You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2017/08/18 15:06:40 UTC
[13/30] hbase-site git commit: Published site at .
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cef8af03/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/RSRpcServices.RegionScannerShippedCallBack.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/RSRpcServices.RegionScannerShippedCallBack.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/RSRpcServices.RegionScannerShippedCallBack.html
index 7070913..244b038 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/RSRpcServices.RegionScannerShippedCallBack.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/RSRpcServices.RegionScannerShippedCallBack.html
@@ -123,3372 +123,3373 @@
<span class="sourceLineNo">115</span>import org.apache.hadoop.hbase.regionserver.wal.WALEdit;<a name="line.115"></a>
<span class="sourceLineNo">116</span>import org.apache.hadoop.hbase.security.Superusers;<a name="line.116"></a>
<span class="sourceLineNo">117</span>import org.apache.hadoop.hbase.security.User;<a name="line.117"></a>
-<span class="sourceLineNo">118</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.118"></a>
-<span class="sourceLineNo">119</span>import org.apache.hadoop.hbase.shaded.com.google.common.cache.Cache;<a name="line.119"></a>
-<span class="sourceLineNo">120</span>import org.apache.hadoop.hbase.shaded.com.google.common.cache.CacheBuilder;<a name="line.120"></a>
-<span class="sourceLineNo">121</span>import org.apache.hadoop.hbase.shaded.com.google.protobuf.ByteString;<a name="line.121"></a>
-<span class="sourceLineNo">122</span>import org.apache.hadoop.hbase.shaded.com.google.protobuf.Message;<a name="line.122"></a>
-<span class="sourceLineNo">123</span>import org.apache.hadoop.hbase.shaded.com.google.protobuf.RpcController;<a name="line.123"></a>
-<span class="sourceLineNo">124</span>import org.apache.hadoop.hbase.shaded.com.google.protobuf.ServiceException;<a name="line.124"></a>
-<span class="sourceLineNo">125</span>import org.apache.hadoop.hbase.shaded.com.google.protobuf.TextFormat;<a name="line.125"></a>
-<span class="sourceLineNo">126</span>import org.apache.hadoop.hbase.shaded.com.google.protobuf.UnsafeByteOperations;<a name="line.126"></a>
-<span class="sourceLineNo">127</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.127"></a>
-<span class="sourceLineNo">128</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.128"></a>
-<span class="sourceLineNo">129</span>import org.apache.hadoop.hbase.shaded.protobuf.ResponseConverter;<a name="line.129"></a>
-<span class="sourceLineNo">130</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.AdminService;<a name="line.130"></a>
-<span class="sourceLineNo">131</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.ClearCompactionQueuesRequest;<a name="line.131"></a>
-<span class="sourceLineNo">132</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.ClearCompactionQueuesResponse;<a name="line.132"></a>
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-<span class="sourceLineNo">134</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.CloseRegionResponse;<a name="line.134"></a>
-<span class="sourceLineNo">135</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.CompactRegionRequest;<a name="line.135"></a>
-<span class="sourceLineNo">136</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.CompactRegionResponse;<a name="line.136"></a>
-<span class="sourceLineNo">137</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.ExecuteProceduresRequest;<a name="line.137"></a>
-<span class="sourceLineNo">138</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.ExecuteProceduresResponse;<a name="line.138"></a>
-<span class="sourceLineNo">139</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.FlushRegionRequest;<a name="line.139"></a>
-<span class="sourceLineNo">140</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.FlushRegionResponse;<a name="line.140"></a>
-<span class="sourceLineNo">141</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetOnlineRegionRequest;<a name="line.141"></a>
-<span class="sourceLineNo">142</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetOnlineRegionResponse;<a name="line.142"></a>
