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class="sourceLineNo">160</span> if (runningProcedures == null) {<a name="line.160"></a> +<span class="sourceLineNo">161</span> LOG.debug("No running procedures.");<a name="line.161"></a> +<span class="sourceLineNo">162</span> return;<a name="line.162"></a> +<span class="sourceLineNo">163</span> }<a name="line.163"></a> +<span class="sourceLineNo">164</span> } catch (KeeperException e) {<a name="line.164"></a> +<span class="sourceLineNo">165</span> member.controllerConnectionFailure("General failure when watching for new procedures",<a name="line.165"></a> +<span class="sourceLineNo">166</span> e, null);<a name="line.166"></a> <span class="sourceLineNo">167</span> }<a name="line.167"></a> -<span class="sourceLineNo">168</span> for (String procName : runningProcedures) {<a name="line.168"></a> -<span class="sourceLineNo">169</span> // then read in the procedure information<a name="line.169"></a> -<span class="sourceLineNo">170</span> String path = ZNodePaths.joinZNode(zkController.getAcquiredBarrier(), procName);<a name="line.170"></a> -<span class="sourceLineNo">171</span> startNewSubprocedure(path);<a name="line.171"></a> -<span class="sourceLineNo">172</span> }<a name="line.172"></a> -<span class="sourceLineNo">173</span> }<a name="line.173"></a> -<span class="sourceLineNo">174</span><a name="line.174"></a> -<span class="sourceLineNo">175</span> /**<a name="line.175"></a> -<span class="sourceLineNo">176</span> * Kick off a new sub-procedure on the listener with the data stored in the passed znode.<a name="line.176"></a> -<span class="sourceLineNo">177</span> * <p><a name="line.177"></a> -<span class="sourceLineNo">178</span> * Will attempt to create the same procedure multiple times if an procedure znode with the same<a name="line.178"></a> -<span class="sourceLineNo">179</span> * name is created. It is left up the coordinator to ensure this doesn't occur.<a name="line.179"></a> -<span class="sourceLineNo">180</span> * @param path full path to the znode for the procedure to start<a name="line.180"></a> -<span class="sourceLineNo">181</span> */<a name="line.181"></a> -<span class="sourceLineNo">182</span> private synchronized void startNewSubprocedure(String path) {<a name="line.182"></a> -<span class="sourceLineNo">183</span> LOG.debug("Found procedure znode: " + path);<a name="line.183"></a> -<span class="sourceLineNo">184</span> String opName = ZKUtil.getNodeName(path);<a name="line.184"></a> -<span class="sourceLineNo">185</span> // start watching for an abort notification for the procedure<a name="line.185"></a> -<span class="sourceLineNo">186</span> String abortZNode = zkController.getAbortZNode(opName);<a name="line.186"></a> -<span class="sourceLineNo">187</span> try {<a name="line.187"></a> -<span class="sourceLineNo">188</span> if (ZKUtil.watchAndCheckExists(zkController.getWatcher(), abortZNode)) {<a name="line.188"></a> -<span class="sourceLineNo">189</span> LOG.debug("Not starting:" + opName + " because we already have an abort notification.");<a name="line.189"></a> -<span class="sourceLineNo">190</span> return;<a name="line.190"></a> -<span class="sourceLineNo">191</span> }<a name="line.191"></a> -<span class="sourceLineNo">192</span> } catch (KeeperException e) {<a name="line.192"></a> -<span class="sourceLineNo">193</span> member.controllerConnectionFailure("Failed to get the abort znode (" + abortZNode<a name="line.193"></a> -<span class="sourceLineNo">194</span> + ") for procedure :" + opName, e, opName);<a name="line.194"></a> -<span class="sourceLineNo">195</span> return;<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> // get the data for the procedure<a name="line.198"></a> -<span class="sourceLineNo">199</span> Subprocedure subproc = null;<a name="line.199"></a> -<span class="sourceLineNo">200</span> try {<a name="line.200"></a> -<span class="sourceLineNo">201</span> byte[] data = ZKUtil.getData(zkController.getWatcher(), path);<a name="line.201"></a> -<span class="sourceLineNo">202</span> if (!ProtobufUtil.isPBMagicPrefix(data)) {<a name="line.202"></a> -<span class="sourceLineNo">203</span> String msg = "Data in for starting procedure " + opName +<a name="line.203"></a> -<span class="sourceLineNo">204</span> " is illegally formatted (no pb magic). " +<a name="line.204"></a> -<span class="sourceLineNo">205</span> "Killing the procedure: " + Bytes.toString(data);<a name="line.205"></a> -<span class="sourceLineNo">206</span> LOG.error(msg);<a name="line.206"></a> -<span class="sourceLineNo">207</span> throw new IllegalArgumentException(msg);<a name="line.207"></a> -<span class="sourceLineNo">208</span> }<a name="line.208"></a> -<span class="sourceLineNo">209</span> LOG.debug("start proc data length is " + data.length);<a name="line.209"></a> -<span class="sourceLineNo">210</span> data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);<a name="line.210"></a> -<span class="sourceLineNo">211</span> LOG.debug("Found data for znode:" + path);<a name="line.211"></a> -<span class="sourceLineNo">212</span> subproc = member.createSubprocedure(opName, data);<a name="line.212"></a> -<span class="sourceLineNo">213</span> member.submitSubprocedure(subproc);<a name="line.213"></a> -<span class="sourceLineNo">214</span> } catch (IllegalArgumentException iae ) {<a name="line.214"></a> -<span class="sourceLineNo">215</span> LOG.error("Illegal argument exception", iae);<a name="line.215"></a> -<span class="sourceLineNo">216</span> sendMemberAborted(subproc, new ForeignException(getMemberName(), iae));<a name="line.216"></a> -<span class="sourceLineNo">217</span> } catch (IllegalStateException ise) {<a name="line.217"></a> -<span class="sourceLineNo">218</span> LOG.error("Illegal state exception ", ise);<a name="line.218"></a> -<span class="sourceLineNo">219</span> sendMemberAborted(subproc, new ForeignException(getMemberName(), ise));<a name="line.219"></a> -<span class="sourceLineNo">220</span> } catch (KeeperException e) {<a name="line.220"></a> -<span class="sourceLineNo">221</span> member.controllerConnectionFailure("Failed to get data for new procedure:" + opName,<a name="line.221"></a> -<span class="sourceLineNo">222</span> e, opName);<a name="line.222"></a> -<span class="sourceLineNo">223</span> } catch (InterruptedException e) {<a name="line.223"></a> -<span class="sourceLineNo">224</span> member.controllerConnectionFailure("Failed to get data for new procedure:" + opName,<a name="line.224"></a> -<span class="sourceLineNo">225</span> e, opName);<a name="line.225"></a> -<span class="sourceLineNo">226</span> Thread.currentThread().interrupt();<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> * This attempts to create an acquired state znode for the procedure (snapshot name).<a name="line.231"></a> -<span class="sourceLineNo">232</span> *<a name="line.232"></a> -<span class="sourceLineNo">233</span> * It then looks for the reached znode to trigger in-barrier execution. If not present we<a name="line.233"></a> -<span class="sourceLineNo">234</span> * have a watcher, if present then trigger the in-barrier action.<a name="line.234"></a> -<span class="sourceLineNo">235</span> */<a name="line.235"></a> -<span class="sourceLineNo">236</span> @Override<a name="line.236"></a> -<span class="sourceLineNo">237</span> public void sendMemberAcquired(Subprocedure sub) throws IOException {<a name="line.237"></a> -<span class="sourceLineNo">238</span> String procName = sub.getName();<a name="line.238"></a> -<span class="sourceLineNo">239</span> try {<a name="line.239"></a> -<span class="sourceLineNo">240</span> LOG.debug("Member: '" + memberName + "' joining acquired barrier for procedure (" + procName<a name="line.240"></a> -<span class="sourceLineNo">241</span> + ") in zk");<a name="line.241"></a> -<span class="sourceLineNo">242</span> String acquiredZNode = ZNodePaths.joinZNode(ZKProcedureUtil.getAcquireBarrierNode(<a name="line.242"></a> -<span class="sourceLineNo">243</span> zkController, procName), memberName);<a name="line.243"></a> -<span class="sourceLineNo">244</span> ZKUtil.createAndFailSilent(zkController.getWatcher(), acquiredZNode);<a name="line.244"></a> -<span class="sourceLineNo">245</span><a name="line.245"></a> -<span class="sourceLineNo">246</span> // watch for the complete node for this snapshot<a name="line.246"></a> -<span class="sourceLineNo">247</span> String reachedBarrier = zkController.getReachedBarrierNode(procName);<a name="line.247"></a> -<span class="sourceLineNo">248</span> LOG.debug("Watch for global barrier reached:" + reachedBarrier);<a name="line.248"></a> -<span class="sourceLineNo">249</span> if (ZKUtil.watchAndCheckExists(zkController.getWatcher(), reachedBarrier)) {<a name="line.249"></a> -<span class="sourceLineNo">250</span> receivedReachedGlobalBarrier(reachedBarrier);<a name="line.250"></a> -<span class="sourceLineNo">251</span> }<a name="line.251"></a> -<span class="sourceLineNo">252</span> } catch (KeeperException e) {<a name="line.252"></a> -<span class="sourceLineNo">253</span> member.controllerConnectionFailure("Failed to acquire barrier for procedure: "<a name="line.253"></a> -<span class="sourceLineNo">254</span> + procName + " and member: " + memberName, e, procName);<a name="line.254"></a> -<span class="sourceLineNo">255</span> }<a name="line.255"></a> -<span class="sourceLineNo">256</span> }<a name="line.256"></a> -<span class="sourceLineNo">257</span><a name="line.257"></a> -<span class="sourceLineNo">258</span> /**<a name="line.258"></a> -<span