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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.client;<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.HConstants.EMPTY_END_ROW;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.HConstants.EMPTY_START_ROW;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.createScanResultCache;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.getLocateType;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.incRPCCallsMetrics;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.incRPCRetriesMetrics;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.incRegionCountMetrics;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.isRemote;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import static org.apache.hadoop.hbase.client.ConnectionUtils.timelineConsistentRead;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import static org.apache.hadoop.hbase.util.FutureUtils.addListener;<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>import io.opentelemetry.api.trace.Span;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import io.opentelemetry.api.trace.StatusCode;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import io.opentelemetry.context.Scope;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import java.io.IOException;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import java.util.Map;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import java.util.concurrent.CompletableFuture;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import java.util.concurrent.TimeUnit;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.HRegionLocation;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.TableName;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.client.metrics.ScanMetrics;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.client.trace.TableOperationSpanBuilder;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.ipc.HBaseRpcController;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.trace.TraceUtil;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.45"></a>
<span class="sourceLineNo">046</span><a name="line.46"></a>
<span class="sourceLineNo">047</span>import org.apache.hbase.thirdparty.io.netty.util.Timer;<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.49"></a>
<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService;<a name="line.50"></a>
<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService.Interface;<a name="line.51"></a>
<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse;<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>/**<a name="line.55"></a>
<span class="sourceLineNo">056</span> * The asynchronous client scanner implementation.<a name="line.56"></a>
<span class="sourceLineNo">057</span> * &lt;p&gt;<a name="line.57"></a>
<span class="sourceLineNo">058</span> * Here we will call OpenScanner first and use the returned scannerId to create a<a name="line.58"></a>
<span class="sourceLineNo">059</span> * {@link AsyncScanSingleRegionRpcRetryingCaller} to do the real scan operation. The return value of<a name="line.59"></a>
<span class="sourceLineNo">060</span> * {@link AsyncScanSingleRegionRpcRetryingCaller} will tell us whether open a new scanner or finish<a name="line.60"></a>
<span class="sourceLineNo">061</span> * scan.<a name="line.61"></a>
<span class="sourceLineNo">062</span> */<a name="line.62"></a>
<span class="sourceLineNo">063</span>@InterfaceAudience.Private<a name="line.63"></a>
<span class="sourceLineNo">064</span>class AsyncClientScanner {<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span> // We will use this scan object during the whole scan operation. The<a name="line.66"></a>
<span class="sourceLineNo">067</span> // AsyncScanSingleRegionRpcRetryingCaller will modify this scan object directly.<a name="line.67"></a>
<span class="sourceLineNo">068</span> private final Scan scan;<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span> private final ScanMetrics scanMetrics;<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span> private final AdvancedScanResultConsumer consumer;<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span> private final TableName tableName;<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span> private final AsyncConnectionImpl conn;<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span> private final Timer retryTimer;<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>
