http://git-wip-us.apache.org/repos/asf/hbase-site/blob/47be635d/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.html b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.html index c21aec6..0362d7f 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncScanSingleRegionRpcRetryingCaller.html @@ -61,516 +61,530 @@ <span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.exceptions.ScannerResetException;<a name="line.53"></a> <span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.ipc.HBaseRpcController;<a name="line.54"></a> <span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;<a name="line.55"></a> -<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.56"></a> -<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.shaded.protobuf.ResponseConverter;<a name="line.57"></a> -<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService;<a name="line.58"></a> -<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService.Interface;<a name="line.59"></a> -<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest;<a name="line.60"></a> -<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse;<a name="line.61"></a> -<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.62"></a> -<span class="sourceLineNo">063</span><a name="line.63"></a> -<span class="sourceLineNo">064</span>/**<a name="line.64"></a> -<span class="sourceLineNo">065</span> * Retry caller for scanning a region.<a name="line.65"></a> -<span class="sourceLineNo">066</span> * <p><a name="line.66"></a> -<span class="sourceLineNo">067</span> * We will modify the {@link Scan} object passed in directly. The upper layer should store the<a name="line.67"></a> -<span class="sourceLineNo">068</span> * reference of this object and use it to open new single region scanners.<a name="line.68"></a> -<span class="sourceLineNo">069</span> */<a name="line.69"></a> -<span class="sourceLineNo">070</span>@InterfaceAudience.Private<a name="line.70"></a> -<span class="sourceLineNo">071</span>class AsyncScanSingleRegionRpcRetryingCaller {<a name="line.71"></a> -<span class="sourceLineNo">072</span><a name="line.72"></a> -<span class="sourceLineNo">073</span> private static final Log LOG = LogFactory.getLog(AsyncScanSingleRegionRpcRetryingCaller.class);<a name="line.73"></a> -<span class="sourceLineNo">074</span><a name="line.74"></a> -<span class="sourceLineNo">075</span> private final HashedWheelTimer retryTimer;<a name="line.75"></a> -<span class="sourceLineNo">076</span><a name="line.76"></a> -<span class="sourceLineNo">077</span> private final Scan scan;<a name="line.77"></a> -<span class="sourceLineNo">078</span><a name="line.78"></a> -<span class="sourceLineNo">079</span> private final ScanMetrics scanMetrics;<a name="line.79"></a> -<span class="sourceLineNo">080</span><a name="line.80"></a> -<span class="sourceLineNo">081</span> private final long scannerId;<a name="line.81"></a> -<span class="sourceLineNo">082</span><a name="line.82"></a> -<span class="sourceLineNo">083</span> private final ScanResultCache resultCache;<a name="line.83"></a> -<span class="sourceLineNo">084</span><a name="line.84"></a> -<span class="sourceLineNo">085</span> private final RawScanResultConsumer consumer;<a name="line.85"></a> -<span class="sourceLineNo">086</span><a name="line.86"></a> -<span class="sourceLineNo">087</span> private final ClientService.Interface stub;<a name="line.87"></a> -<span class="sourceLineNo">088</span><a name="line.88"></a> -<span class="sourceLineNo">089</span> private final HRegionLocation loc;<a name="line.89"></a> -<span class="sourceLineNo">090</span><a name="line.90"></a> -<span class="sourceLineNo">091</span> private final boolean regionServerRemote;<a name="line.91"></a> -<span class="sourceLineNo">092</span><a name="line.92"></a> -<span class="sourceLineNo">093</span> private final long scannerLeaseTimeoutPeriodNs;<a name="line.93"></a> -<span class="sourceLineNo">094</span><a name="line.94"></a> -<span class="sourceLineNo">095</span> private final long pauseNs;<a name="line.95"></a> -<span class="sourceLineNo">096</span><a name="line.96"></a> -<span class="sourceLineNo">097</span> private final int maxAttempts;<a name="line.97"></a> -<span class="sourceLineNo">098</span><a name="line.98"></a> -<span class="sourceLineNo">099</span> private final long scanTimeoutNs;<a name="line.99"></a> -<span class="sourceLineNo">100</span><a name="line.100"></a> -<span class="sourceLineNo">101</span> private final long rpcTimeoutNs;<a name="line.101"></a> -<span class="sourceLineNo">102</span><a name="line.102"></a> -<span class="sourceLineNo">103</span> private final int startLogErrorsCnt;<a name="line.103"></a> -<span class="sourceLineNo">104</span><a name="line.104"></a> -<span class="sourceLineNo">105</span> private final Runnable completeWhenNoMoreResultsInRegion;<a name="line.105"></a> -<span class="sourceLineNo">106</span><a name="line.106"></a> -<span class="sourceLineNo">107</span> private final CompletableFuture<Boolean> future;<a name="line.107"></a> -<span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> private final HBaseRpcController controller;<a name="line.109"></a> -<span class="sourceLineNo">110</span><a name="line.110"></a> -<span class="sourceLineNo">111</span> private byte[] nextStartRowWhenError;<a name="line.111"></a> -<span class="sourceLineNo">112</span><a name="line.112"></a> -<span class="sourceLineNo">113</span> private boolean includeNextStartRowWhenError;<a name="line.113"></a> -<span class="sourceLineNo">114</span><a name="line.114"></a> -<span class="sourceLineNo">115</span> private long nextCallStartNs;<a name="line.115"></a> -<span class="sourceLineNo">116</span><a name="line.116"></a> -<span class="sourceLineNo">117</span> private int tries;<a name="line.117"></a> -<span class="sourceLineNo">118</span><a name="line.118"></a> -<span class="sourceLineNo">119</span> private final List<RetriesExhaustedException.ThrowableWithExtraContext> exceptions;<a name="line.119"></a> -<span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> private long nextCallSeq = -1L;<a name="line.121"></a> -<span class="sourceLineNo">122</span><a name="line.122"></a> -<span class="sourceLineNo">123</span> private enum ScanControllerState {<a name="line.123"></a> -<span class="sourceLineNo">124</span> INITIALIZED, SUSPENDED, TERMINATED, DESTROYED<a name="line.124"></a> -<span class="sourceLineNo">125</span> }<a name="line.125"></a> -<span class="sourceLineNo">126</span><a name="line.126"></a> -<span class="sourceLineNo">127</span> // Since suspend and terminate should only be called within onNext or onHeartbeat(see the comments<a name="line.127"></a> -<span class="sourceLineNo">128</span> // of RawScanResultConsumer.onNext and onHeartbeat), we need to add some check to prevent invalid<a name="line.128"></a> -<span class="sourceLineNo">129</span> // usage. We use two things to prevent invalid usage:<a name="line.129"></a> -<span class="sourceLineNo">130</span> // 1. Record the thread that construct the ScanControllerImpl instance. We will throw an<a name="line.130"></a> -<span class="sourceLineNo">131</span> // IllegalStateException if the caller thread is not this thread.