http://git-wip-us.apache.org/repos/asf/hbase-site/blob/48bd3915/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.html b/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.html index 5378749..69b3737 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.html @@ -34,13 +34,13 @@ <span class="sourceLineNo">026</span><a name="line.26"></a> <span class="sourceLineNo">027</span>import org.apache.commons.logging.Log;<a name="line.27"></a> <span class="sourceLineNo">028</span>import org.apache.commons.logging.LogFactory;<a name="line.28"></a> -<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.29"></a> -<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.30"></a> -<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.util.RetryCounter;<a name="line.31"></a> -<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.util.RetryCounterFactory;<a name="line.32"></a> -<span class="sourceLineNo">033</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.33"></a> -<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.trace.TraceUtil;<a name="line.34"></a> -<span class="sourceLineNo">035</span>import org.apache.htrace.core.TraceScope;<a name="line.35"></a> +<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.trace.TraceUtil;<a name="line.29"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.30"></a> +<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.31"></a> +<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.util.RetryCounter;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.util.RetryCounterFactory;<a name="line.33"></a> +<span class="sourceLineNo">034</span>import org.apache.htrace.core.TraceScope;<a name="line.34"></a> +<span class="sourceLineNo">035</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.35"></a> <span class="sourceLineNo">036</span>import org.apache.zookeeper.AsyncCallback;<a name="line.36"></a> <span class="sourceLineNo">037</span>import org.apache.zookeeper.CreateMode;<a name="line.37"></a> <span class="sourceLineNo">038</span>import org.apache.zookeeper.KeeperException;<a name="line.38"></a> @@ -121,701 +121,727 @@ <span class="sourceLineNo">113</span> this.sessionTimeout = sessionTimeout;<a name="line.113"></a> <span class="sourceLineNo">114</span> this.quorumServers = quorumServers;<a name="line.114"></a> <span class="sourceLineNo">115</span> this.metrics = new ZKMetrics();<a name="line.115"></a> -<span class="sourceLineNo">116</span> try {checkZk();} catch (Exception x) {/* ignore */}<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> * Try to create a ZooKeeper connection. Turns any exception encountered into a<a name="line.120"></a> -<span class="sourceLineNo">121</span> * KeeperException.OperationTimeoutException so it can retried.<a name="line.121"></a> -<span class="sourceLineNo">122</span> * @return The created ZooKeeper connection object<a name="line.122"></a> -<span class="sourceLineNo">123</span> * @throws KeeperException<a name="line.123"></a> -<span class="sourceLineNo">124</span> */<a name="line.124"></a> -<span class="sourceLineNo">125</span> protected synchronized ZooKeeper checkZk() throws KeeperException {<a name="line.125"></a> -<span class="sourceLineNo">126</span> if (this.zk == null) {<a name="line.126"></a> -<span class="sourceLineNo">127</span> try {<a name="line.127"></a> -<span class="sourceLineNo">128</span> this.zk = new ZooKeeper(quorumServers, sessionTimeout, watcher);<a name="line.128"></a> -<span class="sourceLineNo">129</span> } catch (IOException ex) {<a name="line.129"></a> -<span class="sourceLineNo">130</span> LOG.warn("Unable to create ZooKeeper Connection", ex);<a name="line.130"></a> -<span class="sourceLineNo">131</span> throw new KeeperException.OperationTimeoutException();<a name="line.131"></a> -<span class="sourceLineNo">132</span> }<a name="line.132"></a> -<span class="sourceLineNo">133</span> }<a name="line.133"></a> -<span class="sourceLineNo">134</span> return zk;<a name="line.134"></a> -<span class="sourceLineNo">135</span> }<a name="line.135"></a> -<span class="sourceLineNo">136</span><a name="line.136"></a> -<span class="sourceLineNo">137</span> public synchronized void reconnectAfterExpiration()<a name="line.137"></a> -<span class="sourceLineNo">138</span> throws IOException, KeeperException, InterruptedException {<a name="line.138"></a> -<span class="sourceLineNo">139</span> if (zk != null) {<a name="line.139"></a> -<span class="sourceLineNo">140</span> LOG.info("Closing dead ZooKeeper connection, session" +<a name="line.140"></a> -<span class="sourceLineNo">141</span> " was: 0x"+Long.toHexString(zk.getSessionId()));<a name="line.141"></a> -<span class="sourceLineNo">142</span> zk.close();<a name="line.142"></a> -<span class="sourceLineNo">143</span> // reset the ZooKeeper connection<a name="line.143"></a> -<span class="sourceLineNo">144</span> zk = null;<a name="line.144"></a> -<span class="sourceLineNo">145</span> }<a name="line.145"></a> -<span class="sourceLineNo">146</span> checkZk();<a name="line.146"></a> -<span class="sourceLineNo">147</span> LOG.info("Recreated a ZooKeeper, session" +<a name="line.147"></a> -<span class="sourceLineNo">148</span> " is: 0x"+Long.toHexString(zk.getSessionId()));<a name="line.148"></a> -<span class="sourceLineNo">149</span> }<a name="line.149"></a> -<span class="sourceLineNo">150</span><a name="line.150"></a> -<span class="sourceLineNo">151</span> /**<a name="line.151"></a> -<span class="sourceLineNo">152</span> * delete is an idempotent operation. Retry before throwing exception.<a name="line.152"></a> -<span class="sourceLineNo">153</span> * This function will not throw NoNodeException if the path does not<a name="line.153"></a> -<span class="sourceLineNo">154</span> * exist.<a name="line.154"></a> -<span class="sourceLineNo">155</span> */<a name="line.155"></a> -<span class="sourceLineNo">156</span> public void delete(String path, int version) throws InterruptedException, KeeperException {<a name="line.156"></a> -<span class="sourceLineNo">157</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.delete")) {<a name="line.157"></a> -<span class="sourceLineNo">158</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.158"></a> -<span class="sourceLineNo">159</span> boolean isRetry = false; // False for first attempt, true for all retries.<a name="line.159"></a> -<span class="sourceLineNo">160</span> while (true) {<a name="line.160"></a> -<span class="sourceLineNo">161</span> try {<a name="line.161"></a> -<span class="sourceLineNo">162</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.162"></a> -<span class="sourceLineNo">163</span> checkZk().delete(path, version);<a name="line.163"></a> -<span class="sourceLineNo">164</span> this.metrics.registerWriteOperationLatency(Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.164"></a> -<span class="sourceLineNo">165</span> return;<a name="line.165"></a> -<span class="sourceLineNo">166</span> } catch (KeeperException e) {<a name="line.166"></a> -<span class="sourceLineNo">167</span> this.metrics.registerFailedZKCall();<a name="line.167"></a> -<span class="sourceLineNo">168</span> switch (e.code()) {<a name="line.168"></a> -<span class="sourceLineNo">169</span> case NONODE:<a name="line.169"></a> -<span class="sourceLineNo">170</span> if (isRetry) {<a name="line.170"></a> -<span class="sourceLineNo">171</span> LOG.debug("Node " + path + " already deleted. Assuming a " +<a name="line.171"></a> -<span class="sourceLineNo">172</span> "previous attempt succeeded.");<a name="line.172"></a> -<span class="sourceLineNo">173</span> return;<a name="line.173"></a> -<span class="sourceLineNo">174</span> }<a name="line.174"></a> -<span class="sourceLineNo">175</span> LOG.debug("Node " + path + " already deleted, retry=" + isRetry);<a