<span class="sourceLineNo">080</span> private final long pauseNs;<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span> private final long pauseNsForServerOverloaded;<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span> private final int maxAttempts;<a name="line.84"></a>
<span class="sourceLineNo">085</span><a name="line.85"></a>
<span class="sourceLineNo">086</span> private final long scanTimeoutNs;<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span> private final long rpcTimeoutNs;<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span> private final int startLogErrorsCnt;<a name="line.90"></a>
<span class="sourceLineNo">091</span><a name="line.91"></a>
<span class="sourceLineNo">092</span> private final ScanResultCache resultCache;<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span> private final Span span;<a name="line.94"></a>
<span class="sourceLineNo">095</span><a name="line.95"></a>
<span class="sourceLineNo">096</span> private final Map&lt;String, byte[]&gt; requestAttributes;<a name="line.96"></a>
<span class="sourceLineNo">097</span><a name="line.97"></a>
<span class="sourceLineNo">098</span> public AsyncClientScanner(Scan scan, AdvancedScanResultConsumer consumer, TableName tableName,<a name="line.98"></a>
<span class="sourceLineNo">099</span> AsyncConnectionImpl conn, Timer retryTimer, long pauseNs, long pauseNsForServerOverloaded,<a name="line.99"></a>
<span class="sourceLineNo">100</span> int maxAttempts, long scanTimeoutNs, long rpcTimeoutNs, int startLogErrorsCnt,<a name="line.100"></a>
<span class="sourceLineNo">101</span> Map&lt;String, byte[]&gt; requestAttributes) {<a name="line.101"></a>
<span class="sourceLineNo">102</span> if (scan.getStartRow() == null) {<a name="line.102"></a>
<span class="sourceLineNo">103</span> scan.withStartRow(EMPTY_START_ROW, scan.includeStartRow());<a name="line.103"></a>
<span class="sourceLineNo">104</span> }<a name="line.104"></a>
<span class="sourceLineNo">105</span> if (scan.getStopRow() == null) {<a name="line.105"></a>
<span class="sourceLineNo">106</span> scan.withStopRow(EMPTY_END_ROW, scan.includeStopRow());<a name="line.106"></a>
<span class="sourceLineNo">107</span> }<a name="line.107"></a>
<span class="sourceLineNo">108</span> this.scan = scan;<a name="line.108"></a>
<span class="sourceLineNo">109</span> this.consumer = consumer;<a name="line.109"></a>
<span class="sourceLineNo">110</span> this.tableName = tableName;<a name="line.110"></a>
<span class="sourceLineNo">111</span> this.conn = conn;<a name="line.111"></a>
<span class="sourceLineNo">112</span> this.retryTimer = retryTimer;<a name="line.112"></a>
<span class="sourceLineNo">113</span> this.pauseNs = pauseNs;<a name="line.113"></a>
<span class="sourceLineNo">114</span> this.pauseNsForServerOverloaded = pauseNsForServerOverloaded;<a name="line.114"></a>
<span class="sourceLineNo">115</span> this.maxAttempts = maxAttempts;<a name="line.115"></a>
<span class="sourceLineNo">116</span> this.scanTimeoutNs = scanTimeoutNs;<a name="line.116"></a>
<span class="sourceLineNo">117</span> this.rpcTimeoutNs = rpcTimeoutNs;<a name="line.117"></a>
<span class="sourceLineNo">118</span> this.startLogErrorsCnt = startLogErrorsCnt;<a name="line.118"></a>
<span class="sourceLineNo">119</span> this.resultCache = createScanResultCache(scan);<a name="line.119"></a>
<span class="sourceLineNo">120</span> this.requestAttributes = requestAttributes;<a name="line.120"></a>
<span class="sourceLineNo">121</span> if (scan.isScanMetricsEnabled()) {<a name="line.121"></a>
<span class="sourceLineNo">122</span> this.scanMetrics = new ScanMetrics();<a name="line.122"></a>
<span class="sourceLineNo">123</span> consumer.onScanMetricsCreated(scanMetrics);<a name="line.123"></a>
<span class="sourceLineNo">124</span> } else {<a name="line.124"></a>
<span class="sourceLineNo">125</span> this.scanMetrics = null;<a name="line.125"></a>
<span class="sourceLineNo">126</span> }<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span> /*<a name="line.128"></a>
<span class="sourceLineNo">129</span> * Assumes that the `start()` method is called immediately after construction. If this is no<a name="line.129"></a>