<a name="line.131"></a> -<span class="sourceLineNo">132</span> // 2. The ControllerState. The initial state is INITIALIZED, if you call suspend, the state will<a name="line.132"></a> -<span class="sourceLineNo">133</span> // be transformed to SUSPENDED, and if you call terminate, the state will be transformed to<a name="line.133"></a> -<span class="sourceLineNo">134</span> // TERMINATED. And when we are back from onNext or onHeartbeat in the onComplete method, we will<a name="line.134"></a> -<span class="sourceLineNo">135</span> // call destroy to get the current state and set the state to DESTROYED. And when user calls<a name="line.135"></a> -<span class="sourceLineNo">136</span> // suspend or terminate, we will check if the current state is INITIALIZED, if not we will throw<a name="line.136"></a> -<span class="sourceLineNo">137</span> // an IllegalStateException. Notice that the DESTROYED state is necessary as you may not call<a name="line.137"></a> -<span class="sourceLineNo">138</span> // suspend or terminate so the state will still be INITIALIZED when back from onNext or<a name="line.138"></a> -<span class="sourceLineNo">139</span> // onHeartbeat. We need another state to replace the INITIALIZED state to prevent the controller<a name="line.139"></a> -<span class="sourceLineNo">140</span> // to be used in the future.<a name="line.140"></a> -<span class="sourceLineNo">141</span> // Notice that, the public methods of this class is supposed to be called by upper layer only, and<a name="line.141"></a> -<span class="sourceLineNo">142</span> // package private methods can only be called within the implementation of<a name="line.142"></a> -<span class="sourceLineNo">143</span> // AsyncScanSingleRegionRpcRetryingCaller.<a name="line.143"></a> -<span class="sourceLineNo">144</span> private final class ScanControllerImpl implements RawScanResultConsumer.ScanController {<a name="line.144"></a> -<span class="sourceLineNo">145</span><a name="line.145"></a> -<span class="sourceLineNo">146</span> // Make sure the methods are only called in this thread.<a name="line.146"></a> -<span class="sourceLineNo">147</span> private final Thread callerThread = Thread.currentThread();<a name="line.147"></a> -<span class="sourceLineNo">148</span><a name="line.148"></a> -<span class="sourceLineNo">149</span> // INITIALIZED -> SUSPENDED -> DESTROYED<a name="line.149"></a> -<span class="sourceLineNo">150</span> // INITIALIZED -> TERMINATED -> DESTROYED<a name="line.150"></a> -<span class="sourceLineNo">151</span> // INITIALIZED -> DESTROYED<a name="line.151"></a> -<span class="sourceLineNo">152</span> // If the state is incorrect we will throw IllegalStateException.<a name="line.152"></a> -<span class="sourceLineNo">153</span> private ScanControllerState state = ScanControllerState.INITIALIZED;<a name="line.153"></a> -<span class="sourceLineNo">154</span><a name="line.154"></a> -<span class="sourceLineNo">155</span> private ScanResumerImpl resumer;<a name="line.155"></a> -<span class="sourceLineNo">156</span><a name="line.156"></a> -<span class="sourceLineNo">157</span> private void preCheck() {<a name="line.157"></a> -<span class="sourceLineNo">158</span> Preconditions.checkState(Thread.currentThread() == callerThread,<a name="line.158"></a> -<span class="sourceLineNo">159</span> "The current thread is %s, expected thread is %s, " +<a name="line.159"></a> -<span class="sourceLineNo">160</span> "you should not call this method outside onNext or onHeartbeat",<a name="line.160"></a> -<span class="sourceLineNo">161</span> Thread.currentThread(), callerThread);<a name="line.161"></a> -<span class="sourceLineNo">162</span> Preconditions.checkState(state.equals(ScanControllerState.INITIALIZED),<a name="line.162"></a> -<span class="sourceLineNo">163</span> "Invalid Stopper state %s", state);<a name="line.163"></a> +<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.56"></a> +<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.57"></a> +<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.shaded.protobuf.ResponseConverter;<a name="line.58"></a> +<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService;<a name="line.59"></a> +<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService.Interface;<a name="line.60"></a> +<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest;<a name="line.61"></a> +<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse;<a name="line.62"></a> +<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.63"></a> +<span class="sourceLineNo">064</span><a name="line.64"></a> +<span class="sourceLineNo">065</span>/**<a name="line.65"></a> +<span class="sourceLineNo">066</span> * Retry caller for scanning a region.<a name="line.66"></a> +<span class="sourceLineNo">067</span> * <p><a name="line.67"></a> +<span class="sourceLineNo">068</span> * We will modify the {@link Scan} object 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> +<span class="sourceLineNo">070</span> */<a name="line.70"></a> +<span class="sourceLineNo">071</span>@InterfaceAudience.Private<a name="line.71"></a> +<span class="sourceLineNo">072</span>class AsyncScanSingleRegionRpcRetryingCaller {<a name="line.72"></a> +<span class="sourceLineNo">073</span><a name="line.73"></a> +<span class="sourceLineNo">074</span> private static final Log LOG = LogFactory.getLog(AsyncScanSingleRegionRpcRetryingCaller.class);<a name="line.74"></a> +<span class="sourceLineNo">075</span><a name="line.75"></a> +<span class="sourceLineNo">076</span> private final HashedWheelTimer retryTimer;<a name="line.76"></a> +<span class="sourceLineNo">077</span><a name="line.77"></a> +<span class="sourceLineNo">078</span> private final Scan scan;<a name="line.78"></a> +<span class="sourceLineNo">079</span><a name="line.79"></a> +<span class="sourceLineNo">080</span> private final ScanMetrics scanMetrics;<a name="line.80"></a> +<span class="sourceLineNo">081</span><a name="line.81"></a> +<span class="sourceLineNo">082</span> private final long scannerId;<a name="line.82"></a> +<span class="sourceLineNo">083</span><a name="line.83"></a> +<span class="sourceLineNo">084</span> private final ScanResultCache resultCache;<a name="line.84"></a> +<span class="sourceLineNo">085</span><a name="line.85"></a> +<span class="sourceLineNo">086</span> private final RawScanResultConsumer consumer;<a name="line.86"></a> +<span class="sourceLineNo">087</span><a name="line.87"></a> +<span class="sourceLineNo">088</span> private final ClientService.Interface stub;<a name="line.88"></a> +<span class="sourceLineNo">089</span><a name="line.89"></a> +<span class="sourceLineNo">090</span> private final HRegionLocation loc;<a name="line.90"></a> +<span class="sourceLineNo">091</span><a name="line.91"></a> +<span class="sourceLineNo">092</span> private final boolean regionServerRemote;<a name="line.92"></a> +<span class="sourceLineNo">093</span><a name="line.93"></a> +<span class="sourceLineNo">094</span> private final long scannerLeaseTimeoutPeriodNs;<a name="line.94"></a> +<span class="sourceLineNo">095</span><a name="line.95"></a> +<span class="sourceLineNo">096</span> private final long pauseNs;<a name="line.96"></a> +<span class="sourceLineNo">097</span><a name="line.97"></a> +<span class="sourceLineNo">098</span> private final int maxAttempts;<a name="line.98"></a> +<span class="sourceLineNo">099</span><a name="line.99"></a> +<span class="sourceLineNo">100</span> private final long scanTimeoutNs;<a name="line.100"></a> +<span class="sourceLineNo">101</span><a name="line.101"></a> +<span class="sourceLineNo">102</span> private final long