class="sourceLineNo">259</span> * This acts as the ack for a completed procedure<a name="line.259"></a> -<span class="sourceLineNo">260</span> */<a name="line.260"></a> -<span class="sourceLineNo">261</span> @Override<a name="line.261"></a> -<span class="sourceLineNo">262</span> public void sendMemberCompleted(Subprocedure sub, byte[] data) throws IOException {<a name="line.262"></a> -<span class="sourceLineNo">263</span> String procName = sub.getName();<a name="line.263"></a> -<span class="sourceLineNo">264</span> LOG.debug("Marking procedure '" + procName + "' completed for member '" + memberName<a name="line.264"></a> -<span class="sourceLineNo">265</span> + "' in zk");<a name="line.265"></a> -<span class="sourceLineNo">266</span> String joinPath =<a name="line.266"></a> -<span class="sourceLineNo">267</span> ZNodePaths.joinZNode(zkController.getReachedBarrierNode(procName), memberName);<a name="line.267"></a> -<span class="sourceLineNo">268</span> // ProtobufUtil.prependPBMagic does not take care of null<a name="line.268"></a> -<span class="sourceLineNo">269</span> if (data == null) {<a name="line.269"></a> -<span class="sourceLineNo">270</span> data = new byte[0];<a name="line.270"></a> -<span class="sourceLineNo">271</span> }<a name="line.271"></a> -<span class="sourceLineNo">272</span> try {<a name="line.272"></a> -<span class="sourceLineNo">273</span> ZKUtil.createAndFailSilent(zkController.getWatcher(), joinPath,<a name="line.273"></a> -<span class="sourceLineNo">274</span> ProtobufUtil.prependPBMagic(data));<a name="line.274"></a> -<span class="sourceLineNo">275</span> } catch (KeeperException e) {<a name="line.275"></a> -<span class="sourceLineNo">276</span> member.controllerConnectionFailure("Failed to post zk node:" + joinPath<a name="line.276"></a> -<span class="sourceLineNo">277</span> + " to join procedure barrier.", e, procName);<a name="line.277"></a> -<span class="sourceLineNo">278</span> }<a name="line.278"></a> -<span class="sourceLineNo">279</span> }<a name="line.279"></a> -<span class="sourceLineNo">280</span><a name="line.280"></a> -<span class="sourceLineNo">281</span> /**<a name="line.281"></a> -<span class="sourceLineNo">282</span> * This should be called by the member and should write a serialized root cause exception as<a name="line.282"></a> -<span class="sourceLineNo">283</span> * to the abort znode.<a name="line.283"></a> -<span class="sourceLineNo">284</span> */<a name="line.284"></a> -<span class="sourceLineNo">285</span> @Override<a name="line.285"></a> -<span class="sourceLineNo">286</span> public void sendMemberAborted(Subprocedure sub, ForeignException ee) {<a name="line.286"></a> -<span class="sourceLineNo">287</span> if (sub == null) {<a name="line.287"></a> -<span class="sourceLineNo">288</span> LOG.error("Failed due to null subprocedure", ee);<a name="line.288"></a> -<span class="sourceLineNo">289</span> return;<a name="line.289"></a> -<span class="sourceLineNo">290</span> }<a name="line.290"></a> -<span class="sourceLineNo">291</span> String procName = sub.getName();<a name="line.291"></a> -<span class="sourceLineNo">292</span> LOG.debug("Aborting procedure (" + procName + ") in zk");<a name="line.292"></a> -<span class="sourceLineNo">293</span> String procAbortZNode = zkController.getAbortZNode(procName);<a name="line.293"></a> -<span class="sourceLineNo">294</span> try {<a name="line.294"></a> -<span class="sourceLineNo">295</span> String source = (ee.getSource() == null) ? memberName: ee.getSource();<a name="line.295"></a> -<span class="sourceLineNo">296</span> byte[] errorInfo = ProtobufUtil.prependPBMagic(ForeignException.serialize(source, ee));<a name="line.296"></a> -<span class="sourceLineNo">297</span> ZKUtil.createAndFailSilent(zkController.getWatcher(), procAbortZNode, errorInfo);<a name="line.297"></a> -<span class="sourceLineNo">298</span> LOG.debug("Finished creating abort znode:" + procAbortZNode);<a name="line.298"></a> -<span class="sourceLineNo">299</span> } catch (KeeperException e) {<a name="line.299"></a> -<span class="sourceLineNo">300</span> // possible that we get this error for the procedure if we already reset the zk state, but in<a name="line.300"></a> -<span class="sourceLineNo">301</span> // that case we should still get an error for that procedure anyways<a name="line.301"></a> -<span class="sourceLineNo">302</span> zkController.logZKTree(zkController.getBaseZnode());<a name="line.302"></a> -<span class="sourceLineNo">303</span> member.controllerConnectionFailure("Failed to post zk node:" + procAbortZNode<a name="line.303"></a> -<span class="sourceLineNo">304</span> + " to abort procedure", e, procName);<a name="line.304"></a> -<span class="sourceLineNo">305</span> }<a name="line.305"></a> -<span