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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.mapreduce;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.lang.reflect.Method;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.Map;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.conf.Configuration;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.DoNotRetryIOException;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.client.ConnectionConfiguration;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.client.Result;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.client.ResultScanner;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.client.Table;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.client.metrics.ScanMetrics;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.io.ImmutableBytesWritable;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.mapreduce.Counter;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.mapreduce.InputSplit;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.mapreduce.TaskAttemptContext;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.util.StringUtils;<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>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span>/**<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * Iterate over an HBase table data, return (ImmutableBytesWritable, Result)<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * pairs.<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> */<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>@InterfaceAudience.Public<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>public class TableRecordReaderImpl {<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> public static final String LOG_PER_ROW_COUNT<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> = "hbase.mapreduce.log.scanner.rowcount";<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> private static final Logger LOG = LoggerFactory.getLogger(TableRecordReaderImpl.class);<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> // HBASE_COUNTER_GROUP_NAME is the name of mapreduce counter group for HBase<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> @VisibleForTesting<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> static final String HBASE_COUNTER_GROUP_NAME = "HBaseCounters";<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> private ResultScanner scanner = null;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> private Scan scan = null;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> private Scan currentScan = null;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> private Table htable = null;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> private byte[] lastSuccessfulRow = null;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> private ImmutableBytesWritable key = null;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> private Result value = null;<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> private TaskAttemptContext context = null;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> private long numRestarts = 0;<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> private long numStale = 0;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> private long timestamp;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> private int rowcount;<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> private boolean logScannerActivity = false;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> private int logPerRowCount = 100;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> /**<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * Restart from survivable exceptions by creating a new scanner.<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> *<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * @param firstRow The first row to start at.<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * @throws IOException When restarting fails.<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> */<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> public void restart(byte[] firstRow) throws IOException {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> // Update counter metrics based on current scan before reinitializing it<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> if (currentScan != null) {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> updateCounters();<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> }<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> currentScan = new Scan(scan);<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> currentScan.withStartRow(firstRow);<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> currentScan.setScanMetricsEnabled(true);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> if (this.scanner != null) {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> if (logScannerActivity) {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> LOG.info("Closing the previously opened scanner object.");<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> }<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> this.scanner.close();<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> }<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> this.scanner = this.htable.getScanner(currentScan);<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> if (logScannerActivity) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> LOG.info("Current scan=" + currentScan.toString());<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> timestamp = System.currentTimeMillis();<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> rowcount = 0;<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span><a name="line.98"></a> |
| <span class="sourceLineNo">099</span> /**<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> * In new mapreduce APIs, TaskAttemptContext has two getCounter methods<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> * Check if getCounter(String, String) method is available.<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> * @return The getCounter method or null if not available.<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> * @deprecated since 2.4.0 and 2.3.2, will be removed in 4.0.0<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> */<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> @Deprecated<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> protected static Method retrieveGetCounterWithStringsParams(TaskAttemptContext context)<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> throws IOException {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> Method m = null;<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> try {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> m = context.getClass().getMethod("getCounter",<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> new Class [] {String.class, String.class});<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> } catch (SecurityException e) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> throw new IOException("Failed test for getCounter", e);<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> } catch (NoSuchMethodException e) {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> // Ignore<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> return m;<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> }<a name="line.118"></a> |
| <span class="sourceLineNo">119</span><a name="line.119"></a> |
