[09/51] [partial] hbase-site git commit: Published site at .

Wed, 16 Aug 2017 08:08:08 -0700 

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1ada5f22/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.ScanControllerImpl.html
----------------------------------------------------------------------
diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.ScanControllerImpl.html
 
b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.ScanControllerImpl.html
index e7cd47c..d61d346 100644
--- 
a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.ScanControllerImpl.html
+++ 
b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.ScanControllerImpl.html
@@ -43,132 +43,132 @@
 <span class="sourceLineNo">035</span><a name="line.35"></a>
 <span class="sourceLineNo">036</span>import java.io.IOException;<a 
name="line.36"></a>
 <span class="sourceLineNo">037</span>import java.util.ArrayList;<a 
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java.util.concurrent.CompletableFuture;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import java.util.concurrent.TimeUnit;<a 
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-<span class="sourceLineNo">042</span><a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.commons.logging.Log;<a 
name="line.43"></a>
-<span class="sourceLineNo">044</span>import 
org.apache.commons.logging.LogFactory;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import 
org.apache.hadoop.hbase.DoNotRetryIOException;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import 
org.apache.hadoop.hbase.HRegionLocation;<a name="line.46"></a>
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org.apache.hadoop.hbase.NotServingRegionException;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import 
org.apache.hadoop.hbase.UnknownScannerException;<a name="line.48"></a>
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org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.49"></a>
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org.apache.hadoop.hbase.client.RawScanResultConsumer.ScanResumer;<a 
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org.apache.hadoop.hbase.client.metrics.ScanMetrics;<a name="line.51"></a>
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org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;<a 
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org.apache.hadoop.hbase.exceptions.ScannerResetException;<a name="line.53"></a>
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org.apache.hadoop.hbase.ipc.HBaseRpcController;<a name="line.54"></a>
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org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;<a 
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org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.56"></a>
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org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.57"></a>
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org.apache.hadoop.hbase.shaded.protobuf.ResponseConverter;<a name="line.58"></a>
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org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService;<a 
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org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService.Interface;<a
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org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest;<a 
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org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse;<a 
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org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.63"></a>
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-<span class="sourceLineNo">065</span>/**<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * Retry caller for scanning a region.<a 
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-<span class="sourceLineNo">067</span> * &lt;p&gt;<a name="line.67"></a>
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passed in directly. The upper layer should store the<a name="line.68"></a>
-<span class="sourceLineNo">069</span> * reference of this object and use it to 
open new single region scanners.<a name="line.69"></a>
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AsyncScanSingleRegionRpcRetryingCaller {<a name="line.72"></a>
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LogFactory.getLog(AsyncScanSingleRegionRpcRetryingCaller.class);<a 
name="line.74"></a>
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retryTimer;<a name="line.76"></a>
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regionServerRemote;<a name="line.92"></a>
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scannerLeaseTimeoutPeriodNs;<a name="line.94"></a>
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completeWhenNoMoreResultsInRegion;<a name="line.106"></a>
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CompletableFuture&lt;Boolean&gt; future;<a name="line.108"></a>
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-<span class="sourceLineNo">110</span>  private final HBaseRpcController 