<span class="sourceLineNo">130</span> * longer the case, for tracing correctness, we should move the start of the span into the<a name="line.130"></a>
<span class="sourceLineNo">131</span> * `start()` method. The cost of doing so would be making access to the `span` safe for<a name="line.131"></a>
<span class="sourceLineNo">132</span> * concurrent threads.<a name="line.132"></a>
<span class="sourceLineNo">133</span> */<a name="line.133"></a>
<span class="sourceLineNo">134</span> span = new TableOperationSpanBuilder(conn).setTableName(tableName).setOperation(scan).build();<a name="line.134"></a>
<span class="sourceLineNo">135</span> if (consumer instanceof AsyncTableResultScanner) {<a name="line.135"></a>
<span class="sourceLineNo">136</span> AsyncTableResultScanner scanner = (AsyncTableResultScanner) consumer;<a name="line.136"></a>
<span class="sourceLineNo">137</span> scanner.setSpan(span);<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> private static final class OpenScannerResponse {<a name="line.141"></a>
<span class="sourceLineNo">142</span><a name="line.142"></a>
<span class="sourceLineNo">143</span> public final HRegionLocation loc;<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span> public final boolean isRegionServerRemote;<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span> public final ClientService.Interface stub;<a name="line.147"></a>
<span class="sourceLineNo">148</span><a name="line.148"></a>
<span class="sourceLineNo">149</span> public final HBaseRpcController controller;<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span> public final ScanResponse resp;<a name="line.151"></a>
<span class="sourceLineNo">152</span><a name="line.152"></a>
<span class="sourceLineNo">153</span> public OpenScannerResponse(HRegionLocation loc, boolean isRegionServerRemote, Interface stub,<a name="line.153"></a>
<span class="sourceLineNo">154</span> HBaseRpcController controller, ScanResponse resp) {<a name="line.154"></a>
<span class="sourceLineNo">155</span> this.loc = loc;<a name="line.155"></a>
<span class="sourceLineNo">156</span> this.isRegionServerRemote = isRegionServerRemote;<a name="line.156"></a>
<span class="sourceLineNo">157</span> this.stub = stub;<a name="line.157"></a>
<span class="sourceLineNo">158</span> this.controller = controller;<a name="line.158"></a>
<span class="sourceLineNo">159</span> this.resp = resp;<a name="line.159"></a>
<span class="sourceLineNo">160</span> }<a name="line.160"></a>
<span class="sourceLineNo">161</span> }<a name="line.161"></a>
<span class="sourceLineNo">162</span><a name="line.162"></a>
<span class="sourceLineNo">163</span> private final AtomicInteger openScannerTries = new AtomicInteger();<a name="line.163"></a>
<span class="sourceLineNo">164</span><a name="line.164"></a>
<span class="sourceLineNo">165</span> private CompletableFuture&lt;OpenScannerResponse&gt; callOpenScanner(HBaseRpcController controller,<a name="line.165"></a>
<span class="sourceLineNo">166</span> HRegionLocation loc, ClientService.Interface stub) {<a name="line.166"></a>
<span class="sourceLineNo">167</span> try (Scope ignored = span.makeCurrent()) {<a name="line.167"></a>
<span class="sourceLineNo">168</span> boolean isRegionServerRemote = isRemote(loc.getHostname());<a name="line.168"></a>
<span class="sourceLineNo">169</span> incRPCCallsMetrics(scanMetrics, isRegionServerRemote);<a name="line.169"></a>
<span class="sourceLineNo">170</span> if (openScannerTries.getAndIncrement() &gt; 1) {<a name="line.170"></a>
<span class="sourceLineNo">171</span> incRPCRetriesMetrics(scanMetrics, isRegionServerRemote);<a name="line.171"></a>
<span class="sourceLineNo">172</span> }<a name="line.172"></a>
<span class="sourceLineNo">173</span> CompletableFuture&lt;OpenScannerResponse&gt; future = new CompletableFuture&lt;&gt;();<a name="line.173"></a>
<span class="sourceLineNo">174</span> try {<a name="line.174"></a>
<span class="sourceLineNo">175</span> ScanRequest request = RequestConverter.buildScanRequest(loc.getRegion().getRegionName(),<a name="line.175"></a>
<span class="sourceLineNo">176</span> scan, scan.getCaching(), false);<a name="line.176"></a>
<span class="sourceLineNo">177</span> stub.scan(controller, request, resp -&gt; {<a name="line.177"></a>
