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As the javadoc in<a name="line.207"></a> +<span class="sourceLineNo">208</span> * multiOrSequential() method said, if received a NodeExistsException, all operations will<a name="line.208"></a> +<span class="sourceLineNo">209</span> * fail. 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class="sourceLineNo">218</span> }<a name="line.218"></a> +<span class="sourceLineNo">219</span> } catch (KeeperException e) {<a name="line.219"></a> +<span class="sourceLineNo">220</span> throw new ReplicationException("Failed to set log position (serverName=" + serverName<a name="line.220"></a> +<span class="sourceLineNo">221</span> + ", queueId=" + queueId + ", fileName=" + fileName + ", position=" + position + ")", e);<a name="line.221"></a> +<span class="sourceLineNo">222</span> }<a name="line.222"></a> +<span class="sourceLineNo">223</span> }<a name="line.223"></a> +<span class="sourceLineNo">224</span><a name="line.224"></a> +<span class="sourceLineNo">225</span> @Override<a name="line.225"></a> +<span class="sourceLineNo">226</span> public long getLastSequenceId(String encodedRegionName, String peerId)<a name="line.226"></a> +<span class="sourceLineNo">227</span> throws ReplicationException {<a name="line.227"></a> +<span class="sourceLineNo">228</span> byte[] data;<a name="line.228"></a> +<span class="sourceLineNo">229</span> try {<a name="line.229"></a> +<span class="sourceLineNo">230</span> data =<a name="line.230"></a> +<span class="sourceLineNo">231</span> ZKUtil.getData(zookeeper, getSerialReplicationRegionPeerNode(encodedRegionName, peerId));<a name="line.231"></a> +<span class="sourceLineNo">232</span> } catch (KeeperException | InterruptedException e) {<a name="line.232"></a> +<span class="sourceLineNo">233</span> throw new ReplicationException("Failed to get the last sequence id(region="<a name="line.233"></a> +<span class="sourceLineNo">234</span> + encodedRegionName + ", peerId=" + peerId + ")");<a name="line.234"></a> +<span class="sourceLineNo">235</span> }<a name="line.235"></a> +<span class="sourceLineNo">236</span> try {<a name="line.236"></a> +<span class="sourceLineNo">237</span> return ZKUtil.parseWALPositionFrom(data);<a name="line.237"></a> +<span class="sourceLineNo">238</span> } catch (DeserializationException de) {<a name="line.238"></a> +<span class="sourceLineNo">239</span> LOG.warn("Failed to parse log position (region=" + encodedRegionName + ", peerId=" + peerId<a name="line.239"></a> +<span class="sourceLineNo">240</span> + "), data=" + Bytes.toStringBinary(data));<a name="line.240"></a> +<span class="sourceLineNo">241</span> }<a name="line.241"></a> +<span class="sourceLineNo">242</span> return HConstants.NO_SEQNUM;<a name="line.242"></a> +<span class="sourceLineNo">243</span> }<a name="line.243"></a> +<span class="sourceLineNo">244</span><a name="line.244"></a> +<span class="sourceLineNo">245</span> @Override<a name="line.245"></a> +<span class="sourceLineNo">246</span> public long getWALPosition(ServerName serverName, String queueId, String fileName)<a name="line.246"></a> +<span class="sourceLineNo">247</span> throws ReplicationException {<a name="line.247"></a> +<span class="sourceLineNo">248</span> byte[] bytes;<a name="line.248"></a> +<span class="sourceLineNo">249</span> try {<a name="line.249"></a> +<span class="sourceLineNo">250</span> bytes = ZKUtil.getData(zookeeper, getFileNode(serverName, queueId, fileName));<a name="line.250"></a> +<span class="sourceLineNo">251</span> } catch (KeeperException | InterruptedException e) {<a name="line.251"></a> +<span class="sourceLineNo">252</span> throw