controller;<a name="line.110"></a>
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-<span class="sourceLineNo">112</span>  private byte[] nextStartRowWhenError;<a 
name="line.112"></a>
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-<span class="sourceLineNo">114</span>  private boolean 
includeNextStartRowWhenError;<a name="line.114"></a>
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-<span class="sourceLineNo">118</span>  private int tries;<a 
name="line.118"></a>
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-<span class="sourceLineNo">120</span>  private final 
List&lt;RetriesExhaustedException.ThrowableWithExtraContext&gt; exceptions;<a 
name="line.120"></a>
-<span class="sourceLineNo">121</span><a name="line.121"></a>
-<span class="sourceLineNo">122</span>  private long nextCallSeq = -1L;<a 
name="line.122"></a>
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-<span class="sourceLineNo">124</span>  private enum ScanControllerState {<a 
name="line.124"></a>
-<span class="sourceLineNo">125</span>    INITIALIZED, SUSPENDED, TERMINATED, 
DESTROYED<a name="line.125"></a>
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-<span class="sourceLineNo">127</span><a name="line.127"></a>
-<span class="sourceLineNo">128</span>  // Since suspend and terminate should 
only be called within onNext or onHeartbeat(see the comments<a 
name="line.128"></a>
-<span class="sourceLineNo">129</span>  // of RawScanResultConsumer.onNext and 
onHeartbeat), we need to add some check to prevent invalid<a 
name="line.129"></a>
-<span class="sourceLineNo">130</span>  // usage. We use two things to prevent 
invalid usage:<a name="line.130"></a>
-<span class="sourceLineNo">131</span>  // 1. Record the thread that construct 
the ScanControllerImpl instance. We will throw an<a name="line.131"></a>
-<span class="sourceLineNo">132</span>  // IllegalStateException if the caller 
thread is not this thread.<a name="line.132"></a>
-<span class="sourceLineNo">133</span>  // 2. The ControllerState. The initial 
state is INITIALIZED, if you call suspend, the state will<a name="line.133"></a>
-<span class="sourceLineNo">134</span>  // be transformed to SUSPENDED, and if 
you call terminate, the state will be transformed to<a name="line.134"></a>
-<span class="sourceLineNo">135</span>  // TERMINATED. And when we are back 
from onNext or onHeartbeat in the onComplete method, we will<a 
name="line.135"></a>
-<span class="sourceLineNo">136</span>  // call destroy to get the current 
state and set the state to DESTROYED. And when user calls<a name="line.136"></a>
-<span class="sourceLineNo">137</span>  // suspend or terminate, we will check 
if the current state is INITIALIZED, if not we will throw<a name="line.137"></a>
-<span class="sourceLineNo">138</span>  // an IllegalStateException. Notice 
that the DESTROYED state is necessary as you may not call<a name="line.138"></a>
-<span class="sourceLineNo">139</span>  // suspend or terminate so the state 
will still be INITIALIZED when back from onNext or<a name="line.139"></a>
-<span class="sourceLineNo">140</span>  // onHeartbeat. We need another state 
to replace the INITIALIZED state to prevent the controller<a 
name="line.140"></a>
-<span class="sourceLineNo">141</span>  // to be used in the future.<a 
name="line.141"></a>
-<span class="sourceLineNo">142</span>  // Notice that, the public methods of 
this class is supposed to be called by upper layer only, and<a 
name="line.142"></a>
-<span class="sourceLineNo">143</span>  // package private methods can only be 
called within the implementation of<a name="line.143"></a>
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AsyncScanSingleRegionRpcRetryingCaller.<a name="line.144"></a>
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implements RawScanResultConsumer.ScanController {<a name="line.145"></a>
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called in this thread.<a name="line.147"></a>
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name="line.148"></a>
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-<span class="sourceLineNo">150</span>    private final Optional&lt;Cursor&gt; 
cursor;<a name="line.150"></a>
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-<span class="sourceLineNo">152</span>    // INITIALIZED -&gt; SUSPENDED -&gt; 
DESTROYED<a name="line.152"></a>
-<span class="sourceLineNo">153</span>    // INITIALIZED -&gt; TERMINATED -&gt; 
DESTROYED<a name="line.153"></a>
-<span class="sourceLineNo">154</span>    // INITIALIZED -&gt; DESTROYED<a 
name="line.154"></a>
-<span class="sourceLineNo">155</span>    // If the state is incorrect we will 
throw IllegalStateException.<a name="line.155"></a>
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ScanControllerState.INITIALIZED;<a name="line.156"></a>
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-<span class="sourceLineNo">160</span>    public 
ScanControllerImpl(ScanResponse resp) {<a name="line.160"></a>
-<span class="sourceLineNo">161</span>      callerThread = 
Thread.currentThread();<a name="line.161"></a>
-<span class="sourceLineNo">162</span>      cursor = resp.hasCursor() ? 