rpcTimeoutNs;<a name="line.102"></a> +<span class="sourceLineNo">103</span><a name="line.103"></a> +<span class="sourceLineNo">104</span> private final int startLogErrorsCnt;<a name="line.104"></a> +<span class="sourceLineNo">105</span><a name="line.105"></a> +<span class="sourceLineNo">106</span> private final Runnable completeWhenNoMoreResultsInRegion;<a name="line.106"></a> +<span class="sourceLineNo">107</span><a name="line.107"></a> +<span class="sourceLineNo">108</span> private final CompletableFuture<Boolean> future;<a name="line.108"></a> +<span class="sourceLineNo">109</span><a name="line.109"></a> +<span class="sourceLineNo">110</span> private final HBaseRpcController controller;<a name="line.110"></a> +<span class="sourceLineNo">111</span><a name="line.111"></a> +<span class="sourceLineNo">112</span> private byte[] nextStartRowWhenError;<a name="line.112"></a> +<span class="sourceLineNo">113</span><a name="line.113"></a> +<span class="sourceLineNo">114</span> private boolean includeNextStartRowWhenError;<a name="line.114"></a> +<span class="sourceLineNo">115</span><a name="line.115"></a> +<span class="sourceLineNo">116</span> private long nextCallStartNs;<a name="line.116"></a> +<span class="sourceLineNo">117</span><a name="line.117"></a> +<span class="sourceLineNo">118</span> private int tries;<a name="line.118"></a> +<span class="sourceLineNo">119</span><a name="line.119"></a> +<span class="sourceLineNo">120</span> private final List<RetriesExhaustedException.ThrowableWithExtraContext> 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> +<span class="sourceLineNo">123</span><a name="line.123"></a> +<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> +<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> // 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> +<span class="sourceLineNo">144</span> // AsyncScanSingleRegionRpcRetryingCaller.<a name="line.144"></a> +<span class="sourceLineNo">145</span> private final class ScanControllerImpl implements RawScanResultConsumer.ScanController {<a name="line.145"></a> +<span class="sourceLineNo">146</span><a name="line.146"></a> +<span class="sourceLineNo">147</span> // Make sure the methods are only called in this thread.<a name="line.147"></a> +<span class="sourceLineNo">148</span> private final Thread callerThread;<a name="line.148"></a> +<span class="sourceLineNo">149</span><a name="line.149"></a> +<span class="sourceLineNo">150</span> private final Optional<Cursor> cursor;<a name="line.150"></a> +<span class="sourceLineNo">151</span><a name="line.151"></a> +<span class="sourceLineNo">152</span> // INITIALIZED -> SUSPENDED -> DESTROYED<a name="line.152"></a> +<span class="sourceLineNo">153</span> // INITIALIZED -> TERMINATED -> DESTROYED<a name="line.153"></a> +<span class="sourceLineNo">154</span> // INITIALIZED -> 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> +<span class="sourceLineNo">156</span> private ScanControllerState state = ScanControllerState.INITIALIZED;<a name="line.156"></a> +<span class="sourceLineNo">157</span><a name="line.157"></a> +<span class="sourceLineNo">158</span> private ScanResumerImpl resumer;<a name="line.158"></a> +<span class="sourceLineNo">159</span><a name="line.159"></a> +<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">164</span> }<a name="line.164"></a> <span class="sourceLineNo">165</span><a name="line.165"></a> -<span class="sourceLineNo">166</span> @Override<a name="line.166"></a> -<span class="sourceLineNo">167</span> public ScanResumer suspend() {<a name="line.167"></a> -<span class="sourceLineNo">168</span> preCheck();<a name="line.168"></a> -<span class="sourceLineNo">169</span> state = ScanControllerState.SUSPENDED;<a name="line.169"></a> -<span class="sourceLineNo">170</span> ScanResumerImpl resumer = new ScanResumerImpl();<a name="line.170"></a> -<span class="sourceLineNo">171</span> this.resumer = resumer;<a name="line.171"></a> -<span class="sourceLineNo">172</span> return resumer;<a name="line.172"></a> +<span class="sourceLineNo">166</span> private void preCheck() {<a name="line.166"></a> +<span class="sourceLineNo">167</span> Preconditions.checkState(Thread.currentThread() == callerThread,<a name="line.167"></a> +<span class="sourceLineNo">168</span> "The current thread is %s, expected thread is %s, " +<a name="line.168"></a> +<span class="sourceLineNo">169</span> "you should not call this method outside onNext or onHeartbeat",<a name="line.169"></a> +<span class="sourceLineNo">170</span> Thread.currentThread(), callerThread);<a name="line.170"></a> +<span class="sourceLineNo">171</span> Preconditions.checkState(state.equals(ScanControllerState.INITIALIZED),<a name="line.171"></a> +<span class="sourceLineNo">172</span> "Invalid Stopper state %s", state);<a name="line.172"></a> <span class="sourceLineNo">173</span> }<a name="line.173"></a> <span class="sourceLineNo">174</span><a name="line.174"></a> <span class="sourceLineNo">175</span> @Override<a name="line.175"></a> -<span class="sourceLineNo">176</span> public void terminate() {<a name="line.176"></a> +<span class="sourceLineNo">176</span> public ScanResumer suspend() {<a name="line.176"></a> <span class="sourceLineNo">177</span> preCheck();<a name="line.177"></a> -<span class="sourceLineNo">178</span> state = ScanControllerState.TERMINATED;<a name="line.178"></a> -<span class="sourceLineNo">179</span> }<a name="line.179"></a> -<span class="sourceLineNo">180</span><a name="line.180"></a> -<span class="sourceLineNo">181</span> // return the current state, and set the state to DESTROYED.<a name="line.181"></a> -<span class="sourceLineNo">182</span> ScanControllerState destroy() {<a name="line.182"></a> -<span class="sourceLineNo">183</span> ScanControllerState state = this.state;<a name="line.183"></a> -<span class="sourceLineNo">184</span> this.state = ScanControllerState.DESTROYED;<a name="line.184"></a> -<span class="sourceLineNo">185</span> return state;<a name="line.185"></a> -<span class="sourceLineNo">186</span> }<a name="line.186"></a> -<span class="sourceLineNo">187</span> }<a name="line.187"></a> -<span class="sourceLineNo">188</span><a name="line.188"></a> -<span class="sourceLineNo">189</span> private enum ScanResumerState {<a name="line.189"></a> -<span class="sourceLineNo">190</span> INITIALIZED, SUSPENDED, RESUMED<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> // The resume method is allowed to be called in another thread so here we also use the<a name="line.193"></a> -<span class="sourceLineNo">194</span> // ResumerState to prevent race. The initial state is INITIALIZED, and in most cases, when back<a name="line.194"></a> -<span class="sourceLineNo">195</span> // from onNext or onHeartbeat, we will call the prepare method to change the state to SUSPENDED,<a name="line.195"></a> -<span class="sourceLineNo">196</span> // and when user calls resume method, we will change the state to RESUMED. But the resume method<a name="line.196"></a> -<span class="sourceLineNo">197</span> // could be called in other thread, and in fact, user could just do this:<a name="line.197"></a> -<span class="sourceLineNo">198</span> // controller.suspend().resume()<a name="line.198"></a> -<span class="sourceLineNo">199</span> // This is strange but valid. This means the scan could be resumed before we call the prepare<a name="line.199"></a> -<span class="sourceLineNo">200</span> // method to do the actual suspend work. So in the resume method, we will check if the state is<a name="line.200"></a> -<span class="sourceLineNo">201</span> // INTIALIZED, if it is, then we will just set the state to RESUMED and return. And in prepare<a name="line.201"></a> -<span class="sourceLineNo">202</span> // method, if the state is RESUMED already, we will just return an let the scan go on.