http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c0571676/devapidocs/src-html/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.FlushTableSubprocedurePool.html
----------------------------------------------------------------------
diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.FlushTableSubprocedurePool.html
b/devapidocs/src-html/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.FlushTableSubprocedurePool.html
index 9bbfc18..d22fccc 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.FlushTableSubprocedurePool.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.FlushTableSubprocedurePool.html
@@ -54,299 +54,300 @@
<span class="sourceLineNo">046</span>import
org.apache.hadoop.hbase.procedure.Subprocedure;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import
org.apache.hadoop.hbase.procedure.SubprocedureFactory;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import
org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import
org.apache.hadoop.hbase.regionserver.HRegionServer;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import
org.apache.hadoop.hbase.regionserver.Region;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import
org.apache.hadoop.hbase.regionserver.RegionServerServices;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import
org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import
org.apache.zookeeper.KeeperException;<a name="line.53"></a>
-<span class="sourceLineNo">054</span><a name="line.54"></a>
-<span class="sourceLineNo">055</span>/**<a name="line.55"></a>
-<span class="sourceLineNo">056</span> * This manager class handles flushing of
the regions for table on a {@link HRegionServer}.<a name="line.56"></a>
-<span class="sourceLineNo">057</span> */<a name="line.57"></a>
-<span
class="sourceLineNo">058</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)<a
name="line.58"></a>
-<span class="sourceLineNo">059</span>public class
RegionServerFlushTableProcedureManager extends RegionServerProcedureManager {<a
name="line.59"></a>
-<span class="sourceLineNo">060</span> private static final Log LOG =
LogFactory.getLog(RegionServerFlushTableProcedureManager.class);<a
name="line.60"></a>
-<span class="sourceLineNo">061</span><a name="line.61"></a>
-<span class="sourceLineNo">062</span> private static final String
CONCURENT_FLUSH_TASKS_KEY =<a name="line.62"></a>
-<span class="sourceLineNo">063</span>
"hbase.flush.procedure.region.concurrentTasks";<a name="line.63"></a>
-<span class="sourceLineNo">064</span> private static final int
DEFAULT_CONCURRENT_FLUSH_TASKS = 3;<a name="line.64"></a>
-<span class="sourceLineNo">065</span><a name="line.65"></a>
-<span class="sourceLineNo">066</span> public static final String
FLUSH_REQUEST_THREADS_KEY =<a name="line.66"></a>
-<span class="sourceLineNo">067</span>
"hbase.flush.procedure.region.pool.threads";<a name="line.67"></a>
-<span class="sourceLineNo">068</span> public static final int
FLUSH_REQUEST_THREADS_DEFAULT = 10;<a name="line.68"></a>
-<span class="sourceLineNo">069</span><a name="line.69"></a>
-<span class="sourceLineNo">070</span> public static final String
FLUSH_TIMEOUT_MILLIS_KEY =<a name="line.70"></a>
-<span class="sourceLineNo">071</span>
"hbase.flush.procedure.region.timeout";<a name="line.71"></a>
-<span class="sourceLineNo">072</span> public static final long
FLUSH_TIMEOUT_MILLIS_DEFAULT = 60000;<a name="line.72"></a>
-<span class="sourceLineNo">073</span><a name="line.73"></a>
-<span class="sourceLineNo">074</span> public static final String
FLUSH_REQUEST_WAKE_MILLIS_KEY =<a name="line.74"></a>
-<span class="sourceLineNo">075</span>
"hbase.flush.procedure.region.wakefrequency";<a name="line.75"></a>
-<span class="sourceLineNo">076</span> private static final long
FLUSH_REQUEST_WAKE_MILLIS_DEFAULT = 500;<a name="line.76"></a>
-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span> private RegionServerServices rss;<a
name="line.78"></a>
-<span class="sourceLineNo">079</span> private ProcedureMemberRpcs
memberRpcs;<a name="line.79"></a>
-<span class="sourceLineNo">080</span> private ProcedureMember member;<a
name="line.80"></a>
-<span class="sourceLineNo">081</span><a name="line.81"></a>
-<span class="sourceLineNo">082</span> /**<a name="line.82"></a>
-<span class="sourceLineNo">083</span> * Exposed for testing.<a
name="line.83"></a>
-<span class="sourceLineNo">084</span> * @param conf HBase configuration.<a
name="line.84"></a>
-<span class="sourceLineNo">085</span> * @param server region server.<a
name="line.85"></a>
-<span class="sourceLineNo">086</span> * @param memberRpc use specified
memberRpc instance<a name="line.86"></a>
-<span class="sourceLineNo">087</span> * @param procMember use specified
ProcedureMember<a name="line.87"></a>
-<span class="sourceLineNo">088</span> */<a name="line.88"></a>
-<span class="sourceLineNo">089</span>
RegionServerFlushTableProcedureManager(Configuration conf, HRegionServer
server,<a name="line.89"></a>
-<span class="sourceLineNo">090</span> ProcedureMemberRpcs memberRpc,
ProcedureMember procMember) {<a name="line.90"></a>
-<span class="sourceLineNo">091</span> this.rss = server;<a
name="line.91"></a>
-<span class="sourceLineNo">092</span> this.memberRpcs = memberRpc;<a
name="line.92"></a>
-<span class="sourceLineNo">093</span> this.member = procMember;<a
name="line.93"></a>
-<span class="sourceLineNo">094</span> }<a name="line.94"></a>
-<span class="sourceLineNo">095</span><a name="line.95"></a>
-<span class="sourceLineNo">096</span> public
RegionServerFlushTableProcedureManager() {}<a name="line.96"></a>
-<span class="sourceLineNo">097</span><a name="line.97"></a>
-<span class="sourceLineNo">098</span> /**<a name="line.98"></a>
-<span class="sourceLineNo">099</span> * Start accepting flush table
requests.<a name="line.99"></a>
-<span class="sourceLineNo">100</span> */<a name="line.100"></a>
-<span class="sourceLineNo">101</span> @Override<a name="line.101"></a>
-<span class="sourceLineNo">102</span> public void start() {<a
name="line.102"></a>
-<span class="sourceLineNo">103</span> LOG.debug("Start region server flush
procedure manager " + rss.getServerName().toString());<a name="line.103"></a>
-<span class="sourceLineNo">104</span>
this.memberRpcs.start(rss.getServerName().toString(), member);<a
name="line.104"></a>
-<span class="sourceLineNo">105</span> }<a name="line.105"></a>