class="sourceLineNo">306</span> }<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> * Pass along the found abort notification to the listener<a name="line.309"></a> -<span class="sourceLineNo">310</span> * @param abortZNode full znode path to the failed procedure information<a name="line.310"></a> -<span class="sourceLineNo">311</span> */<a name="line.311"></a> -<span class="sourceLineNo">312</span> protected void abort(String abortZNode) {<a name="line.312"></a> -<span class="sourceLineNo">313</span> LOG.debug("Aborting procedure member for znode " + abortZNode);<a name="line.313"></a> -<span class="sourceLineNo">314</span> String opName = ZKUtil.getNodeName(abortZNode);<a name="line.314"></a> -<span class="sourceLineNo">315</span> try {<a name="line.315"></a> -<span class="sourceLineNo">316</span> byte[] data = ZKUtil.getData(zkController.getWatcher(), abortZNode);<a name="line.316"></a> -<span class="sourceLineNo">317</span><a name="line.317"></a> -<span class="sourceLineNo">318</span> // figure out the data we need to pass<a name="line.318"></a> -<span class="sourceLineNo">319</span> ForeignException ee;<a name="line.319"></a> -<span class="sourceLineNo">320</span> try {<a name="line.320"></a> -<span class="sourceLineNo">321</span> if (data == null || data.length == 0) {<a name="line.321"></a> -<span class="sourceLineNo">322</span> // ignore<a name="line.322"></a> -<span class="sourceLineNo">323</span> return;<a name="line.323"></a> -<span class="sourceLineNo">324</span> } else if (!ProtobufUtil.isPBMagicPrefix(data)) {<a name="line.324"></a> -<span class="sourceLineNo">325</span> String msg = "Illegally formatted data in abort node for proc " + opName<a name="line.325"></a> -<span class="sourceLineNo">326</span> + ". Killing the procedure.";<a name="line.326"></a> -<span class="sourceLineNo">327</span> LOG.error(msg);<a name="line.327"></a> -<span class="sourceLineNo">328</span> // we got a remote exception, but we can't describe it so just return exn from here<a name="line.328"></a> -<span class="sourceLineNo">329</span> ee = new ForeignException(getMemberName(), new IllegalArgumentException(msg));<a name="line.329"></a> -<span class="sourceLineNo">330</span> } else {<a name="line.330"></a> -<span class="sourceLineNo">331</span> data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);<a name="line.331"></a> -<span class="sourceLineNo">332</span> ee = ForeignException.deserialize(data);<a name="line.332"></a> -<span class="sourceLineNo">333</span> }<a name="line.333"></a> -<span class="sourceLineNo">334</span> } catch (IOException e) {<a name="line.334"></a> -<span class="sourceLineNo">335</span> LOG.warn("Got an error notification for op:" + opName<a name="line.335"></a> -<span class="sourceLineNo">336</span> + " but we can't read the information. Killing the procedure.");<a name="line.336"></a> -<span class="sourceLineNo">337</span> // we got a remote exception, but we can't describe it so just return exn from here<a name="line.337"></a> -<span class="sourceLineNo">338</span> ee = new ForeignException(getMemberName(), 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> this.member.receiveAbortProcedure(opName, ee);<a name="line.341"></a> -<span class="sourceLineNo">342</span> } catch (KeeperException e) {<a name="line.342"></a> -<span class="sourceLineNo">343</span> member.controllerConnectionFailure("Failed to get data for abort znode:" + abortZNode<a name="line.343"></a> -<span class="sourceLineNo">344</span> + zkController.getAbortZnode(), e, opName);<a name="line.344"></a> -<span class="sourceLineNo">345</span> } catch (InterruptedException e) {<a name="line.345"></a> -<span class="sourceLineNo">346</span> LOG.warn("abort already in progress", e);<a name="line.346"></a> -<span class="sourceLineNo">347</span> Thread.currentThread().interrupt();<a name="line.347"></a> -<span class="sourceLineNo">348</span> }<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> @Override<a name="line.351"></a> -<span class="sourceLineNo">352</span> public void start(final String memberName, final ProcedureMember listener) {<a name="line.352"></a> -<span class="sourceLineNo">353</span> LOG.debug("Starting procedure member '" + memberName + "'");<a name="line.353"></a> -<span class="sourceLineNo">354</span> this.member = listener;<a name="line.354"></a> -<span class="sourceLineNo">355</span> this.memberName = memberName;<a name="line.355"></a> -<span class="sourceLineNo">356</span> watchForAbortedProcedures();<a name="line.356"></a> -<span class="sourceLineNo">357</span> waitForNewProcedures();<a name="line.357"></a> -<span class="sourceLineNo">358</span> }<a name="line.358"></a> -<span class="sourceLineNo">359</span><a name="line.359"></a> -<span class="sourceLineNo">360</span> @Override<a name="line.360"></a> -<span