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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/01/30 15:18:32 UTC
[24/44] hbase-site git commit: Published site at .
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a3fb6d74/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushRegionEntry.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushRegionEntry.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushRegionEntry.html
index f66a649..d7d8aea 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushRegionEntry.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.FlushRegionEntry.html
@@ -34,817 +34,806 @@
<span class="sourceLineNo">026</span>import java.util.HashSet;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.List;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.Map;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import java.util.Objects;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import java.util.Set;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import java.util.SortedMap;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import java.util.concurrent.BlockingQueue;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import java.util.concurrent.DelayQueue;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import java.util.concurrent.Delayed;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import java.util.concurrent.ThreadFactory;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import java.util.concurrent.TimeUnit;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import java.util.concurrent.atomic.AtomicBoolean;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import java.util.concurrent.atomic.LongAdder;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.39"></a>
-<span class="sourceLineNo">040</span><a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.conf.Configuration;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.DroppedSnapshotException;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.HConstants;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.client.RegionReplicaUtil;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.regionserver.HRegion.FlushResult;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.trace.TraceUtil;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.util.ServerRegionReplicaUtil;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.util.Threads;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.ipc.RemoteException;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.util.StringUtils.TraditionalBinaryPrefix;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.htrace.core.TraceScope;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.slf4j.Logger;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.slf4j.LoggerFactory;<a name="line.58"></a>
-<span class="sourceLineNo">059</span><a name="line.59"></a>
-<span class="sourceLineNo">060</span>/**<a name="line.60"></a>
-<span class="sourceLineNo">061</span> * Thread that flushes cache on request<a name="line.61"></a>
-<span class="sourceLineNo">062</span> *<a name="line.62"></a>
-<span class="sourceLineNo">063</span> * NOTE: This class extends Thread rather than Chore because the sleep time<a name="line.63"></a>
-<span class="sourceLineNo">064</span> * can be interrupted when there is something to do, rather than the Chore<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * sleep time which is invariant.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> *<a name="line.66"></a>
-<span class="sourceLineNo">067</span> * @see FlushRequester<a name="line.67"></a>
-<span class="sourceLineNo">068</span> */<a name="line.68"></a>
-<span class="sourceLineNo">069</span>@InterfaceAudience.Private<a name="line.69"></a>
-<span class="sourceLineNo">070</span>class MemStoreFlusher implements FlushRequester {<a name="line.70"></a>
-<span class="sourceLineNo">071</span> private static final Logger LOG = LoggerFactory.getLogger(MemStoreFlusher.class);<a name="line.71"></a>
-<span class="sourceLineNo">072</span><a name="line.72"></a>
-<span class="sourceLineNo">073</span> private Configuration conf;<a name="line.73"></a>
-<span class="sourceLineNo">074</span> // These two data members go together. Any entry in the one must have<a name="line.74"></a>
-<span class="sourceLineNo">075</span> // a corresponding entry in the other.<a name="line.75"></a>
-<span class="sourceLineNo">076</span> private final BlockingQueue<FlushQueueEntry> flushQueue = new DelayQueue<>();<a name="line.76"></a>
-<span class="sourceLineNo">077</span> private final Map<Region, FlushRegionEntry> regionsInQueue = new HashMap<>();<a name="line.77"></a>
-<span class="sourceLineNo">078</span> private AtomicBoolean wakeupPending = new AtomicBoolean();<a name="line.78"></a>
-<span class="sourceLineNo">079</span><a name="line.79"></a>
-<span class="sourceLineNo">080</span> private final long threadWakeFrequency;<a name="line.80"></a>
-<span class="sourceLineNo">081</span> private final HRegionServer server;<a name="line.81"></a>