-<span class="sourceLineNo">106</span><a name="line.106"></a>
-<span class="sourceLineNo">107</span> /**<a name="line.107"></a>
-<span class="sourceLineNo">108</span> * Close <tt>this</tt> and
all running tasks<a name="line.108"></a>
-<span class="sourceLineNo">109</span> * @param force forcefully stop all
running tasks<a name="line.109"></a>
-<span class="sourceLineNo">110</span> * @throws IOException<a
name="line.110"></a>
-<span class="sourceLineNo">111</span> */<a name="line.111"></a>
-<span class="sourceLineNo">112</span> @Override<a name="line.112"></a>
-<span class="sourceLineNo">113</span> public void stop(boolean force) throws
IOException {<a name="line.113"></a>
-<span class="sourceLineNo">114</span> String mode = force ? "abruptly" :
"gracefully";<a name="line.114"></a>
-<span class="sourceLineNo">115</span> LOG.info("Stopping region server
flush procedure manager " + mode + ".");<a name="line.115"></a>
-<span class="sourceLineNo">116</span><a name="line.116"></a>
-<span class="sourceLineNo">117</span> try {<a name="line.117"></a>
-<span class="sourceLineNo">118</span> this.member.close();<a
name="line.118"></a>
-<span class="sourceLineNo">119</span> } finally {<a name="line.119"></a>
-<span class="sourceLineNo">120</span> this.memberRpcs.close();<a
name="line.120"></a>
-<span class="sourceLineNo">121</span> }<a name="line.121"></a>
-<span class="sourceLineNo">122</span> }<a name="line.122"></a>
-<span class="sourceLineNo">123</span><a name="line.123"></a>
-<span class="sourceLineNo">124</span> /**<a name="line.124"></a>
-<span class="sourceLineNo">125</span> * If in a running state, creates the
specified subprocedure to flush table regions.<a name="line.125"></a>
-<span class="sourceLineNo">126</span> *<a name="line.126"></a>
-<span class="sourceLineNo">127</span> * Because this gets the local list of
regions to flush and not the set the master had,<a name="line.127"></a>
-<span class="sourceLineNo">128</span> * there is a possibility of a race
where regions may be missed.<a name="line.128"></a>
-<span class="sourceLineNo">129</span> *<a name="line.129"></a>
-<span class="sourceLineNo">130</span> * @param table<a name="line.130"></a>
-<span class="sourceLineNo">131</span> * @return Subprocedure to submit to
the ProcedureMemeber.<a name="line.131"></a>
-<span class="sourceLineNo">132</span> */<a name="line.132"></a>
-<span class="sourceLineNo">133</span> public Subprocedure
buildSubprocedure(String table) {<a name="line.133"></a>
-<span class="sourceLineNo">134</span><a name="line.134"></a>
-<span class="sourceLineNo">135</span> // don't run the subprocedure if the
parent is stop(ping)<a name="line.135"></a>
-<span class="sourceLineNo">136</span> if (rss.isStopping() ||
rss.isStopped()) {<a name="line.136"></a>
-<span class="sourceLineNo">137</span> throw new
IllegalStateException("Can't start flush region subprocedure on RS: "<a
name="line.137"></a>
-<span class="sourceLineNo">138</span> + rss.getServerName() + ",
because stopping/stopped!");<a name="line.138"></a>
-<span class="sourceLineNo">139</span> }<a name="line.139"></a>
-<span class="sourceLineNo">140</span><a name="line.140"></a>
-<span class="sourceLineNo">141</span> // check to see if this server is
hosting any regions for the table<a name="line.141"></a>
-<span class="sourceLineNo">142</span> List<Region> involvedRegions;<a
name="line.142"></a>
-<span class="sourceLineNo">143</span> try {<a name="line.143"></a>
-<span class="sourceLineNo">144</span> involvedRegions =
getRegionsToFlush(table);<a name="line.144"></a>
-<span class="sourceLineNo">145</span> } catch (IOException e1) {<a
name="line.145"></a>
-<span class="sourceLineNo">146</span> throw new
IllegalStateException("Failed to figure out if there is region to flush.",
e1);<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> // We need to run the subprocedure
even if we have no relevant regions. The coordinator<a name="line.149"></a>
-<span class="sourceLineNo">150</span> // expects participation in the
procedure and without sending message the master procedure<a
name="line.150"></a>
-<span class="sourceLineNo">151</span> // will hang and fail.<a
name="line.151"></a>
-<span class="sourceLineNo">152</span><a name="line.152"></a>
-<span class="sourceLineNo">153</span> LOG.debug("Launching subprocedure to
flush regions for " + table);<a name="line.153"></a>
-<span class="sourceLineNo">154</span> ForeignExceptionDispatcher
exnDispatcher = new ForeignExceptionDispatcher(table);<a name="line.154"></a>
-<span class="sourceLineNo">155</span> Configuration conf =
rss.getConfiguration();<a name="line.155"></a>
-<span class="sourceLineNo">156</span> long timeoutMillis =
conf.getLong(FLUSH_TIMEOUT_MILLIS_KEY,<a name="line.156"></a>
-<span class="sourceLineNo">157</span> FLUSH_TIMEOUT_MILLIS_DEFAULT);<a
name="line.157"></a>
-<span class="sourceLineNo">158</span> long wakeMillis =
conf.getLong(FLUSH_REQUEST_WAKE_MILLIS_KEY,<a name="line.158"></a>
-<span class="sourceLineNo">159</span>
FLUSH_REQUEST_WAKE_MILLIS_DEFAULT);<a name="line.159"></a>
-<span class="sourceLineNo">160</span><a name="line.160"></a>
-<span class="sourceLineNo">161</span> FlushTableSubprocedurePool
taskManager =<a name="line.161"></a>
-<span class="sourceLineNo">162</span> new
FlushTableSubprocedurePool(rss.getServerName().toString(), conf, rss);<a
name="line.162"></a>
-<span class="sourceLineNo">163</span> return new
FlushTableSubprocedure(member, exnDispatcher, wakeMillis,<a name="line.163"></a>
-<span class="sourceLineNo">164</span> timeoutMillis, involvedRegions,
table, taskManager);<a name="line.164"></a>
-<span class="sourceLineNo">165</span> }<a name="line.165"></a>
-<span class="sourceLineNo">166</span><a name="line.166"></a>
-<span class="sourceLineNo">167</span> /**<a name="line.167"></a>
-<span class="sourceLineNo">168</span> * Get the list of regions to flush for
the table on this server<a name="line.168"></a>
-<span class="sourceLineNo">169</span> *<a name="line.169"></a>
-<span class="sourceLineNo">170</span> * It is possible that if a region
moves somewhere between the calls<a name="line.170"></a>
-<span class="sourceLineNo">171</span> * we'll miss the region.<a
name="line.171"></a>
-<span class="sourceLineNo">172</span> *<a name="line.172"></a>
-<span class="sourceLineNo">173</span> * @param table<a name="line.173"></a>
-<span class="sourceLineNo">174</span> * @return the list of online regions.