<a name="line.202"></a> -<span class="sourceLineNo">203</span> // Notice that, the public methods of this class is supposed to be called by upper layer only, and<a name="line.203"></a> -<span class="sourceLineNo">204</span> // package private methods can only be called within the implementation of<a name="line.204"></a> -<span class="sourceLineNo">205</span> // AsyncScanSingleRegionRpcRetryingCaller.<a name="line.205"></a> -<span class="sourceLineNo">206</span> private final class ScanResumerImpl implements RawScanResultConsumer.ScanResumer {<a name="line.206"></a> -<span class="sourceLineNo">207</span><a name="line.207"></a> -<span class="sourceLineNo">208</span> // INITIALIZED -> SUSPENDED -> RESUMED<a name="line.208"></a> -<span class="sourceLineNo">209</span> // INITIALIZED -> RESUMED<a name="line.209"></a> -<span class="sourceLineNo">210</span> private ScanResumerState state = ScanResumerState.INITIALIZED;<a name="line.210"></a> -<span class="sourceLineNo">211</span><a name="line.211"></a> -<span class="sourceLineNo">212</span> private ScanResponse resp;<a name="line.212"></a> -<span class="sourceLineNo">213</span><a name="line.213"></a> -<span class="sourceLineNo">214</span> private int numberOfCompleteRows;<a name="line.214"></a> -<span class="sourceLineNo">215</span><a name="line.215"></a> -<span class="sourceLineNo">216</span> // If the scan is suspended successfully, we need to do lease renewal to prevent it being closed<a name="line.216"></a> -<span class="sourceLineNo">217</span> // by RS due to lease expire. It is a one-time timer task so we need to schedule a new task<a name="line.217"></a> -<span class="sourceLineNo">218</span> // every time when the previous task is finished. There could also be race as the renewal is<a name="line.218"></a> -<span class="sourceLineNo">219</span> // executed in the timer thread, so we also need to check the state before lease renewal. If the<a name="line.219"></a> -<span class="sourceLineNo">220</span> // state is RESUMED already, we will give up lease renewal and also not schedule the next lease<a name="line.220"></a> -<span class="sourceLineNo">221</span> // renewal task.<a name="line.221"></a> -<span class="sourceLineNo">222</span> private Timeout leaseRenewer;<a name="line.222"></a> -<span class="sourceLineNo">223</span><a name="line.223"></a> -<span class="sourceLineNo">224</span> @Override<a name="line.224"></a> -<span class="sourceLineNo">225</span> public void resume() {<a name="line.225"></a> -<span class="sourceLineNo">226</span> // just used to fix findbugs warnings. In fact, if resume is called before prepare, then we<a name="line.226"></a> -<span class="sourceLineNo">227</span> // just return at the first if condition without loading the resp and numValidResuls field. If<a name="line.227"></a> -<span class="sourceLineNo">228</span> // resume is called after suspend, then it is also safe to just reference resp and<a name="line.228"></a> -<span class="sourceLineNo">229</span> // numValidResults after the synchronized block as no one will change it anymore.<a name="line.229"></a> -<span class="sourceLineNo">230</span> ScanResponse localResp;<a name="line.230"></a> -<span class="sourceLineNo">231</span> int localNumberOfCompleteRows;<a name="line.231"></a> -<span class="sourceLineNo">232</span> synchronized (this) {<a name="line.232"></a> -<span class="sourceLineNo">233</span> if (state == ScanResumerState.INITIALIZED) {<a name="line.233"></a> -<span class="sourceLineNo">234</span> // user calls this method before we call prepare, so just set the state to<a name="line.234"></a> -<span class="sourceLineNo">235</span> // RESUMED, the implementation will just go on.<a name="line.235"></a> -<span class="sourceLineNo">236</span> state = ScanResumerState.RESUMED;<a name="line.236"></a> -<span class="sourceLineNo">237</span> return;<a name="line.237"></a> -<span class="sourceLineNo">238</span> }<a name="line.238"></a> -<span class="sourceLineNo">239</span> if (state == ScanResumerState.RESUMED) {<a name="line.239"></a> -<span class="sourceLineNo">240</span> // already resumed, give up.<a name="line.240"></a> -<span class="sourceLineNo">241</span> return;<a name="line.241"></a> -<span class="sourceLineNo">242</span> }<a name="line.242"></a> -<span class="sourceLineNo">243</span> state = ScanResumerState.RESUMED;<a name="line.243"></a> -<span class="sourceLineNo">244</span> if (leaseRenewer != null) {<a name="line.244"></a> -<span class="sourceLineNo">245</span> leaseRenewer.cancel();<a name="line.245"></a> -<span class="sourceLineNo">246</span> }<a name="line.246"></a> -<span class="sourceLineNo">247</span> localResp = this.resp;<a name="line.247"></a> -<span class="sourceLineNo">248</span> localNumberOfCompleteRows = this.numberOfCompleteRows;<a name="line.248"></a> -<span class="sourceLineNo">249</span> }<a name="line.249"></a> -<span class="sourceLineNo">250</span> completeOrNext(localResp, localNumberOfCompleteRows);<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 scheduleRenewLeaseTask() {<a name="line.253"></a> -<span class="sourceLineNo">254</span> leaseRenewer = retryTimer.newTimeout(t -> tryRenewLease(), scannerLeaseTimeoutPeriodNs / 2,<a name="line.254"></a> -<span class="sourceLineNo">255</span> TimeUnit.NANOSECONDS);<a name="line.255"></a> -<span class="sourceLineNo">256</span> }<a name="line.256"></a> -<span class="sourceLineNo">257</span><a name="line.257"></a> -<span class="sourceLineNo">258</span> private synchronized void tryRenewLease() {<a name="line.258"></a> -<span class="sourceLineNo">259</span> // the scan has already been resumed, give up<a name="line.259"></a> -<span class="sourceLineNo">260</span> if (state == ScanResumerState.RESUMED) {<a name="line.260"></a> -<span class="sourceLineNo">261</span> return;<a name="line.261"></a> -<span class="sourceLineNo">262</span> }<a name="line.262"></a> -<span class="sourceLineNo">263</span> renewLease();<a name="line.263"></a> -<span class="sourceLineNo">264</span> // schedule the next renew lease task again as this is a one-time task.<a name="line.264"></a> -<span class="sourceLineNo">265</span> scheduleRenewLeaseTask();<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> // return false if the scan has already been resumed. See the comment above for ScanResumerImpl<a name="line.268"></a> -<span class="sourceLineNo">269</span> // for more details.<a name="line.269"></a> -<span class="sourceLineNo">270</span> synchronized boolean prepare(ScanResponse resp, int numberOfCompleteRows) {<a name="line.270"></a> -<span class="sourceLineNo">271</span> if (state == ScanResumerState.RESUMED) {<a name="line.271"></a> -<span class="sourceLineNo">272</span> // user calls resume before we actually suspend the scan, just continue;<a name="line.272"></a> -<span class="sourceLineNo">273</span> return false;<a name="line.273"></a> -<span class="sourceLineNo">274</span> }<a name="line.274"></a> -<span class="sourceLineNo">275</span> state = ScanResumerState.SUSPENDED;<a name="line.275"></a> -<span class="sourceLineNo">276</span> this.resp = resp;<a name="line.276"></a> -<span class="sourceLineNo">277</span> this.numberOfCompleteRows = numberOfCompleteRows;<a name="line.277"></a> -<span class="sourceLineNo">278</span> // if there are no more results in region then the scanner at RS side will be closed<a name="line.278"></a> -<span class="sourceLineNo">279</span> // automatically so we do not need to renew lease.