-<span class="sourceLineNo">143</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoRequest;<a name="line.143"></a>
-<span class="sourceLineNo">144</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoResponse;<a name="line.144"></a>
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-<span class="sourceLineNo">146</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionLoadResponse;<a name="line.146"></a>
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-<span class="sourceLineNo">148</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetServerInfoResponse;<a name="line.148"></a>
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-<span class="sourceLineNo">150</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetStoreFileResponse;<a name="line.150"></a>
-<span class="sourceLineNo">151</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.OpenRegionRequest;<a name="line.151"></a>
-<span class="sourceLineNo">152</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.OpenRegionRequest.RegionOpenInfo;<a name="line.152"></a>
-<span class="sourceLineNo">153</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.OpenRegionResponse;<a name="line.153"></a>
-<span class="sourceLineNo">154</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.OpenRegionResponse.RegionOpeningState;<a name="line.154"></a>
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-<span class="sourceLineNo">156</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.ReplicateWALEntryResponse;<a name="line.156"></a>
-<span class="sourceLineNo">157</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.RollWALWriterRequest;<a name="line.157"></a>
-<span class="sourceLineNo">158</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.RollWALWriterResponse;<a name="line.158"></a>
-<span class="sourceLineNo">159</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.StopServerRequest;<a name="line.159"></a>
-<span class="sourceLineNo">160</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.StopServerResponse;<a name="line.160"></a>
-<span class="sourceLineNo">161</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.UpdateConfigurationRequest;<a name="line.161"></a>
-<span class="sourceLineNo">162</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.UpdateConfigurationResponse;<a name="line.162"></a>
-<span class="sourceLineNo">163</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.UpdateFavoredNodesRequest;<a name="line.163"></a>
-<span class="sourceLineNo">164</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.UpdateFavoredNodesResponse;<a name="line.164"></a>
-<span class="sourceLineNo">165</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.WALEntry;<a name="line.165"></a>
-<span class="sourceLineNo">166</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.WarmupRegionRequest;<a name="line.166"></a>
-<span class="sourceLineNo">167</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.WarmupRegionResponse;<a name="line.167"></a>
-<span class="sourceLineNo">168</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos;<a name="line.168"></a>
-<span class="sourceLineNo">169</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.Action;<a name="line.169"></a>
-<span class="sourceLineNo">170</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.BulkLoadHFileRequest;<a name="line.170"></a>
-<span class="sourceLineNo">171</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.BulkLoadHFileRequest.FamilyPath;<a name="line.171"></a>
-<span class="sourceLineNo">172</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.BulkLoadHFileResponse;<a name="line.172"></a>
-<span class="sourceLineNo">173</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CleanupBulkLoadRequest;<a name="line.173"></a>
-<span class="sourceLineNo">174</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CleanupBulkLoadResponse;<a name="line.174"></a>
-<span class="sourceLineNo">175</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ClientService;<a name="line.175"></a>
-<span class="sourceLineNo">176</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.Condition;<a name="line.176"></a>
-<span class="sourceLineNo">177</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceRequest;<a name="line.177"></a>