Empty list is returned if no regions.<a name="line.174"></a>
-<span class="sourceLineNo">175</span> * @throws IOException<a
name="line.175"></a>
-<span class="sourceLineNo">176</span> */<a name="line.176"></a>
-<span class="sourceLineNo">177</span> private List<Region>
getRegionsToFlush(String table) throws IOException {<a name="line.177"></a>
-<span class="sourceLineNo">178</span> return
rss.getRegions(TableName.valueOf(table));<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> public class
FlushTableSubprocedureBuilder implements SubprocedureFactory {<a
name="line.181"></a>
-<span class="sourceLineNo">182</span><a name="line.182"></a>
-<span class="sourceLineNo">183</span> @Override<a name="line.183"></a>
-<span class="sourceLineNo">184</span> public Subprocedure
buildSubprocedure(String name, byte[] data) {<a name="line.184"></a>
-<span class="sourceLineNo">185</span> // The name of the procedure
instance from the master is the table name.<a name="line.185"></a>
-<span class="sourceLineNo">186</span> return
RegionServerFlushTableProcedureManager.this.buildSubprocedure(name);<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> }<a name="line.189"></a>
-<span class="sourceLineNo">190</span><a name="line.190"></a>
-<span class="sourceLineNo">191</span> /**<a name="line.191"></a>
-<span class="sourceLineNo">192</span> * We use the
FlushTableSubprocedurePool, a class specific thread pool instead of<a
name="line.192"></a>
-<span class="sourceLineNo">193</span> * {@link
org.apache.hadoop.hbase.executor.ExecutorService}.<a name="line.193"></a>
-<span class="sourceLineNo">194</span> *<a name="line.194"></a>
-<span class="sourceLineNo">195</span> * It uses a {@link
java.util.concurrent.ExecutorCompletionService} which provides queuing of<a
name="line.195"></a>
-<span class="sourceLineNo">196</span> * completed tasks which lets us
efficiently cancel pending tasks upon the earliest operation<a
name="line.196"></a>
-<span class="sourceLineNo">197</span> * failures.<a name="line.197"></a>
-<span class="sourceLineNo">198</span> */<a name="line.198"></a>
-<span class="sourceLineNo">199</span> static class FlushTableSubprocedurePool
{<a name="line.199"></a>
-<span class="sourceLineNo">200</span> private final Abortable abortable;<a
name="line.200"></a>
-<span class="sourceLineNo">201</span> private final
ExecutorCompletionService<Void> taskPool;<a name="line.201"></a>
-<span class="sourceLineNo">202</span> private final ThreadPoolExecutor
executor;<a name="line.202"></a>
-<span class="sourceLineNo">203</span> private volatile boolean stopped;<a
name="line.203"></a>
-<span class="sourceLineNo">204</span> private final
List<Future<Void>> futures = new ArrayList<>();<a
name="line.204"></a>
-<span class="sourceLineNo">205</span> private final String name;<a
name="line.205"></a>
-<span class="sourceLineNo">206</span><a name="line.206"></a>
-<span class="sourceLineNo">207</span> FlushTableSubprocedurePool(String
name, Configuration conf, Abortable abortable) {<a name="line.207"></a>
-<span class="sourceLineNo">208</span> this.abortable = abortable;<a
name="line.208"></a>
-<span class="sourceLineNo">209</span> // configure the executor service<a
name="line.209"></a>
-<span class="sourceLineNo">210</span> long keepAlive = conf.getLong(<a
name="line.210"></a>
-<span class="sourceLineNo">211</span>
RegionServerFlushTableProcedureManager.FLUSH_TIMEOUT_MILLIS_KEY,<a
name="line.211"></a>
-<span class="sourceLineNo">212</span>
RegionServerFlushTableProcedureManager.FLUSH_TIMEOUT_MILLIS_DEFAULT);<a
name="line.212"></a>
-<span class="sourceLineNo">213</span> int threads =
conf.getInt(CONCURENT_FLUSH_TASKS_KEY, DEFAULT_CONCURRENT_FLUSH_TASKS);<a
name="line.213"></a>
-<span class="sourceLineNo">214</span> this.name = name;<a
name="line.214"></a>
-<span class="sourceLineNo">215</span> executor = new
ThreadPoolExecutor(threads, threads, keepAlive, TimeUnit.MILLISECONDS,<a
name="line.215"></a>
-<span class="sourceLineNo">216</span> new
LinkedBlockingQueue<>(), new DaemonThreadFactory("rs("<a
name="line.216"></a>
-<span class="sourceLineNo">217</span> + name +
")-flush-proc-pool"));<a name="line.217"></a>
-<span class="sourceLineNo">218</span>
executor.allowCoreThreadTimeOut(true);<a name="line.218"></a>
-<span class="sourceLineNo">219</span> taskPool = new
ExecutorCompletionService<>(executor);<a name="line.219"></a>
-<span class="sourceLineNo">220</span> }<a name="line.220"></a>
-<span class="sourceLineNo">221</span><a name="line.221"></a>
-<span class="sourceLineNo">222</span> boolean hasTasks() {<a
name="line.222"></a>
-<span class="sourceLineNo">223</span> return futures.size() != 0;<a
name="line.223"></a>
-<span class="sourceLineNo">224</span> }<a name="line.224"></a>
-<span class="sourceLineNo">225</span><a name="line.225"></a>
-<span class="sourceLineNo">226</span> /**<a name="line.226"></a>
-<span class="sourceLineNo">227</span> * Submit a task to the pool.<a
name="line.227"></a>
-<span class="sourceLineNo">228</span> *<a name="line.228"></a>
-<span class="sourceLineNo">229</span> * NOTE: all must be submitted before
you can safely {@link #waitForOutstandingTasks()}.<a name="line.229"></a>
-<span class="sourceLineNo">230</span> */<a name="line.230"></a>
-<span class="sourceLineNo">231</span> void submitTask(final
Callable<Void> task) {<a name="line.231"></a>
-<span class="sourceLineNo">232</span> Future<Void> f =
this.taskPool.submit(task);<a name="line.232"></a>
-<span class="sourceLineNo">233</span> futures.add(f);<a
name="line.233"></a>
-<span class="sourceLineNo">234</span> }<a name="line.234"></a>
-<span class="sourceLineNo">235</span><a name="line.235"></a>
-<span class="sourceLineNo">236</span> /**<a name="line.236"></a>
-<span class="sourceLineNo">237</span> * Wait for all of the currently
outstanding tasks submitted via {@link #submitTask(Callable)}.<a
name="line.237"></a>
-<span class="sourceLineNo">238</span> * This *must* be called after all
tasks are submitted via submitTask.<a name="line.238"></a>
-<span class="sourceLineNo">239</span> *<a name="line.239"></a>
-<span class="sourceLineNo">240</span> * @return <tt>true</tt>
on success, <tt>false</tt> otherwise<a name="line.240"></a>
-<span class="sourceLineNo">241</span> * @throws InterruptedException<a
name="line.241"></a>
-<span class="sourceLineNo">242</span> */<a name="line.242"></a>
-<span class="sourceLineNo">243</span> boolean waitForOutstandingTasks()
throws ForeignException, InterruptedException {<a name="line.243"></a>
-<span class="sourceLineNo">244</span> LOG.debug("Waiting for local region
flush to finish.");<a name="line.244"></a>
-<span class="sourceLineNo">245</span><a name="line.245"></a>
-<span class="sourceLineNo">246</span> int sz = futures.size();<a
name="line.246"></a>