new ReplicationException("Failed to get log position (serverName=" + serverName +<a name="line.252"></a> +<span class="sourceLineNo">253</span> ", queueId=" + queueId + ", fileName=" + fileName + ")", e);<a name="line.253"></a> +<span class="sourceLineNo">254</span> }<a name="line.254"></a> +<span class="sourceLineNo">255</span> try {<a name="line.255"></a> +<span class="sourceLineNo">256</span> return ZKUtil.parseWALPositionFrom(bytes);<a name="line.256"></a> +<span class="sourceLineNo">257</span> } catch (DeserializationException de) {<a name="line.257"></a> +<span class="sourceLineNo">258</span> LOG.warn("Failed parse log position (serverName={}, queueId={}, fileName={})",<a name="line.258"></a> +<span class="sourceLineNo">259</span> serverName, queueId, fileName);<a name="line.259"></a> +<span class="sourceLineNo">260</span> }<a name="line.260"></a> +<span class="sourceLineNo">261</span> // if we can not parse the position, start at the beginning of the wal file again<a name="line.261"></a> +<span class="sourceLineNo">262</span> return 0;<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> @Override<a name="line.265"></a> +<span class="sourceLineNo">266</span> public Pair<String, SortedSet<String>> claimQueue(ServerName sourceServerName, String queueId,<a name="line.266"></a> +<span class="sourceLineNo">267</span> ServerName destServerName) throws ReplicationException {<a name="line.267"></a> +<span class="sourceLineNo">268</span> LOG.info("Atomically moving {}/{}'s WALs to {}", sourceServerName, queueId, destServerName);<a name="line.268"></a> +<span class="sourceLineNo">269</span> try {<a name="line.269"></a> +<span class="sourceLineNo">270</span> ZKUtil.createWithParents(zookeeper, getRsNode(destServerName));<a name="line.270"></a> +<span class="sourceLineNo">271</span> } catch (KeeperException e) {<a name="line.271"></a> +<span class="sourceLineNo">272</span> throw new ReplicationException(<a name="line.272"></a> +<span class="sourceLineNo">273</span> "Claim queue queueId=" + queueId + " from " + sourceServerName + " to " + destServerName +<a name="line.273"></a> +<span class="sourceLineNo">274</span> " failed when creating the node for " + destServerName,<a name="line.274"></a> +<span class="sourceLineNo">275</span> e);<a name="line.275"></a> +<span class="sourceLineNo">276</span> }<a name="line.276"></a> +<span class="sourceLineNo">277</span> try {<a name="line.277"></a> +<span class="sourceLineNo">278</span> String oldQueueNode = getQueueNode(sourceServerName, queueId);<a name="line.278"></a> +<span class="sourceLineNo">279</span> List<String> wals = ZKUtil.listChildrenNoWatch(zookeeper, oldQueueNode);<a name="line.279"></a> +<span class="sourceLineNo">280</span> String newQueueId = queueId + "-" + sourceServerName;<a name="line.280"></a> +<span class="sourceLineNo">281</span> if (CollectionUtils.isEmpty(wals)) {<a name="line.281"></a> +<span class="sourceLineNo">282</span> ZKUtil.deleteNodeFailSilent(zookeeper, oldQueueNode);<a name="line.282"></a> +<span class="sourceLineNo">283</span> LOG.info("Removed empty {}/{}", sourceServerName, queueId);<a name="line.283"></a> +<span class="sourceLineNo">284</span> return new Pair<>(newQueueId, Collections.emptySortedSet());<a name="line.284"></a> +<span class="sourceLineNo">285</span> }<a name="line.285"></a> +<span class="sourceLineNo">286</span> String newQueueNode = getQueueNode(destServerName, newQueueId);<a name="line.286"></a> +<span class="sourceLineNo">287</span> List<ZKUtilOp> listOfOps = new ArrayList<>();<a name="line.287"></a> +<span class="sourceLineNo">288</span> SortedSet<String> logQueue = new