class="sourceLineNo">361</span> public void close() throws IOException {<a name="line.361"></a> -<span class="sourceLineNo">362</span> zkController.close();<a name="line.362"></a> -<span class="sourceLineNo">363</span> }<a name="line.363"></a> -<span class="sourceLineNo">364</span><a name="line.364"></a> -<span class="sourceLineNo">365</span>}<a name="line.365"></a> +<span class="sourceLineNo">168</span> if (runningProcedures == null) {<a name="line.168"></a> +<span class="sourceLineNo">169</span> LOG.debug("No running procedures.");<a name="line.169"></a> +<span class="sourceLineNo">170</span> return;<a name="line.170"></a> +<span class="sourceLineNo">171</span> }<a name="line.171"></a> +<span class="sourceLineNo">172</span> for (String procName : runningProcedures) {<a name="line.172"></a> +<span class="sourceLineNo">173</span> // then read in the procedure information<a name="line.173"></a> +<span class="sourceLineNo">174</span> String path = ZNodePaths.joinZNode(zkController.getAcquiredBarrier(), procName);<a name="line.174"></a> +<span class="sourceLineNo">175</span> startNewSubprocedure(path);<a name="line.175"></a> +<span class="sourceLineNo">176</span> }<a name="line.176"></a> +<span class="sourceLineNo">177</span> }<a name="line.177"></a> +<span class="sourceLineNo">178</span><a name="line.178"></a> +<span class="sourceLineNo">179</span> /**<a name="line.179"></a> +<span class="sourceLineNo">180</span> * Kick off a new sub-procedure on the listener with the data stored in the passed znode.<a name="line.180"></a> +<span class="sourceLineNo">181</span> * <p><a name="line.181"></a> +<span class="sourceLineNo">182</span> * Will attempt to create the same procedure multiple times if an procedure znode with the same<a name="line.182"></a> +<span class="sourceLineNo">183</span> * name is created. It is left up the coordinator to ensure this doesn't occur.<a name="line.183"></a> +<span class="sourceLineNo">184</span> * @param path full path to the znode for the procedure to start<a name="line.184"></a> +<span class="sourceLineNo">185</span> */<a name="line.185"></a> +<span class="sourceLineNo">186</span> private synchronized void startNewSubprocedure(String path) {<a name="line.186"></a> +<span class="sourceLineNo">187</span> LOG.debug("Found procedure znode: " + path);<a name="line.187"></a> +<span class="sourceLineNo">188</span> String opName = ZKUtil.getNodeName(path);<a name="line.188"></a> +<span class="sourceLineNo">189</span> // start watching for an abort notification for the procedure<a name="line.189"></a> +<span class="sourceLineNo">190</span> String abortZNode = zkController.getAbortZNode(opName);<a name="line.190"></a> +<span class="sourceLineNo">191</span> try {<a name="line.191"></a> +<span class="sourceLineNo">192</span> if (ZKUtil.watchAndCheckExists(zkController.getWatcher(), abortZNode)) {<a name="line.192"></a> +<span class="sourceLineNo">193</span> LOG.debug("Not starting:" + opName + " because we already have an abort notification.");<a name="line.193"></a> +<span class="sourceLineNo">194</span> return;<a name="line.194"></a> +<span class="sourceLineNo">195</span> }<a name="line.195"></a> +<span class="sourceLineNo">196</span> } catch (KeeperException e) {<a name="line.196"></a> +<span class="sourceLineNo">197</span> member.controllerConnectionFailure("Failed to get the abort znode (" + abortZNode<a name="line.197"></a> +<span class="sourceLineNo">198</span> + ") for procedure :" + opName, e, opName);<a name="line.198"></a> +<span class="sourceLineNo">199</span> return;<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> // get the data for the procedure<a name="line.202"></a> +<span class="sourceLineNo">203</span> Subprocedure subproc = null;<a name="line.203"></a> +<span class="sourceLineNo">204</span> try {<a name="line.204"></a> +<span class="sourceLineNo">205</span> byte[] data = ZKUtil.getData(zkController.getWatcher(), path);<a name="line.205"></a> +<span class="sourceLineNo">206</span> if (!ProtobufUtil.isPBMagicPrefix(data)) {<a name="line.206"></a> +<span class="sourceLineNo">207</span> String msg = "Data in for starting procedure " + opName +<a name="line.207"></a> +<span class="sourceLineNo">208</span> " is illegally formatted (no pb magic). " +<a name="line.208"></a> +<span class="sourceLineNo">209</span> "Killing the procedure: " + Bytes.toString(data);<a name="line.209"></a> +<span class="sourceLineNo">210</span> LOG.error(msg);<a name="line.210"></a> +<span class="sourceLineNo">211</span> throw new IllegalArgumentException(msg);<a name="line.211"></a> +<span class="sourceLineNo">212</span> }<a name="line.212"></a> +<span class="sourceLineNo">213</span> LOG.debug("start proc data length is " + data.length);<a name="line.213"></a> +<span