-<span class="sourceLineNo">247</span> try {<a name="line.247"></a>
-<span class="sourceLineNo">248</span> // Using the completion service
to process the futures.<a name="line.248"></a>
-<span class="sourceLineNo">249</span> for (int i = 0; i < sz; i++)
{<a name="line.249"></a>
-<span class="sourceLineNo">250</span> Future<Void> f =
taskPool.take();<a name="line.250"></a>
-<span class="sourceLineNo">251</span> f.get();<a name="line.251"></a>
-<span class="sourceLineNo">252</span> if (!futures.remove(f)) {<a
name="line.252"></a>
-<span class="sourceLineNo">253</span> LOG.warn("unexpected future"
+ f);<a name="line.253"></a>
-<span class="sourceLineNo">254</span> }<a name="line.254"></a>
-<span class="sourceLineNo">255</span> LOG.debug("Completed " + (i+1)
+ "/" + sz + " local region flush tasks.");<a name="line.255"></a>
-<span class="sourceLineNo">256</span> }<a name="line.256"></a>
-<span class="sourceLineNo">257</span> LOG.debug("Completed " + sz + "
local region flush tasks.");<a name="line.257"></a>
-<span class="sourceLineNo">258</span> return true;<a
name="line.258"></a>
-<span class="sourceLineNo">259</span> } catch (InterruptedException e)
{<a name="line.259"></a>
-<span class="sourceLineNo">260</span> LOG.warn("Got
InterruptedException in FlushSubprocedurePool", e);<a name="line.260"></a>
-<span class="sourceLineNo">261</span> if (!stopped) {<a
name="line.261"></a>
-<span class="sourceLineNo">262</span>
Thread.currentThread().interrupt();<a name="line.262"></a>
-<span class="sourceLineNo">263</span> throw new
ForeignException("FlushSubprocedurePool", e);<a name="line.263"></a>
-<span class="sourceLineNo">264</span> }<a name="line.264"></a>
-<span class="sourceLineNo">265</span> // we are stopped so we can just
exit.<a name="line.265"></a>
-<span class="sourceLineNo">266</span> } catch (ExecutionException e) {<a
name="line.266"></a>
-<span class="sourceLineNo">267</span> Throwable cause = e.getCause();<a
name="line.267"></a>
-<span class="sourceLineNo">268</span> if (cause instanceof
ForeignException) {<a name="line.268"></a>
-<span class="sourceLineNo">269</span> LOG.warn("Rethrowing
ForeignException from FlushSubprocedurePool", e);<a name="line.269"></a>
-<span class="sourceLineNo">270</span> throw
(ForeignException)e.getCause();<a name="line.270"></a>
-<span class="sourceLineNo">271</span> } else if (cause instanceof
DroppedSnapshotException) {<a name="line.271"></a>
-<span class="sourceLineNo">272</span> // we have to abort the region
server according to contract of flush<a name="line.272"></a>
-<span class="sourceLineNo">273</span> abortable.abort("Received
DroppedSnapshotException, aborting", cause);<a name="line.273"></a>
-<span class="sourceLineNo">274</span> }<a name="line.274"></a>
-<span class="sourceLineNo">275</span> LOG.warn("Got Exception in
FlushSubprocedurePool", e);<a name="line.275"></a>
-<span class="sourceLineNo">276</span> throw new ForeignException(name,
e.getCause());<a name="line.276"></a>
-<span class="sourceLineNo">277</span> } finally {<a name="line.277"></a>
-<span class="sourceLineNo">278</span> cancelTasks();<a
name="line.278"></a>
-<span class="sourceLineNo">279</span> }<a name="line.279"></a>
-<span class="sourceLineNo">280</span> return false;<a name="line.280"></a>
-<span class="sourceLineNo">281</span> }<a name="line.281"></a>
-<span class="sourceLineNo">282</span><a name="line.282"></a>
-<span class="sourceLineNo">283</span> /**<a name="line.283"></a>
-<span class="sourceLineNo">284</span> * This attempts to cancel out all
pending and in progress tasks. Does not interrupt the running<a
name="line.284"></a>
-<span class="sourceLineNo">285</span> * tasks itself. An ongoing
HRegion.flush() should not be interrupted (see HBASE-13877).<a
name="line.285"></a>
-<span class="sourceLineNo">286</span> * @throws InterruptedException<a
name="line.286"></a>
-<span class="sourceLineNo">287</span> */<a name="line.287"></a>
-<span class="sourceLineNo">288</span> void cancelTasks() throws
InterruptedException {<a name="line.288"></a>
-<span class="sourceLineNo">289</span>
Collection<Future<Void>> tasks = futures;<a name="line.289"></a>
-<span class="sourceLineNo">290</span> LOG.debug("cancelling " +
tasks.size() + " flush region tasks " + name);<a name="line.290"></a>
-<span class="sourceLineNo">291</span> for (Future<Void> f: tasks)
{<a name="line.291"></a>
-<span class="sourceLineNo">292</span> f.cancel(false);<a
name="line.292"></a>
-<span class="sourceLineNo">293</span> }<a name="line.293"></a>
-<span class="sourceLineNo">294</span><a name="line.294"></a>
-<span class="sourceLineNo">295</span> // evict remaining tasks and
futures from taskPool.<a name="line.295"></a>
-<span class="sourceLineNo">296</span> futures.clear();<a
name="line.296"></a>
-<span class="sourceLineNo">297</span> while (taskPool.poll() != null)
{}<a name="line.297"></a>
-<span class="sourceLineNo">298</span> stop();<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> * Gracefully shutdown the thread
pool. An ongoing HRegion.flush() should not be<a name="line.302"></a>
-<span class="sourceLineNo">303</span> * interrupted (see HBASE-13877)<a
name="line.303"></a>
-<span class="sourceLineNo">304</span> */<a name="line.304"></a>
-<span class="sourceLineNo">305</span> void stop() {<a name="line.305"></a>
-<span class="sourceLineNo">306</span> if (this.stopped) return;<a
name="line.306"></a>
-<span class="sourceLineNo">307</span><a name="line.307"></a>
-<span class="sourceLineNo">308</span> this.stopped = true;<a
name="line.308"></a>
-<span class="sourceLineNo">309</span> this.executor.shutdown();<a
name="line.309"></a>
-<span class="sourceLineNo">310</span> }<a name="line.310"></a>
-<span class="sourceLineNo">311</span> }<a name="line.311"></a>
-<span class="sourceLineNo">312</span><a name="line.312"></a>
-<span class="sourceLineNo">313</span> /**<a name="line.313"></a>
-<span class="sourceLineNo">314</span> * Initialize this region server flush
procedure manager<a name="line.314"></a>
-<span class="sourceLineNo">315</span> * Uses a zookeeper based member
controller.<a name="line.315"></a>
-<span class="sourceLineNo">316</span> * @param rss region server<a
name="line.316"></a>
-<span class="sourceLineNo">317</span> * @throws KeeperException if the
zookeeper cannot be reached<a name="line.317"></a>
-<span class="sourceLineNo">318</span> */<a name="line.318"></a>
-<span class="sourceLineNo">319</span> @Override<a name="line.319"></a>
-<span class="sourceLineNo">320</span> public void
initialize(RegionServerServices rss) throws KeeperException {<a
name="line.320"></a>
-<span class="sourceLineNo">321</span> this.rss = rss;<a name="line.321"></a>
-<span class="sourceLineNo">322</span> ZooKeeperWatcher zkw =
rss.getZooKeeper();<a name="line.322"></a>