TreeSet<>();<a name="line.288"></a> +<span class="sourceLineNo">289</span> // create the new cluster znode<a name="line.289"></a> +<span class="sourceLineNo">290</span> listOfOps.add(ZKUtilOp.createAndFailSilent(newQueueNode, HConstants.EMPTY_BYTE_ARRAY));<a name="line.290"></a> +<span class="sourceLineNo">291</span> // get the offset of the logs and set it to new znodes<a name="line.291"></a> +<span class="sourceLineNo">292</span> for (String wal : wals) {<a name="line.292"></a> +<span class="sourceLineNo">293</span> String oldWalNode = getFileNode(oldQueueNode, wal);<a name="line.293"></a> +<span class="sourceLineNo">294</span> byte[] logOffset = ZKUtil.getData(this.zookeeper, oldWalNode);<a name="line.294"></a> +<span class="sourceLineNo">295</span> LOG.debug("Creating {} with data {}", wal, Bytes.toStringBinary(logOffset));<a name="line.295"></a> +<span class="sourceLineNo">296</span> String newWalNode = getFileNode(newQueueNode, wal);<a name="line.296"></a> +<span class="sourceLineNo">297</span> listOfOps.add(ZKUtilOp.createAndFailSilent(newWalNode, logOffset));<a name="line.297"></a> +<span class="sourceLineNo">298</span> listOfOps.add(ZKUtilOp.deleteNodeFailSilent(oldWalNode));<a name="line.298"></a> +<span class="sourceLineNo">299</span> logQueue.add(wal);<a name="line.299"></a> +<span class="sourceLineNo">300</span> }<a name="line.300"></a> +<span class="sourceLineNo">301</span> // add delete op for peer<a name="line.301"></a> +<span class="sourceLineNo">302</span> listOfOps.add(ZKUtilOp.deleteNodeFailSilent(oldQueueNode));<a name="line.302"></a> +<span class="sourceLineNo">303</span><a name="line.303"></a> +<span class="sourceLineNo">304</span> LOG.trace("The multi list size is {}", listOfOps.size());<a name="line.304"></a> +<span class="sourceLineNo">305</span> ZKUtil.multiOrSequential(zookeeper, listOfOps, false);<a name="line.305"></a> +<span class="sourceLineNo">306</span><a name="line.306"></a> +<span class="sourceLineNo">307</span> LOG.info("Atomically moved {}/{}'s WALs to {}", sourceServerName, queueId, destServerName);<a name="line.307"></a> +<span class="sourceLineNo">308</span> return new Pair<>(newQueueId, logQueue);<a name="line.308"></a> +<span class="sourceLineNo">309</span> } catch (NoNodeException | NodeExistsException | NotEmptyException | BadVersionException e) {<a name="line.309"></a> +<span class="sourceLineNo">310</span> // Multi call failed; it looks like some other regionserver took away the logs.<a name="line.310"></a> +<span class="sourceLineNo">311</span> // These exceptions mean that zk tells us the request can not be execute so it is safe to just<a name="line.311"></a> +<span class="sourceLineNo">312</span> // return a null. For other types of exception should be thrown out to notify the upper layer.<a name="line.312"></a> +<span class="sourceLineNo">313</span> LOG.info("Claim queue queueId={} from {} to {} failed with {}, someone else took the log?",<a name="line.313"></a> +<span class="sourceLineNo">314</span> queueId,sourceServerName, destServerName, e.toString());<a name="line.314"></a> +<span class="sourceLineNo">315</span> return null;<a name="line.315"></a> +<span class="sourceLineNo">316</span> } catch (KeeperException | InterruptedException e) {<a name="line.316"></a> +<span class="sourceLineNo">317</span> throw new ReplicationException("Claim queue queueId=" + queueId + " from " +<a name="line.317"></a> +<span class="sourceLineNo">318</span> sourceServerName + " to " + destServerName + " failed", e);<a name="line.318"></a> +<span class="sourceLineNo">319</span> }<a name="line.319"></a> +<span class="sourceLineNo">320</span> }<a