200</span> /* Count of edits skipped to this path */<a name="line.200"></a>
<span class="sourceLineNo">201</span> long editsSkipped = 0;<a name="line.201"></a>
<span class="sourceLineNo">202</span> /* Number of nanos spent writing to this log */<a name="line.202"></a>
<span class="sourceLineNo">203</span> long nanosSpent = 0;<a name="line.203"></a>
<span class="sourceLineNo">204</span><a name="line.204"></a>
<span class="sourceLineNo">205</span> final byte[] encodedRegionName;<a name="line.205"></a>
<span class="sourceLineNo">206</span> final Path path;<a name="line.206"></a>
<span class="sourceLineNo">207</span> final WALProvider.Writer writer;<a name="line.207"></a>
<span class="sourceLineNo">208</span> final long minLogSeqNum;<a name="line.208"></a>
<span class="sourceLineNo">209</span><a name="line.209"></a>
<span class="sourceLineNo">210</span> RecoveredEditsWriter(byte[] encodedRegionName, Path path, WALProvider.Writer writer,<a name="line.210"></a>
<span class="sourceLineNo">211</span> long minLogSeqNum) {<a name="line.211"></a>
<span class="sourceLineNo">212</span> this.encodedRegionName = encodedRegionName;<a name="line.212"></a>
<span class="sourceLineNo">213</span> this.path = path;<a name="line.213"></a>
<span class="sourceLineNo">214</span> this.writer = writer;<a name="line.214"></a>
<span class="sourceLineNo">215</span> this.minLogSeqNum = minLogSeqNum;<a name="line.215"></a>
<span class="sourceLineNo">216</span> }<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span> private void incrementEdits(int edits) {<a name="line.218"></a>
<span class="sourceLineNo">219</span> editsWritten += edits;<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> private void incrementSkippedEdits(int skipped) {<a name="line.222"></a>
<span class="sourceLineNo">223</span> editsSkipped += skipped;<a name="line.223"></a>
<span class="sourceLineNo">224</span> totalSkippedEdits.addAndGet(skipped);<a name="line.224"></a>
<span class="sourceLineNo">225</span> }<a name="line.225"></a>
<span class="sourceLineNo">226</span><a name="line.226"></a>
<span class="sourceLineNo">227</span> private void incrementNanoTime(long nanos) {<a name="line.227"></a>
<span class="sourceLineNo">228</span> nanosSpent += nanos;<a name="line.228"></a>
<span class="sourceLineNo">229</span> }<a name="line.229"></a>
<span class="sourceLineNo">230</span><a name="line.230"></a>
<span class="sourceLineNo">231</span> void writeRegionEntries(List&lt;WAL.Entry&gt; entries) throws IOException {<a name="line.231"></a>
<span class="sourceLineNo">232</span> long startTime = System.nanoTime();<a name="line.232"></a>
<span class="sourceLineNo">233</span> int editsCount = 0;<a name="line.233"></a>
<span class="sourceLineNo">234</span> for (WAL.Entry logEntry : entries) {<a name="line.234"></a>
<span class="sourceLineNo">235</span> filterCellByStore(logEntry);<a name="line.235"></a>
<span class="sourceLineNo">236</span> if (!logEntry.getEdit().isEmpty()) {<a name="line.236"></a>
<span class="sourceLineNo">237</span> try {<a name="line.237"></a>
<span class="sourceLineNo">238</span> writer.append(logEntry);<a name="line.238"></a>
<span class="sourceLineNo">239</span> } catch (IOException e) {<a name="line.239"></a>
<span class="sourceLineNo">240</span> logAndThrowWriterAppendFailure(logEntry, e);<a name="line.240"></a>
<span class="sourceLineNo">241</span> }<a name="line.241"></a>
<span class="sourceLineNo">242</span> updateRegionMaximumEditLogSeqNum(logEntry);<a name="line.242"></a>
<span class="sourceLineNo">243</span> editsCount++;<a name="line.243"></a>
<span class="sourceLineNo">244</span> } else {<a name="line.244"></a>
<span class="sourceLineNo">245</span> incrementSkippedEdits(1);<a name="line.245"></a>
<span class="sourceLineNo">246</span> }<a name="line.246"></a>
<span class="sourceLineNo">247</span> }<a name="line.247"></a>
<span class="sourceLineNo">248</span> // Pass along summary statistics<a name="line.248"></a>