-<span class="sourceLineNo">323</span> this.memberRpcs = new
ZKProcedureMemberRpcs(zkw,<a name="line.323"></a>
-<span class="sourceLineNo">324</span>
MasterFlushTableProcedureManager.FLUSH_TABLE_PROCEDURE_SIGNATURE);<a
name="line.324"></a>
-<span class="sourceLineNo">325</span><a name="line.325"></a>
-<span class="sourceLineNo">326</span> Configuration conf =
rss.getConfiguration();<a name="line.326"></a>
-<span class="sourceLineNo">327</span> long keepAlive =
conf.getLong(FLUSH_TIMEOUT_MILLIS_KEY, FLUSH_TIMEOUT_MILLIS_DEFAULT);<a
name="line.327"></a>
-<span class="sourceLineNo">328</span> int opThreads =
conf.getInt(FLUSH_REQUEST_THREADS_KEY, FLUSH_REQUEST_THREADS_DEFAULT);<a
name="line.328"></a>
-<span class="sourceLineNo">329</span><a name="line.329"></a>
-<span class="sourceLineNo">330</span> // create the actual flush table
procedure member<a name="line.330"></a>
-<span class="sourceLineNo">331</span> ThreadPoolExecutor pool =
ProcedureMember.defaultPool(rss.getServerName().toString(),<a
name="line.331"></a>
-<span class="sourceLineNo">332</span> opThreads, keepAlive);<a
name="line.332"></a>
-<span class="sourceLineNo">333</span> this.member = new
ProcedureMember(memberRpcs, pool, new FlushTableSubprocedureBuilder());<a
name="line.333"></a>
-<span class="sourceLineNo">334</span> }<a name="line.334"></a>
-<span class="sourceLineNo">335</span><a name="line.335"></a>
-<span class="sourceLineNo">336</span> @Override<a name="line.336"></a>
-<span class="sourceLineNo">337</span> public String getProcedureSignature()
{<a name="line.337"></a>
-<span class="sourceLineNo">338</span> return
MasterFlushTableProcedureManager.FLUSH_TABLE_PROCEDURE_SIGNATURE;<a
name="line.338"></a>
-<span class="sourceLineNo">339</span> }<a name="line.339"></a>
-<span class="sourceLineNo">340</span><a name="line.340"></a>
-<span class="sourceLineNo">341</span>}<a name="line.341"></a>
+<span class="sourceLineNo">049</span>import
org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import
org.apache.hadoop.hbase.regionserver.HRegionServer;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import
org.apache.hadoop.hbase.regionserver.Region;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import
org.apache.hadoop.hbase.regionserver.RegionServerServices;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import
org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import
org.apache.zookeeper.KeeperException;<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span>/**<a name="line.56"></a>
+<span class="sourceLineNo">057</span> * This manager class handles flushing of
the regions for table on a {@link HRegionServer}.<a name="line.57"></a>
+<span class="sourceLineNo">058</span> */<a name="line.58"></a>
+<span
class="sourceLineNo">059</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)<a
name="line.59"></a>
+<span class="sourceLineNo">060</span>public class
RegionServerFlushTableProcedureManager extends RegionServerProcedureManager {<a
name="line.60"></a>
+<span class="sourceLineNo">061</span> private static final Log LOG =
LogFactory.getLog(RegionServerFlushTableProcedureManager.class);<a
name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span> private static final String
CONCURENT_FLUSH_TASKS_KEY =<a name="line.63"></a>
+<span class="sourceLineNo">064</span>
"hbase.flush.procedure.region.concurrentTasks";<a name="line.64"></a>
+<span class="sourceLineNo">065</span> private static final int
DEFAULT_CONCURRENT_FLUSH_TASKS = 3;<a name="line.65"></a>
+<span class="sourceLineNo">066</span><a name="line.66"></a>
+<span class="sourceLineNo">067</span> public static final String
FLUSH_REQUEST_THREADS_KEY =<a name="line.67"></a>
+<span class="sourceLineNo">068</span>
"hbase.flush.procedure.region.pool.threads";<a name="line.68"></a>
+<span class="sourceLineNo">069</span> public static final int
FLUSH_REQUEST_THREADS_DEFAULT = 10;<a name="line.69"></a>
+<span class="sourceLineNo">070</span><a name="line.70"></a>
+<span class="sourceLineNo">071</span> public static final String
FLUSH_TIMEOUT_MILLIS_KEY =<a name="line.71"></a>
+<span class="sourceLineNo">072</span>
"hbase.flush.procedure.region.timeout";<a name="line.72"></a>
+<span class="sourceLineNo">073</span> public static final long
FLUSH_TIMEOUT_MILLIS_DEFAULT = 60000;<a name="line.73"></a>
+<span class="sourceLineNo">074</span><a name="line.74"></a>
+<span class="sourceLineNo">075</span> public static final String
FLUSH_REQUEST_WAKE_MILLIS_KEY =<a name="line.75"></a>
+<span class="sourceLineNo">076</span>
"hbase.flush.procedure.region.wakefrequency";<a name="line.76"></a>
+<span class="sourceLineNo">077</span> private static final long
FLUSH_REQUEST_WAKE_MILLIS_DEFAULT = 500;<a name="line.77"></a>
+<span class="sourceLineNo">078</span><a name="line.78"></a>
+<span class="sourceLineNo">079</span> private RegionServerServices rss;<a
name="line.79"></a>
+<span class="sourceLineNo">080</span> private ProcedureMemberRpcs
memberRpcs;<a name="line.80"></a>
+<span class="sourceLineNo">081</span> private ProcedureMember member;<a
name="line.81"></a>
+<span class="sourceLineNo">082</span><a name="line.82"></a>
+<span class="sourceLineNo">083</span> /**<a name="line.83"></a>
+<span class="sourceLineNo">084</span> * Exposed for testing.<a
name="line.84"></a>
+<span class="sourceLineNo">085</span> * @param conf HBase configuration.<a
name="line.85"></a>
+<span class="sourceLineNo">086</span> * @param server region server.<a
name="line.86"></a>
+<span class="sourceLineNo">087</span> * @param memberRpc use specified
memberRpc instance<a name="line.87"></a>
+<span class="sourceLineNo">088</span> * @param procMember use specified
ProcedureMember<a name="line.88"></a>
+<span class="sourceLineNo">089</span> */<a name="line.89"></a>
+<span class="sourceLineNo">090</span>
RegionServerFlushTableProcedureManager(Configuration conf, HRegionServer
server,<a name="line.90"></a>
+<span class="sourceLineNo">091</span> ProcedureMemberRpcs memberRpc,
ProcedureMember procMember) {<a name="line.91"></a>
+<span class="sourceLineNo">092</span> this.rss = server;<a
name="line.92"></a>
+<span class="sourceLineNo">093</span> this.memberRpcs = memberRpc;<a
name="line.93"></a>
+<span class="sourceLineNo">094</span> this.member = procMember;<a
name="line.94"></a>
+<span class="sourceLineNo">095</span> }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span> public
RegionServerFlushTableProcedureManager() {}<a name="line.97"></a>
+<span class="sourceLineNo">098</span><a name="line.98"></a>
+<span class="sourceLineNo">099</span> /**<a name="line.99"></a>
+<span class="sourceLineNo">100</span> * Start accepting flush table
requests.<a name="line.100"></a>
+<span class="sourceLineNo">101</span> */<a name="line.101"></a>
+<span class="sourceLineNo">102</span> @Override<a name="line.102"></a>