Optional.of(ProtobufUtil.toCursor(resp.getCursor()))<a name="line.162"></a>
-<span class="sourceLineNo">163</span>          : Optional.empty();<a 
name="line.163"></a>
+<span class="sourceLineNo">038</span>import java.util.Arrays;<a 
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+<span class="sourceLineNo">039</span>import java.util.List;<a 
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java.util.concurrent.CompletableFuture;<a name="line.41"></a>
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+<span class="sourceLineNo">044</span>import org.apache.commons.logging.Log;<a 
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+<span class="sourceLineNo">045</span>import 
org.apache.commons.logging.LogFactory;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import 
org.apache.hadoop.hbase.DoNotRetryIOException;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import 
org.apache.hadoop.hbase.HRegionLocation;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import 
org.apache.hadoop.hbase.NotServingRegionException;<a name="line.48"></a>
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org.apache.hadoop.hbase.UnknownScannerException;<a name="line.49"></a>
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org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.50"></a>
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org.apache.hadoop.hbase.client.RawScanResultConsumer.ScanResumer;<a 
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org.apache.hadoop.hbase.client.metrics.ScanMetrics;<a name="line.52"></a>
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org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;<a 
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org.apache.hadoop.hbase.exceptions.ScannerResetException;<a name="line.54"></a>
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org.apache.hadoop.hbase.ipc.HBaseRpcController;<a name="line.55"></a>
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org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;<a 
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org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.57"></a>
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org.apache.hadoop.hbase.shaded.protobuf.ResponseConverter;<a name="line.59"></a>
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org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService.Interface;<a
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List&lt;RetriesExhaustedException.ThrowableWithExtraContext&gt; exceptions;<a 
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DESTROYED<a name="line.126"></a>
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only be called within onNext or onHeartbeat(see the comments<a 
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name="line.130"></a>
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invalid usage:<a name="line.131"></a>
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thread is not this thread.<a name="line.133"></a>
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you call terminate, the state will be transformed to<a name="line.135"></a>
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from onNext or onHeartbeat in the onComplete method, we will<a 
name="line.136"></a>
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state and set the state to DESTROYED. And when user calls<a name="line.137"></a>
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if the current state is INITIALIZED, if not we will throw<a name="line.138"></a>
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that the DESTROYED state is necessary as you may not call<a name="line.139"></a>
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will still be INITIALIZED when back from onNext or<a name="line.140"></a>
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to replace the INITIALIZED state to prevent the controller<a 
name="line.141"></a>
+<span class="sourceLineNo">142</span>  // to be used in the future.<a 
name="line.142"></a>
+<span class="sourceLineNo">143</span>  // Notice that, the public methods of 
this class is supposed to be called by upper layer only, and<a 
name="line.143"></a>
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called within the implementation of<a name="line.144"></a>
+<span class="sourceLineNo">145</span>  // 
AsyncScanSingleRegionRpcRetryingCaller.<a name="line.145"></a>
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implements RawScanResultConsumer.ScanController {<a name="line.146"></a>
+<span class="sourceLineNo">147</span><a name="line.147"></a>
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called in this thread.<a name="line.148"></a>
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name="line.149"></a>
+<span class="sourceLineNo">150</span><a name="line.150"></a>
+<span class="sourceLineNo">151</span>    private final Optional&lt;Cursor&gt; 
cursor;<a name="line.151"></a>
+<span class="sourceLineNo">152</span><a name="line.152"></a>
+<span class="sourceLineNo">153</span>    // INITIALIZED -&gt; SUSPENDED -&gt; 
DESTROYED<a name="line.153"></a>
+<span class="sourceLineNo">154</span>    // INITIALIZED -&gt; TERMINATED -&gt; 
DESTROYED<a name="line.154"></a>
+<span class="sourceLineNo">155</span>    // INITIALIZED -&gt; DESTROYED<a 
name="line.155"></a>
+<span class="sourceLineNo">156</span>    // If the state is incorrect we will 
throw IllegalStateException.<a name="line.156"></a>
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ScanControllerState.INITIALIZED;<a name="line.157"></a>
+<span class="sourceLineNo">158</span><a name="line.158"></a>
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+<span class="sourceLineNo">160</span><a name="line.160"></a>
+<span class="sourceLineNo">161</span>    public 
ScanControllerImpl(Optional&lt;Cursor&gt; cursor) {<a name="line.161"></a>
+<span class="sourceLineNo">162</span>      this.callerThread = 
Thread.currentThread();<a name="line.162"></a>
+<span class="sourceLineNo">163</span>      this.cursor = cursor;<a 
name="line.163"></a>
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same call sequence will cause an<a name="line.489"></a>
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server does not respond in time(usually this will not<a name="line.524"></a>
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only way to fix this is to close the scanner and open a<a name="line.526"></a>
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RequestConverter.buildScanRequest(scannerId, scan.getCaching(), false,<a 
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scan.getLimit());<a name="line.545"></a>
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onComplete(controller, resp));<a name="line.546"></a>
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name="line.479"></a>
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resultCache.numberOfCompleteRows();<a name="line.481"></a>
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ResponseConverter.getResults(controller.cellScanner(), resp);<a 
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rawResults, isHeartbeatMessage);<a name="line.484"></a>
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Optional.ofNullable(rawResults).orElse(ScanResultCache.EMPTY_RESULT_ARRAY),<a 
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+<span class="sourceLineNo">487</span>        isHeartbeatMessage);<a 
name="line.487"></a>
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same call sequence will cause an<a name="line.490"></a>
+<span class="sourceLineNo">491</span>      // OutOfOrderScannerNextException. 