-<span class="sourceLineNo">178</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.CoprocessorServiceResponse;<a name="line.178"></a>
-<span class="sourceLineNo">179</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.GetRequest;<a name="line.179"></a>
-<span class="sourceLineNo">180</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.GetResponse;<a name="line.180"></a>
-<span class="sourceLineNo">181</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MultiRegionLoadStats;<a name="line.181"></a>
-<span class="sourceLineNo">182</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MultiRequest;<a name="line.182"></a>
-<span class="sourceLineNo">183</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MultiResponse;<a name="line.183"></a>
-<span class="sourceLineNo">184</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MutateRequest;<a name="line.184"></a>
-<span class="sourceLineNo">185</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MutateResponse;<a name="line.185"></a>
-<span class="sourceLineNo">186</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MutationProto;<a name="line.186"></a>
-<span class="sourceLineNo">187</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.MutationProto.MutationType;<a name="line.187"></a>
-<span class="sourceLineNo">188</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.PrepareBulkLoadRequest;<a name="line.188"></a>
-<span class="sourceLineNo">189</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.PrepareBulkLoadResponse;<a name="line.189"></a>
-<span class="sourceLineNo">190</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.RegionAction;<a name="line.190"></a>
-<span class="sourceLineNo">191</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.RegionActionResult;<a name="line.191"></a>
-<span class="sourceLineNo">192</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ResultOrException;<a name="line.192"></a>
-<span class="sourceLineNo">193</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanRequest;<a name="line.193"></a>
-<span class="sourceLineNo">194</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos.ScanResponse;<a name="line.194"></a>
-<span class="sourceLineNo">195</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClusterStatusProtos;<a name="line.195"></a>
-<span class="sourceLineNo">196</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ClusterStatusProtos.RegionLoad;<a name="line.196"></a>
-<span class="sourceLineNo">197</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.NameBytesPair;<a name="line.197"></a>
-<span class="sourceLineNo">198</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.NameInt64Pair;<a name="line.198"></a>
-<span class="sourceLineNo">199</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.RegionInfo;<a name="line.199"></a>
-<span class="sourceLineNo">200</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.RegionSpecifier;<a name="line.200"></a>
-<span class="sourceLineNo">201</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.RegionSpecifier.RegionSpecifierType;<a name="line.201"></a>
-<span class="sourceLineNo">202</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.MapReduceProtos.ScanMetrics;<a name="line.202"></a>
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-<span class="sourceLineNo">205</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.QuotaProtos.GetSpaceQuotaSnapshotsResponse.TableQuotaSnapshot;<a name="line.205"></a>
-<span class="sourceLineNo">206</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader;<a name="line.206"></a>
-<span class="sourceLineNo">207</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.BulkLoadDescriptor;<a name="line.207"></a>
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-<span class="sourceLineNo">210</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.WALProtos.RegionEventDescriptor;<a name="line.210"></a>
-<span class="sourceLineNo">211</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.211"></a>
-<span class="sourceLineNo">212</span>import org.apache.hadoop.hbase.util.DNS;<a name="line.212"></a>
-<span class="sourceLineNo">213</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.213"></a>
-<span class="sourceLineNo">214</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.214"></a>