+<span class="sourceLineNo">103</span> public void start() {<a
name="line.103"></a>
+<span class="sourceLineNo">104</span> LOG.debug("Start region server flush
procedure manager " + rss.getServerName().toString());<a name="line.104"></a>
+<span class="sourceLineNo">105</span>
this.memberRpcs.start(rss.getServerName().toString(), member);<a
name="line.105"></a>
+<span class="sourceLineNo">106</span> }<a name="line.106"></a>
+<span class="sourceLineNo">107</span><a name="line.107"></a>
+<span class="sourceLineNo">108</span> /**<a name="line.108"></a>
+<span class="sourceLineNo">109</span> * Close <tt>this</tt> and
all running tasks<a name="line.109"></a>
+<span class="sourceLineNo">110</span> * @param force forcefully stop all
running tasks<a name="line.110"></a>
+<span class="sourceLineNo">111</span> * @throws IOException<a
name="line.111"></a>
+<span class="sourceLineNo">112</span> */<a name="line.112"></a>
+<span class="sourceLineNo">113</span> @Override<a name="line.113"></a>
+<span class="sourceLineNo">114</span> public void stop(boolean force) throws
IOException {<a name="line.114"></a>
+<span class="sourceLineNo">115</span> String mode = force ? "abruptly" :
"gracefully";<a name="line.115"></a>
+<span class="sourceLineNo">116</span> LOG.info("Stopping region server
flush procedure manager " + mode + ".");<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> try {<a name="line.118"></a>
+<span class="sourceLineNo">119</span> this.member.close();<a
name="line.119"></a>
+<span class="sourceLineNo">120</span> } finally {<a name="line.120"></a>
+<span class="sourceLineNo">121</span> this.memberRpcs.close();<a
name="line.121"></a>
+<span class="sourceLineNo">122</span> }<a name="line.122"></a>
+<span class="sourceLineNo">123</span> }<a name="line.123"></a>
+<span class="sourceLineNo">124</span><a name="line.124"></a>
+<span class="sourceLineNo">125</span> /**<a name="line.125"></a>
+<span class="sourceLineNo">126</span> * If in a running state, creates the
specified subprocedure to flush table regions.<a name="line.126"></a>
+<span class="sourceLineNo">127</span> *<a name="line.127"></a>
+<span class="sourceLineNo">128</span> * Because this gets the local list of
regions to flush and not the set the master had,<a name="line.128"></a>
+<span class="sourceLineNo">129</span> * there is a possibility of a race
where regions may be missed.<a name="line.129"></a>
+<span class="sourceLineNo">130</span> *<a name="line.130"></a>
+<span class="sourceLineNo">131</span> * @param table<a name="line.131"></a>
+<span class="sourceLineNo">132</span> * @return Subprocedure to submit to
the ProcedureMemeber.<a name="line.132"></a>
+<span class="sourceLineNo">133</span> */<a name="line.133"></a>
+<span class="sourceLineNo">134</span> public Subprocedure
buildSubprocedure(String table) {<a name="line.134"></a>
+<span class="sourceLineNo">135</span><a name="line.135"></a>
+<span class="sourceLineNo">136</span> // don't run the subprocedure if the
parent is stop(ping)<a name="line.136"></a>
+<span class="sourceLineNo">137</span> if (rss.isStopping() ||
rss.isStopped()) {<a name="line.137"></a>
+<span class="sourceLineNo">138</span> throw new
IllegalStateException("Can't start flush region subprocedure on RS: "<a
name="line.138"></a>
+<span class="sourceLineNo">139</span> + rss.getServerName() + ",
because stopping/stopped!");<a name="line.139"></a>
+<span class="sourceLineNo">140</span> }<a name="line.140"></a>
+<span class="sourceLineNo">141</span><a name="line.141"></a>
+<span class="sourceLineNo">142</span> // check to see if this server is
hosting any regions for the table<a name="line.142"></a>
+<span class="sourceLineNo">143</span> List<HRegion>
involvedRegions;<a name="line.143"></a>
+<span class="sourceLineNo">144</span> try {<a name="line.144"></a>
+<span class="sourceLineNo">145</span> involvedRegions =
getRegionsToFlush(table);<a name="line.145"></a>
+<span class="sourceLineNo">146</span> } catch (IOException e1) {<a
name="line.146"></a>
+<span class="sourceLineNo">147</span> throw new
IllegalStateException("Failed to figure out if there is region to flush.",
e1);<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> // We need to run the subprocedure
even if we have no relevant regions. The coordinator<a name="line.150"></a>
+<span class="sourceLineNo">151</span> // expects participation in the
procedure and without sending message the master procedure<a
name="line.151"></a>
+<span class="sourceLineNo">152</span> // will hang and fail.<a
name="line.152"></a>
+<span class="sourceLineNo">153</span><a name="line.153"></a>
+<span class="sourceLineNo">154</span> LOG.debug("Launching subprocedure to
flush regions for " + table);<a name="line.154"></a>
+<span class="sourceLineNo">155</span> ForeignExceptionDispatcher
exnDispatcher = new ForeignExceptionDispatcher(table);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> Configuration conf =
rss.getConfiguration();<a name="line.156"></a>
+<span class="sourceLineNo">157</span> long timeoutMillis =
conf.getLong(FLUSH_TIMEOUT_MILLIS_KEY,<a name="line.157"></a>
+<span class="sourceLineNo">158</span> FLUSH_TIMEOUT_MILLIS_DEFAULT);<a
name="line.158"></a>
+<span class="sourceLineNo">159</span> long wakeMillis =
conf.getLong(FLUSH_REQUEST_WAKE_MILLIS_KEY,<a name="line.159"></a>
+<span class="sourceLineNo">160</span>
FLUSH_REQUEST_WAKE_MILLIS_DEFAULT);<a name="line.160"></a>
+<span class="sourceLineNo">161</span><a name="line.161"></a>
+<span class="sourceLineNo">162</span> FlushTableSubprocedurePool
taskManager =<a name="line.162"></a>
+<span class="sourceLineNo">163</span> new
FlushTableSubprocedurePool(rss.getServerName().toString(), conf, rss);<a
name="line.163"></a>
+<span class="sourceLineNo">164</span> return new
FlushTableSubprocedure(member, exnDispatcher, wakeMillis,<a name="line.164"></a>
+<span class="sourceLineNo">165</span> timeoutMillis, involvedRegions,
table, taskManager);<a name="line.165"></a>
+<span class="sourceLineNo">166</span> }<a name="line.166"></a>
+<span class="sourceLineNo">167</span><a name="line.167"></a>
+<span class="sourceLineNo">168</span> /**<a name="line.168"></a>
+<span class="sourceLineNo">169</span> * Get the list of regions to flush for
the table on this server<a name="line.169"></a>
+<span class="sourceLineNo">170</span> *<a name="line.170"></a>
+<span class="sourceLineNo">171</span> * It is possible that if a region
moves somewhere between the calls<a name="line.171"></a>
+<span class="sourceLineNo">172</span> * we'll miss the region.<a
name="line.172"></a>
+<span class="sourceLineNo">173</span> *<a name="line.173"></a>
+<span class="sourceLineNo">174</span> * @param table<a name="line.174"></a>
+<span class="sourceLineNo">175</span> * @return the list of online regions.