class="sourceLineNo">214</span> data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);<a name="line.214"></a> +<span class="sourceLineNo">215</span> LOG.debug("Found data for znode:" + path);<a name="line.215"></a> +<span class="sourceLineNo">216</span> subproc = member.createSubprocedure(opName, data);<a name="line.216"></a> +<span class="sourceLineNo">217</span> member.submitSubprocedure(subproc);<a name="line.217"></a> +<span class="sourceLineNo">218</span> } catch (IllegalArgumentException iae ) {<a name="line.218"></a> +<span class="sourceLineNo">219</span> LOG.error("Illegal argument exception", iae);<a name="line.219"></a> +<span class="sourceLineNo">220</span> sendMemberAborted(subproc, new ForeignException(getMemberName(), iae));<a name="line.220"></a> +<span class="sourceLineNo">221</span> } catch (IllegalStateException ise) {<a name="line.221"></a> +<span class="sourceLineNo">222</span> LOG.error("Illegal state exception ", ise);<a name="line.222"></a> +<span class="sourceLineNo">223</span> sendMemberAborted(subproc, new ForeignException(getMemberName(), ise));<a name="line.223"></a> +<span class="sourceLineNo">224</span> } catch (KeeperException e) {<a name="line.224"></a> +<span class="sourceLineNo">225</span> member.controllerConnectionFailure("Failed to get data for new procedure:" + opName,<a name="line.225"></a> +<span class="sourceLineNo">226</span> e, opName);<a name="line.226"></a> +<span class="sourceLineNo">227</span> } catch (InterruptedException e) {<a name="line.227"></a> +<span class="sourceLineNo">228</span> member.controllerConnectionFailure("Failed to get data for new procedure:" + opName,<a name="line.228"></a> +<span class="sourceLineNo">229</span> e, opName);<a name="line.229"></a> +<span class="sourceLineNo">230</span> Thread.currentThread().interrupt();<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><a name="line.233"></a> +<span class="sourceLineNo">234</span> /**<a name="line.234"></a> +<span class="sourceLineNo">235</span> * This attempts to create an acquired state znode for the procedure (snapshot name).<a name="line.235"></a> +<span class="sourceLineNo">236</span> *<a name="line.236"></a> +<span class="sourceLineNo">237</span> * It then looks for the reached znode to trigger in-barrier execution. If not present we<a name="line.237"></a> +<span class="sourceLineNo">238</span> * have a watcher, if present then trigger the in-barrier action.<a name="line.238"></a> +<span class="sourceLineNo">239</span> */<a name="line.239"></a> +<span class="sourceLineNo">240</span> @Override<a name="line.240"></a> +<span class="sourceLineNo">241</span> public void sendMemberAcquired(Subprocedure sub) throws IOException {<a name="line.241"></a> +<span class="sourceLineNo">242</span> String procName = sub.getName();<a name="line.242"></a> +<span class="sourceLineNo">243</span> try {<a name="line.243"></a> +<span class="sourceLineNo">244</span> LOG.debug("Member: '" + memberName + "' joining acquired barrier for procedure (" + procName<a name="line.244"></a> +<span class="sourceLineNo">245</span> + ") in zk");<a name="line.245"></a> +<span class="sourceLineNo">246</span> String acquiredZNode = ZNodePaths.joinZNode(ZKProcedureUtil.getAcquireBarrierNode(<a name="line.246"></a> +<span class="sourceLineNo">247</span> zkController, procName), memberName);<a name="line.247"></a> +<span class="sourceLineNo">248</span> ZKUtil.createAndFailSilent(zkController.getWatcher(), acquiredZNode);<a name="line.248"></a> +<span class="sourceLineNo">249</span><a name="line.249"></a> +<span class="sourceLineNo">250</span> // watch for the complete node for this snapshot<a name="line.250"></a> +<span class="sourceLineNo">251</span> String reachedBarrier = zkController.getReachedBarrierNode(procName);<a name="line.251"></a> +<span class="sourceLineNo">252</span> LOG.debug("Watch for global barrier reached:" + reachedBarrier);<a name="line.252"></a> +<span class="sourceLineNo">253</span> if (ZKUtil.watchAndCheckExists(zkController.getWatcher(), reachedBarrier)) {<a name="line.253"></a> +<span class="sourceLineNo">254</span> receivedReachedGlobalBarrier(reachedBarrier);<a name="line.254"></a> +<span class="sourceLineNo">255</span> }<a name="line.255"></a> +<span class="sourceLineNo">256</span> } catch (KeeperException e) {<a name="line.256"></a> +<span class="sourceLineNo">257</span> member.controllerConnectionFailure("Failed to acquire barrier for procedure: "<a name="line.257"></a> +<span class="sourceLineNo">258</span> + procName + " and member: " + memberName, e, procName);<a name="line.258"></a> +<span class="sourceLineNo">259</span> }<a name="line.259"></a> +<span class="sourceLineNo">260</span> }<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> * This acts as the ack for a