name="line.320"></a> +<span class="sourceLineNo">321</span><a name="line.321"></a> +<span class="sourceLineNo">322</span> @Override<a name="line.322"></a> +<span class="sourceLineNo">323</span> public void removeReplicatorIfQueueIsEmpty(ServerName serverName) throws ReplicationException {<a name="line.323"></a> +<span class="sourceLineNo">324</span> try {<a name="line.324"></a> +<span class="sourceLineNo">325</span> ZKUtil.deleteNodeFailSilent(zookeeper, getRsNode(serverName));<a name="line.325"></a> +<span class="sourceLineNo">326</span> } catch (NotEmptyException e) {<a name="line.326"></a> +<span class="sourceLineNo">327</span> // keep silence to avoid logging too much.<a name="line.327"></a> +<span class="sourceLineNo">328</span> } catch (KeeperException e) {<a name="line.328"></a> +<span class="sourceLineNo">329</span> throw new ReplicationException("Failed to remove replicator for " + serverName, e);<a name="line.329"></a> +<span class="sourceLineNo">330</span> }<a name="line.330"></a> +<span class="sourceLineNo">331</span> }<a name="line.331"></a> +<span class="sourceLineNo">332</span><a name="line.332"></a> +<span class="sourceLineNo">333</span> private List<ServerName> getListOfReplicators0() throws KeeperException {<a name="line.333"></a> +<span class="sourceLineNo">334</span> return nullToEmpty(ZKUtil.listChildrenNoWatch(zookeeper, queuesZNode)).stream()<a name="line.334"></a> +<span class="sourceLineNo">335</span> .map(ServerName::parseServerName).collect(toList());<a name="line.335"></a> +<span class="sourceLineNo">336</span> }<a name="line.336"></a> +<span class="sourceLineNo">337</span><a name="line.337"></a> +<span class="sourceLineNo">338</span> @Override<a name="line.338"></a> +<span class="sourceLineNo">339</span> public List<ServerName> getListOfReplicators() throws ReplicationException {<a name="line.339"></a> +<span class="sourceLineNo">340</span> try {<a name="line.340"></a> +<span class="sourceLineNo">341</span> return getListOfReplicators0();<a name="line.341"></a> +<span class="sourceLineNo">342</span> } catch (KeeperException e) {<a name="line.342"></a> +<span class="sourceLineNo">343</span> throw new ReplicationException("Failed to get list of replicators", e);<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> private List<String> getWALsInQueue0(ServerName serverName, String queueId)<a name="line.347"></a> +<span class="sourceLineNo">348</span> throws KeeperException {<a name="line.348"></a> +<span class="sourceLineNo">349</span> return nullToEmpty(ZKUtil.listChildrenNoWatch(zookeeper, getQueueNode(serverName, queueId)));<a name="line.349"></a> +<span class="sourceLineNo">350</span> }<a name="line.350"></a> +<span class="sourceLineNo">351</span><a name="line.351"></a> +<span class="sourceLineNo">352</span> @Override<a name="line.352"></a> +<span class="sourceLineNo">353</span> public List<String> getWALsInQueue(ServerName serverName, String queueId)<a name="line.353"></a> +<span class="sourceLineNo">354</span> throws ReplicationException {<a name="line.354"></a> +<span class="sourceLineNo">355</span> try {<a name="line.355"></a> +<span class="sourceLineNo">356</span> return getWALsInQueue0(serverName, queueId);<a name="line.356"></a> +<span class="sourceLineNo">357</span> } catch (KeeperException e) {<a name="line.357"></a> +<span class="sourceLineNo">358</span> throw new ReplicationException(<a name="line.358"></a> +<span class="sourceLineNo">359</span> "Failed to get wals in queue (serverName=" + serverName + ", queueId=" + queueId + ")",<a name="line.359"></a> +<span class="sourceLineNo">360</span> e);<a name="line.360"></a> +<span