-<span class="sourceLineNo">215</span>import org.apache.hadoop.hbase.util.ServerRegionReplicaUtil;<a name="line.215"></a>
-<span class="sourceLineNo">216</span>import org.apache.hadoop.hbase.util.Strings;<a name="line.216"></a>
-<span class="sourceLineNo">217</span>import org.apache.hadoop.hbase.wal.WAL;<a name="line.217"></a>
-<span class="sourceLineNo">218</span>import org.apache.hadoop.hbase.wal.WALKey;<a name="line.218"></a>
-<span class="sourceLineNo">219</span>import org.apache.hadoop.hbase.wal.WALSplitter;<a name="line.219"></a>
-<span class="sourceLineNo">220</span>import org.apache.hadoop.hbase.zookeeper.ZKSplitLog;<a name="line.220"></a>
-<span class="sourceLineNo">221</span>import org.apache.zookeeper.KeeperException;<a name="line.221"></a>
-<span class="sourceLineNo">222</span><a name="line.222"></a>
-<span class="sourceLineNo">223</span>/**<a name="line.223"></a>
-<span class="sourceLineNo">224</span> * Implements the regionserver RPC services.<a name="line.224"></a>
-<span class="sourceLineNo">225</span> */<a name="line.225"></a>
-<span class="sourceLineNo">226</span>@InterfaceAudience.Private<a name="line.226"></a>
-<span class="sourceLineNo">227</span>@SuppressWarnings("deprecation")<a name="line.227"></a>
-<span class="sourceLineNo">228</span>public class RSRpcServices implements HBaseRPCErrorHandler,<a name="line.228"></a>
-<span class="sourceLineNo">229</span> AdminService.BlockingInterface, ClientService.BlockingInterface, PriorityFunction,<a name="line.229"></a>
-<span class="sourceLineNo">230</span> ConfigurationObserver {<a name="line.230"></a>
-<span class="sourceLineNo">231</span> protected static final Log LOG = LogFactory.getLog(RSRpcServices.class);<a name="line.231"></a>
-<span class="sourceLineNo">232</span><a name="line.232"></a>
-<span class="sourceLineNo">233</span> /** RPC scheduler to use for the region server. */<a name="line.233"></a>
-<span class="sourceLineNo">234</span> public static final String REGION_SERVER_RPC_SCHEDULER_FACTORY_CLASS =<a name="line.234"></a>
-<span class="sourceLineNo">235</span> "hbase.region.server.rpc.scheduler.factory.class";<a name="line.235"></a>
-<span class="sourceLineNo">236</span><a name="line.236"></a>
-<span class="sourceLineNo">237</span> /**<a name="line.237"></a>
-<span class="sourceLineNo">238</span> * Minimum allowable time limit delta (in milliseconds) that can be enforced during scans. This<a name="line.238"></a>
-<span class="sourceLineNo">239</span> * configuration exists to prevent the scenario where a time limit is specified to be so<a name="line.239"></a>
-<span class="sourceLineNo">240</span> * restrictive that the time limit is reached immediately (before any cells are scanned).<a name="line.240"></a>
-<span class="sourceLineNo">241</span> */<a name="line.241"></a>
-<span class="sourceLineNo">242</span> private static final String REGION_SERVER_RPC_MINIMUM_SCAN_TIME_LIMIT_DELTA =<a name="line.242"></a>
-<span class="sourceLineNo">243</span> "hbase.region.server.rpc.minimum.scan.time.limit.delta";<a name="line.243"></a>
-<span class="sourceLineNo">244</span> /**<a name="line.244"></a>
-<span class="sourceLineNo">245</span> * Default value of {@link RSRpcServices#REGION_SERVER_RPC_MINIMUM_SCAN_TIME_LIMIT_DELTA}<a name="line.245"></a>
-<span class="sourceLineNo">246</span> */<a name="line.246"></a>
-<span class="sourceLineNo">247</span> private static final long DEFAULT_REGION_SERVER_RPC_MINIMUM_SCAN_TIME_LIMIT_DELTA = 10;<a name="line.247"></a>
-<span class="sourceLineNo">248</span><a name="line.248"></a>
-<span class="sourceLineNo">249</span> /**<a name="line.249"></a>
-<span class="sourceLineNo">250</span> * Number of rows in a batch operation above which a warning will be logged.<a name="line.250"></a>
-<span class="sourceLineNo">251</span> */<a name="line.251"></a>
-<span class="sourceLineNo">252</span> static final String BATCH_ROWS_THRESHOLD_NAME = "hbase.rpc.rows.warning.threshold";<a name="line.252"></a>
-<span class="sourceLineNo">253</span> /**<a name="line.253"></a>
-<span class="sourceLineNo">254</span> * Default value of {@link RSRpcServices#BATCH_ROWS_THRESHOLD_NAME}<a name="line.254"></a>
-<span class="sourceLineNo">255</span> */<a name="line.255"></a>
-<span class="sourceLineNo">256</span> static final int BATCH_ROWS_THRESHOLD_DEFAULT = 5000;<a name="line.256"></a>