name="line.175"></a> -<span class="sourceLineNo">176</span> throw e;<a name="line.176"></a> -<span class="sourceLineNo">177</span><a name="line.177"></a> -<span class="sourceLineNo">178</span> case CONNECTIONLOSS:<a name="line.178"></a> -<span class="sourceLineNo">179</span> this.metrics.registerConnectionLossException();<a name="line.179"></a> -<span class="sourceLineNo">180</span> retryOrThrow(retryCounter, e, "delete");<a name="line.180"></a> -<span class="sourceLineNo">181</span> break;<a name="line.181"></a> -<span class="sourceLineNo">182</span> case OPERATIONTIMEOUT:<a name="line.182"></a> -<span class="sourceLineNo">183</span> this.metrics.registerOperationTimeoutException();<a name="line.183"></a> -<span class="sourceLineNo">184</span> retryOrThrow(retryCounter, e, "delete");<a name="line.184"></a> -<span class="sourceLineNo">185</span> break;<a name="line.185"></a> -<span class="sourceLineNo">186</span><a name="line.186"></a> -<span class="sourceLineNo">187</span> default:<a name="line.187"></a> -<span class="sourceLineNo">188</span> throw e;<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> retryCounter.sleepUntilNextRetry();<a name="line.191"></a> -<span class="sourceLineNo">192</span> isRetry = true;<a name="line.192"></a> -<span class="sourceLineNo">193</span> }<a name="line.193"></a> -<span class="sourceLineNo">194</span> }<a name="line.194"></a> -<span class="sourceLineNo">195</span> }<a name="line.195"></a> -<span class="sourceLineNo">196</span><a name="line.196"></a> -<span class="sourceLineNo">197</span> /**<a name="line.197"></a> -<span class="sourceLineNo">198</span> * exists is an idempotent operation. Retry before throwing exception<a name="line.198"></a> -<span class="sourceLineNo">199</span> * @return A Stat instance<a name="line.199"></a> -<span class="sourceLineNo">200</span> */<a name="line.200"></a> -<span class="sourceLineNo">201</span> public Stat exists(String path, Watcher watcher) throws KeeperException, InterruptedException {<a name="line.201"></a> -<span class="sourceLineNo">202</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.exists")) {<a name="line.202"></a> -<span class="sourceLineNo">203</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.203"></a> -<span class="sourceLineNo">204</span> while (true) {<a name="line.204"></a> -<span class="sourceLineNo">205</span> try {<a name="line.205"></a> -<span class="sourceLineNo">206</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.206"></a> -<span class="sourceLineNo">207</span> Stat nodeStat = checkZk().exists(path, watcher);<a name="line.207"></a> -<span class="sourceLineNo">208</span> this.metrics.registerReadOperationLatency(Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.208"></a> -<span class="sourceLineNo">209</span> return nodeStat;<a name="line.209"></a> -<span class="sourceLineNo">210</span> } catch (KeeperException e) {<a name="line.210"></a> -<span class="sourceLineNo">211</span> this.metrics.registerFailedZKCall();<a name="line.211"></a> -<span class="sourceLineNo">212</span> switch (e.code()) {<a name="line.212"></a> -<span class="sourceLineNo">213</span> case CONNECTIONLOSS:<a name="line.213"></a> -<span class="sourceLineNo">214</span> this.metrics.registerConnectionLossException();<a name="line.214"></a> -<span class="sourceLineNo">215</span> retryOrThrow(retryCounter, e, "exists");<a name="line.215"></a> -<span class="sourceLineNo">216</span> break;<a name="line.216"></a> -<span class="sourceLineNo">217</span> case OPERATIONTIMEOUT:<a name="line.217"></a> -<span class="sourceLineNo">218</span> this.metrics.registerOperationTimeoutException();<a name="line.218"></a> -<span class="sourceLineNo">219</span> retryOrThrow(retryCounter, e, "exists");<a name="line.219"></a> -<span class="sourceLineNo">220</span> break;<a name="line.220"></a> -<span class="sourceLineNo">221</span><a name="line.221"></a> -<span class="sourceLineNo">222</span> default:<a name="line.222"></a> -<span class="sourceLineNo">223</span> throw e;<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> retryCounter.sleepUntilNextRetry();<a name="line.226"></a> -<span class="sourceLineNo">227</span> }<a name="line.227"></a> -<span class="sourceLineNo">228</span> }<a name="line.228"></a> -<span class="sourceLineNo">229</span> }<a name="line.229"></a> -<span class="sourceLineNo">230</span><a name="line.230"></a> -<span class="sourceLineNo">231</span> /**<a name="line.231"></a> -<span class="sourceLineNo">232</span> * exists is an idempotent operation. Retry before throwing exception<a name="line.232"></a> -<span class="sourceLineNo">233</span> * @return A Stat instance<a name="line.233"></a> -<span class="sourceLineNo">234</span> */<a name="line.234"></a> -<span class="sourceLineNo">235</span> public Stat exists(String path, boolean watch) throws KeeperException, InterruptedException {<a name="line.235"></a> -<span class="sourceLineNo">236</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.exists")) {<a name="line.236"></a> -<span class="sourceLineNo">237</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.237"></a> -<span class="sourceLineNo">238</span> while (true) {<a name="line.238"></a> -<span class="sourceLineNo">239</span> try {<a name="line.239"></a> -<span class="sourceLineNo">240</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.240"></a> -<span class="sourceLineNo">241</span> Stat nodeStat = checkZk().exists(path, watch);<a name="line.241"></a> -<span class="sourceLineNo">242</span> this.metrics.registerReadOperationLatency(Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.242"></a> -<span class="sourceLineNo">243</span> return nodeStat;<a name="line.243"></a> -<span class="sourceLineNo">244</span> } catch (KeeperException e) {<a name="line.244"></a> -<span class="sourceLineNo">245</span> this.metrics.registerFailedZKCall();<a name="line.245"></a> -<span class="sourceLineNo">246</span> switch (e.code()) {<a name="line.246"></a> -<span class="sourceLineNo">247</span> case CONNECTIONLOSS:<a name="line.247"></a> -<span class="sourceLineNo">248</span> this.metrics.registerConnectionLossException();<a name="line.248"></a> -<span class="sourceLineNo">249</span> retryOrThrow(retryCounter, e, "exists");<a name="line.249"></a> -<span class="sourceLineNo">250</span> break;<a name="line.250"></a> -<span class="sourceLineNo">251</span> case OPERATIONTIMEOUT:<a name="line.251"></a> -<span class="sourceLineNo">252</span> this.metrics.registerOperationTimeoutException();<a name="line.252"></a> -<span class="sourceLineNo">253</span> retryOrThrow(retryCounter, e, "exists");<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> default:<a name="line.256"></a> -<span class="sourceLineNo">257</span> throw e;<a name="line.257"></a> -<span class="sourceLineNo">258</span> }<a name="line.258"></a> -<span class="sourceLineNo">259</span> }<a name="line.259"></a> -<span class="sourceLineNo">260</span> retryCounter.sleepUntilNextRetry();<a name="line.260"></a> -<span class="sourceLineNo">261</span> }<a name="line.261"></a> -<span class="sourceLineNo">262</span> }<a name="line.262"></a> -<span class="sourceLineNo">263</span> }<a name="line.263"></a> -<span class="sourceLineNo">264</span><a name="line.264"></a> -<span class="sourceLineNo">265</span> private void retryOrThrow(RetryCounter retryCounter, KeeperException e,<a name="line.265"></a> -<span class="sourceLineNo">266</span> String opName) throws KeeperException {<a name="line.266"></a> -<span class="sourceLineNo">267</span> if (!retryCounter.shouldRetry()) {<a name="line.267"></a> -<span class="sourceLineNo">268</span> LOG.error("ZooKeeper " + opName + " failed after "<a name="line.268"></a> -<span class="sourceLineNo">269</span> + retryCounter.getMaxAttempts() + " attempts");<a name="line.269"></a> -<span