-<span class="sourceLineNo">082</span> private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();<a name="line.82"></a>
-<span class="sourceLineNo">083</span> private final Object blockSignal = new Object();<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span> private long blockingWaitTime;<a name="line.85"></a>
-<span class="sourceLineNo">086</span> private final LongAdder updatesBlockedMsHighWater = new LongAdder();<a name="line.86"></a>
-<span class="sourceLineNo">087</span><a name="line.87"></a>
-<span class="sourceLineNo">088</span> private final FlushHandler[] flushHandlers;<a name="line.88"></a>
-<span class="sourceLineNo">089</span> private List<FlushRequestListener> flushRequestListeners = new ArrayList<>(1);<a name="line.89"></a>
-<span class="sourceLineNo">090</span><a name="line.90"></a>
-<span class="sourceLineNo">091</span> /**<a name="line.91"></a>
-<span class="sourceLineNo">092</span> * @param conf<a name="line.92"></a>
-<span class="sourceLineNo">093</span> * @param server<a name="line.93"></a>
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-<span class="sourceLineNo">095</span> public MemStoreFlusher(final Configuration conf,<a name="line.95"></a>
-<span class="sourceLineNo">096</span> final HRegionServer server) {<a name="line.96"></a>
-<span class="sourceLineNo">097</span> super();<a name="line.97"></a>
-<span class="sourceLineNo">098</span> this.conf = conf;<a name="line.98"></a>
-<span class="sourceLineNo">099</span> this.server = server;<a name="line.99"></a>
-<span class="sourceLineNo">100</span> this.threadWakeFrequency =<a name="line.100"></a>
-<span class="sourceLineNo">101</span> conf.getLong(HConstants.THREAD_WAKE_FREQUENCY, 10 * 1000);<a name="line.101"></a>
-<span class="sourceLineNo">102</span> this.blockingWaitTime = conf.getInt("hbase.hstore.blockingWaitTime",<a name="line.102"></a>
-<span class="sourceLineNo">103</span> 90000);<a name="line.103"></a>
-<span class="sourceLineNo">104</span> int handlerCount = conf.getInt("hbase.hstore.flusher.count", 2);<a name="line.104"></a>
-<span class="sourceLineNo">105</span> this.flushHandlers = new FlushHandler[handlerCount];<a name="line.105"></a>
-<span class="sourceLineNo">106</span> LOG.info("globalMemStoreLimit="<a name="line.106"></a>
-<span class="sourceLineNo">107</span> + TraditionalBinaryPrefix<a name="line.107"></a>
-<span class="sourceLineNo">108</span> .long2String(this.server.getRegionServerAccounting().getGlobalMemStoreLimit(), "", 1)<a name="line.108"></a>
-<span class="sourceLineNo">109</span> + ", globalMemStoreLimitLowMark="<a name="line.109"></a>
-<span class="sourceLineNo">110</span> + TraditionalBinaryPrefix.long2String(<a name="line.110"></a>
-<span class="sourceLineNo">111</span> this.server.getRegionServerAccounting().getGlobalMemStoreLimitLowMark(), "", 1)<a name="line.111"></a>
-<span class="sourceLineNo">112</span> + ", Offheap="<a name="line.112"></a>
-<span class="sourceLineNo">113</span> + (this.server.getRegionServerAccounting().isOffheap()));<a name="line.113"></a>
-<span class="sourceLineNo">114</span> }<a name="line.114"></a>
-<span class="sourceLineNo">115</span><a name="line.115"></a>
-<span class="sourceLineNo">116</span> public LongAdder getUpdatesBlockedMsHighWater() {<a name="line.116"></a>
-<span class="sourceLineNo">117</span> return this.updatesBlockedMsHighWater;<a name="line.117"></a>
-<span class="sourceLineNo">118</span> }<a name="line.118"></a>
-<span class="sourceLineNo">119</span><a name="line.119"></a>
-<span class="sourceLineNo">120</span> /**<a name="line.120"></a>
-<span class="sourceLineNo">121</span> * The memstore across all regions has exceeded the low water mark. Pick<a name="line.121"></a>
-<span class="sourceLineNo">122</span> * one region to flush and flush it synchronously (this is called from the<a name="line.122"></a>
-<span class="sourceLineNo">123</span> * flush thread)<a name="line.123"></a>
-<span class="sourceLineNo">124</span> * @return true if successful<a name="line.124"></a>
-<span class="sourceLineNo">125</span> */<a name="line.125"></a>
-<span class="sourceLineNo">126</span> private boolean flushOneForGlobalPressure() {<a name="line.126"></a>
-<span class="sourceLineNo">127</span> SortedMap<Long, HRegion> regionsBySize = server.getCopyOfOnlineRegionsSortedBySize();<a name="line.127"></a>
-<span class="sourceLineNo">128</span> Set<HRegion> excludedRegions = new HashSet<>();<a name="line.128"></a>
-<span class="sourceLineNo">129</span><a name="line.129"></a>
-<span class="sourceLineNo">130</span> double secondaryMultiplier<a name="line.130"></a>
-<span class="sourceLineNo">131</span> = ServerRegionReplicaUtil.getRegionReplicaStoreFileRefreshMultiplier(conf);<a name="line.131"></a>
-<span class="sourceLineNo">132</span><a name="line.132"></a>
-<span class="sourceLineNo">133</span> boolean flushedOne = false;<a name="line.133"></a>
-<span class="sourceLineNo">134</span> while (!flushedOne) {<a name="line.134"></a>
-<span class="sourceLineNo">135</span> // Find the biggest region that doesn't have too many storefiles<a name="line.135"></a>