<span class="sourceLineNo">249</span> incrementEdits(editsCount);<a name="line.249"></a>
<span class="sourceLineNo">250</span> incrementNanoTime(System.nanoTime() - startTime);<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> private void logAndThrowWriterAppendFailure(WAL.Entry logEntry, IOException e)<a name="line.253"></a>
<span class="sourceLineNo">254</span> throws IOException {<a name="line.254"></a>
<span class="sourceLineNo">255</span> e = e instanceof RemoteException ? ((RemoteException) e).unwrapRemoteException() : e;<a name="line.255"></a>
<span class="sourceLineNo">256</span> final String errorMsg = "Failed to write log entry " + logEntry.toString() + " to log";<a name="line.256"></a>
<span class="sourceLineNo">257</span> LOG.error(HBaseMarkers.FATAL, errorMsg, e);<a name="line.257"></a>
<span class="sourceLineNo">258</span> updateStatusWithMsg(errorMsg);<a name="line.258"></a>
<span class="sourceLineNo">259</span> throw e;<a name="line.259"></a>
<span class="sourceLineNo">260</span> }<a name="line.260"></a>
<span class="sourceLineNo">261</span><a name="line.261"></a>
<span class="sourceLineNo">262</span> private void filterCellByStore(WAL.Entry logEntry) {<a name="line.262"></a>
<span class="sourceLineNo">263</span> Map&lt;byte[], Long&gt; maxSeqIdInStores = walSplitter.getRegionMaxSeqIdInStores()<a name="line.263"></a>
<span class="sourceLineNo">264</span> .get(Bytes.toString(logEntry.getKey().getEncodedRegionName()));<a name="line.264"></a>
<span class="sourceLineNo">265</span> if (MapUtils.isEmpty(maxSeqIdInStores)) {<a name="line.265"></a>
<span class="sourceLineNo">266</span> return;<a name="line.266"></a>
<span class="sourceLineNo">267</span> }<a name="line.267"></a>
<span class="sourceLineNo">268</span> // Create the array list for the cells that aren't filtered.<a name="line.268"></a>
<span class="sourceLineNo">269</span> // We make the assumption that most cells will be kept.<a name="line.269"></a>
<span class="sourceLineNo">270</span> ArrayList&lt;Cell&gt; keptCells = new ArrayList&lt;&gt;(logEntry.getEdit().getCells().size());<a name="line.270"></a>
<span class="sourceLineNo">271</span> for (Cell cell : logEntry.getEdit().getCells()) {<a name="line.271"></a>
<span class="sourceLineNo">272</span> if (WALEdit.isMetaEditFamily(cell)) {<a name="line.272"></a>
<span class="sourceLineNo">273</span> keptCells.add(cell);<a name="line.273"></a>
<span class="sourceLineNo">274</span> } else {<a name="line.274"></a>
<span class="sourceLineNo">275</span> byte[] family = CellUtil.cloneFamily(cell);<a name="line.275"></a>
<span class="sourceLineNo">276</span> Long maxSeqId = maxSeqIdInStores.get(family);<a name="line.276"></a>
<span class="sourceLineNo">277</span> // Do not skip cell even if maxSeqId is null. Maybe we are in a rolling upgrade,<a name="line.277"></a>
<span class="sourceLineNo">278</span> // or the master was crashed before and we can not get the information.<a name="line.278"></a>
<span class="sourceLineNo">279</span> if (maxSeqId == null || maxSeqId.longValue() &lt; logEntry.getKey().getSequenceId()) {<a name="line.279"></a>
<span class="sourceLineNo">280</span> keptCells.add(cell);<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 name="line.284"></a>
<span class="sourceLineNo">285</span> // Anything in the keptCells array list is still live.<a name="line.285"></a>
<span class="sourceLineNo">286</span> // So rather than removing the cells from the array list<a name="line.286"></a>
<span class="sourceLineNo">287</span> // which would be an O(n^2) operation, we just replace the list<a name="line.287"></a>
<span class="sourceLineNo">288</span> logEntry.getEdit().setCells(keptCells);<a name="line.288"></a>
<span class="sourceLineNo">289</span> }<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>
</pre>
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