<a name="line.279"></a> -<span class="sourceLineNo">280</span> if (resp.getMoreResultsInRegion()) {<a name="line.280"></a> -<span class="sourceLineNo">281</span> // schedule renew lease task<a name="line.281"></a> -<span class="sourceLineNo">282</span> scheduleRenewLeaseTask();<a name="line.282"></a> -<span class="sourceLineNo">283</span> }<a name="line.283"></a> -<span class="sourceLineNo">284</span> return true;<a name="line.284"></a> -<span class="sourceLineNo">285</span> }<a name="line.285"></a> -<span class="sourceLineNo">286</span> }<a name="line.286"></a> -<span class="sourceLineNo">287</span><a name="line.287"></a> -<span class="sourceLineNo">288</span> public AsyncScanSingleRegionRpcRetryingCaller(HashedWheelTimer retryTimer,<a name="line.288"></a> -<span class="sourceLineNo">289</span> AsyncConnectionImpl conn, Scan scan, ScanMetrics scanMetrics, long scannerId,<a name="line.289"></a> -<span class="sourceLineNo">290</span> ScanResultCache resultCache, RawScanResultConsumer consumer, Interface stub,<a name="line.290"></a> -<span class="sourceLineNo">291</span> HRegionLocation loc, boolean isRegionServerRemote, long scannerLeaseTimeoutPeriodNs,<a name="line.291"></a> -<span class="sourceLineNo">292</span> long pauseNs, int maxAttempts, long scanTimeoutNs, long rpcTimeoutNs, int startLogErrorsCnt) {<a name="line.292"></a> -<span class="sourceLineNo">293</span> this.retryTimer = retryTimer;<a name="line.293"></a> -<span class="sourceLineNo">294</span> this.scan = scan;<a name="line.294"></a> -<span class="sourceLineNo">295</span> this.scanMetrics = scanMetrics;<a name="line.295"></a> -<span class="sourceLineNo">296</span> this.scannerId = scannerId;<a name="line.296"></a> -<span class="sourceLineNo">297</span> this.resultCache = resultCache;<a name="line.297"></a> -<span class="sourceLineNo">298</span> this.consumer = consumer;<a name="line.298"></a> -<span class="sourceLineNo">299</span> this.stub = stub;<a name="line.299"></a> -<span class="sourceLineNo">300</span> this.loc = loc;<a name="line.300"></a> -<span class="sourceLineNo">301</span> this.regionServerRemote = isRegionServerRemote;<a name="line.301"></a> -<span class="sourceLineNo">302</span> this.scannerLeaseTimeoutPeriodNs = scannerLeaseTimeoutPeriodNs;<a name="line.302"></a> -<span class="sourceLineNo">303</span> this.pauseNs = pauseNs;<a name="line.303"></a> -<span class="sourceLineNo">304</span> this.maxAttempts = maxAttempts;<a name="line.304"></a> -<span class="sourceLineNo">305</span> this.scanTimeoutNs = scanTimeoutNs;<a name="line.305"></a> -<span class="sourceLineNo">306</span> this.rpcTimeoutNs = rpcTimeoutNs;<a name="line.306"></a> -<span class="sourceLineNo">307</span> this.startLogErrorsCnt = startLogErrorsCnt;<a name="line.307"></a> -<span class="sourceLineNo">308</span> if (scan.isReversed()) {<a name="line.308"></a> -<span class="sourceLineNo">309</span> completeWhenNoMoreResultsInRegion = this::completeReversedWhenNoMoreResultsInRegion;<a name="line.309"></a> -<span class="sourceLineNo">310</span> } else {<a name="line.310"></a> -<span class="sourceLineNo">311</span> completeWhenNoMoreResultsInRegion = this::completeWhenNoMoreResultsInRegion;<a name="line.311"></a> -<span class="sourceLineNo">312</span> }<a name="line.312"></a> -<span class="sourceLineNo">313</span> this.future = new CompletableFuture<>();<a name="line.313"></a> -<span class="sourceLineNo">314</span> this.controller = conn.rpcControllerFactory.newController();<a name="line.314"></a> -<span class="sourceLineNo">315</span> this.exceptions = new ArrayList<>();<a name="line.315"></a> -<span class="sourceLineNo">316</span> }<a name="line.316"></a> -<span class="sourceLineNo">317</span><a name="line.317"></a> -<span class="sourceLineNo">318</span> private long elapsedMs() {<a name="line.318"></a> -<span class="sourceLineNo">319</span> return TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - nextCallStartNs);<a name="line.319"></a> -<span class="sourceLineNo">320</span> }<a name="line.320"></a> -<span class="sourceLineNo">321</span><a name="line.321"></a> -<span class="sourceLineNo">322</span> private long remainingTimeNs() {<a name="line.322"></a> -<span class="sourceLineNo">323</span> return scanTimeoutNs - (System.nanoTime() - nextCallStartNs);<a name="line.323"></a> -<span class="sourceLineNo">324</span> }<a name="line.324"></a> -<span class="sourceLineNo">325</span><a name="line.325"></a> -<span class="sourceLineNo">326</span> private void closeScanner() {<a name="line.326"></a> -<span class="sourceLineNo">327</span> incRPCCallsMetrics(scanMetrics, regionServerRemote);<a name="line.327"></a> -<span class="sourceLineNo">328</span> resetController(controller, rpcTimeoutNs);<a name="line.328"></a> -<span class="sourceLineNo">329</span> ScanRequest req = RequestConverter.buildScanRequest(this.scannerId, 0, true, false);<a name="line.329"></a> -<span class="sourceLineNo">330</span> stub.scan(controller, req, resp -> {<a name="line.330"></a> -<span class="sourceLineNo">331</span> if (controller.failed()) {<a name="line.331"></a> -<span class="sourceLineNo">332</span> LOG.warn("Call to " + loc.getServerName() + " for closing scanner id = " + scannerId +<a name="line.332"></a> -<span class="sourceLineNo">333</span> " for " + loc.getRegionInfo().getEncodedName() + " of " +<a name="line.333"></a> -<span class="sourceLineNo">334</span> loc.getRegionInfo().getTable() + " failed, ignore, probably already closed",<a name="line.334"></a> -<span class="sourceLineNo">335</span> controller.getFailed());<a name="line.335"></a> -<span class="sourceLineNo">336</span> }<a name="line.336"></a> -<span class="sourceLineNo">337</span> });<a name="line.337"></a> +<span class="sourceLineNo">178</span> state = ScanControllerState.SUSPENDED;<a name="line.178"></a> +<span class="sourceLineNo">179</span> ScanResumerImpl resumer = new ScanResumerImpl();<a name="line.179"></a> +<span class="sourceLineNo">180</span> this.resumer = resumer;<a name="line.180"></a> +<span class="sourceLineNo">181</span> return resumer;<a name="line.181"></a> +<span class="sourceLineNo">182</span> }<a name="line.182"></a> +<span class="sourceLineNo">183</span><a name="line.183"></a> +<span class="sourceLineNo">184</span> @Override<a name="line.184"></a> +<span class="sourceLineNo">185</span> public void terminate() {<a name="line.185"></a> +<span class="sourceLineNo">186</span> preCheck();<a name="line.186"></a> +<span class="sourceLineNo">187</span> state = ScanControllerState.TERMINATED;<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> // return the current state, and set the state to DESTROYED.