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+<span class="sourceLineNo">496</span><a name="line.496"></a>
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Optional.of(ProtobufUtil.toCursor(resp.getCursor()))<a name="line.500"></a>
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updateNextStartRowWhenError(results[results.length - 1]);<a name="line.502"></a>
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Optional.of(ProtobufUtil.toCursor(resp.getCursor()));<a name="line.507"></a>
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consumer.onHeartbeat(scanController);<a name="line.519"></a>
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-<span class="sourceLineNo">579</span>}<a name="line.579"></a>
+<span class="sourceLineNo">559</span>    if (tries &gt; 1) {<a 
name="line.559"></a>
+<span class="sourceLineNo">560</span>      incRPCRetriesMetrics(scanMetrics, 
regionServerRemote);<a name="line.560"></a>
+<span class="sourceLineNo">561</span>    }<a name="line.561"></a>
+<span class="sourceLineNo">562</span>    resetController(controller, 
callTimeoutNs);<a name="line.562"></a>
+<span class="sourceLineNo">563</span>    ScanRequest req = 
RequestConverter.buildScanRequest(scannerId, scan.getCaching(), false,<a 
name="line.563"></a>
+<span class="sourceLineNo">564</span>      nextCallSeq, false, false, 
scan.getLimit());<a name="line.564"></a>
+<span class="sourceLineNo">565</span>    stub.scan(controller, req, resp -&gt; 
onComplete(controller, resp));<a name="line.565"></a>
+<span class="sourceLineNo">566</span>  }<a name="line.566"></a>
+<span class="sourceLineNo">567</span><a name="line.567"></a>
+<span class="sourceLineNo">568</span>  private void next() {<a 
name="line.568"></a>
+<span class="sourceLineNo">569</span>    nextCallSeq++;<a name="line.569"></a>
+<span class="sourceLineNo">570</span>    tries = 1;<a name="line.570"></a>
+<span class="sourceLineNo">571</span>    exceptions.clear();<a 
name="line.571"></a>
+<span class="sourceLineNo">572</span>    nextCallStartNs = 
System.nanoTime();<a name="line.572"></a>
+<span class="sourceLineNo">573</span>    call();<a name="line.573"></a>
+<span class="sourceLineNo">574</span>  }<a name="line.574"></a>
+<span class="sourceLineNo">575</span><a name="line.575"></a>
+<span class="sourceLineNo">576</span>  private void renewLease() {<a 
name="line.576"></a>
+<span class="sourceLineNo">577</span>    incRPCCallsMetrics(scanMetrics, 
regionServerRemote);<a name="line.577"></a>
+<span class="sourceLineNo">578</span>    nextCallSeq++;<a name="line.578"></a>
+<span class="sourceLineNo">579</span>    resetController(controller, 
rpcTimeoutNs);<a name="line.579"></a>
+<span class="sourceLineNo">580</span>    ScanRequest req =<a 
name="line.580"></a>
+<span class="sourceLineNo">581</span>        
RequestConverter.buildScanRequest(scannerId, 0, false, nextCallSeq, false, 
true, -1);<a name="line.581"></a>
+<span class="sourceLineNo">582</span>    stub.scan(controller, req, resp -&gt; 
{<a name="line.582"></a>
+<span class="sourceLineNo">583</span>    });<a name="line.583"></a>
+<span class="sourceLineNo">584</span>  }<a name="line.584"></a>
+<span class="sourceLineNo">585</span><a name="line.585"></a>
+<span class="sourceLineNo">586</span>  /**<a name="line.586"></a>
+<span class="sourceLineNo">587</span>   * Now we will also fetch some cells 
along with the scanner id when opening a scanner, so we also<a 
name="line.587"></a>
+<span class="sourceLineNo">588</span>   * need to process the ScanResponse for 
the open scanner request. The HBaseRpcController for the<a name="line.588"></a>
+<span class="sourceLineNo">589</span>   * open scanner request is also needed 
because we may have some data in the CellScanner which is<a name="line.589"></a>
+<span class="sourceLineNo">590</span>   * contained in the controller.<a 
name="line.590"></a>
+<span class="sourceLineNo">591</span>   * @return {@code true} if we should 
continue, otherwise {@code false}.<a name="line.591"></a>
+<span class="sourceLineNo">592</span>   */<a name="line.592"></a>
+<span class="sourceLineNo">593</span>  public CompletableFuture&lt;Boolean&gt; 
start(HBaseRpcController controller,<a name="line.593"></a>
+<span class="sourceLineNo">594</span>      ScanResponse respWhenOpen) {<a 
name="line.594"></a>
+<span class="sourceLineNo">595</span>    onComplete(controller, 
respWhenOpen);<a name="line.595"></a>
+<span class="sourceLineNo">596</span>    return future;<a name="line.596"></a>
+<span class="sourceLineNo">597</span>  }<a name="line.597"></a>
+<span class="sourceLineNo">598</span>}<a name="line.598"></a>

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