class="sourceLineNo">270</span> throw e;<a name="line.270"></a> -<span class="sourceLineNo">271</span> }<a name="line.271"></a> -<span class="sourceLineNo">272</span> LOG.debug("Retry, connectivity issue (JVM Pause?); quorum=" + quorumServers + "," +<a name="line.272"></a> -<span class="sourceLineNo">273</span> "exception=" + e);<a name="line.273"></a> -<span class="sourceLineNo">274</span> }<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">277</span> * getChildren is an idempotent operation. Retry before throwing exception<a name="line.277"></a> -<span class="sourceLineNo">278</span> * @return List of children znodes<a name="line.278"></a> -<span class="sourceLineNo">279</span> */<a name="line.279"></a> -<span class="sourceLineNo">280</span> public List<String> getChildren(String path, Watcher watcher)<a name="line.280"></a> -<span class="sourceLineNo">281</span> throws KeeperException, InterruptedException {<a name="line.281"></a> -<span class="sourceLineNo">282</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.getChildren")) {<a name="line.282"></a> -<span class="sourceLineNo">283</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.283"></a> -<span class="sourceLineNo">284</span> while (true) {<a name="line.284"></a> -<span class="sourceLineNo">285</span> try {<a name="line.285"></a> -<span class="sourceLineNo">286</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.286"></a> -<span class="sourceLineNo">287</span> List<String> children = checkZk().getChildren(path, watcher);<a name="line.287"></a> -<span class="sourceLineNo">288</span> this.metrics.registerReadOperationLatency(Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.288"></a> -<span class="sourceLineNo">289</span> return children;<a name="line.289"></a> -<span class="sourceLineNo">290</span> } catch (KeeperException e) {<a name="line.290"></a> -<span class="sourceLineNo">291</span> this.metrics.registerFailedZKCall();<a name="line.291"></a> -<span class="sourceLineNo">292</span> switch (e.code()) {<a name="line.292"></a> -<span class="sourceLineNo">293</span> case CONNECTIONLOSS:<a name="line.293"></a> -<span class="sourceLineNo">294</span> this.metrics.registerConnectionLossException();<a name="line.294"></a> -<span class="sourceLineNo">295</span> retryOrThrow(retryCounter, e, "getChildren");<a name="line.295"></a> -<span class="sourceLineNo">296</span> break;<a name="line.296"></a> -<span class="sourceLineNo">297</span> case OPERATIONTIMEOUT:<a name="line.297"></a> -<span class="sourceLineNo">298</span> this.metrics.registerOperationTimeoutException();<a name="line.298"></a> -<span class="sourceLineNo">299</span> retryOrThrow(retryCounter, e, "getChildren");<a name="line.299"></a> -<span class="sourceLineNo">300</span> break;<a name="line.300"></a> -<span class="sourceLineNo">301</span><a name="line.301"></a> -<span class="sourceLineNo">302</span> default:<a name="line.302"></a> -<span class="sourceLineNo">303</span> throw e;<a name="line.303"></a> -<span class="sourceLineNo">304</span> }<a name="line.304"></a> -<span class="sourceLineNo">305</span> }<a name="line.305"></a> -<span class="sourceLineNo">306</span> retryCounter.sleepUntilNextRetry();<a name="line.306"></a> -<span class="sourceLineNo">307</span> }<a name="line.307"></a> -<span class="sourceLineNo">308</span> }<a name="line.308"></a> -<span class="sourceLineNo">309</span> }<a name="line.309"></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> checkZk();<a name="line.118"></a> +<span class="sourceLineNo">119</span> } catch (Exception x) {<a name="line.119"></a> +<span class="sourceLineNo">120</span> /* ignore */<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> * Try to create a ZooKeeper connection. Turns any exception encountered into a<a name="line.125"></a> +<span class="sourceLineNo">126</span> * KeeperException.OperationTimeoutException so it can retried.<a name="line.126"></a> +<span class="sourceLineNo">127</span> * @return The created ZooKeeper connection object<a name="line.127"></a> +<span class="sourceLineNo">128</span> * @throws KeeperException if a ZooKeeper operation fails<a name="line.128"></a> +<span class="sourceLineNo">129</span> */<a name="line.129"></a> +<span class="sourceLineNo">130</span> protected synchronized ZooKeeper checkZk() throws KeeperException {<a name="line.130"></a> +<span class="sourceLineNo">131</span> if (this.zk == null) {<a name="line.131"></a> +<span class="sourceLineNo">132</span> try {<a name="line.132"></a> +<span class="sourceLineNo">133</span> this.zk = new ZooKeeper(quorumServers, sessionTimeout, watcher);<a name="line.133"></a> +<span class="sourceLineNo">134</span> } catch (IOException ex) {<a name="line.134"></a> +<span class="sourceLineNo">135</span> LOG.warn("Unable to create ZooKeeper Connection", ex);<a name="line.135"></a> +<span class="sourceLineNo">136</span> throw new KeeperException.OperationTimeoutException();<a name="line.136"></a> +<span class="sourceLineNo">137</span> }<a name="line.137"></a> +<span class="sourceLineNo">138</span> }<a name="line.138"></a> +<span class="sourceLineNo">139</span> return zk;<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> public synchronized void reconnectAfterExpiration()<a name="line.142"></a> +<span class="sourceLineNo">143</span> throws IOException, KeeperException, InterruptedException {<a name="line.143"></a> +<span class="sourceLineNo">144</span> if (zk != null) {<a name="line.144"></a> +<span class="sourceLineNo">145</span> LOG.info("Closing dead ZooKeeper connection, session" +<a name="line.145"></a> +<span class="sourceLineNo">146</span> " was: 0x"+Long.toHexString(zk.getSessionId()));<a name="line.146"></a> +<span class="sourceLineNo">147</span> zk.close();<a name="line.147"></a> +<span class="sourceLineNo">148</span> // reset the ZooKeeper connection<a name="line.148"></a> +<span class="sourceLineNo">149</span> zk = null;<a name="line.149"></a> +<span class="sourceLineNo">150</span> }<a name="line.150"></a> +<span class="sourceLineNo">151</span> checkZk();<a name="line.151"></a> +<span class="sourceLineNo">152</span> LOG.info("Recreated a ZooKeeper, session" +<a name="line.152"></a> +<span class="sourceLineNo">153</span> " is: 0x"+Long.toHexString(zk.getSessionId()));<a name="line.153"></a> +<span class="sourceLineNo">154</span> }<a name="line.154"></a> +<span class="sourceLineNo">155</span><a name="line.155"></a> +<span class="sourceLineNo">156</span> /**<a name="line.156"></a> +<span class="sourceLineNo">157</span> * delete is an idempotent operation. Retry before throwing exception.<a name="line.157"></a> +<span class="sourceLineNo">158</span> * This function will not throw NoNodeException if the path does not<a name="line.158"></a> +<span class="sourceLineNo">159</span> * exist.<a name="line.159"></a> +<span class="sourceLineNo">160</span> */<a name="line.160"></a> +<span class="sourceLineNo">161</span> public void delete(String path, int version) throws InterruptedException, KeeperException {<a name="line.161"></a> +<span class="sourceLineNo">162</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.delete")) {<a name="line.162"></a> +<span class="sourceLineNo">163</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.163"></a> +<span class="sourceLineNo">164</span> boolean isRetry = false; // False for first attempt, true for all retries.