class="sourceLineNo">361</span> }<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> private List<String> getAllQueues0(ServerName serverName) throws KeeperException {<a name="line.364"></a> +<span class="sourceLineNo">365</span> return nullToEmpty(ZKUtil.listChildrenNoWatch(zookeeper, getRsNode(serverName)));<a name="line.365"></a> +<span class="sourceLineNo">366</span> }<a name="line.366"></a> +<span class="sourceLineNo">367</span><a name="line.367"></a> +<span class="sourceLineNo">368</span> @Override<a name="line.368"></a> +<span class="sourceLineNo">369</span> public List<String> getAllQueues(ServerName serverName) throws ReplicationException {<a name="line.369"></a> +<span class="sourceLineNo">370</span> try {<a name="line.370"></a> +<span class="sourceLineNo">371</span> return getAllQueues0(serverName);<a name="line.371"></a> +<span class="sourceLineNo">372</span> } catch (KeeperException e) {<a name="line.372"></a> +<span class="sourceLineNo">373</span> throw new ReplicationException("Failed to get all queues (serverName=" + serverName + ")", 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><a name="line.376"></a> +<span class="sourceLineNo">377</span> // will be overridden in UTs<a name="line.377"></a> +<span class="sourceLineNo">378</span> @VisibleForTesting<a name="line.378"></a> +<span class="sourceLineNo">379</span> protected int getQueuesZNodeCversion() throws KeeperException {<a name="line.379"></a> +<span class="sourceLineNo">380</span> Stat stat = new Stat();<a name="line.380"></a> +<span class="sourceLineNo">381</span> ZKUtil.getDataNoWatch(this.zookeeper, this.queuesZNode, stat);<a name="line.381"></a> +<span class="sourceLineNo">382</span> return stat.getCversion();<a name="line.382"></a> +<span class="sourceLineNo">383</span> }<a name="line.383"></a> +<span class="sourceLineNo">384</span><a name="line.384"></a> +<span class="sourceLineNo">385</span> @Override<a name="line.385"></a> +<span class="sourceLineNo">386</span> public Set<String> getAllWALs() throws ReplicationException {<a name="line.386"></a> +<span class="sourceLineNo">387</span> try {<a name="line.387"></a> +<span class="sourceLineNo">388</span> for (int retry = 0;; retry++) {<a name="line.388"></a> +<span class="sourceLineNo">389</span> int v0 = getQueuesZNodeCversion();<a name="line.389"></a> +<span class="sourceLineNo">390</span> List<ServerName> rss = getListOfReplicators0();<a name="line.390"></a> +<span class="sourceLineNo">391</span> if (rss.isEmpty()) {<a name="line.391"></a> +<span class="sourceLineNo">392</span> LOG.debug("Didn't find a RegionServer that replicates, won't prevent deletions.");<a name="line.392"></a> +<span class="sourceLineNo">393</span> return Collections.emptySet();<a name="line.393"></a> +<span class="sourceLineNo">394</span> }<a name="line.394"></a> +<span class="sourceLineNo">395</span> Set<String> wals = new HashSet<>();<a 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ZNodePaths.joinZNode(peerNode, fileName);<a name="line.418"></a> +<span class="sourceLineNo">419</span> }<a name="line.419"></a> +<span class="sourceLineNo">420</span><a name="line.420"></a> +<span class="sourceLineNo">421</span> @Override<a name="line.421"></a> +<span class="sourceLineNo">422</span> public void addPeerToHFileRefs(String peerId) throws ReplicationException {<a name="line.422"></a> +<span class="sourceLineNo">423</span> String peerNode = getHFileRefsPeerNode(peerId);<a name="line.423"></a> +<span class="sourceLineNo">424</span> try {<a name="line.424"></a> +<span class="sourceLineNo">425</span> if (ZKUtil.checkExists(zookeeper, peerNode) == -1) {<a name="line.425"></a> +<span