Empty list is returned if no regions.<a name="line.175"></a>
+<span class="sourceLineNo">176</span> * @throws IOException<a
name="line.176"></a>
+<span class="sourceLineNo">177</span> */<a name="line.177"></a>
+<span class="sourceLineNo">178</span> private List<HRegion>
getRegionsToFlush(String table) throws IOException {<a name="line.178"></a>
+<span class="sourceLineNo">179</span> return (List<HRegion>)
rss.getRegions(TableName.valueOf(table));<a name="line.179"></a>
+<span class="sourceLineNo">180</span> }<a name="line.180"></a>
+<span class="sourceLineNo">181</span><a name="line.181"></a>
+<span class="sourceLineNo">182</span> public class
FlushTableSubprocedureBuilder implements SubprocedureFactory {<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 Subprocedure
buildSubprocedure(String name, byte[] data) {<a name="line.185"></a>
+<span class="sourceLineNo">186</span> // The name of the procedure
instance from the master is the table name.<a name="line.186"></a>
+<span class="sourceLineNo">187</span> return
RegionServerFlushTableProcedureManager.this.buildSubprocedure(name);<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> }<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> * We use the
FlushTableSubprocedurePool, a class specific thread pool instead of<a
name="line.193"></a>
+<span class="sourceLineNo">194</span> * {@link
org.apache.hadoop.hbase.executor.ExecutorService}.<a name="line.194"></a>
+<span class="sourceLineNo">195</span> *<a name="line.195"></a>
+<span class="sourceLineNo">196</span> * It uses a {@link
java.util.concurrent.ExecutorCompletionService} which provides queuing of<a
name="line.196"></a>
+<span class="sourceLineNo">197</span> * completed tasks which lets us
efficiently cancel pending tasks upon the earliest operation<a
name="line.197"></a>
+<span class="sourceLineNo">198</span> * failures.<a name="line.198"></a>
+<span class="sourceLineNo">199</span> */<a name="line.199"></a>
+<span class="sourceLineNo">200</span> static class FlushTableSubprocedurePool
{<a name="line.200"></a>
+<span class="sourceLineNo">201</span> private final Abortable abortable;<a
name="line.201"></a>
+<span class="sourceLineNo">202</span> private final
ExecutorCompletionService<Void> taskPool;<a name="line.202"></a>
+<span class="sourceLineNo">203</span> private final ThreadPoolExecutor
executor;<a name="line.203"></a>
+<span class="sourceLineNo">204</span> private volatile boolean stopped;<a
name="line.204"></a>
+<span class="sourceLineNo">205</span> private final
List<Future<Void>> futures = new ArrayList<>();<a
name="line.205"></a>
+<span class="sourceLineNo">206</span> private final String name;<a
name="line.206"></a>
+<span class="sourceLineNo">207</span><a name="line.207"></a>
+<span class="sourceLineNo">208</span> FlushTableSubprocedurePool(String
name, Configuration conf, Abortable abortable) {<a name="line.208"></a>
+<span class="sourceLineNo">209</span> this.abortable = abortable;<a
name="line.209"></a>
+<span class="sourceLineNo">210</span> // configure the executor service<a
name="line.210"></a>
+<span class="sourceLineNo">211</span> long keepAlive = conf.getLong(<a
name="line.211"></a>
+<span class="sourceLineNo">212</span>
RegionServerFlushTableProcedureManager.FLUSH_TIMEOUT_MILLIS_KEY,<a
name="line.212"></a>
+<span class="sourceLineNo">213</span>
RegionServerFlushTableProcedureManager.FLUSH_TIMEOUT_MILLIS_DEFAULT);<a
name="line.213"></a>
+<span class="sourceLineNo">214</span> int threads =
conf.getInt(CONCURENT_FLUSH_TASKS_KEY, DEFAULT_CONCURRENT_FLUSH_TASKS);<a
name="line.214"></a>
+<span class="sourceLineNo">215</span> this.name = name;<a
name="line.215"></a>
+<span class="sourceLineNo">216</span> executor = new
ThreadPoolExecutor(threads, threads, keepAlive, TimeUnit.MILLISECONDS,<a
name="line.216"></a>
+<span class="sourceLineNo">217</span> new
LinkedBlockingQueue<>(), new DaemonThreadFactory("rs("<a
name="line.217"></a>
+<span class="sourceLineNo">218</span> + name +
")-flush-proc-pool"));<a name="line.218"></a>
+<span class="sourceLineNo">219</span>
executor.allowCoreThreadTimeOut(true);<a name="line.219"></a>
+<span class="sourceLineNo">220</span> taskPool = new
ExecutorCompletionService<>(executor);<a name="line.220"></a>
+<span class="sourceLineNo">221</span> }<a name="line.221"></a>
+<span class="sourceLineNo">222</span><a name="line.222"></a>
+<span class="sourceLineNo">223</span> boolean hasTasks() {<a
name="line.223"></a>
+<span class="sourceLineNo">224</span> return futures.size() != 0;<a
name="line.224"></a>
+<span class="sourceLineNo">225</span> }<a name="line.225"></a>
+<span class="sourceLineNo">226</span><a name="line.226"></a>
+<span class="sourceLineNo">227</span> /**<a name="line.227"></a>
+<span class="sourceLineNo">228</span> * Submit a task to the pool.<a
name="line.228"></a>
+<span class="sourceLineNo">229</span> *<a name="line.229"></a>
+<span class="sourceLineNo">230</span> * NOTE: all must be submitted before
you can safely {@link #waitForOutstandingTasks()}.<a name="line.230"></a>
+<span class="sourceLineNo">231</span> */<a name="line.231"></a>
+<span class="sourceLineNo">232</span> void submitTask(final
Callable<Void> task) {<a name="line.232"></a>
+<span class="sourceLineNo">233</span> Future<Void> f =
this.taskPool.submit(task);<a name="line.233"></a>
+<span class="sourceLineNo">234</span> futures.add(f);<a
name="line.234"></a>
+<span class="sourceLineNo">235</span> }<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> * Wait for all of the currently
outstanding tasks submitted via {@link #submitTask(Callable)}.<a
name="line.238"></a>
+<span class="sourceLineNo">239</span> * This *must* be called after all
tasks are submitted via submitTask.<a name="line.239"></a>
+<span class="sourceLineNo">240</span> *<a name="line.240"></a>
+<span class="sourceLineNo">241</span> * @return <tt>true</tt>
on success, <tt>false</tt> otherwise<a name="line.241"></a>
+<span class="sourceLineNo">242</span> * @throws InterruptedException<a
name="line.242"></a>
+<span class="sourceLineNo">243</span> */<a name="line.243"></a>
+<span class="sourceLineNo">244</span> boolean waitForOutstandingTasks()
throws ForeignException, InterruptedException {<a name="line.244"></a>
+<span class="sourceLineNo">245</span> LOG.debug("Waiting for local region
flush to finish.");<a name="line.245"></a>
+<span class="sourceLineNo">246</span><a name="line.246"></a>
+<span class="sourceLineNo">247</span> int sz = futures.size();<a
name="line.247"></a>
+<span class="sourceLineNo">248</span> try {<a name="line.248"></a>
+<span class="sourceLineNo">249</span> // Using the completion service
to process the futures.<a name="line.249"></a>
+<span class="sourceLineNo">250</span> for (int i = 0; i < sz; i++)
{<a name="line.250"></a>
+<span class="sourceLineNo">251</span> Future<Void> f =
taskPool.take();<a name="line.251"></a>
+<span class="sourceLineNo">252</span> f.get();<a name="line.252"></a>
+<span class="sourceLineNo">253</span> if (!futures.remove(f)) {<a
name="line.253"></a>
+<span class="sourceLineNo">254</span> LOG.warn("unexpected future"
+ f);<a name="line.254"></a>
+<span class="sourceLineNo">255</span> }<a name="line.255"></a>
+<span class="sourceLineNo">256</span> LOG.debug("Completed " + (i+1)
+ "/" + sz + " local region flush tasks.");<a name="line.256"></a>
+<span class="sourceLineNo">257</span> }<a name="line.257"></a>
+<span class="sourceLineNo">258</span> LOG.debug("Completed " + sz + "
local region flush tasks.");<a name="line.258"></a>
+<span class="sourceLineNo">259</span> return true;<a
name="line.259"></a>