<a name="line.164"></a> +<span class="sourceLineNo">165</span> while (true) {<a name="line.165"></a> +<span class="sourceLineNo">166</span> try {<a name="line.166"></a> +<span class="sourceLineNo">167</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.167"></a> +<span class="sourceLineNo">168</span> checkZk().delete(path, version);<a name="line.168"></a> +<span class="sourceLineNo">169</span> this.metrics.registerWriteOperationLatency(<a name="line.169"></a> +<span class="sourceLineNo">170</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.170"></a> +<span class="sourceLineNo">171</span> return;<a name="line.171"></a> +<span class="sourceLineNo">172</span> } catch (KeeperException e) {<a name="line.172"></a> +<span class="sourceLineNo">173</span> this.metrics.registerFailedZKCall();<a name="line.173"></a> +<span class="sourceLineNo">174</span> switch (e.code()) {<a name="line.174"></a> +<span class="sourceLineNo">175</span> case NONODE:<a name="line.175"></a> +<span class="sourceLineNo">176</span> if (isRetry) {<a name="line.176"></a> +<span class="sourceLineNo">177</span> LOG.debug("Node " + path + " already deleted. Assuming a " +<a name="line.177"></a> +<span class="sourceLineNo">178</span> "previous attempt succeeded.");<a name="line.178"></a> +<span class="sourceLineNo">179</span> return;<a name="line.179"></a> +<span class="sourceLineNo">180</span> }<a name="line.180"></a> +<span class="sourceLineNo">181</span> LOG.debug("Node " + path + " already deleted, retry=" + isRetry);<a name="line.181"></a> +<span class="sourceLineNo">182</span> throw e;<a name="line.182"></a> +<span class="sourceLineNo">183</span><a name="line.183"></a> +<span class="sourceLineNo">184</span> case CONNECTIONLOSS:<a name="line.184"></a> +<span class="sourceLineNo">185</span> this.metrics.registerConnectionLossException();<a name="line.185"></a> +<span class="sourceLineNo">186</span> retryOrThrow(retryCounter, e, "delete");<a name="line.186"></a> +<span class="sourceLineNo">187</span> break;<a name="line.187"></a> +<span class="sourceLineNo">188</span> case OPERATIONTIMEOUT:<a name="line.188"></a> +<span class="sourceLineNo">189</span> this.metrics.registerOperationTimeoutException();<a name="line.189"></a> +<span class="sourceLineNo">190</span> retryOrThrow(retryCounter, e, "delete");<a name="line.190"></a> +<span class="sourceLineNo">191</span> break;<a name="line.191"></a> +<span class="sourceLineNo">192</span><a name="line.192"></a> +<span class="sourceLineNo">193</span> default:<a name="line.193"></a> +<span class="sourceLineNo">194</span> throw e;<a name="line.194"></a> +<span class="sourceLineNo">195</span> }<a name="line.195"></a> +<span class="sourceLineNo">196</span> }<a name="line.196"></a> +<span class="sourceLineNo">197</span> retryCounter.sleepUntilNextRetry();<a name="line.197"></a> +<span class="sourceLineNo">198</span> isRetry = true;<a name="line.198"></a> +<span class="sourceLineNo">199</span> }<a name="line.199"></a> +<span class="sourceLineNo">200</span> }<a name="line.200"></a> +<span class="sourceLineNo">201</span> }<a name="line.201"></a> +<span class="sourceLineNo">202</span><a name="line.202"></a> +<span class="sourceLineNo">203</span> /**<a name="line.203"></a> +<span class="sourceLineNo">204</span> * exists is an idempotent operation. Retry before throwing exception<a name="line.204"></a> +<span class="sourceLineNo">205</span> * @return A Stat instance<a name="line.205"></a> +<span class="sourceLineNo">206</span> */<a name="line.206"></a> +<span class="sourceLineNo">207</span> public Stat exists(String path, Watcher watcher) throws KeeperException, InterruptedException {<a name="line.207"></a> +<span class="sourceLineNo">208</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.exists")) {<a name="line.208"></a> +<span class="sourceLineNo">209</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.209"></a> +<span class="sourceLineNo">210</span> while (true) {<a name="line.210"></a> +<span class="sourceLineNo">211</span> try {<a name="line.211"></a> +<span class="sourceLineNo">212</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.212"></a> +<span class="sourceLineNo">213</span> Stat nodeStat = checkZk().exists(path, watcher);<a name="line.213"></a> +<span class="sourceLineNo">214</span> this.metrics.registerReadOperationLatency(<a name="line.214"></a> +<span class="sourceLineNo">215</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.215"></a> +<span class="sourceLineNo">216</span> return nodeStat;<a name="line.216"></a> +<span class="sourceLineNo">217</span> } catch (KeeperException e) {<a name="line.217"></a> +<span class="sourceLineNo">218</span> this.metrics.registerFailedZKCall();<a name="line.218"></a> +<span class="sourceLineNo">219</span> switch (e.code()) {<a name="line.219"></a> +<span class="sourceLineNo">220</span> case CONNECTIONLOSS:<a name="line.220"></a> +<span class="sourceLineNo">221</span> this.metrics.registerConnectionLossException();<a name="line.221"></a> +<span class="sourceLineNo">222</span> retryOrThrow(retryCounter, e, "exists");<a name="line.222"></a> +<span class="sourceLineNo">223</span> break;<a name="line.223"></a> +<span class="sourceLineNo">224</span> case OPERATIONTIMEOUT:<a name="line.224"></a> +<span class="sourceLineNo">225</span> this.metrics.registerOperationTimeoutException();<a name="line.225"></a> +<span class="sourceLineNo">226</span> retryOrThrow(retryCounter, e, "exists");<a name="line.226"></a> +<span class="sourceLineNo">227</span> break;<a name="line.227"></a> +<span class="sourceLineNo">228</span><a name="line.228"></a> +<span class="sourceLineNo">229</span> default:<a name="line.229"></a> +<span class="sourceLineNo">230</span> throw e;<a name="line.230"></a> +<span class="sourceLineNo">231</span> }<a name="line.231"></a> +<span class="sourceLineNo">232</span> }<a name="line.232"></a> +<span class="sourceLineNo">233</span> retryCounter.sleepUntilNextRetry();<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><a name="line.237"></a> +<span class="sourceLineNo">238</span> /**<a name="line.238"></a> +<span class="sourceLineNo">239</span> * exists is an idempotent operation. Retry before throwing exception<a name="line.239"></a> +<span class="sourceLineNo">240</span> * @return A Stat instance<a name="line.240"></a> +<span class="sourceLineNo">241</span> */<a name="line.241"></a> +<span class="sourceLineNo">242</span> public Stat exists(String path, boolean watch) throws KeeperException, InterruptedException {<a name="line.242"></a> +<span class="sourceLineNo">243</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.exists")) {<a name="line.243"></a> +<span class="sourceLineNo">244</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.244"></a> +<span class="sourceLineNo">245</span> while (true) {<a name="line.245"></a> +<span class="sourceLineNo">246</span> try {<a name="line.246"></a> +<span class="sourceLineNo">247</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.247"></a> +<span class="sourceLineNo">248</span> Stat nodeStat = checkZk().exists(path, watch);<a name="line.248"></a> +<span class="sourceLineNo">249</span> this.metrics.registerReadOperationLatency(<a name="line.249"></a> +<span class="sourceLineNo">250</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.250"></a> +<span class="sourceLineNo">251</span> return nodeStat;<a name="line.251"></a> +<span class="sourceLineNo">252</span> } catch (KeeperException e) {<a name="line.252"></a> +<span class="sourceLineNo">253</span> this.metrics.registerFailedZKCall();<a name="line.253"></a> +<span class="sourceLineNo">254</span> switch (e.code()) {<a name="line.254"></a> +<span class="sourceLineNo">255</span> case CONNECTIONLOSS:<a name="line.255"></a> +<span class="sourceLineNo">256</span> this.metrics.registerConnectionLossException();<a name="line.256"></a> +<span class="sourceLineNo">257</span> retryOrThrow(retryCounter, e, "exists");<a name="line.257"></a> +<span class="sourceLineNo">258</span> break;<a name="line.258"></a> +<span class="sourceLineNo">259</span> case OPERATIONTIMEOUT:<a name="line.259"></a> +<span class="sourceLineNo">260</span> this.metrics.registerOperationTimeoutException();<a