| <span class="sourceLineNo">120</span> /**<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> * Sets the HBase table.<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> * @param htable The table to scan.<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> */<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> public void setHTable(Table htable) {<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> Configuration conf = htable.getConfiguration();<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> logScannerActivity = conf.getBoolean(ConnectionConfiguration.LOG_SCANNER_ACTIVITY, false);<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> logPerRowCount = conf.getInt(LOG_PER_ROW_COUNT, 100);<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> this.htable = htable;<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> * Sets the scan defining the actual details like columns etc.<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> *<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> * @param scan The scan to set.<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> */<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> public void setScan(Scan scan) {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> this.scan = scan;<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> /**<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> * Build the scanner. Not done in constructor to allow for extension.<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> */<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> public void initialize(InputSplit inputsplit,<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> TaskAttemptContext context) throws IOException,<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> InterruptedException {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> if (context != null) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> this.context = context;<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> }<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> restart(scan.getStartRow());<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> }<a name="line.150"></a> |
| <span class="sourceLineNo">151</span><a name="line.151"></a> |
| <span class="sourceLineNo">152</span> /**<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> * Closes the split.<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> public void close() {<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> if (this.scanner != null) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> this.scanner.close();<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> }<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> try {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> this.htable.close();<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> } catch (IOException ioe) {<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> LOG.warn("Error closing table", ioe);<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><a name="line.167"></a> |
| <span class="sourceLineNo">168</span> /**<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> * Returns the current key.<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> *<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> * @return The current key.<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> * @throws InterruptedException When the job is aborted.<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> */<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> public ImmutableBytesWritable getCurrentKey() throws IOException,<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> InterruptedException {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> return key;<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> }<a name="line.177"></a> |
| <span class="sourceLineNo">178</span><a name="line.178"></a> |
| <span class="sourceLineNo">179</span> /**<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> * Returns the current value.<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> *<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> * @return The current value.<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> * @throws IOException When the value is faulty.<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> * @throws InterruptedException When the job is aborted.<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> */<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> public Result getCurrentValue() throws IOException, InterruptedException {<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> return value;<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> }<a name="line.188"></a> |
| <span class="sourceLineNo">189</span><a name="line.189"></a> |
| <span class="sourceLineNo">190</span><a name="line.190"></a> |
| <span class="sourceLineNo">191</span> /**<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> * Positions the record reader to the next record.<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> *<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> * @return <code>true</code> if there was another record.<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> * @throws IOException When reading the record failed.<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> * @throws InterruptedException When the job was aborted.<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> */<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> public boolean nextKeyValue() throws IOException, InterruptedException {<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> if (key == null) {<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> key = new ImmutableBytesWritable();<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> }<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> if (value == null) {<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> value = new Result();<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> }<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> try {<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> try {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> value = this.scanner.next();<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> if (value != null && value.isStale()) {<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> numStale++;<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> }<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> if (logScannerActivity) {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> rowcount ++;<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> if (rowcount >= logPerRowCount) {<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> long now = System.currentTimeMillis();<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> LOG.info("Mapper took {}ms to process {} rows", (now - timestamp), rowcount);<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> timestamp = now;<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> rowcount = 0;<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> }<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> }<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> } catch (IOException e) {<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> // do not retry if the exception tells us not to do so<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> if (e instanceof DoNotRetryIOException) {<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> updateCounters();<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> throw e;<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> }<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> // try to handle all other IOExceptions by restarting<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> // the scanner, if the second call fails, it will be rethrown<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> LOG.info("recovered from " + StringUtils.stringifyException(e));<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> if (lastSuccessfulRow == null) {<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> LOG.warn("We are restarting the first next() invocation," +<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> " if your mapper has restarted a few other times like this" +<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> " then you should consider killing this job and investigate" +<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> " why it's taking so long.");<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> }<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> if (lastSuccessfulRow == null) {<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> restart(scan.getStartRow());<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> } else {<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> restart(lastSuccessfulRow);<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> scanner.next(); // skip presumed already mapped row<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> }<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> value = scanner.next();<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> if (value != null && value.isStale()) {<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> numStale++;<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> }<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> numRestarts++;<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> if (value != null && value.size() > 0) {<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> key.set(value.getRow());<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> lastSuccessfulRow = key.get();<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> return true;<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> }<a name="line.252"></a> |