<a name="line.190"></a> +<span class="sourceLineNo">191</span> ScanControllerState destroy() {<a name="line.191"></a> +<span class="sourceLineNo">192</span> ScanControllerState state = this.state;<a name="line.192"></a> +<span class="sourceLineNo">193</span> this.state = ScanControllerState.DESTROYED;<a name="line.193"></a> +<span class="sourceLineNo">194</span> return state;<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> @Override<a name="line.197"></a> +<span class="sourceLineNo">198</span> public Optional<Cursor> cursor() {<a name="line.198"></a> +<span class="sourceLineNo">199</span> return cursor;<a name="line.199"></a> +<span class="sourceLineNo">200</span> }<a name="line.200"></a> +<span class="sourceLineNo">201</span> }<a name="line.201"></a> +<span class="sourceLineNo">202</span><a name="line.202"></a> +<span class="sourceLineNo">203</span> private enum ScanResumerState {<a name="line.203"></a> +<span class="sourceLineNo">204</span> INITIALIZED, SUSPENDED, RESUMED<a name="line.204"></a> +<span class="sourceLineNo">205</span> }<a name="line.205"></a> +<span class="sourceLineNo">206</span><a name="line.206"></a> +<span class="sourceLineNo">207</span> // The resume method is allowed to be called in another thread so here we also use the<a name="line.207"></a> +<span class="sourceLineNo">208</span> // ResumerState to prevent race. The initial state is INITIALIZED, and in most cases, when back<a name="line.208"></a> +<span class="sourceLineNo">209</span> // from onNext or onHeartbeat, we will call the prepare method to change the state to SUSPENDED,<a name="line.209"></a> +<span class="sourceLineNo">210</span> // and when user calls resume method, we will change the state to RESUMED. But the resume method<a name="line.210"></a> +<span class="sourceLineNo">211</span> // could be called in other thread, and in fact, user could just do this:<a name="line.211"></a> +<span class="sourceLineNo">212</span> // controller.suspend().resume()<a name="line.212"></a> +<span class="sourceLineNo">213</span> // This is strange but valid. This means the scan could be resumed before we call the prepare<a name="line.213"></a> +<span class="sourceLineNo">214</span> // method to do the actual suspend work. So in the resume method, we will check if the state is<a name="line.214"></a> +<span class="sourceLineNo">215</span> // INTIALIZED, if it is, then we will just set the state to RESUMED and return. And in prepare<a name="line.215"></a> +<span class="sourceLineNo">216</span> // method, if the state is RESUMED already, we will just return an let the scan go on.<a name="line.216"></a> +<span class="sourceLineNo">217</span> // Notice that, the public methods of this class is supposed to be called by upper layer only, and<a name="line.217"></a> +<span class="sourceLineNo">218</span> // package private methods can only be called within the implementation of<a name="line.218"></a> +<span class="sourceLineNo">219</span> // AsyncScanSingleRegionRpcRetryingCaller.<a name="line.219"></a> +<span class="sourceLineNo">220</span> private final class ScanResumerImpl implements RawScanResultConsumer.ScanResumer {<a name="line.220"></a> +<span class="sourceLineNo">221</span><a name="line.221"></a> +<span class="sourceLineNo">222</span> // INITIALIZED -> SUSPENDED -> RESUMED<a name="line.222"></a> +<span class="sourceLineNo">223</span> // INITIALIZED -> RESUMED<a name="line.223"></a> +<span class="sourceLineNo">224</span> private ScanResumerState state = ScanResumerState.INITIALIZED;<a name="line.224"></a> +<span class="sourceLineNo">225</span><a name="line.225"></a> +<span class="sourceLineNo">226</span> private ScanResponse resp;<a name="line.226"></a> +<span class="sourceLineNo">227</span><a name="line.227"></a> +<span class="sourceLineNo">228</span> private int numberOfCompleteRows;<a name="line.228"></a> +<span class="sourceLineNo">229</span><a name="line.229"></a> +<span class="sourceLineNo">230</span> // If the scan is suspended successfully, we need to do lease renewal to prevent it being closed<a name="line.230"></a> +<span class="sourceLineNo">231</span> // by RS due to lease expire. It is a one-time timer task so we need to schedule a new task<a name="line.231"></a> +<span class="sourceLineNo">232</span> // every time when the previous task is finished. There could also be race as the renewal is<a name="line.232"></a> +<span class="sourceLineNo">233</span> // executed in the timer thread, so we also need to check the state before lease renewal. If the<a name="line.233"></a> +<span class="sourceLineNo">234</span> // state is RESUMED already, we will give up lease renewal and also not schedule the next lease<a name="line.234"></a> +<span class="sourceLineNo">235</span> // renewal task.<a name="line.235"></a> +<span class="sourceLineNo">236</span> private Timeout leaseRenewer;<a name="line.236"></a> +<span class="sourceLineNo">237</span><a name="line.237"></a> +<span class="sourceLineNo">238</span> @Override<a name="line.238"></a> +<span class="sourceLineNo">239</span> public void resume() {<a name="line.239"></a> +<span class="sourceLineNo">240</span> // just used to fix findbugs warnings. In fact, if resume is called before prepare, then we<a name="line.240"></a> +<span class="sourceLineNo">241</span> // just return at the first if condition without loading the resp and numValidResuls field. If<a name="line.241"></a> +<span class="sourceLineNo">242</span> // resume is called after suspend, then it is also safe to just reference resp and<a name="line.242"></a> +<span class="sourceLineNo">243</span> // numValidResults after the synchronized block as no one will change it anymore.<a name="line.243"></a> +<span class="sourceLineNo">244</span> ScanResponse localResp;<a name="line.244"></a> +<span class="sourceLineNo">245</span> int localNumberOfCompleteRows;<a name="line.245"></a> +<span class="sourceLineNo">246</span> synchronized (this) {<a name="line.246"></a> +<span class="sourceLineNo">247</span> if (state == ScanResumerState.INITIALIZED) {<a name="line.247"></a> +<span class="sourceLineNo">248</span> // user calls this method before we call prepare, so just set the state to<a name="line.248"></a> +<span class="sourceLineNo">249</span> // RESUMED, the implementation will just go on.<a name="line.249"></a> +<span class="sourceLineNo">250</span> state = ScanResumerState.RESUMED;<a name="line.250"></a> +<span class="sourceLineNo">251</span> return;<a name="line.251"></a> +<span class="sourceLineNo">252</span> }<a name="line.252"></a> +<span class="sourceLineNo">253</span> if (state == ScanResumerState.RESUMED) {<a name="line.253"></a> +<span class="sourceLineNo">254</span> // already resumed, give up.<a name="line.254"></a> +<span class="sourceLineNo">255</span> return;<a name="line.255"></a> +<span class="sourceLineNo">256</span> }<a name="line.256"></a> +<span class="sourceLineNo">257</span> state = ScanResumerState.RESUMED;<a name="line.257"></a> +<span class="sourceLineNo">258</span> if (leaseRenewer != null) {<a name="line.258"></a> +<span class="sourceLineNo">259</span> leaseRenewer.cancel();<a name="line.259"></a> +<span class="sourceLineNo">260</span> }<a name="line.260"></a> +<span class="sourceLineNo">261</span> localResp = this.resp;<a name="line.261"></a> +<span class="sourceLineNo">262</span> localNumberOfCompleteRows = this.numberOfCompleteRows;<a name="line.262"></a> +<span class="sourceLineNo">263</span> }<a name="line.263"></a> +<span class="sourceLineNo">264</span> completeOrNext(localResp, localNumberOfCompleteRows);<a name="line.264"></a> +<span class="sourceLineNo">265</span> }<a name="line.265"></a> +<span class="sourceLineNo">266</span><a name="line.266"></a> +<span class="sourceLineNo">267</span> private void scheduleRenewLeaseTask() {<a name="line.267"></a> +<span class="sourceLineNo">268</span> leaseRenewer = retryTimer.newTimeout(t -> tryRenewLease(), scannerLeaseTimeoutPeriodNs / 2,<a name="line.268"></a> +<span class="sourceLineNo">269</span> TimeUnit.NANOSECONDS);<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> private synchronized void tryRenewLease() {<a name="line.272"></a> +<span class="sourceLineNo">273</span> // the scan has already been resumed, give up<a name="line.273"></a> +<span class="sourceLineNo">274</span> if (state == ScanResumerState.RESUMED) {<a name="line.274"></a> +<span class="sourceLineNo">275</span> return;<a name="line.275"></a> +<span class="sourceLineNo">276</span> }<a name="line.276"></a> +<span class="sourceLineNo">277</span> renewLease();<a name="line.277"></a> +<span class="sourceLineNo">278</span> // schedule the next renew lease task again as this is a one-time task.