-<span class="sourceLineNo">136</span> // (might be null!)<a name="line.136"></a>
-<span class="sourceLineNo">137</span> HRegion bestFlushableRegion = getBiggestMemStoreRegion(regionsBySize, excludedRegions, true);<a name="line.137"></a>
-<span class="sourceLineNo">138</span> // Find the biggest region, total, even if it might have too many flushes.<a name="line.138"></a>
-<span class="sourceLineNo">139</span> HRegion bestAnyRegion = getBiggestMemStoreRegion(<a name="line.139"></a>
-<span class="sourceLineNo">140</span> regionsBySize, excludedRegions, false);<a name="line.140"></a>
-<span class="sourceLineNo">141</span> // Find the biggest region that is a secondary region<a name="line.141"></a>
-<span class="sourceLineNo">142</span> HRegion bestRegionReplica = getBiggestMemStoreOfRegionReplica(regionsBySize,<a name="line.142"></a>
-<span class="sourceLineNo">143</span> excludedRegions);<a name="line.143"></a>
-<span class="sourceLineNo">144</span><a name="line.144"></a>
-<span class="sourceLineNo">145</span> if (bestAnyRegion == null && bestRegionReplica == null) {<a name="line.145"></a>
-<span class="sourceLineNo">146</span> LOG.error("Above memory mark but there are no flushable regions!");<a name="line.146"></a>
-<span class="sourceLineNo">147</span> return false;<a name="line.147"></a>
-<span class="sourceLineNo">148</span> }<a name="line.148"></a>
-<span class="sourceLineNo">149</span><a name="line.149"></a>
-<span class="sourceLineNo">150</span> HRegion regionToFlush;<a name="line.150"></a>
-<span class="sourceLineNo">151</span> if (bestFlushableRegion != null &&<a name="line.151"></a>
-<span class="sourceLineNo">152</span> bestAnyRegion.getMemStoreSize() > 2 * bestFlushableRegion.getMemStoreSize()) {<a name="line.152"></a>
-<span class="sourceLineNo">153</span> // Even if it's not supposed to be flushed, pick a region if it's more than twice<a name="line.153"></a>
-<span class="sourceLineNo">154</span> // as big as the best flushable one - otherwise when we're under pressure we make<a name="line.154"></a>
-<span class="sourceLineNo">155</span> // lots of little flushes and cause lots of compactions, etc, which just makes<a name="line.155"></a>
-<span class="sourceLineNo">156</span> // life worse!<a name="line.156"></a>
-<span class="sourceLineNo">157</span> if (LOG.isDebugEnabled()) {<a name="line.157"></a>
-<span class="sourceLineNo">158</span> LOG.debug("Under global heap pressure: " + "Region "<a name="line.158"></a>
-<span class="sourceLineNo">159</span> + bestAnyRegion.getRegionInfo().getRegionNameAsString()<a name="line.159"></a>
-<span class="sourceLineNo">160</span> + " has too many " + "store files, but is "<a name="line.160"></a>
-<span class="sourceLineNo">161</span> + TraditionalBinaryPrefix.long2String(bestAnyRegion.getMemStoreSize(), "", 1)<a name="line.161"></a>
-<span class="sourceLineNo">162</span> + " vs best flushable region's "<a name="line.162"></a>
-<span class="sourceLineNo">163</span> + TraditionalBinaryPrefix.long2String(bestFlushableRegion.getMemStoreSize(), "", 1)<a name="line.163"></a>
-<span class="sourceLineNo">164</span> + ". Choosing the bigger.");<a name="line.164"></a>
-<span class="sourceLineNo">165</span> }<a name="line.165"></a>
-<span class="sourceLineNo">166</span> regionToFlush = bestAnyRegion;<a name="line.166"></a>
-<span class="sourceLineNo">167</span> } else {<a name="line.167"></a>
-<span class="sourceLineNo">168</span> if (bestFlushableRegion == null) {<a name="line.168"></a>
-<span class="sourceLineNo">169</span> regionToFlush = bestAnyRegion;<a name="line.169"></a>
-<span class="sourceLineNo">170</span> } else {<a name="line.170"></a>
-<span class="sourceLineNo">171</span> regionToFlush = bestFlushableRegion;<a name="line.171"></a>
-<span class="sourceLineNo">172</span> }<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> Preconditions.checkState(<a name="line.175"></a>
-<span class="sourceLineNo">176</span> (regionToFlush != null && regionToFlush.getMemStoreSize() > 0) ||<a name="line.176"></a>
-<span class="sourceLineNo">177</span> (bestRegionReplica != null && bestRegionReplica.getMemStoreSize() > 0));<a name="line.177"></a>
-<span class="sourceLineNo">178</span><a name="line.178"></a>
-<span class="sourceLineNo">179</span> if (regionToFlush == null ||<a name="line.179"></a>
-<span class="sourceLineNo">180</span> (bestRegionReplica != null &&<a name="line.180"></a>
-<span class="sourceLineNo">181</span> ServerRegionReplicaUtil.isRegionReplicaStoreFileRefreshEnabled(conf) &&<a name="line.181"></a>
-<span class="sourceLineNo">182</span> (bestRegionReplica.getMemStoreSize()<a name="line.182"></a>
-<span class="sourceLineNo">183</span> > secondaryMultiplier * regionToFlush.getMemStoreSize()))) {<a name="line.183"></a>
-<span class="sourceLineNo">184</span> LOG.info("Refreshing storefiles of region " + bestRegionReplica +<a name="line.184"></a>
-<span class="sourceLineNo">185</span> " due to global heap pressure. Total memstore datasize=" +<a name="line.185"></a>
-<span class="sourceLineNo">186</span> TraditionalBinaryPrefix.long2String(<a name="line.186"></a>