| <span class="sourceLineNo">253</span><a name="line.253"></a> |
| <span class="sourceLineNo">254</span> // Need handle cursor result<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> if (value != null && value.isCursor()) {<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> key.set(value.getCursor().getRow());<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> lastSuccessfulRow = key.get();<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> return true;<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> }<a name="line.259"></a> |
| <span class="sourceLineNo">260</span><a name="line.260"></a> |
| <span class="sourceLineNo">261</span> updateCounters();<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> return false;<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> } catch (IOException ioe) {<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> updateCounters();<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> if (logScannerActivity) {<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> long now = System.currentTimeMillis();<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> LOG.info("Mapper took {}ms to process {} rows", (now - timestamp), rowcount);<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> LOG.info(ioe.toString(), ioe);<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> String lastRow = lastSuccessfulRow == null ?<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> "null" : Bytes.toStringBinary(lastSuccessfulRow);<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> LOG.info("lastSuccessfulRow=" + lastRow);<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> }<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> throw ioe;<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> }<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> }<a name="line.275"></a> |
| <span class="sourceLineNo">276</span><a name="line.276"></a> |
| <span class="sourceLineNo">277</span> /**<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> * If hbase runs on new version of mapreduce, RecordReader has access to<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> * counters thus can update counters based on scanMetrics.<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> * If hbase runs on old version of mapreduce, it won't be able to get<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> * access to counters and TableRecorderReader can't update counter values.<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> */<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> private void updateCounters() {<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> ScanMetrics scanMetrics = scanner.getScanMetrics();<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> if (scanMetrics == null) {<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> return;<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> }<a name="line.287"></a> |
| <span class="sourceLineNo">288</span><a name="line.288"></a> |
| <span class="sourceLineNo">289</span> updateCounters(scanMetrics, numRestarts, context, numStale);<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> * @deprecated since 2.4.0 and 2.3.2, will be removed in 4.0.0<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> * Use {@link #updateCounters(ScanMetrics, long, TaskAttemptContext, long)} instead.<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> */<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> @Deprecated<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> protected static void updateCounters(ScanMetrics scanMetrics, long numScannerRestarts,<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> Method getCounter, TaskAttemptContext context, long numStale) {<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> updateCounters(scanMetrics, numScannerRestarts, context, numStale);<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> }<a name="line.300"></a> |
| <span class="sourceLineNo">301</span><a name="line.301"></a> |
| <span class="sourceLineNo">302</span> protected static void updateCounters(ScanMetrics scanMetrics, long numScannerRestarts,<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> TaskAttemptContext context, long numStale) {<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> // we can get access to counters only if hbase uses new mapreduce APIs<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> if (context == null) {<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> return;<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> }<a name="line.307"></a> |
| <span class="sourceLineNo">308</span><a name="line.308"></a> |
| <span class="sourceLineNo">309</span> for (Map.Entry<String, Long> entry : scanMetrics.getMetricsMap().entrySet()) {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> Counter counter = context.getCounter(HBASE_COUNTER_GROUP_NAME, entry.getKey());<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> if (counter != null) {<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> counter.increment(entry.getValue());<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> }<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> }<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> if (numScannerRestarts != 0L) {<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> Counter counter = context.getCounter(HBASE_COUNTER_GROUP_NAME, "NUM_SCANNER_RESTARTS");<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> if (counter != null) {<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> counter.increment(numScannerRestarts);<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> }<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> }<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> if (numStale != 0L) {<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> Counter counter = context.getCounter(HBASE_COUNTER_GROUP_NAME, "NUM_SCAN_RESULTS_STALE");<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> if (counter != null) {<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> counter.increment(numStale);<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> }<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><a name="line.328"></a> |
| <span class="sourceLineNo">329</span> /**<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> * The current progress of the record reader through its data.<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> *<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> * @return A number between 0.0 and 1.0, the fraction of the data read.<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> */<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> public float getProgress() {<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> // Depends on the total number of tuples<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> return 0;<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> }<a name="line.337"></a> |
| <span class="sourceLineNo">338</span><a name="line.338"></a> |
| <span class="sourceLineNo">339</span>}<a name="line.339"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