+<span class="sourceLineNo">260</span> } catch (InterruptedException e)
{<a name="line.260"></a>
+<span class="sourceLineNo">261</span> LOG.warn("Got
InterruptedException in FlushSubprocedurePool", e);<a name="line.261"></a>
+<span class="sourceLineNo">262</span> if (!stopped) {<a
name="line.262"></a>
+<span class="sourceLineNo">263</span>
Thread.currentThread().interrupt();<a name="line.263"></a>
+<span class="sourceLineNo">264</span> throw new
ForeignException("FlushSubprocedurePool", e);<a name="line.264"></a>
+<span class="sourceLineNo">265</span> }<a name="line.265"></a>
+<span class="sourceLineNo">266</span> // we are stopped so we can just
exit.<a name="line.266"></a>
+<span class="sourceLineNo">267</span> } catch (ExecutionException e) {<a
name="line.267"></a>
+<span class="sourceLineNo">268</span> Throwable cause = e.getCause();<a
name="line.268"></a>
+<span class="sourceLineNo">269</span> if (cause instanceof
ForeignException) {<a name="line.269"></a>
+<span class="sourceLineNo">270</span> LOG.warn("Rethrowing
ForeignException from FlushSubprocedurePool", e);<a name="line.270"></a>
+<span class="sourceLineNo">271</span> throw
(ForeignException)e.getCause();<a name="line.271"></a>
+<span class="sourceLineNo">272</span> } else if (cause instanceof
DroppedSnapshotException) {<a name="line.272"></a>
+<span class="sourceLineNo">273</span> // we have to abort the region
server according to contract of flush<a name="line.273"></a>
+<span class="sourceLineNo">274</span> abortable.abort("Received
DroppedSnapshotException, aborting", cause);<a name="line.274"></a>
+<span class="sourceLineNo">275</span> }<a name="line.275"></a>
+<span class="sourceLineNo">276</span> LOG.warn("Got Exception in
FlushSubprocedurePool", e);<a name="line.276"></a>
+<span class="sourceLineNo">277</span> throw new ForeignException(name,
e.getCause());<a name="line.277"></a>
+<span class="sourceLineNo">278</span> } finally {<a name="line.278"></a>
+<span class="sourceLineNo">279</span> cancelTasks();<a
name="line.279"></a>
+<span class="sourceLineNo">280</span> }<a name="line.280"></a>
+<span class="sourceLineNo">281</span> return false;<a name="line.281"></a>
+<span class="sourceLineNo">282</span> }<a name="line.282"></a>
+<span class="sourceLineNo">283</span><a name="line.283"></a>
+<span class="sourceLineNo">284</span> /**<a name="line.284"></a>
+<span class="sourceLineNo">285</span> * This attempts to cancel out all
pending and in progress tasks. Does not interrupt the running<a
name="line.285"></a>
+<span class="sourceLineNo">286</span> * tasks itself. An ongoing
HRegion.flush() should not be interrupted (see HBASE-13877).<a
name="line.286"></a>
+<span class="sourceLineNo">287</span> * @throws InterruptedException<a
name="line.287"></a>
+<span class="sourceLineNo">288</span> */<a name="line.288"></a>
+<span class="sourceLineNo">289</span> void cancelTasks() throws
InterruptedException {<a name="line.289"></a>
+<span class="sourceLineNo">290</span>
Collection<Future<Void>> tasks = futures;<a name="line.290"></a>
+<span class="sourceLineNo">291</span> LOG.debug("cancelling " +
tasks.size() + " flush region tasks " + name);<a name="line.291"></a>
+<span class="sourceLineNo">292</span> for (Future<Void> f: tasks)
{<a name="line.292"></a>
+<span class="sourceLineNo">293</span> f.cancel(false);<a
name="line.293"></a>
+<span class="sourceLineNo">294</span> }<a name="line.294"></a>
+<span class="sourceLineNo">295</span><a name="line.295"></a>
+<span class="sourceLineNo">296</span> // evict remaining tasks and
futures from taskPool.<a name="line.296"></a>
+<span class="sourceLineNo">297</span> futures.clear();<a
name="line.297"></a>
+<span class="sourceLineNo">298</span> while (taskPool.poll() != null)
{}<a name="line.298"></a>
+<span class="sourceLineNo">299</span> stop();<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> /**<a name="line.302"></a>
+<span class="sourceLineNo">303</span> * Gracefully shutdown the thread
pool. An ongoing HRegion.flush() should not be<a name="line.303"></a>
+<span class="sourceLineNo">304</span> * interrupted (see HBASE-13877)<a
name="line.304"></a>
+<span class="sourceLineNo">305</span> */<a name="line.305"></a>
+<span class="sourceLineNo">306</span> void stop() {<a name="line.306"></a>
+<span class="sourceLineNo">307</span> if (this.stopped) return;<a
name="line.307"></a>
+<span class="sourceLineNo">308</span><a name="line.308"></a>
+<span class="sourceLineNo">309</span> this.stopped = true;<a
name="line.309"></a>
+<span class="sourceLineNo">310</span> this.executor.shutdown();<a
name="line.310"></a>
+<span class="sourceLineNo">311</span> }<a name="line.311"></a>
+<span class="sourceLineNo">312</span> }<a name="line.312"></a>
+<span class="sourceLineNo">313</span><a name="line.313"></a>
+<span class="sourceLineNo">314</span> /**<a name="line.314"></a>
+<span class="sourceLineNo">315</span> * Initialize this region server flush
procedure manager<a name="line.315"></a>
+<span class="sourceLineNo">316</span> * Uses a zookeeper based member
controller.<a name="line.316"></a>
+<span class="sourceLineNo">317</span> * @param rss region server<a
name="line.317"></a>
+<span class="sourceLineNo">318</span> * @throws KeeperException if the
zookeeper cannot be reached<a name="line.318"></a>
+<span class="sourceLineNo">319</span> */<a name="line.319"></a>
+<span class="sourceLineNo">320</span> @Override<a name="line.320"></a>
+<span class="sourceLineNo">321</span> public void
initialize(RegionServerServices rss) throws KeeperException {<a
name="line.321"></a>
+<span class="sourceLineNo">322</span> this.rss = rss;<a name="line.322"></a>
+<span class="sourceLineNo">323</span> ZooKeeperWatcher zkw =
rss.getZooKeeper();<a name="line.323"></a>
+<span class="sourceLineNo">324</span> this.memberRpcs = new
ZKProcedureMemberRpcs(zkw,<a name="line.324"></a>
+<span class="sourceLineNo">325</span>
MasterFlushTableProcedureManager.FLUSH_TABLE_PROCEDURE_SIGNATURE);<a
name="line.325"></a>
+<span class="sourceLineNo">326</span><a name="line.326"></a>
+<span class="sourceLineNo">327</span> Configuration conf =
rss.getConfiguration();<a name="line.327"></a>
+<span class="sourceLineNo">328</span> long keepAlive =
conf.getLong(FLUSH_TIMEOUT_MILLIS_KEY, FLUSH_TIMEOUT_MILLIS_DEFAULT);<a
name="line.328"></a>
+<span class="sourceLineNo">329</span> int opThreads =
conf.getInt(FLUSH_REQUEST_THREADS_KEY, FLUSH_REQUEST_THREADS_DEFAULT);<a
name="line.329"></a>
+<span class="sourceLineNo">330</span><a name="line.330"></a>
+<span class="sourceLineNo">331</span> // create the actual flush table
procedure member<a name="line.331"></a>
+<span class="sourceLineNo">332</span> ThreadPoolExecutor pool =
ProcedureMember.defaultPool(rss.getServerName().toString(),<a
name="line.332"></a>
+<span class="sourceLineNo">333</span> opThreads, keepAlive);<a
name="line.333"></a>
+<span class="sourceLineNo">334</span> this.member = new
ProcedureMember(memberRpcs, pool, new FlushTableSubprocedureBuilder());<a
name="line.334"></a>
+<span class="sourceLineNo">335</span> }<a name="line.335"></a>
+<span class="sourceLineNo">336</span><a name="line.336"></a>
+<span class="sourceLineNo">337</span> @Override<a name="line.337"></a>
+<span class="sourceLineNo">338</span> public String getProcedureSignature()
{<a name="line.338"></a>
+<span class="sourceLineNo">339</span> return
MasterFlushTableProcedureManager.FLUSH_TABLE_PROCEDURE_SIGNATURE;<a
name="line.339"></a>
+<span class="sourceLineNo">340</span> }<a name="line.340"></a>
+<span class="sourceLineNo">341</span><a name="line.341"></a>
+<span class="sourceLineNo">342</span>}<a name="line.342"></a>