completed procedure<a name="line.263"></a> +<span class="sourceLineNo">264</span> */<a name="line.264"></a> +<span class="sourceLineNo">265</span> @Override<a name="line.265"></a> +<span class="sourceLineNo">266</span> public void sendMemberCompleted(Subprocedure sub, byte[] data) throws IOException {<a name="line.266"></a> +<span class="sourceLineNo">267</span> String procName = sub.getName();<a name="line.267"></a> +<span class="sourceLineNo">268</span> LOG.debug("Marking procedure '" + procName + "' completed for member '" + memberName<a name="line.268"></a> +<span class="sourceLineNo">269</span> + "' in zk");<a name="line.269"></a> +<span class="sourceLineNo">270</span> String joinPath =<a name="line.270"></a> +<span class="sourceLineNo">271</span> ZNodePaths.joinZNode(zkController.getReachedBarrierNode(procName), memberName);<a name="line.271"></a> +<span class="sourceLineNo">272</span> // ProtobufUtil.prependPBMagic does not take care of null<a name="line.272"></a> +<span class="sourceLineNo">273</span> if (data == null) {<a name="line.273"></a> +<span class="sourceLineNo">274</span> data = new byte[0];<a name="line.274"></a> +<span class="sourceLineNo">275</span> }<a name="line.275"></a> +<span class="sourceLineNo">276</span> try {<a name="line.276"></a> +<span class="sourceLineNo">277</span> ZKUtil.createAndFailSilent(zkController.getWatcher(), joinPath,<a name="line.277"></a> +<span class="sourceLineNo">278</span> ProtobufUtil.prependPBMagic(data));<a name="line.278"></a> +<span class="sourceLineNo">279</span> } catch (KeeperException e) {<a name="line.279"></a> +<span class="sourceLineNo">280</span> member.controllerConnectionFailure("Failed to post zk node:" + joinPath<a name="line.280"></a> +<span class="sourceLineNo">281</span> + " to join procedure barrier.", e, procName);<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> /**<a name="line.285"></a> +<span class="sourceLineNo">286</span> * This should be called by the member and should write a serialized root cause exception as<a name="line.286"></a> +<span class="sourceLineNo">287</span> * to the abort znode.<a name="line.287"></a> +<span class="sourceLineNo">288</span> */<a name="line.288"></a> +<span class="sourceLineNo">289</span> @Override<a name="line.289"></a> +<span class="sourceLineNo">290</span> public void sendMemberAborted(Subprocedure sub, ForeignException ee) {<a name="line.290"></a> +<span class="sourceLineNo">291</span> if (sub == null) {<a name="line.291"></a> +<span class="sourceLineNo">292</span> LOG.error("Failed due to null subprocedure", ee);<a name="line.292"></a> +<span class="sourceLineNo">293</span> return;<a name="line.293"></a> +<span class="sourceLineNo">294</span> }<a name="line.294"></a> +<span class="sourceLineNo">295</span> String procName = sub.getName();<a name="line.295"></a> +<span class="sourceLineNo">296</span> LOG.debug("Aborting procedure (" + procName + ") in zk");<a name="line.296"></a> +<span class="sourceLineNo">297</span> String procAbortZNode = zkController.getAbortZNode(procName);<a name="line.297"></a> +<span class="sourceLineNo">298</span> try {<a name="line.298"></a> +<span class="sourceLineNo">299</span> String source = (ee.getSource() == null) ? memberName: ee.getSource();<a name="line.299"></a> +<span class="sourceLineNo">300</span> byte[] errorInfo = ProtobufUtil.prependPBMagic(ForeignException.serialize(source, ee));<a name="line.300"></a> +<span class="sourceLineNo">301</span> ZKUtil.createAndFailSilent(zkController.getWatcher(), procAbortZNode, errorInfo);<a name="line.301"></a> +<span class="sourceLineNo">302</span> LOG.debug("Finished creating abort znode:" + procAbortZNode);<a name="line.302"></a> +<span class="sourceLineNo">303</span> } catch (KeeperException e) {<a name="line.303"></a> +<span class="sourceLineNo">304</span> // possible that we get this error for the procedure if we already reset the zk state, but in<a name="line.304"></a> +<span class="sourceLineNo">305</span> // that case we should still get an error for that procedure anyways<a name="line.305"></a> +<span class="sourceLineNo">306</span> zkController.logZKTree(zkController.getBaseZnode());<a name="line.306"></a> +<span class="sourceLineNo">307</span> member.controllerConnectionFailure("Failed to post zk node:" + procAbortZNode<a name="line.307"></a> +<span class="sourceLineNo">308</span> + " to abort procedure", e, procName);<a name="line.308"></a> +<span class="sourceLineNo">309</span> }<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> * Pass along the found abort notification to the listener<a name="line.313"></a> +<span class="sourceLineNo">314</span> * @param abortZNode full znode path to the failed procedure information<a name="line.314"></a> +<span class="sourceLineNo">315</span> */<a