class="sourceLineNo">426</span> LOG.info("Adding peer {} to hfile reference queue.", peerId);<a name="line.426"></a> +<span class="sourceLineNo">427</span> ZKUtil.createWithParents(zookeeper, peerNode);<a name="line.427"></a> +<span class="sourceLineNo">428</span> }<a name="line.428"></a> +<span class="sourceLineNo">429</span> } catch (KeeperException e) {<a name="line.429"></a> +<span class="sourceLineNo">430</span> throw new ReplicationException("Failed to add peer " + peerId + " to hfile reference queue.",<a name="line.430"></a> +<span class="sourceLineNo">431</span> e);<a name="line.431"></a> +<span class="sourceLineNo">432</span> }<a name="line.432"></a> +<span class="sourceLineNo">433</span> }<a name="line.433"></a> +<span class="sourceLineNo">434</span><a name="line.434"></a> +<span class="sourceLineNo">435</span> @Override<a name="line.435"></a> +<span class="sourceLineNo">436</span> public void removePeerFromHFileRefs(String peerId) throws ReplicationException {<a name="line.436"></a> +<span class="sourceLineNo">437</span> String peerNode = getHFileRefsPeerNode(peerId);<a name="line.437"></a> +<span class="sourceLineNo">438</span> try {<a name="line.438"></a> +<span class="sourceLineNo">439</span> if (ZKUtil.checkExists(zookeeper, peerNode) == -1) {<a 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class="sourceLineNo">450</span><a name="line.450"></a> +<span class="sourceLineNo">451</span> @Override<a name="line.451"></a> +<span class="sourceLineNo">452</span> public void addHFileRefs(String peerId, List<Pair<Path, Path>> pairs)<a name="line.452"></a> +<span class="sourceLineNo">453</span> throws ReplicationException {<a name="line.453"></a> +<span class="sourceLineNo">454</span> String peerNode = getHFileRefsPeerNode(peerId);<a name="line.454"></a> +<span class="sourceLineNo">455</span> LOG.debug("Adding hfile references {} in queue {}", pairs, peerNode);<a name="line.455"></a> +<span class="sourceLineNo">456</span> List<ZKUtilOp> listOfOps = pairs.stream().map(p -> p.getSecond().getName())<a name="line.456"></a> +<span class="sourceLineNo">457</span> .map(n -> getHFileNode(peerNode, n))<a name="line.457"></a> +<span class="sourceLineNo">458</span> .map(f -> ZKUtilOp.createAndFailSilent(f, HConstants.EMPTY_BYTE_ARRAY)).collect(toList());<a name="line.458"></a> +<span class="sourceLineNo">459</span> LOG.debug("The multi list size for adding hfile references in zk for node {} is {}",<a name="line.459"></a> +<span class="sourceLineNo">460</span> peerNode, listOfOps.size());<a name="line.460"></a> +<span class="sourceLineNo">461</span> try {<a name="line.461"></a> +<span class="sourceLineNo">462</span> ZKUtil.multiOrSequential(this.zookeeper, listOfOps, true);<a name="line.462"></a> +<span class="sourceLineNo">463</span> } catch (KeeperException e) {<a name="line.463"></a> +<span class="sourceLineNo">464</span> throw new ReplicationException("Failed to add hfile reference to peer " + peerId, e);<a name="line.464"></a> +<span class="sourceLineNo">465</span> }<a name="line.465"></a> +<span class="sourceLineNo">466</span> }<a name="line.466"></a> +<span class="sourceLineNo">467</span><a name="line.467"></a> +<span class="sourceLineNo">468</span> @Override<a name="line.468"></a> +<span class="sourceLineNo">469</span> public void removeHFileRefs(String peerId, List<String> files) throws ReplicationException {<a name="line.469"></a> +<span class="sourceLineNo">470</span> String peerNode = getHFileRefsPeerNode(peerId);<a name="line.470"></a> +<span class="sourceLineNo">471</span> LOG.debug("Removing hfile references {} from queue {}", files, peerNode);<a