<span class="sourceLineNo">178</span> try (Scope ignored1 = span.makeCurrent()) {<a name="line.178"></a>
<span class="sourceLineNo">179</span> if (controller.failed()) {<a name="line.179"></a>
<span class="sourceLineNo">180</span> final IOException e = controller.getFailed();<a name="line.180"></a>
<span class="sourceLineNo">181</span> future.completeExceptionally(e);<a name="line.181"></a>
<span class="sourceLineNo">182</span> TraceUtil.setError(span, e);<a name="line.182"></a>
<span class="sourceLineNo">183</span> span.end();<a name="line.183"></a>
<span class="sourceLineNo">184</span> return;<a name="line.184"></a>
<span class="sourceLineNo">185</span> }<a name="line.185"></a>
<span class="sourceLineNo">186</span> future<a name="line.186"></a>
<span class="sourceLineNo">187</span> .complete(new OpenScannerResponse(loc, isRegionServerRemote, stub, controller, resp));<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> } catch (IOException e) {<a name="line.190"></a>
<span class="sourceLineNo">191</span> // span is closed by listener attached to the Future in `openScanner()`<a name="line.191"></a>
<span class="sourceLineNo">192</span> future.completeExceptionally(e);<a name="line.192"></a>
<span class="sourceLineNo">193</span> }<a name="line.193"></a>
<span class="sourceLineNo">194</span> return future;<a name="line.194"></a>
<span class="sourceLineNo">195</span> }<a name="line.195"></a>
<span class="sourceLineNo">196</span> }<a name="line.196"></a>
<span class="sourceLineNo">197</span><a name="line.197"></a>
<span class="sourceLineNo">198</span> private void startScan(OpenScannerResponse resp) {<a name="line.198"></a>
<span class="sourceLineNo">199</span> addListener(<a name="line.199"></a>
<span class="sourceLineNo">200</span> conn.callerFactory.scanSingleRegion().id(resp.resp.getScannerId()).location(resp.loc)<a name="line.200"></a>
<span class="sourceLineNo">201</span> .remote(resp.isRegionServerRemote)<a name="line.201"></a>
<span class="sourceLineNo">202</span> .scannerLeaseTimeoutPeriod(resp.resp.getTtl(), TimeUnit.MILLISECONDS).stub(resp.stub)<a name="line.202"></a>
<span class="sourceLineNo">203</span> .setScan(scan).metrics(scanMetrics).consumer(consumer).resultCache(resultCache)<a name="line.203"></a>
<span class="sourceLineNo">204</span> .rpcTimeout(rpcTimeoutNs, TimeUnit.NANOSECONDS)<a name="line.204"></a>
<span class="sourceLineNo">205</span> .scanTimeout(scanTimeoutNs, TimeUnit.NANOSECONDS).pause(pauseNs, TimeUnit.NANOSECONDS)<a name="line.205"></a>
<span class="sourceLineNo">206</span> .pauseForServerOverloaded(pauseNsForServerOverloaded, TimeUnit.NANOSECONDS)<a name="line.206"></a>
<span class="sourceLineNo">207</span> .maxAttempts(maxAttempts).startLogErrorsCnt(startLogErrorsCnt)<a name="line.207"></a>
<span class="sourceLineNo">208</span> .setRequestAttributes(requestAttributes).start(resp.controller, resp.resp),<a name="line.208"></a>
<span class="sourceLineNo">209</span> (hasMore, error) -&gt; {<a name="line.209"></a>
<span class="sourceLineNo">210</span> try (Scope ignored = span.makeCurrent()) {<a name="line.210"></a>
<span class="sourceLineNo">211</span> if (error != null) {<a name="line.211"></a>
<span class="sourceLineNo">212</span> try {<a name="line.212"></a>
<span class="sourceLineNo">213</span> consumer.onError(error);<a name="line.213"></a>
<span class="sourceLineNo">214</span> return;<a name="line.214"></a>
<span class="sourceLineNo">215</span> } finally {<a name="line.215"></a>
<span class="sourceLineNo">216</span> TraceUtil.setError(span, error);<a name="line.216"></a>
<span class="sourceLineNo">217</span> span.end();<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> if (hasMore) {<a name="line.220"></a>
<span class="sourceLineNo">221</span> openScanner();<a name="line.221"></a>
<span class="sourceLineNo">222</span> } else {<a name="line.222"></a>
<span class="sourceLineNo">223</span> try {<a name="line.223"></a>
<span class="sourceLineNo">224</span> consumer.onComplete();<a name="line.224"></a>
<span class="sourceLineNo">225</span> } finally {<a name="line.225"></a>
<span class="sourceLineNo">226</span> span.setStatus(StatusCode.OK);<a name="line.226"></a>
<span class="sourceLineNo">227</span> span.end();<a name="line.227"></a>