-<span class="sourceLineNo">187</span> server.getRegionServerAccounting().getGlobalMemStoreDataSize(), "", 1) +<a name="line.187"></a>
-<span class="sourceLineNo">188</span> " memstore heap size=" + TraditionalBinaryPrefix.long2String(<a name="line.188"></a>
-<span class="sourceLineNo">189</span> server.getRegionServerAccounting().getGlobalMemStoreHeapSize(), "", 1));<a name="line.189"></a>
-<span class="sourceLineNo">190</span> flushedOne = refreshStoreFilesAndReclaimMemory(bestRegionReplica);<a name="line.190"></a>
-<span class="sourceLineNo">191</span> if (!flushedOne) {<a name="line.191"></a>
-<span class="sourceLineNo">192</span> LOG.info("Excluding secondary region " + bestRegionReplica +<a name="line.192"></a>
-<span class="sourceLineNo">193</span> " - trying to find a different region to refresh files.");<a name="line.193"></a>
-<span class="sourceLineNo">194</span> excludedRegions.add(bestRegionReplica);<a name="line.194"></a>
-<span class="sourceLineNo">195</span> }<a name="line.195"></a>
-<span class="sourceLineNo">196</span> } else {<a name="line.196"></a>
-<span class="sourceLineNo">197</span> LOG.info("Flush of region " + regionToFlush + " due to global heap pressure. " +<a name="line.197"></a>
-<span class="sourceLineNo">198</span> "Total Memstore size=" +<a name="line.198"></a>
-<span class="sourceLineNo">199</span> TraditionalBinaryPrefix.long2String(<a name="line.199"></a>
-<span class="sourceLineNo">200</span> server.getRegionServerAccounting().getGlobalMemStoreDataSize(), "", 1) +<a name="line.200"></a>
-<span class="sourceLineNo">201</span> ", Region memstore size=" +<a name="line.201"></a>
-<span class="sourceLineNo">202</span> TraditionalBinaryPrefix.long2String(regionToFlush.getMemStoreSize(), "", 1));<a name="line.202"></a>
-<span class="sourceLineNo">203</span> flushedOne = flushRegion(regionToFlush, true, false, FlushLifeCycleTracker.DUMMY);<a name="line.203"></a>
-<span class="sourceLineNo">204</span><a name="line.204"></a>
-<span class="sourceLineNo">205</span> if (!flushedOne) {<a name="line.205"></a>
-<span class="sourceLineNo">206</span> LOG.info("Excluding unflushable region " + regionToFlush +<a name="line.206"></a>
-<span class="sourceLineNo">207</span> " - trying to find a different region to flush.");<a name="line.207"></a>
-<span class="sourceLineNo">208</span> excludedRegions.add(regionToFlush);<a name="line.208"></a>
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-<span class="sourceLineNo">224</span> FlushQueueEntry fqe = null;<a name="line.224"></a>
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-<span class="sourceLineNo">229</span> FlushType type = isAboveLowWaterMark();<a name="line.229"></a>
-<span class="sourceLineNo">230</span> if (type != FlushType.NORMAL) {<a name="line.230"></a>
-<span class="sourceLineNo">231</span> LOG.debug("Flush thread woke up because memory above low water="<a name="line.231"></a>
-<span class="sourceLineNo">232</span> + TraditionalBinaryPrefix.long2String(<a name="line.232"></a>
-<span class="sourceLineNo">233</span> server.getRegionServerAccounting().getGlobalMemStoreLimitLowMark(), "", 1));<a name="line.233"></a>
-<span class="sourceLineNo">234</span> // For offheap memstore, even if the lower water mark was breached due to heap overhead<a name="line.234"></a>
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-<span class="sourceLineNo">238</span> if (!flushOneForGlobalPressure()) {<a name="line.238"></a>
-<span class="sourceLineNo">239</span> // Wasn't able to flush any region, but we're above low water mark<a name="line.239"></a>
-<span class="sourceLineNo">240</span> // This is unlikely to happen, but might happen when closing the<a name="line.240"></a>
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-<span class="sourceLineNo">244</span> Thread.sleep(1000);<a name="line.244"></a>
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-<span class="sourceLineNo">251</span> }<a name="line.251"></a>
-<span class="sourceLineNo">252</span> FlushRegionEntry fre = (FlushRegionEntry) fqe;<a name="line.252"></a>
-<span class="sourceLineNo">253</span> if (!flushRegion(fre)) {<a name="line.253"></a>
-<span class="sourceLineNo">254</span> break;<a name="line.254"></a>
-<span class="sourceLineNo">255</span> }<a name="line.255"></a>
-<span class="sourceLineNo">256</span> } catch (InterruptedException ex) {<a name="line.256"></a>
-<span class="sourceLineNo">257</span> continue;<a name="line.257"></a>
-<span class="sourceLineNo">258</span> } catch (ConcurrentModificationException ex) {<a name="line.258"></a>
-<span class="sourceLineNo">259</span> continue;<a name="line.259"></a>
-<span class="sourceLineNo">260</span> } catch (Exception ex) {<a name="line.260"></a>
-<span class="sourceLineNo">261</span> LOG.error("Cache flusher failed for entry " + fqe, ex);<a name="line.261"></a>
-<span class="sourceLineNo">262</span> if (!server.checkFileSystem()) {<a name="line.262"></a>
-<span class="sourceLineNo">263</span> break;<a name="line.263"></a>