name="line.471"></a> +<span class="sourceLineNo">472</span><a name="line.472"></a> +<span class="sourceLineNo">473</span> List<ZKUtilOp> listOfOps = files.stream().map(n -> getHFileNode(peerNode, n))<a name="line.473"></a> +<span class="sourceLineNo">474</span> .map(ZKUtilOp::deleteNodeFailSilent).collect(toList());<a name="line.474"></a> +<span class="sourceLineNo">475</span> LOG.debug("The multi list size for removing hfile references in zk for node {} is {}",<a name="line.475"></a> +<span class="sourceLineNo">476</span> peerNode, listOfOps.size());<a name="line.476"></a> +<span class="sourceLineNo">477</span> try {<a name="line.477"></a> +<span class="sourceLineNo">478</span> ZKUtil.multiOrSequential(this.zookeeper, listOfOps, true);<a name="line.478"></a> +<span class="sourceLineNo">479</span> } catch (KeeperException e) {<a name="line.479"></a> +<span class="sourceLineNo">480</span> throw new ReplicationException("Failed to remove hfile reference from peer " + peerId, e);<a name="line.480"></a> +<span class="sourceLineNo">481</span> }<a name="line.481"></a> +<span class="sourceLineNo">482</span> }<a name="line.482"></a> +<span class="sourceLineNo">483</span><a name="line.483"></a> +<span class="sourceLineNo">484</span> private List<String> getAllPeersFromHFileRefsQueue0() throws KeeperException {<a name="line.484"></a> +<span class="sourceLineNo">485</span> return nullToEmpty(ZKUtil.listChildrenNoWatch(zookeeper, hfileRefsZNode));<a name="line.485"></a> +<span class="sourceLineNo">486</span> }<a name="line.486"></a> +<span class="sourceLineNo">487</span><a name="line.487"></a> +<span class="sourceLineNo">488</span> @Override<a name="line.488"></a> +<span class="sourceLineNo">489</span> public List<String> getAllPeersFromHFileRefsQueue() throws ReplicationException {<a name="line.489"></a> +<span class="sourceLineNo">490</span> try {<a name="line.490"></a> +<span class="sourceLineNo">491</span> return getAllPeersFromHFileRefsQueue0();<a name="line.491"></a> +<span class="sourceLineNo">492</span> } catch (KeeperException e) {<a name="line.492"></a> +<span class="sourceLineNo">493</span> throw new ReplicationException("Failed to get list of all peers in hfile references node.",<a name="line.493"></a> +<span class="sourceLineNo">494</span> e);<a name="line.494"></a> +<span class="sourceLineNo">495</span> }<a name="line.495"></a> +<span class="sourceLineNo">496</span> }<a name="line.496"></a> +<span class="sourceLineNo">497</span><a name="line.497"></a> +<span class="sourceLineNo">498</span> private List<String> getReplicableHFiles0(String peerId) throws KeeperException {<a name="line.498"></a> +<span class="sourceLineNo">499</span> return nullToEmpty(ZKUtil.listChildrenNoWatch(this.zookeeper, getHFileRefsPeerNode(peerId)));<a name="line.499"></a> +<span class="sourceLineNo">500</span> }<a name="line.500"></a> +<span class="sourceLineNo">501</span><a name="line.501"></a> +<span class="sourceLineNo">502</span> @Override<a name="line.502"></a> +<span class="sourceLineNo">503</span> public List<String> getReplicableHFiles(String peerId) throws ReplicationException {<a name="line.503"></a> +<span class="sourceLineNo">504</span> try {<a name="line.504"></a> +<span class="sourceLineNo">505</span> return getReplicableHFiles0(peerId);<a name="line.505"></a> +<span class="sourceLineNo">506</span> } catch (KeeperException e) {<a name="line.506"></a> +<span class="sourceLineNo">507</span> throw new ReplicationException("Failed to get list of hfile references for peer " + peerId,<a name="line.507"></a> +<span class="sourceLineNo">508</span> e);<a name="line.508"></a> +<span