<a name="line.278"></a> +<span class="sourceLineNo">279</span> scheduleRenewLeaseTask();<a name="line.279"></a> +<span class="sourceLineNo">280</span> }<a name="line.280"></a> +<span class="sourceLineNo">281</span><a name="line.281"></a> +<span class="sourceLineNo">282</span> // return false if the scan has already been resumed. See the comment above for ScanResumerImpl<a name="line.282"></a> +<span class="sourceLineNo">283</span> // for more details.<a name="line.283"></a> +<span class="sourceLineNo">284</span> synchronized boolean prepare(ScanResponse resp, int numberOfCompleteRows) {<a name="line.284"></a> +<span class="sourceLineNo">285</span> if (state == ScanResumerState.RESUMED) {<a name="line.285"></a> +<span class="sourceLineNo">286</span> // user calls resume before we actually suspend the scan, just continue;<a name="line.286"></a> +<span class="sourceLineNo">287</span> return false;<a name="line.287"></a> +<span class="sourceLineNo">288</span> }<a name="line.288"></a> +<span class="sourceLineNo">289</span> state = ScanResumerState.SUSPENDED;<a name="line.289"></a> +<span class="sourceLineNo">290</span> this.resp = resp;<a name="line.290"></a> +<span class="sourceLineNo">291</span> this.numberOfCompleteRows = numberOfCompleteRows;<a name="line.291"></a> +<span class="sourceLineNo">292</span> // if there are no more results in region then the scanner at RS side will be closed<a name="line.292"></a> +<span class="sourceLineNo">293</span> // automatically so we do not need to renew lease.<a name="line.293"></a> +<span class="sourceLineNo">294</span> if (resp.getMoreResultsInRegion()) {<a name="line.294"></a> +<span class="sourceLineNo">295</span> // schedule renew lease task<a name="line.295"></a> +<span class="sourceLineNo">296</span> scheduleRenewLeaseTask();<a name="line.296"></a> +<span class="sourceLineNo">297</span> }<a name="line.297"></a> +<span class="sourceLineNo">298</span> return true;<a name="line.298"></a> +<span class="sourceLineNo">299</span> }<a name="line.299"></a> +<span class="sourceLineNo">300</span> }<a name="line.300"></a> +<span class="sourceLineNo">301</span><a name="line.301"></a> +<span class="sourceLineNo">302</span> public AsyncScanSingleRegionRpcRetryingCaller(HashedWheelTimer retryTimer,<a name="line.302"></a> +<span class="sourceLineNo">303</span> AsyncConnectionImpl conn, Scan scan, ScanMetrics scanMetrics, long scannerId,<a name="line.303"></a> +<span class="sourceLineNo">304</span> ScanResultCache resultCache, RawScanResultConsumer consumer, Interface stub,<a name="line.304"></a> +<span class="sourceLineNo">305</span> HRegionLocation loc, boolean isRegionServerRemote, long scannerLeaseTimeoutPeriodNs,<a name="line.305"></a> +<span class="sourceLineNo">306</span> long pauseNs, int maxAttempts, long scanTimeoutNs, long rpcTimeoutNs, int startLogErrorsCnt) {<a name="line.306"></a> +<span class="sourceLineNo">307</span> this.retryTimer = retryTimer;<a name="line.307"></a> +<span class="sourceLineNo">308</span> this.scan = scan;<a name="line.308"></a> +<span class="sourceLineNo">309</span> this.scanMetrics = scanMetrics;<a name="line.309"></a> +<span class="sourceLineNo">310</span> this.scannerId = scannerId;<a name="line.310"></a> +<span class="sourceLineNo">311</span> this.resultCache = resultCache;<a name="line.311"></a> +<span class="sourceLineNo">312</span> this.consumer = consumer;<a name="line.312"></a> +<span class="sourceLineNo">313</span> this.stub = stub;<a name="line.313"></a> +<span class="sourceLineNo">314</span> this.loc = loc;<a name="line.314"></a> +<span class="sourceLineNo">315</span> this.regionServerRemote = isRegionServerRemote;<a name="line.315"></a> +<span class="sourceLineNo">316</span> this.scannerLeaseTimeoutPeriodNs = scannerLeaseTimeoutPeriodNs;<a name="line.316"></a> +<span class="sourceLineNo">317</span> this.pauseNs = pauseNs;<a name="line.317"></a> +<span class="sourceLineNo">318</span> this.maxAttempts = maxAttempts;<a name="line.318"></a> +<span class="sourceLineNo">319</span> this.scanTimeoutNs = scanTimeoutNs;<a name="line.319"></a> +<span class="sourceLineNo">320</span> this.rpcTimeoutNs = rpcTimeoutNs;<a name="line.320"></a> +<span class="sourceLineNo">321</span> this.startLogErrorsCnt = startLogErrorsCnt;<a name="line.321"></a> +<span class="sourceLineNo">322</span> if (scan.isReversed()) {<a name="line.322"></a> +<span class="sourceLineNo">323</span> completeWhenNoMoreResultsInRegion = this::completeReversedWhenNoMoreResultsInRegion;<a name="line.323"></a> +<span class="sourceLineNo">324</span> } else {<a name="line.324"></a> +<span class="sourceLineNo">325</span> completeWhenNoMoreResultsInRegion = this::completeWhenNoMoreResultsInRegion;<a name="line.325"></a> +<span class="sourceLineNo">326</span> }<a name="line.326"></a> +<span class="sourceLineNo">327</span> this.future = new CompletableFuture<>();<a name="line.327"></a> +<span class="sourceLineNo">328</span> this.controller = conn.rpcControllerFactory.newController();<a name="line.328"></a> +<span class="sourceLineNo">329</span> this.exceptions = new ArrayList<>();<a name="line.329"></a> +<span class="sourceLineNo">330</span> }<a name="line.330"></a> +<span class="sourceLineNo">331</span><a name="line.331"></a> +<span class="sourceLineNo">332</span> private long elapsedMs() {<a 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-<span class="sourceLineNo">367</span> }<a name="line.367"></a> -<span class="sourceLineNo">368</span><a name="line.368"></a> -<span class="sourceLineNo">369</span> private void onError(Throwable error) {<a name="line.369"></a> -<span class="sourceLineNo">370</span> error = translateException(error);<a name="line.370"></a> -<span class="sourceLineNo">371</span> if (tries > startLogErrorsCnt) {<a name="line.371"></a> -<span class="sourceLineNo">372</span> LOG.warn("Call to " + loc.getServerName() + " for scanner id = " + scannerId + " for " +<a name="line.372"></a> -<span class="sourceLineNo">373</span> loc.getRegionInfo().getEncodedName() + " of " + loc.getRegionInfo().getTable() +<a name="line.373"></a> -<span class="sourceLineNo">374</span> " failed, , tries = " + tries + ", maxAttempts = " + maxAttempts + ", timeout = " +<a name="line.374"></a> -<span class="sourceLineNo">375</span> TimeUnit.NANOSECONDS.toMillis(scanTimeoutNs) + " ms, time elapsed = " + elapsedMs() +<a name="line.375"></a> -<span class="sourceLineNo">376</span> " ms",<a