-<span class="sourceLineNo">264</span> }<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> synchronized (regionsInQueue) {<a name="line.267"></a>
-<span class="sourceLineNo">268</span> regionsInQueue.clear();<a name="line.268"></a>
-<span class="sourceLineNo">269</span> flushQueue.clear();<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> // Signal anyone waiting, so they see the close flag<a name="line.272"></a>
-<span class="sourceLineNo">273</span> wakeUpIfBlocking();<a name="line.273"></a>
-<span class="sourceLineNo">274</span> LOG.info(getName() + " exiting");<a name="line.274"></a>
-<span class="sourceLineNo">275</span> }<a name="line.275"></a>
-<span class="sourceLineNo">276</span> }<a name="line.276"></a>
+<span class="sourceLineNo">029</span>import java.util.Set;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import java.util.SortedMap;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import java.util.concurrent.BlockingQueue;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import java.util.concurrent.DelayQueue;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.util.concurrent.Delayed;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.concurrent.ThreadFactory;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import java.util.concurrent.TimeUnit;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import java.util.concurrent.atomic.AtomicBoolean;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import java.util.concurrent.atomic.LongAdder;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.38"></a>
+<span class="sourceLineNo">039</span><a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.conf.Configuration;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.DroppedSnapshotException;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.HConstants;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.client.RegionReplicaUtil;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.regionserver.HRegion.FlushResult;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.trace.TraceUtil;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.HasThread;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.hadoop.hbase.util.ServerRegionReplicaUtil;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.util.Threads;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.ipc.RemoteException;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.util.StringUtils.TraditionalBinaryPrefix;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.htrace.core.TraceScope;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.slf4j.Logger;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.slf4j.LoggerFactory;<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span>/**<a name="line.59"></a>
+<span class="sourceLineNo">060</span> * Thread that flushes cache on request<a name="line.60"></a>
+<span class="sourceLineNo">061</span> *<a name="line.61"></a>
+<span class="sourceLineNo">062</span> * NOTE: This class extends Thread rather than Chore because the sleep time<a name="line.62"></a>
+<span class="sourceLineNo">063</span> * can be interrupted when there is something to do, rather than the Chore<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * sleep time which is invariant.<a name="line.64"></a>
+<span class="sourceLineNo">065</span> *<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * @see FlushRequester<a name="line.66"></a>
+<span class="sourceLineNo">067</span> */<a name="line.67"></a>
+<span class="sourceLineNo">068</span>@InterfaceAudience.Private<a name="line.68"></a>
+<span class="sourceLineNo">069</span>class MemStoreFlusher implements FlushRequester {<a name="line.69"></a>
+<span class="sourceLineNo">070</span> private static final Logger LOG = LoggerFactory.getLogger(MemStoreFlusher.class);<a name="line.70"></a>
+<span class="sourceLineNo">071</span><a name="line.71"></a>
+<span class="sourceLineNo">072</span> private Configuration conf;<a name="line.72"></a>
+<span class="sourceLineNo">073</span> // These two data members go together. Any entry in the one must have<a name="line.73"></a>
+<span class="sourceLineNo">074</span> // a corresponding entry in the other.<a name="line.74"></a>
+<span class="sourceLineNo">075</span> private final BlockingQueue<FlushQueueEntry> flushQueue = new DelayQueue<>();<a name="line.75"></a>
+<span class="sourceLineNo">076</span> private final Map<Region, FlushRegionEntry> regionsInQueue = new HashMap<>();<a name="line.76"></a>
+<span class="sourceLineNo">077</span> private AtomicBoolean wakeupPending = new AtomicBoolean();<a name="line.77"></a>
+<span class="sourceLineNo">078</span><a name="line.78"></a>
+<span class="sourceLineNo">079</span> private final long threadWakeFrequency;<a name="line.79"></a>
+<span class="sourceLineNo">080</span> private final HRegionServer server;<a name="line.80"></a>
+<span class="sourceLineNo">081</span> private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();<a name="line.81"></a>
+<span class="sourceLineNo">082</span> private final Object blockSignal = new Object();<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span> private long blockingWaitTime;<a name="line.84"></a>