class="sourceLineNo">509</span> }<a name="line.509"></a> +<span class="sourceLineNo">510</span> }<a name="line.510"></a> +<span class="sourceLineNo">511</span><a name="line.511"></a> +<span class="sourceLineNo">512</span> // will be overridden in UTs<a name="line.512"></a> +<span class="sourceLineNo">513</span> @VisibleForTesting<a name="line.513"></a> +<span class="sourceLineNo">514</span> protected int getHFileRefsZNodeCversion() throws ReplicationException {<a name="line.514"></a> +<span class="sourceLineNo">515</span> Stat stat = new Stat();<a name="line.515"></a> +<span class="sourceLineNo">516</span> try {<a name="line.516"></a> +<span class="sourceLineNo">517</span> ZKUtil.getDataNoWatch(zookeeper, hfileRefsZNode, stat);<a name="line.517"></a> +<span class="sourceLineNo">518</span> } catch (KeeperException e) {<a name="line.518"></a> +<span class="sourceLineNo">519</span> throw new ReplicationException("Failed to get stat of replication hfile references node.", e);<a name="line.519"></a> +<span class="sourceLineNo">520</span> }<a name="line.520"></a> +<span class="sourceLineNo">521</span> return stat.getCversion();<a name="line.521"></a> +<span class="sourceLineNo">522</span> }<a name="line.522"></a> +<span class="sourceLineNo">523</span><a name="line.523"></a> +<span class="sourceLineNo">524</span> @Override<a name="line.524"></a> +<span class="sourceLineNo">525</span> public Set<String> getAllHFileRefs() throws ReplicationException {<a name="line.525"></a> +<span class="sourceLineNo">526</span> try {<a name="line.526"></a> +<span class="sourceLineNo">527</span> for (int retry = 0;; retry++) {<a name="line.527"></a> +<span class="sourceLineNo">528</span> int v0 = getHFileRefsZNodeCversion();<a name="line.528"></a> +<span class="sourceLineNo">529</span> List<String> peers = getAllPeersFromHFileRefsQueue();<a name="line.529"></a> +<span class="sourceLineNo">530</span> if (peers.isEmpty()) {<a name="line.530"></a> +<span class="sourceLineNo">531</span> LOG.debug("Didn't find any peers with hfile references, won't prevent deletions.");<a name="line.531"></a> +<span class="sourceLineNo">532</span> return Collections.emptySet();<a name="line.532"></a> +<span class="sourceLineNo">533</span> }<a name="line.533"></a> +<span class="sourceLineNo">534</span> Set<String> hfileRefs = new HashSet<>();<a name="line.534"></a> +<span class="sourceLineNo">535</span> for (String peer : peers) {<a name="line.535"></a> +<span class="sourceLineNo">536</span> hfileRefs.addAll(getReplicableHFiles0(peer));<a name="line.536"></a> +<span class="sourceLineNo">537</span> }<a name="line.537"></a> +<span class="sourceLineNo">538</span> int v1 = getHFileRefsZNodeCversion();<a name="line.538"></a> +<span class="sourceLineNo">539</span> if (v0 == v1) {<a name="line.539"></a> +<span class="sourceLineNo">540</span> return hfileRefs;<a name="line.540"></a> +<span class="sourceLineNo">541</span> }<a name="line.541"></a> +<span class="sourceLineNo">542</span> LOG.debug("Replication hfile references node cversion changed from %d to %d, retry = %d",<a name="line.542"></a> +<span class="sourceLineNo">543</span> v0, v1, retry);<a name="line.543"></a> +<span class="sourceLineNo">544</span> }<a name="line.544"></a> +<span class="sourceLineNo">545</span> } catch (KeeperException e) {<a name="line.545"></a> +<span class="sourceLineNo">546</span> throw new ReplicationException("Failed to get all hfile refs", e);<a name="line.546"></a> +<span class="sourceLineNo">547</span> }<a name="line.547"></a> +<span class="sourceLineNo">548</span> }<a name="line.548"></a> +<span class="sourceLineNo">549</span>}<a name="line.549"></a>