name="line.315"></a> +<span class="sourceLineNo">316</span> protected void abort(String abortZNode) {<a name="line.316"></a> +<span class="sourceLineNo">317</span> LOG.debug("Aborting procedure member for znode " + abortZNode);<a name="line.317"></a> +<span class="sourceLineNo">318</span> String opName = ZKUtil.getNodeName(abortZNode);<a name="line.318"></a> +<span class="sourceLineNo">319</span> try {<a name="line.319"></a> +<span class="sourceLineNo">320</span> byte[] data = ZKUtil.getData(zkController.getWatcher(), abortZNode);<a name="line.320"></a> +<span class="sourceLineNo">321</span><a name="line.321"></a> +<span class="sourceLineNo">322</span> // figure out the data we need to pass<a name="line.322"></a> +<span class="sourceLineNo">323</span> ForeignException ee;<a name="line.323"></a> +<span class="sourceLineNo">324</span> try {<a name="line.324"></a> +<span class="sourceLineNo">325</span> if (data == null || data.length == 0) {<a name="line.325"></a> +<span class="sourceLineNo">326</span> // ignore<a name="line.326"></a> +<span class="sourceLineNo">327</span> return;<a name="line.327"></a> +<span class="sourceLineNo">328</span> } else if (!ProtobufUtil.isPBMagicPrefix(data)) {<a name="line.328"></a> +<span class="sourceLineNo">329</span> String msg = "Illegally formatted data in abort node for proc " + opName<a name="line.329"></a> +<span class="sourceLineNo">330</span> + ". Killing the procedure.";<a name="line.330"></a> +<span class="sourceLineNo">331</span> LOG.error(msg);<a name="line.331"></a> +<span class="sourceLineNo">332</span> // we got a remote exception, but we can't describe it so just return exn from here<a name="line.332"></a> +<span class="sourceLineNo">333</span> ee = new ForeignException(getMemberName(), new IllegalArgumentException(msg));<a name="line.333"></a> +<span class="sourceLineNo">334</span> } else {<a name="line.334"></a> +<span class="sourceLineNo">335</span> data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);<a name="line.335"></a> +<span class="sourceLineNo">336</span> ee = ForeignException.deserialize(data);<a name="line.336"></a> +<span class="sourceLineNo">337</span> }<a name="line.337"></a> +<span class="sourceLineNo">338</span> } catch (IOException e) {<a name="line.338"></a> +<span class="sourceLineNo">339</span> LOG.warn("Got an error notification for op:" + opName<a name="line.339"></a> +<span class="sourceLineNo">340</span> + " but we can't read the information. Killing the procedure.");<a name="line.340"></a> +<span class="sourceLineNo">341</span> // we got a remote exception, but we can't describe it so just return exn from here<a name="line.341"></a> +<span class="sourceLineNo">342</span> ee = new ForeignException(getMemberName(), e);<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> this.member.receiveAbortProcedure(opName, ee);<a name="line.345"></a> +<span class="sourceLineNo">346</span> } catch (KeeperException e) {<a name="line.346"></a> +<span class="sourceLineNo">347</span> member.controllerConnectionFailure("Failed to get data for abort znode:" + abortZNode<a name="line.347"></a> +<span class="sourceLineNo">348</span> + zkController.getAbortZnode(), e, opName);<a name="line.348"></a> +<span class="sourceLineNo">349</span> } catch (InterruptedException e) {<a name="line.349"></a> +<span class="sourceLineNo">350</span> LOG.warn("abort already in progress", e);<a name="line.350"></a> +<span class="sourceLineNo">351</span> Thread.currentThread().interrupt();<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> @Override<a name="line.355"></a> +<span class="sourceLineNo">356</span> public void start(final String memberName, final ProcedureMember listener) {<a name="line.356"></a> +<span class="sourceLineNo">357</span> LOG.debug("Starting procedure member '" + memberName + "'");<a name="line.357"></a> +<span class="sourceLineNo">358</span> this.member = listener;<a name="line.358"></a> +<span class="sourceLineNo">359</span> this.memberName = memberName;<a name="line.359"></a> +<span class="sourceLineNo">360</span> watchForAbortedProcedures();<a name="line.360"></a> +<span class="sourceLineNo">361</span> waitForNewProcedures();<a name="line.361"></a> +<span class="sourceLineNo">362</span> }<a name="line.362"></a> +<span class="sourceLineNo">363</span><a name="line.363"></a> +<span class="sourceLineNo">364</span> @Override<a name="line.364"></a> +<span class="sourceLineNo">365</span> public void close() throws IOException {<a name="line.365"></a> +<span class="sourceLineNo">366</span> zkController.close();<a name="line.366"></a> +<span class="sourceLineNo">367</span> }<a name="line.367"></a> +<span class="sourceLineNo">368</span><a name="line.368"></a> +<span class="sourceLineNo">369</span>}<a name="line.369"></a>