name="line.376"></a> -<span class="sourceLineNo">377</span> error);<a name="line.377"></a> -<span class="sourceLineNo">378</span> }<a name="line.378"></a> -<span class="sourceLineNo">379</span> boolean scannerClosed = error instanceof UnknownScannerException ||<a name="line.379"></a> -<span class="sourceLineNo">380</span> error instanceof NotServingRegionException || error instanceof RegionServerStoppedException;<a name="line.380"></a> -<span class="sourceLineNo">381</span> RetriesExhaustedException.ThrowableWithExtraContext qt =<a name="line.381"></a> -<span class="sourceLineNo">382</span> new RetriesExhaustedException.ThrowableWithExtraContext(error,<a name="line.382"></a> -<span class="sourceLineNo">383</span> EnvironmentEdgeManager.currentTime(), "");<a name="line.383"></a> -<span class="sourceLineNo">384</span> exceptions.add(qt);<a name="line.384"></a> -<span class="sourceLineNo">385</span> if (tries >= maxAttempts) {<a name="line.385"></a> -<span class="sourceLineNo">386</span> completeExceptionally(!scannerClosed);<a name="line.386"></a> -<span class="sourceLineNo">387</span> return;<a name="line.387"></a> -<span class="sourceLineNo">388</span> }<a name="line.388"></a> -<span class="sourceLineNo">389</span> long delayNs;<a name="line.389"></a> -<span class="sourceLineNo">390</span> if (scanTimeoutNs > 0) {<a name="line.390"></a> -<span class="sourceLineNo">391</span> long maxDelayNs = remainingTimeNs() - SLEEP_DELTA_NS;<a name="line.391"></a> -<span class="sourceLineNo">392</span> if (maxDelayNs <= 0) {<a name="line.392"></a> -<span class="sourceLineNo">393</span> completeExceptionally(!scannerClosed);<a name="line.393"></a> -<span class="sourceLineNo">394</span> return;<a name="line.394"></a> -<span class="sourceLineNo">395</span> }<a name="line.395"></a> -<span class="sourceLineNo">396</span> delayNs = Math.min(maxDelayNs, getPauseTime(pauseNs, tries - 1));<a name="line.396"></a> -<span class="sourceLineNo">397</span> } else {<a name="line.397"></a> -<span class="sourceLineNo">398</span> delayNs = getPauseTime(pauseNs, tries - 1);<a name="line.398"></a> -<span class="sourceLineNo">399</span> }<a name="line.399"></a> -<span class="sourceLineNo">400</span> if (scannerClosed) {<a name="line.400"></a> -<span class="sourceLineNo">401</span> completeWhenError(false);<a name="line.401"></a> -<span class="sourceLineNo">402</span> return;<a name="line.402"></a> -<span class="sourceLineNo">403</span> }<a name="line.403"></a> -<span class="sourceLineNo">404</span> if (error instanceof OutOfOrderScannerNextException || error instanceof ScannerResetException) {<a name="line.404"></a> -<span class="sourceLineNo">405</span> completeWhenError(true);<a name="line.405"></a> -<span class="sourceLineNo">406</span> return;<a name="line.406"></a> -<span class="sourceLineNo">407</span> }<a name="line.407"></a> -<span class="sourceLineNo">408</span> if (error instanceof DoNotRetryIOException) {<a name="line.408"></a> -<span class="sourceLineNo">409</span> completeExceptionally(true);<a name="line.409"></a> -<span class="sourceLineNo">410</span> return;<a name="line.410"></a> -<span class="sourceLineNo">411</span> }<a name="line.411"></a> -<span class="sourceLineNo">412</span> tries++;<a name="line.412"></a> -<span class="sourceLineNo">413</span> retryTimer.newTimeout(t -> call(), delayNs, TimeUnit.NANOSECONDS);<a name="line.413"></a> -<span class="sourceLineNo">414</span> }<a name="line.414"></a> -<span class="sourceLineNo">415</span><a name="line.415"></a> -<span class="sourceLineNo">416</span> private void updateNextStartRowWhenError(Result result) {<a name="line.416"></a> -<span class="sourceLineNo">417</span> nextStartRowWhenError = result.getRow();<a name="line.417"></a> -<span class="sourceLineNo">418</span> includeNextStartRowWhenError = result.mayHaveMoreCellsInRow();<a name="line.418"></a> -<span class="sourceLineNo">419</span> }<a 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loc.getRegionInfo())) {<a name="line.430"></a> -<span class="sourceLineNo">431</span> completeNoMoreResults();<a name="line.431"></a> -<span class="sourceLineNo">432</span> } else {<a name="line.432"></a> -<span class="sourceLineNo">433</span> completeWithNextStartRow(loc.getRegionInfo().getStartKey(), false);<a name="line.433"></a> -<span class="sourceLineNo">434</span> }<a name="line.434"></a> -<span class="sourceLineNo">435</span> }<a name="line.435"></a> -<span class="sourceLineNo">436</span><a name="line.436"></a> -<span class="sourceLineNo">437</span> private void completeOrNext(ScanResponse resp, int numberOfCompleteRows) {<a name="line.437"></a> -<span class="sourceLineNo">438</span> if (resp.hasMoreResults() && !resp.getMoreResults()) {<a name="line.438"></a> -<span class="sourceLineNo">439</span> // RS tells us there is no more data for the whole scan<a name="line.439"></a> -<span class="sourceLineNo">440</span> completeNoMoreResults();<a name="line.440"></a> -<span 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SLEEP_DELTA_NS;<a name="line.405"></a> +<span class="sourceLineNo">406</span> if (maxDelayNs <= 0) {<a name="line.406"></a> +<span class="sourceLineNo">407</span> completeExceptionally(!scannerClosed);<a name="line.407"></a> +<span class="sourceLineNo">408</span> return;<a name="line.408"></a> +<span class="sourceLineNo">409</span> }<a name="line.409"></a> +<span class="sourceLineNo">410</span> delayNs = Math.min(maxDelayNs, getPauseTime(pauseNs, tries - 1));<a name="line.410"></a> +<span class="sourceLineNo">411</span> } else {<a name="line.411"></a> +<span class="sourceLineNo">412</span> delayNs = getPauseTime(pauseNs, tries - 1);<a name="line.412"></a> +<span class="sourceLineNo">413</span> }<a name="line.413"></a> +<span class="sourceLineNo">414</span> if (scannerClosed) {<a name="line.414"></a> +<span class="sourceLineNo">415</span> completeWhenError(false);<a name="line.415"></a> +<span class="sourceLineNo">416</span> return;<a name="line.416"></a> +<span class="sourceLineNo">417</span> }<a name="line.417"></a> +<span class="sourceLineNo">418</span> if (error instanceof OutOfOrderScannerNextException || error instanceof ScannerResetException) {<a name="line.418"></a> +<span class="sourceLineNo">419</span> completeWhenError(true);<a name="line.419"></a> +<span class="sourceLineNo">420</span> return;<a name="line.420"></a> +<span class="sourceLineNo">421</span> }<a name="line.421"></a> +<span class="sourceLineNo">422</span> if (error instanceof DoNotRetryIOException) {<a name="line.422"></a> +<span class="sourceLineNo">423</span> completeExceptionally(true);<a name="line.423"></a> +<span class="sourceLineNo">424</span> return;<a name="line.424"></a> +<span class="sourceLineNo">425</span> }<a name="line.425"></a> +<span class="sourceLineNo">426</span> tries++;<a name="line.426"></a> +<span class="sourceLineNo">427</span> retryTimer.newTimeout(t -> call(), delayNs, TimeUnit.NANOSECONDS);<a name="line.427"></a> +<span class="sourceLineNo">428</span> }<a name="line.428"></a> +<span class="sourceLineNo">429</span><a name="line.429"></a> +<span class="sourceLineNo">430</span> private void updateNextStartRowWhenError(Result result) {<a name="line.430"></a> +<span class="sourceLineNo">431</span> nextStartRowWhenError = result.getRow();<a name="line.431"></a> +<span class="sourceLineNo">432</span> includeNextStartRowWhenError = result.mayHaveMore
<TRUNCATED>