<span class="sourceLineNo">228</span> }<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> });<a name="line.231"></a>
<span class="sourceLineNo">232</span> }<a name="line.232"></a>
<span class="sourceLineNo">233</span><a name="line.233"></a>
<span class="sourceLineNo">234</span> private CompletableFuture&lt;OpenScannerResponse&gt; openScanner(int replicaId) {<a name="line.234"></a>
<span class="sourceLineNo">235</span> try (Scope ignored = span.makeCurrent()) {<a name="line.235"></a>
<span class="sourceLineNo">236</span> return conn.callerFactory.&lt;OpenScannerResponse&gt; single().table(tableName)<a name="line.236"></a>
<span class="sourceLineNo">237</span> .row(scan.getStartRow()).replicaId(replicaId).locateType(getLocateType(scan))<a name="line.237"></a>
<span class="sourceLineNo">238</span> .priority(scan.getPriority()).rpcTimeout(rpcTimeoutNs, TimeUnit.NANOSECONDS)<a name="line.238"></a>
<span class="sourceLineNo">239</span> .operationTimeout(scanTimeoutNs, TimeUnit.NANOSECONDS).pause(pauseNs, TimeUnit.NANOSECONDS)<a name="line.239"></a>
<span class="sourceLineNo">240</span> .pauseForServerOverloaded(pauseNsForServerOverloaded, TimeUnit.NANOSECONDS)<a name="line.240"></a>
<span class="sourceLineNo">241</span> .maxAttempts(maxAttempts).startLogErrorsCnt(startLogErrorsCnt)<a name="line.241"></a>
<span class="sourceLineNo">242</span> .setRequestAttributes(requestAttributes).action(this::callOpenScanner).call();<a name="line.242"></a>
<span class="sourceLineNo">243</span> }<a name="line.243"></a>
<span class="sourceLineNo">244</span> }<a name="line.244"></a>
<span class="sourceLineNo">245</span><a name="line.245"></a>
<span class="sourceLineNo">246</span> private long getPrimaryTimeoutNs() {<a name="line.246"></a>
<span class="sourceLineNo">247</span> return TableName.isMetaTableName(tableName)<a name="line.247"></a>
<span class="sourceLineNo">248</span> ? conn.connConf.getPrimaryMetaScanTimeoutNs()<a name="line.248"></a>
<span class="sourceLineNo">249</span> : conn.connConf.getPrimaryScanTimeoutNs();<a name="line.249"></a>
<span class="sourceLineNo">250</span> }<a name="line.250"></a>
<span class="sourceLineNo">251</span><a name="line.251"></a>
<span class="sourceLineNo">252</span> private void openScanner() {<a name="line.252"></a>
<span class="sourceLineNo">253</span> incRegionCountMetrics(scanMetrics);<a name="line.253"></a>
<span class="sourceLineNo">254</span> openScannerTries.set(1);<a name="line.254"></a>
<span class="sourceLineNo">255</span> addListener(timelineConsistentRead(conn.getLocator(), tableName, scan, scan.getStartRow(),<a name="line.255"></a>
<span class="sourceLineNo">256</span> getLocateType(scan), this::openScanner, rpcTimeoutNs, getPrimaryTimeoutNs(), retryTimer,<a name="line.256"></a>
<span class="sourceLineNo">257</span> conn.getConnectionMetrics()), (resp, error) -&gt; {<a name="line.257"></a>
<span class="sourceLineNo">258</span> try (Scope ignored = span.makeCurrent()) {<a name="line.258"></a>
<span class="sourceLineNo">259</span> if (error != null) {<a name="line.259"></a>
<span class="sourceLineNo">260</span> try {<a name="line.260"></a>
<span class="sourceLineNo">261</span> consumer.onError(error);<a name="line.261"></a>
<span class="sourceLineNo">262</span> return;<a name="line.262"></a>
<span class="sourceLineNo">263</span> } finally {<a name="line.263"></a>
<span class="sourceLineNo">264</span> TraceUtil.setError(span, error);<a name="line.264"></a>
<span class="sourceLineNo">265</span> span.end();<a name="line.265"></a>
<span class="sourceLineNo">266</span> }<a name="line.266"></a>
<span class="sourceLineNo">267</span> }<a name="line.267"></a>
<span class="sourceLineNo">268</span> startScan(resp);<a name="line.268"></a>
<span class="sourceLineNo">269</span> }<a name="line.269"></a>
<span class="sourceLineNo">270</span> });<a name="line.270"></a>
<span class="sourceLineNo">271</span> }<a name="line.271"></a>
<span class="sourceLineNo">272</span><a name="line.272"></a>
<span class="sourceLineNo">273</span> public void start() {<a name="line.273"></a>
<span class="sourceLineNo">274</span> try (Scope ignored = span.makeCurrent()) {<a name="line.274"></a>
<span class="sourceLineNo">275</span> openScanner();<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>}<a name="line.278"></a>
</pre>
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