name="line.260"></a> +<span class="sourceLineNo">261</span> retryOrThrow(retryCounter, e, "exists");<a name="line.261"></a> +<span class="sourceLineNo">262</span> break;<a name="line.262"></a> +<span class="sourceLineNo">263</span><a name="line.263"></a> +<span class="sourceLineNo">264</span> default:<a name="line.264"></a> +<span class="sourceLineNo">265</span> throw e;<a name="line.265"></a> +<span class="sourceLineNo">266</span> }<a name="line.266"></a> +<span class="sourceLineNo">267</span> }<a name="line.267"></a> +<span class="sourceLineNo">268</span> retryCounter.sleepUntilNextRetry();<a name="line.268"></a> +<span class="sourceLineNo">269</span> }<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><a name="line.272"></a> +<span class="sourceLineNo">273</span> private void retryOrThrow(RetryCounter retryCounter, KeeperException e,<a name="line.273"></a> +<span class="sourceLineNo">274</span> String opName) throws KeeperException {<a name="line.274"></a> +<span class="sourceLineNo">275</span> if (!retryCounter.shouldRetry()) {<a name="line.275"></a> +<span class="sourceLineNo">276</span> LOG.error("ZooKeeper " + opName + " failed after "<a name="line.276"></a> +<span class="sourceLineNo">277</span> + retryCounter.getMaxAttempts() + " attempts");<a name="line.277"></a> +<span class="sourceLineNo">278</span> throw e;<a name="line.278"></a> +<span class="sourceLineNo">279</span> }<a name="line.279"></a> +<span class="sourceLineNo">280</span> LOG.debug("Retry, connectivity issue (JVM Pause?); quorum=" + quorumServers + "," +<a name="line.280"></a> +<span class="sourceLineNo">281</span> "exception=" + e);<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> * getChildren is an idempotent operation. Retry before throwing exception<a name="line.285"></a> +<span class="sourceLineNo">286</span> * @return List of children znodes<a name="line.286"></a> +<span class="sourceLineNo">287</span> */<a name="line.287"></a> +<span class="sourceLineNo">288</span> public List<String> getChildren(String path, Watcher watcher)<a name="line.288"></a> +<span class="sourceLineNo">289</span> throws KeeperException, InterruptedException {<a name="line.289"></a> +<span class="sourceLineNo">290</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.getChildren")) {<a name="line.290"></a> +<span class="sourceLineNo">291</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.291"></a> +<span class="sourceLineNo">292</span> while (true) {<a name="line.292"></a> +<span class="sourceLineNo">293</span> try {<a name="line.293"></a> +<span class="sourceLineNo">294</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.294"></a> +<span class="sourceLineNo">295</span> List<String> children = checkZk().getChildren(path, watcher);<a name="line.295"></a> +<span class="sourceLineNo">296</span> this.metrics.registerReadOperationLatency(<a name="line.296"></a> +<span class="sourceLineNo">297</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.297"></a> +<span class="sourceLineNo">298</span> return children;<a name="line.298"></a> +<span class="sourceLineNo">299</span> } catch (KeeperException e) {<a name="line.299"></a> +<span class="sourceLineNo">300</span> this.metrics.registerFailedZKCall();<a name="line.300"></a> +<span class="sourceLineNo">301</span> switch (e.code()) {<a name="line.301"></a> +<span class="sourceLineNo">302</span> case CONNECTIONLOSS:<a name="line.302"></a> +<span class="sourceLineNo">303</span> this.metrics.registerConnectionLossException();<a name="line.303"></a> +<span class="sourceLineNo">304</span> retryOrThrow(retryCounter, e, "getChildren");<a name="line.304"></a> +<span class="sourceLineNo">305</span> break;<a name="line.305"></a> +<span class="sourceLineNo">306</span> case OPERATIONTIMEOUT:<a name="line.306"></a> +<span class="sourceLineNo">307</span> this.metrics.registerOperationTimeoutException();<a name="line.307"></a> +<span class="sourceLineNo">308</span> retryOrThrow(retryCounter, e, "getChildren");<a name="line.308"></a> +<span class="sourceLineNo">309</span> break;<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> * getChildren is an idempotent operation. Retry before throwing exception<a name="line.312"></a> -<span class="sourceLineNo">313</span> * @return List of children znodes<a name="line.313"></a> -<span class="sourceLineNo">314</span> */<a name="line.314"></a> -<span class="sourceLineNo">315</span> public List<String> getChildren(String path, boolean watch)<a name="line.315"></a> -<span class="sourceLineNo">316</span> throws KeeperException, InterruptedException {<a name="line.316"></a> -<span class="sourceLineNo">317</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.getChildren")) {<a name="line.317"></a> -<span class="sourceLineNo">318</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.318"></a> -<span class="sourceLineNo">319</span> while (true) {<a name="line.319"></a> -<span class="sourceLineNo">320</span> try {<a name="line.320"></a> -<span class="sourceLineNo">321</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.321"></a> -<span class="sourceLineNo">322</span> List<String> children = checkZk().getChildren(path, watch);<a name="line.322"></a> -<span class="sourceLineNo">323</span> this.metrics.registerReadOperationLatency(Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.323"></a> -<span class="sourceLineNo">324</span> return children;<a name="line.324"></a> -<span class="sourceLineNo">325</span> } catch (KeeperException e) {<a name="line.325"></a> -<span class="sourceLineNo">326</span> this.metrics.registerFailedZKCall();<a name="line.326"></a> -<span class="sourceLineNo">327</span> switch (e.code()) {<a name="line.327"></a> -<span class="sourceLineNo">328</span> case CONNECTIONLOSS:<a name="line.328"></a> -<span class="sourceLineNo">329</span> this.metrics.registerConnectionLossException();<a name="line.329"></a> -<span class="sourceLineNo">330</span> retryOrThrow(retryCounter, e, "getChildren");<a name="line.330"></a> -<span class="sourceLineNo">331</span> break;<a name="line.331"></a> -<span class="sourceLineNo">332</span> case OPERATIONTIMEOUT:<a name="line.332"></a> -<span class="sourceLineNo">333</span> this.metrics.registerOperationTimeoutException();<a name="line.333"></a> -<span class="sourceLineNo">334</span> retryOrThrow(retryCounter, e, "getChildren");<a name="line.334"></a> -<span class="sourceLineNo">335</span> break;<a name="line.335"></a> -<span class="sourceLineNo">336</span><a name="line.336"></a> -<span class="sourceLineNo">337</span> default:<a name="line.337"></a> -<span class="sourceLineNo">338</span> throw e;<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> retryCounter.sleepUntilNextRetry();<a name="line.341"></a> -<span class="sourceLineNo">342</span> }<a name="line.342"></a> -<span class="sourceLineNo">343</span> }<a name="line.343"></a> -<span class="sourceLineNo">344</span> }<a name="line.344"></a> -<span class="sourceLineNo">345</span><a name="line.345"></a> -<span class="sourceLineNo">346</span> /**<a name="line.346"></a> -<span class="sourceLineNo">347</span> * getData is an idempotent operation. Retry before throwing exception<a name="line.347"></a> -<span class="sourceLineNo">348</span> * @return Data<a name="line.348"></a> -<span class="sourceLineNo">349</span> */<a name="line.349"></a> -<span class="sourceLineNo">350</span> public byte[] getData(String path, Watcher watcher, Stat stat)<a name="line.350"></a> -<span class="sourceLineNo">351</span> throws KeeperException, InterruptedException {<a name="line.351"></a> -<span class="sourceLineNo">352</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.getData")) {<a name="line.352"></a> -<span class="sourceLineNo">353</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.353"></a> -<span