+<span class="sourceLineNo">085</span> private final LongAdder updatesBlockedMsHighWater = new LongAdder();<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> private final FlushHandler[] flushHandlers;<a name="line.87"></a>
+<span class="sourceLineNo">088</span> private List<FlushRequestListener> flushRequestListeners = new ArrayList<>(1);<a name="line.88"></a>
+<span class="sourceLineNo">089</span><a name="line.89"></a>
+<span class="sourceLineNo">090</span> /**<a name="line.90"></a>
+<span class="sourceLineNo">091</span> * @param conf<a name="line.91"></a>
+<span class="sourceLineNo">092</span> * @param server<a name="line.92"></a>
+<span class="sourceLineNo">093</span> */<a name="line.93"></a>
+<span class="sourceLineNo">094</span> public MemStoreFlusher(final Configuration conf,<a name="line.94"></a>
+<span class="sourceLineNo">095</span> final HRegionServer server) {<a name="line.95"></a>
+<span class="sourceLineNo">096</span> super();<a name="line.96"></a>
+<span class="sourceLineNo">097</span> this.conf = conf;<a name="line.97"></a>
+<span class="sourceLineNo">098</span> this.server = server;<a name="line.98"></a>
+<span class="sourceLineNo">099</span> this.threadWakeFrequency =<a name="line.99"></a>
+<span class="sourceLineNo">100</span> conf.getLong(HConstants.THREAD_WAKE_FREQUENCY, 10 * 1000);<a name="line.100"></a>
+<span class="sourceLineNo">101</span> this.blockingWaitTime = conf.getInt("hbase.hstore.blockingWaitTime",<a name="line.101"></a>
+<span class="sourceLineNo">102</span> 90000);<a name="line.102"></a>
+<span class="sourceLineNo">103</span> int handlerCount = conf.getInt("hbase.hstore.flusher.count", 2);<a name="line.103"></a>
+<span class="sourceLineNo">104</span> this.flushHandlers = new FlushHandler[handlerCount];<a name="line.104"></a>
+<span class="sourceLineNo">105</span> LOG.info("globalMemStoreLimit="<a name="line.105"></a>
+<span class="sourceLineNo">106</span> + TraditionalBinaryPrefix<a name="line.106"></a>
+<span class="sourceLineNo">107</span> .long2String(this.server.getRegionServerAccounting().getGlobalMemStoreLimit(), "", 1)<a name="line.107"></a>
+<span class="sourceLineNo">108</span> + ", globalMemStoreLimitLowMark="<a name="line.108"></a>
+<span class="sourceLineNo">109</span> + TraditionalBinaryPrefix.long2String(<a name="line.109"></a>
+<span class="sourceLineNo">110</span> this.server.getRegionServerAccounting().getGlobalMemStoreLimitLowMark(), "", 1)<a name="line.110"></a>
+<span class="sourceLineNo">111</span> + ", Offheap="<a name="line.111"></a>
+<span class="sourceLineNo">112</span> + (this.server.getRegionServerAccounting().isOffheap()));<a name="line.112"></a>
+<span class="sourceLineNo">113</span> }<a name="line.113"></a>
+<span class="sourceLineNo">114</span><a name="line.114"></a>
+<span class="sourceLineNo">115</span> public LongAdder getUpdatesBlockedMsHighWater() {<a name="line.115"></a>
+<span class="sourceLineNo">116</span> return this.updatesBlockedMsHighWater;<a name="line.116"></a>
+<span class="sourceLineNo">117</span> }<a name="line.117"></a>
+<span class="sourceLineNo">118</span><a name="line.118"></a>
+<span class="sourceLineNo">119</span> /**<a name="line.119"></a>
+<span class="sourceLineNo">120</span> * The memstore across all regions has exceeded the low water mark. Pick<a name="line.120"></a>
+<span class="sourceLineNo">121</span> * one region to flush and flush it synchronously (this is called from the<a name="line.121"></a>
+<span class="sourceLineNo">122</span> * flush thread)<a name="line.122"></a>
+<span class="sourceLineNo">123</span> * @return true if successful<a name="line.123"></a>
+<span class="sourceLineNo">124</span> */<a name="line.124"></a>
+<span class="sourceLineNo">125</span> private boolean flushOneForGlobalPressure() {<a name="line.125"></a>
+<span class="sourceLineNo">126</span> SortedMap<Long, HRegion> regionsBySize = server.getCopyOfOnlineRegionsSortedBySize();<a name="line.126"></a>
+<span class="sourceLineNo">127</span> Set<HRegion> excludedRegions = new HashSet<>();<a name="line.127"></a>
+<span class="sourceLineNo">128</span><a name="line.128"></a>
+<span class="sourceLineNo">129</span> double secondaryMultiplier<a name="line.129"></a>
+<span class="sourceLineNo">130</span> = ServerRegionReplicaUtil.getRegionReplicaStoreFileRefreshMultiplier(conf);<a name="line.130"></a>
+<span class="sourceLineNo">131</span><a name="line.131"></a>
+<span class="sourceLineNo">132</span> boolean flushedOne = false;<a name="line.132"></a>
+<span class="sourceLineNo">133</span> while (!flushedOne) {<a name="line.133"></a>
+<span class="sourceLineNo">134</span> // Find the biggest region that doesn't have too many storefiles<a name="line.134"></a>
+<span class="sourceLineNo">135</span> // (might be null!)<a name="line.135"></a>
+<span class="sourceLineNo">136</span> HRegion bestFlushableRegion = getBiggestMemStoreRegion(regionsBySize, excludedRegions, true);<a name="line.136"></a>
+<span class="sourceLineNo">137</span> // Find the biggest region, total, even if it might have too many flushes.<a name="line.137"></a>