-<span class="sourceLineNo">257</span><a name="line.257"></a>
-<span class="sourceLineNo">258</span> // Request counter. (Includes requests that are not serviced by regions.)<a name="line.258"></a>
-<span class="sourceLineNo">259</span> // Count only once for requests with multiple actions like multi/caching-scan/replayBatch<a name="line.259"></a>
-<span class="sourceLineNo">260</span> final LongAdder requestCount = new LongAdder();<a name="line.260"></a>
-<span class="sourceLineNo">261</span><a name="line.261"></a>
-<span class="sourceLineNo">262</span> // Request counter. (Excludes requests that are not serviced by regions.)<a name="line.262"></a>
-<span class="sourceLineNo">263</span> // Count rows for requests with multiple actions like multi/caching-scan/replayBatch<a name="line.263"></a>
-<span class="sourceLineNo">264</span> final LongAdder requestRowActionCount = new LongAdder();<a name="line.264"></a>
-<span class="sourceLineNo">265</span><a name="line.265"></a>
-<span class="sourceLineNo">266</span> // Request counter for rpc get<a name="line.266"></a>
-<span class="sourceLineNo">267</span> final LongAdder rpcGetRequestCount = new LongAdder();<a name="line.267"></a>
-<span class="sourceLineNo">268</span><a name="line.268"></a>
-<span class="sourceLineNo">269</span> // Request counter for rpc scan<a name="line.269"></a>
-<span class="sourceLineNo">270</span> final LongAdder rpcScanRequestCount = new LongAdder();<a name="line.270"></a>
-<span class="sourceLineNo">271</span><a name="line.271"></a>
-<span class="sourceLineNo">272</span> // Request counter for rpc multi<a name="line.272"></a>
-<span class="sourceLineNo">273</span> final LongAdder rpcMultiRequestCount = new LongAdder();<a name="line.273"></a>
-<span class="sourceLineNo">274</span><a name="line.274"></a>
-<span class="sourceLineNo">275</span> // Request counter for rpc mutate<a name="line.275"></a>
-<span class="sourceLineNo">276</span> final LongAdder rpcMutateRequestCount = new LongAdder();<a name="line.276"></a>
-<span class="sourceLineNo">277</span><a name="line.277"></a>
-<span class="sourceLineNo">278</span> // Server to handle client requests.<a name="line.278"></a>
-<span class="sourceLineNo">279</span> final RpcServerInterface rpcServer;<a name="line.279"></a>
-<span class="sourceLineNo">280</span> final InetSocketAddress isa;<a name="line.280"></a>
-<span class="sourceLineNo">281</span><a name="line.281"></a>
-<span class="sourceLineNo">282</span> private final HRegionServer regionServer;<a name="line.282"></a>
-<span class="sourceLineNo">283</span> private final long maxScannerResultSize;<a name="line.283"></a>
-<span class="sourceLineNo">284</span><a name="line.284"></a>
-<span class="sourceLineNo">285</span> // The reference to the priority extraction function<a name="line.285"></a>
-<span class="sourceLineNo">286</span> private final PriorityFunction priority;<a name="line.286"></a>
-<span class="sourceLineNo">287</span><a name="line.287"></a>
-<span class="sourceLineNo">288</span> private ScannerIdGenerator scannerIdGenerator;<a name="line.288"></a>
-<span class="sourceLineNo">289</span> private final ConcurrentMap<String, RegionScannerHolder> scanners = new ConcurrentHashMap<>();<a name="line.289"></a>
-<span class="sourceLineNo">290</span> // Hold the name of a closed scanner for a while. This is used to keep compatible for old clients<a name="line.290"></a>
-<span class="sourceLineNo">291</span> // which may send next or close request to a region scanner which has already been exhausted. The<a name="line.291"></a>
-<span class="sourceLineNo">292</span> // entries will be removed automatically after scannerLeaseTimeoutPeriod.<a name="line.292"></a>
-<span class="sourceLineNo">293</span> private final Cache<String, String> closedScanners;<a name="line.293"></a>
-<span class="sourceLineNo">294</span> /**<a name="line.294"></a>
-<span class="sourceLineNo">295</span> * The lease timeout period for client scanners (milliseconds).<a name="line.295"></a>
-<span class="sourceLineNo">296</span> */<a name="line.296"></a>
-<span class="sourceLineNo">297</span> private final int scannerLeaseTimeoutPeriod;<a name="line.297"></a>
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