class="sourceLineNo">354</span> while (true) {<a name="line.354"></a> -<span class="sourceLineNo">355</span> try {<a name="line.355"></a> -<span class="sourceLineNo">356</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.356"></a> -<span class="sourceLineNo">357</span> byte[] revData = checkZk().getData(path, watcher, stat);<a name="line.357"></a> -<span class="sourceLineNo">358</span> this.metrics.registerReadOperationLatency(Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.358"></a> -<span class="sourceLineNo">359</span> return ZKMetadata.removeMetaData(revData);<a name="line.359"></a> -<span class="sourceLineNo">360</span> } catch (KeeperException e) {<a name="line.360"></a> -<span class="sourceLineNo">361</span> this.metrics.registerFailedZKCall();<a name="line.361"></a> -<span class="sourceLineNo">362</span> switch (e.code()) {<a name="line.362"></a> -<span class="sourceLineNo">363</span> case CONNECTIONLOSS:<a name="line.363"></a> -<span class="sourceLineNo">364</span> this.metrics.registerConnectionLossException();<a name="line.364"></a> -<span class="sourceLineNo">365</span> retryOrThrow(retryCounter, e, "getData");<a name="line.365"></a> -<span class="sourceLineNo">366</span> break;<a name="line.366"></a> -<span class="sourceLineNo">367</span> case OPERATIONTIMEOUT:<a name="line.367"></a> -<span class="sourceLineNo">368</span> this.metrics.registerOperationTimeoutException();<a name="line.368"></a> -<span class="sourceLineNo">369</span> retryOrThrow(retryCounter, e, "getData");<a name="line.369"></a> -<span class="sourceLineNo">370</span> break;<a name="line.370"></a> -<span class="sourceLineNo">371</span><a name="line.371"></a> -<span class="sourceLineNo">372</span> default:<a name="line.372"></a> -<span class="sourceLineNo">373</span> throw e;<a name="line.373"></a> -<span class="sourceLineNo">374</span> }<a name="line.374"></a> -<span class="sourceLineNo">375</span> }<a name="line.375"></a> -<span class="sourceLineNo">376</span> retryCounter.sleepUntilNextRetry();<a name="line.376"></a> -<span class="sourceLineNo">377</span> }<a name="line.377"></a> -<span class="sourceLineNo">378</span> }<a name="line.378"></a> -<span class="sourceLineNo">379</span> }<a name="line.379"></a> -<span class="sourceLineNo">380</span><a name="line.380"></a> -<span class="sourceLineNo">381</span> /**<a name="line.381"></a> -<span class="sourceLineNo">382</span> * getData is an idempotent operation. Retry before throwing exception<a name="line.382"></a> -<span class="sourceLineNo">383</span> * @return Data<a name="line.383"></a> -<span class="sourceLineNo">384</span> */<a name="line.384"></a> -<span class="sourceLineNo">385</span> public byte[] getData(String path, boolean watch, Stat stat)<a name="line.385"></a> -<span class="sourceLineNo">386</span> throws KeeperException, InterruptedException {<a name="line.386"></a> -<span class="sourceLineNo">387</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.getData")) {<a name="line.387"></a> -<span class="sourceLineNo">388</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.388"></a> -<span class="sourceLineNo">389</span> while (true) {<a name="line.389"></a> -<span class="sourceLineNo">390</span> try {<a name="line.390"></a> -<span class="sourceLineNo">391</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.391"></a> -<span class="sourceLineNo">392</span> byte[] revData = checkZk().getData(path, watch, stat);<a name="line.392"></a> -<span class="sourceLineNo">393</span> this.metrics.registerReadOperationLatency(Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.393"></a> -<span class="sourceLineNo">394</span> return ZKMetadata.removeMetaData(revData);<a name="line.394"></a> -<span class="sourceLineNo">395</span> } catch (KeeperException e) {<a name="line.395"></a> -<span class="sourceLineNo">396</span> this.metrics.registerFailedZKCall();<a name="line.396"></a> -<span class="sourceLineNo">397</span> switch (e.code()) {<a name="line.397"></a> -<span class="sourceLineNo">398</span> case CONNECTIONLOSS:<a name="line.398"></a> -<span class="sourceLineNo">399</span> this.metrics.registerConnectionLossException();<a name="line.399"></a> -<span class="sourceLineNo">400</span> retryOrThrow(retryCounter, e, "getData");<a name="line.400"></a> -<span class="sourceLineNo">401</span> break;<a name="line.401"></a> -<span class="sourceLineNo">402</span> case OPERATIONTIMEOUT:<a name="line.402"></a> -<span class="sourceLineNo">403</span> this.metrics.registerOperationTimeoutException();<a name="line.403"></a> -<span class="sourceLineNo">404</span> retryOrThrow(retryCounter, e, "getData");<a name="line.404"></a> -<span class="sourceLineNo">405</span> break;<a name="line.405"></a> -<span class="sourceLineNo">406</span><a name="line.406"></a> -<span class="sourceLineNo">407</span> default:<a name="line.407"></a> -<span class="sourceLineNo">408</span> throw e;<a name="line.408"></a> -<span class="sourceLineNo">409</span> }<a name="line.409"></a> -<span class="sourceLineNo">410</span> }<a name="line.410"></a> -<span class="sourceLineNo">411</span> retryCounter.sleepUntilNextRetry();<a name="line.411"></a> -<span class="sourceLineNo">412</span> }<a name="line.412"></a> -<span class="sourceLineNo">413</span> }<a name="line.413"></a> -<span class="sourceLineNo">414</span> }<a name="line.414"></a> -<span class="sourceLineNo">415</span><a name="line.415"></a> -<span class="sourceLineNo">416</span> /**<a name="line.416"></a> -<span class="sourceLineNo">417</span> * setData is NOT an idempotent operation. Retry may cause BadVersion Exception<a name="line.417"></a> -<span class="sourceLineNo">418</span> * Adding an identifier field into the data to check whether<a name="line.418"></a> -<span class="sourceLineNo">419</span> * badversion is caused by the result of previous correctly setData<a name="line.419"></a> -<span class="sourceLineNo">420</span> * @return Stat instance<a name="line.420"></a> -<span class="sourceLineNo">421</span> */<a name="line.421"></a> -<span class="sourceLineNo">422</span> public Stat setData(String path, byte[] data, int version)<a name="line.422"></a> -<span class="sourceLineNo">423</span> throws KeeperException, InterruptedException {<a name="line.423"></a> -<span class="sourceLineNo">424</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.setData")) {<a name="line.424"></a> -<span class="sourceLineNo">425</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.425"></a> -<span class="sourceLineNo">426</span> byte[] newData = ZKMetadata.appendMetaData(id, data);<a name="line.426"></a> -<span class="sourceLineNo">427</span> boolean isRetry = false;<a name="line.427"></a> -<span class="sourceLineNo">428</span> long startTime;<a name="line.428"></a> -<span class="sourceLineNo">429</span> while (true) {<a name="line.429"></a> -<span class="sourceLineNo">430</span> try {<a name="line.430"></a> -<span class="sourceLineNo">431</span> startTime = EnvironmentEdgeManager.currentTime();<a name="line.431"></a> -<span class="sourceLineNo">432</span> Stat nodeStat = checkZk().setData(path, newData, version);<a name="line.432"></a> -<span class="sourceLineNo">433</span> this.metrics.registerWriteOperationLatency(Math.min(EnvironmentEdgeManager.currentTime() - 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startTime, 1));<a name="line.453"></a> -<span class="sourceLineNo">454</span> if(Bytes.compareTo(revData, newData) == 0) {<a name="line.454"></a> -<span class="sourceLineNo">455</span> // the bad version is caused by previous successful setData<a name="line.455"></a> -<span class="sourceLineNo">456</span> return stat;<a name="line.456"></a> -<span class="sourceLineNo">457</span> }<a name="line.457"></a> -<span class="sourceLineNo">458</span> } catch(KeeperException