+<span class="sourceLineNo">138</span> HRegion bestAnyRegion = getBiggestMemStoreRegion(<a name="line.138"></a>
+<span class="sourceLineNo">139</span> regionsBySize, excludedRegions, false);<a name="line.139"></a>
+<span class="sourceLineNo">140</span> // Find the biggest region that is a secondary region<a name="line.140"></a>
+<span class="sourceLineNo">141</span> HRegion bestRegionReplica = getBiggestMemStoreOfRegionReplica(regionsBySize,<a name="line.141"></a>
+<span class="sourceLineNo">142</span> excludedRegions);<a name="line.142"></a>
+<span class="sourceLineNo">143</span><a name="line.143"></a>
+<span class="sourceLineNo">144</span> if (bestAnyRegion == null && bestRegionReplica == null) {<a name="line.144"></a>
+<span class="sourceLineNo">145</span> LOG.error("Above memory mark but there are no flushable regions!");<a name="line.145"></a>
+<span class="sourceLineNo">146</span> return false;<a name="line.146"></a>
+<span class="sourceLineNo">147</span> }<a name="line.147"></a>
+<span class="sourceLineNo">148</span><a name="line.148"></a>
+<span class="sourceLineNo">149</span> HRegion regionToFlush;<a name="line.149"></a>
+<span class="sourceLineNo">150</span> if (bestFlushableRegion != null &&<a name="line.150"></a>
+<span class="sourceLineNo">151</span> bestAnyRegion.getMemStoreSize() > 2 * bestFlushableRegion.getMemStoreSize()) {<a name="line.151"></a>
+<span class="sourceLineNo">152</span> // Even if it's not supposed to be flushed, pick a region if it's more than twice<a name="line.152"></a>
+<span class="sourceLineNo">153</span> // as big as the best flushable one - otherwise when we're under pressure we make<a name="line.153"></a>
+<span class="sourceLineNo">154</span> // lots of little flushes and cause lots of compactions, etc, which just makes<a name="line.154"></a>
+<span class="sourceLineNo">155</span> // life worse!<a name="line.155"></a>
+<span class="sourceLineNo">156</span> if (LOG.isDebugEnabled()) {<a name="line.156"></a>
+<span class="sourceLineNo">157</span> LOG.debug("Under global heap pressure: " + "Region "<a name="line.157"></a>
+<span class="sourceLineNo">158</span> + bestAnyRegion.getRegionInfo().getRegionNameAsString()<a name="line.158"></a>
+<span class="sourceLineNo">159</span> + " has too many " + "store files, but is "<a name="line.159"></a>
+<span class="sourceLineNo">160</span> + TraditionalBinaryPrefix.long2String(bestAnyRegion.getMemStoreSize(), "", 1)<a name="line.160"></a>
+<span class="sourceLineNo">161</span> + " vs best flushable region's "<a name="line.161"></a>
+<span class="sourceLineNo">162</span> + TraditionalBinaryPrefix.long2String(bestFlushableRegion.getMemStoreSize(), "", 1)<a name="line.162"></a>
+<span class="sourceLineNo">163</span> + ". Choosing the bigger.");<a name="line.163"></a>
+<span class="sourceLineNo">164</span> }<a name="line.164"></a>
+<span class="sourceLineNo">165</span> regionToFlush = bestAnyRegion;<a name="line.165"></a>
+<span class="sourceLineNo">166</span> } else {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> if (bestFlushableRegion == null) {<a name="line.167"></a>
+<span class="sourceLineNo">168</span> regionToFlush = bestAnyRegion;<a name="line.168"></a>
+<span class="sourceLineNo">169</span> } else {<a name="line.169"></a>
+<span class="sourceLineNo">170</span> regionToFlush = bestFlushableRegion;<a name="line.170"></a>
+<span class="sourceLineNo">171</span> }<a name="line.171"></a>
+<span class="sourceLineNo">172</span> }<a name="line.172"></a>
+<span class="sourceLineNo">173</span><a name="line.173"></a>
+<span class="sourceLineNo">174</span> Preconditions.checkState(<a name="line.174"></a>
+<span class="sourceLineNo">175</span> (regionToFlush != null && regionToFlush.getMemStoreSize() > 0) ||<a name="line.175"></a>
+<span class="sourceLineNo">176</span> (bestRegionReplica != null && bestRegionReplica.getMemStoreSize() > 0));<a name="line.176"></a>
+<span class="sourceLineNo">177</span><a name="line.177"></a>
+<span class="sourceLineNo">178</span> if (regionToFlush == null ||<a name="line.178"></a>
+<span class="sourceLineNo">179</span> (bestRegionReplica != null &&<a name="line.179"></a>
+<span class="sourceLineNo">180</span> ServerRegionReplicaUtil.isRegionReplicaStoreFileRefreshEnabled(conf) &&<a name="line.180"></a>
+<span class="sourceLineNo">181</span> (bestRegionReplica.getMemStoreSize()<a name="line.181"></a>
+<span class="sourceLineNo">182</span> > secondaryMultiplier * regionToFlush.getMemStoreSize()))) {<a name="line.182"></a>
+<span class="sourceLineNo">183</span> LOG.info("Refreshing storefiles of region " + bestRegionReplica +<a name="line.183"></a>
+<span class="sourceLineNo">184</span> " due to global heap pressure. Total memstore datasize=" +<a name="line.184"></a>
+<span class="sourceLineNo">185</span> TraditionalBinaryPrefix.long2String(<a name="line.185"></a>
+<span class="sourceLineNo">186</span> server.getRegionServerAccounting().getGlobalMemStoreDataSize(), "", 1) +<a name="line.186"></a>