keeperException){<a name="line.458"></a> -<span class="sourceLineNo">459</span> this.metrics.registerFailedZKCall();<a name="line.459"></a> -<span class="sourceLineNo">460</span> // the ZK is not reliable at this moment. just throwing exception<a name="line.460"></a> -<span class="sourceLineNo">461</span> throw keeperException;<a name="line.461"></a> -<span class="sourceLineNo">462</span> }<a name="line.462"></a> -<span class="sourceLineNo">463</span> }<a name="line.463"></a> -<span class="sourceLineNo">464</span> // throw other exceptions and verified bad version exceptions<a name="line.464"></a> -<span class="sourceLineNo">465</span> default:<a name="line.465"></a> -<span class="sourceLineNo">466</span> throw e;<a name="line.466"></a> -<span class="sourceLineNo">467</span> }<a name="line.467"></a> -<span class="sourceLineNo">468</span> }<a name="line.468"></a> -<span class="sourceLineNo">469</span> retryCounter.sleepUntilNextRetry();<a name="line.469"></a> -<span class="sourceLineNo">470</span> isRetry = true;<a name="line.470"></a> -<span class="sourceLineNo">471</span> }<a name="line.471"></a> -<span class="sourceLineNo">472</span> }<a name="line.472"></a> -<span class="sourceLineNo">473</span> }<a name="line.473"></a> -<span class="sourceLineNo">474</span><a name="line.474"></a> -<span class="sourceLineNo">475</span> /**<a name="line.475"></a> -<span class="sourceLineNo">476</span> * getAcl is an idempotent operation. 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Retry before throwing exception<a name="line.321"></a> +<span class="sourceLineNo">322</span> * @return List of children znodes<a name="line.322"></a> +<span class="sourceLineNo">323</span> */<a name="line.323"></a> +<span class="sourceLineNo">324</span> public List<String> getChildren(String path, boolean watch)<a name="line.324"></a> +<span class="sourceLineNo">325</span> throws KeeperException, InterruptedException {<a name="line.325"></a> +<span class="sourceLineNo">326</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.getChildren")) {<a name="line.326"></a> +<span class="sourceLineNo">327</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.327"></a> +<span class="sourceLineNo">328</span> while (true) {<a name="line.328"></a> +<span class="sourceLineNo">329</span> try {<a name="line.329"></a> +<span class="sourceLineNo">330</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.330"></a> +<span class="sourceLineNo">331</span> List<String> children = checkZk().getChildren(path, watch);<a name="line.331"></a> +<span class="sourceLineNo">332</span> this.metrics.registerReadOperationLatency(<a name="line.332"></a> +<span class="sourceLineNo">333</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.333"></a> +<span class="sourceLineNo">334</span> return children;<a name="line.334"></a> +<span class="sourceLineNo">335</span> } catch (KeeperException e) {<a name="line.335"></a> +<span class="sourceLineNo">336</span> this.metrics.registerFailedZKCall();<a name="line.336"></a> +<span class="sourceLineNo">337</span> switch (e.code()) {<a name="line.337"></a> +<span class="sourceLineNo">338</span> case CONNECTIONLOSS:<a name="line.338"></a> +<span class="sourceLineNo">339</span> this.metrics.registerConnectionLossException();<a name="line.339"></a> +<span class="sourceLineNo">340</span> retryOrThrow(retryCounter, e, "getChildren");<a name="line.340"></a> +<span class="sourceLineNo">341</span> break;<a name="line.341"></a> +<span class="sourceLineNo">342</span> case OPERATIONTIMEOUT:<a name="line.342"></a> +<span class="sourceLineNo">343</span> this.metrics.registerOperationTimeoutException();<a name="line.343"></a> +<span class="sourceLineNo">344</span> retryOrThrow(retryCounter, e, "getChildren");<a name="line.344"></a> +<span class="sourceLineNo">345</span> break;<a name="line.345"></a> +<span class="sourceLineNo">346</span><a name="line.346"></a> +<span class="sourceLineNo">347</span> default:<a name="line.347"></a> +<span class="sourceLineNo">348</span> throw e;<a name="line.348"></a> +<span class="sourceLineNo">349</span> }<a name="line.349"></a> +<span class="sourceLineNo">350</span> }<a name="line.350"></a> +<span class="sourceLineNo">351</span> retryCounter.sleepUntilNextRetry();<a name="line.351"></a> +<span class="sourceLineNo">352</span> }<a name="line.352"></a> +<span class="sourceLineNo">353</span> }<a name="line.353"></a> +<span class="sourceLineNo">354</span> }<a name="line.354"></a> +<span class="sourceLineNo">355</span><a name="line.355"></a> +<span class="sourceLineNo">356</span> /**<a name="line.356"></a> +<span class="sourceLineNo">357</span> * getData is an idempotent operation. Retry before throwing exception<a name="line.357"></a> +<span class="sourceLineNo">358</span> * @return Data<a name="line.358"></a> +<span class="sourceLineNo">359</span> */<a name="line.359"></a> +<span class="sourceLineNo">360</span> public byte[] getData(String path, Watcher watcher, Stat stat)<a name="line.360"></a> +<span class="sourceLineNo">361</span> throws KeeperException, InterruptedException {<a name="line.361"></a> +<span class="sourceLineNo">362</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.getData")) {<a name="line.362"></a> +<span class="sourceLineNo">363</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.363"></a> +<span class="sourceLineNo">364</span> while (true) {<a name="line.364"></a> +<span class="sourceLineNo">365</span> try {<a name="line.365"></a> +<span class="sourceLineNo">366</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.366"></a> +<span class="sourceLineNo">367</span> byte[] revData = checkZk().getData(path, watcher, stat);<a name="line.367"></a> +<span class="sourceLineNo">368</span> this.metrics.registerReadOperationLatency(<a name="line.368"></a> +<span class="sourceLineNo">369</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.369"></a> +<span class="sourceLineNo">370</span> return ZKMetadata.removeMetaData(revData);<a name="line.370"></a> +<span class="sourceLineNo">371</span> } catch (KeeperException e) {<a name="line.371"></a> +<span class="sourceLineNo">372</span> this.metrics.registerFailedZKCall();<a name="line.372"></a> +<span class="sourceLineNo">373</span> switch (e.code()) {<a name="line.373"></a> +<span class="sourceLineNo">374</span> case CONNECTIONLOSS:<a name="line.374"></a> +<span class="sourceLineNo">375</span> this.metrics.registerConnectionLossException();<a name="line.375"></a> +<span class="sourceLineNo">376</span> retryOrThrow(retryCounter, e, "getData");<a name="line.376"></a> +<span class="sourceLineNo">377</span> break;<a name="line.377"></a> +<span class="sourceLineNo">378</span> case OPERATIONTIMEOUT:<a name="line.378"></a> +<span class="sourceLineNo">379</span> this.metrics.registerOperationTimeoutException();<a name="line.379"></a> +<span class="sourceLineNo">380</span> retryOrThrow(retryCounter, e, "getData");<a name="line.380"></a> +<span class="sourceLineNo">381</span> break;<a name="line.381"></a> +<span class="sourceLineNo">382</span><a name="line.382"></a> +<span class="sourceLineNo">383</span> default:<a name="line.383"></a> +<span class="sourceLineNo">384</span> throw e;<a name="line.384"></a> +<span class="sourceLineNo">385</span> }<a name="line.385"></a> +<span class="sourceLineNo">386</span> }<a name="line.386"></a> +<span class="sourceLineNo">387</span> retryCounter.sleepUntilNextRetry();<a name="line.387"></a> +<span class="sourceLineNo">388</span> }<a name="line.388"></a> +<span class="sourceLineNo">389</span> }<a name="line.389"></a> +<span class="sourceLineNo">390</span> }<a name="line.390"></a> +<span class="sourceLineNo">391</span><a name="line.391"></a> +<span class="sourceLineNo">392</span> /**<a name="line.392"></a> +<span class="sourceLineNo">393</span> * getData is an idempotent operation. Retry before throwing exception<a name="line.393"></a> +<span class="sourceLineNo">394</span> * @return Data<a name="line.394"></a> +<span class="sourceLineNo">395</span> */<a name="line.395"></a> +<span class="sourceLineNo">396</span> public byte[] getData(String path, boolean watch, Stat stat)<a name="line.396"></a> +<span class="sourceLineNo">397</span> throws KeeperException, InterruptedException {<a name="line.397"></a> +<span class="sourceLineNo">398</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.getData")) {<a name="line.398"></a> +<span class="sourceLineNo">399</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.399"></a> +<span class="sourceLineNo">400</span> while (true) {<a name="line.400"></a> +<span class="sourceLineNo">401</span> try {<a name="line.401"></a> +<span class="sourceLineNo">402</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.402"></a> +<span class="sourceLineNo">403</span> byte[] revData = checkZk().getData(path, watch, stat);<a name="line.403"></a> +<span class="sourceLineNo">404</span> this.metrics.registerReadOperationLatency(<a name="line.404"></a> +<span class="sourceLineNo">405</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.405"></a> +<span class="sourceLineNo">406</span> return ZKMetadata.removeMetaData(revData);<a name="line.406"></a> +<span class="sourceLineNo">407</span> } catch (KeeperException e) {<a name="line.407"></a> +<span class="sourceLineNo">408</span> this.metrics.registerFailedZKCall();<a name="line.408"></a> +<span class="sourceLineNo">409</span> switch (e.code()) {<a name="line.409"></a> +<span class="sourceLineNo">410</span> case CONNECTIONLOSS:<a name="line.410"></a> +<span class="sourceLineNo">411</span> this.metrics.registerConnectionLossException();<a name="line.411"></a> +<span class="sourceLineNo">412</span> retryOrThrow(retryCounter, e, "getData");<a name="line.412"></a> +<span class="sourceLineNo">413</span> break;<a name="line.413"></a> +<span class="sourceLineNo">414</span> case OPERATIONTIMEOUT:<a name="line.414"></a> +<span class="sourceLineNo">415</span> this.metrics.registerOperationTimeoutException();<a name="line.415"></a> +<span class="sourceLineNo">416</span> retryOrThrow(retryCounter, e, "getData");<a name="line.416"></a> +<span class="sourceLineNo">417</span> break;<a name="line.417"></a> +<span class="sourceLineNo">418</span><a name="line.418"></a> +<span class="sourceLineNo">419</span> default:<a name="line.419"></a> +<span class="sourceLineNo">420</span> throw e;<a name="line.420"></a> +<span class="sourceLineNo">421</span> }<a name="line.421"></a> +<span class="sourceLineNo">422</span> }<a name="line.422"></a> +<span class="sourceLineNo">423</span> retryCounter.sleepUntilNextRetry();<a name="line.423"></a> +<span class="sourceLineNo">424</span> }<a name="line.424"></a> +<span class="sourceLineNo">425</span> }<a name="line.425"></a> +<span class="sourceLineNo">426</span> }<a name="line.426"></a> +<span class="sourceLineNo">427</span><a name="line.427"></a> +<span class="sourceLineNo">428</span> /**<a name="line.428"></a> +<span class="sourceLineNo">429</span> * setData is NOT an idempotent operation. Retry may cause BadVersion Exception<a name="line.429"></a> +<span class="sourceLineNo">430</span> * Adding an identifier field into the data to check whether<a name="line.430"></a> +<span class="sourceLineNo">431</span> * badversion is caused by the result of previous correctly setData<a name="line.431"></a> +<span class="sourceLineNo">432</span> * @return Stat instance<a name="line.432"></a> +<span class="sourceLineNo">433</span> */<a name="line.433"></a> +<span class="sourceLineNo">434</span> public Stat setData(String path, byte[] data, int version)<a name="line.434"></a> +<span class="sourceLineNo">435</span> throws KeeperException, InterruptedException {<a name="line.435"></a> +<span class="sourceLineNo">436</span> try (TraceScope scope = TraceUtil.createTrace("RecoverableZookeeper.setData")) {<a name="line.436"></a> +<span class="sourceLineNo">437</span> RetryCounter retryCounter = retryCounterFactory.create();<a name="line.437"></a> +<span class="sourceLineNo">438</span> byte[] newData = ZKMetadata.appendMetaData(id, data);<a name="line.438"></a> +<span class="sourceLineNo">439</span> boolean isRetry = false;<a name="line.439"></a> +<span class="sourceLineNo">440</span> long startTime;<a name="line.440"></a> +<span class="sourceLineNo">441</span> while (true) {<a name="line.441"></a> +<span class="sourceLineNo">442</span> try {<a name="line.442"></a> +<span class="sourceLineNo">443</span> startTime = EnvironmentEdgeManager.currentTime();<a name="line.443"></a> +<span class="sourceLineNo">444</span> Stat nodeStat = checkZk().setData(path, newData, version);<a name="line.444"></a> +<span class="sourceLineNo">445</span> this.metrics.registerWriteOperationLatency(<a name="line.445"></a> +<span class="sourceLineNo">446</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.446"></a> +<span class="sourceLineNo">447</span> return nodeStat;<a name="line.447"></a> +<span class="sourceLineNo">448</span> } catch (KeeperException e) {<a name="line.448"></a> +<span class="sourceLineNo">449</span> this.metrics.registerFailedZKCall();<a name="line.449"></a> +<span class="sourceLineNo">450</span> switch (e.code()) {<a name="line.450"></a> +<span class="sourceLineNo">451</span> case CONNECTIONLOSS:<a name="line.451"></a> +<span class="sourceLineNo">452</span> this.metrics.registerConnectionLossException();<a name="line.452"></a> +<span class="sourceLineNo">453</span> retryOrThrow(retryCounter, e, "setData");<a name="line.453"></a> +<span class="sourceLineNo">454</span> break;<a name="line.454"></a> +<span class="sourceLineNo">455</span> case OPERATIONTIMEOUT:<a name="line.455"></a> +<span class="sourceLineNo">456</span> this.metrics.registerOperationTimeoutException();<a name="line.456"></a> +<span class="sourceLineNo">457</span> retryOrThrow(retryCounter, e, "setData");<a name="line.457"></a> +<span class="sourceLineNo">458</span> break;<a name="line.458"></a> +<span class="sourceLineNo">459</span> case BADVERSION:<a name="line.459"></a> +<span class="sourceLineNo">460</span> if (isRetry) {<a name="line.460"></a> +<span class="sourceLineNo">461</span> // try to verify whether the previous setData success or not<a name="line.461"></a> +<span class="sourceLineNo">462</span> try{<a name="line.462"></a> +<span class="sourceLineNo">463</span> Stat stat = new Stat();<a name="line.463"></a> +<span class="sourceLineNo">464</span> startTime = EnvironmentEdgeManager.currentTime();<a name="line.464"></a> +<span class="sourceLineNo">465</span> byte[] revData = checkZk().getData(path, false, stat);<a name="line.465"></a> +<span class="sourceLineNo">466</span> this.metrics.registerReadOperationLatency(<a name="line.466"></a> +<span class="sourceLineNo">467</span> Math.min(EnvironmentEdgeManager.currentTime() - startTime, 1));<a name="line.467"></a> +<span class="sourceLineNo">468</span> if(Bytes.compareTo(revData, newData) == 0) {<a name="line.468"></a> +<span class="sourceLineNo">469</span> // the bad version is caused by previous successful setData<a name="line.469"></a> +<span class="sourceLineNo">470</span> return stat;<a name="line.470"></a> +<span class="sourceLineNo">471</span> }<a name="line.471"></a> +<span class="sourceLineNo">472</span> } catch(KeeperException keeperException){<a name="line.472"></a> +<span class="sourceLineNo">473</span> this.metrics.registerFailedZKCall();<a name="line.473"></a> +<span class="sourceLineNo">474</span> // the ZK is not reliable at this moment. just throwing exception<a name="line.474"></a> +<span class="sourceLineNo">475</span> throw keeperExc
<TRUNCATED>