+<span class="sourceLineNo">187</span> " memstore heap size=" + TraditionalBinaryPrefix.long2String(<a name="line.187"></a>
+<span class="sourceLineNo">188</span> server.getRegionServerAccounting().getGlobalMemStoreHeapSize(), "", 1));<a name="line.188"></a>
+<span class="sourceLineNo">189</span> flushedOne = refreshStoreFilesAndReclaimMemory(bestRegionReplica);<a name="line.189"></a>
+<span class="sourceLineNo">190</span> if (!flushedOne) {<a name="line.190"></a>
+<span class="sourceLineNo">191</span> LOG.info("Excluding secondary region " + bestRegionReplica +<a name="line.191"></a>
+<span class="sourceLineNo">192</span> " - trying to find a different region to refresh files.");<a name="line.192"></a>
+<span class="sourceLineNo">193</span> excludedRegions.add(bestRegionReplica);<a name="line.193"></a>
+<span class="sourceLineNo">194</span> }<a name="line.194"></a>
+<span class="sourceLineNo">195</span> } else {<a name="line.195"></a>
+<span class="sourceLineNo">196</span> LOG.info("Flush of region " + regionToFlush + " due to global heap pressure. " +<a name="line.196"></a>
+<span class="sourceLineNo">197</span> "Total Memstore size=" +<a name="line.197"></a>
+<span class="sourceLineNo">198</span> TraditionalBinaryPrefix.long2String(<a name="line.198"></a>
+<span class="sourceLineNo">199</span> server.getRegionServerAccounting().getGlobalMemStoreDataSize(), "", 1) +<a name="line.199"></a>
+<span class="sourceLineNo">200</span> ", Region memstore size=" +<a name="line.200"></a>
+<span class="sourceLineNo">201</span> TraditionalBinaryPrefix.long2String(regionToFlush.getMemStoreSize(), "", 1));<a name="line.201"></a>
+<span class="sourceLineNo">202</span> flushedOne = flushRegion(regionToFlush, true, false, FlushLifeCycleTracker.DUMMY);<a name="line.202"></a>
+<span class="sourceLineNo">203</span><a name="line.203"></a>
+<span class="sourceLineNo">204</span> if (!flushedOne) {<a name="line.204"></a>
+<span class="sourceLineNo">205</span> LOG.info("Excluding unflushable region " + regionToFlush +<a name="line.205"></a>
+<span class="sourceLineNo">206</span> " - trying to find a different region to flush.");<a name="line.206"></a>
+<span class="sourceLineNo">207</span> excludedRegions.add(regionToFlush);<a name="line.207"></a>
+<span class="sourceLineNo">208</span> }<a name="line.208"></a>
+<span class="sourceLineNo">209</span> }<a name="line.209"></a>
+<span class="sourceLineNo">210</span> }<a name="line.210"></a>
+<span class="sourceLineNo">211</span> return true;<a name="line.211"></a>
+<span class="sourceLineNo">212</span> }<a name="line.212"></a>
+<span class="sourceLineNo">213</span><a name="line.213"></a>
+<span class="sourceLineNo">214</span> private class FlushHandler extends HasThread {<a name="line.214"></a>
+<span class="sourceLineNo">215</span><a name="line.215"></a>
+<span class="sourceLineNo">216</span> private FlushHandler(String name) {<a name="line.216"></a>
+<span class="sourceLineNo">217</span> super(name);<a name="line.217"></a>
+<span class="sourceLineNo">218</span> }<a name="line.218"></a>
+<span class="sourceLineNo">219</span><a name="line.219"></a>
+<span class="sourceLineNo">220</span> @Override<a name="line.220"></a>
+<span class="sourceLineNo">221</span> public void run() {<a name="line.221"></a>
+<span class="sourceLineNo">222</span> while (!server.isStopped()) {<a name="line.222"></a>
+<span class="sourceLineNo">223</span> FlushQueueEntry fqe = null;<a name="line.223"></a>
+<span class="sourceLineNo">224</span> try {<a name="line.224"></a>
+<span class="sourceLineNo">225</span> wakeupPending.set(false); // allow someone to wake us up again<a name="line.225"></a>
+<span class="sourceLineNo">226</span> fqe = flushQueue.poll(threadWakeFrequency, TimeUnit.MILLISECONDS);<a name="line.226"></a>
+<span class="sourceLineNo">227</span> if (fqe == null || fqe instanceof WakeupFlushThread) {<a name="line.227"></a>
+<span class="sourceLineNo">228</span> FlushType type = isAboveLowWaterMark();<a name="line.228"></a>
+<span class="sourceLineNo">229</span> if (type != FlushType.NORMAL) {<a name="line.229"></a>
+<span class="sourceLineNo">230</span> LOG.debug("Flush thread woke up because memory above low water="<a name="line.230"></a>
+<span class="sourceLineNo">231</span> + TraditionalBinaryPrefix.long2String(<a name="line.231"></a>
+<span class="sourceLineNo">232</span> server.getRegionServerAccounting().getGlobalMemStoreLimitLowMark(), "", 1));<a name="line.232"></a>
+<span class="sourceLineNo">233</span> // For offheap memstore, even if the lower water mark was breached due to heap overhead<a name="line.233"></a>
+<span class="sourceLineNo">234</span> // we still select the regions based on the region's memstore data size.<a name="line.234"></a>
+<span class="sourceLineNo">235</span> // TODO : If we want to decide based on heap over head it can be done without tracking<a name="line.235"></a>
+<span class="sourceLineNo">236</span> // it per region.<a name="line.236"></a>
+<span class="sourceLineNo">237</span> if (!flushOneForGlobalPressure()) {<a name="line.237"></a>
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