http://git-wip-us.apache.org/repos/asf/hbase-site/blob/37b8a04a/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html b/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html index 55713d8..de7bd4a 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/replication/ZKReplicationQueueStorage.html @@ -126,564 +126,565 @@ <span class="sourceLineNo">118</span> .get(ZOOKEEPER_ZNODE_REPLICATION_REGIONS_KEY, ZOOKEEPER_ZNODE_REPLICATION_REGIONS_DEFAULT));<a name="line.118"></a> <span class="sourceLineNo">119</span> }<a name="line.119"></a> <span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> private String getRsNode(ServerName serverName) {<a name="line.121"></a> -<span class="sourceLineNo">122</span> return ZNodePaths.joinZNode(queuesZNode, serverName.getServerName());<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> private String getQueueNode(ServerName serverName, String queueId) {<a name="line.125"></a> -<span class="sourceLineNo">126</span> return ZNodePaths.joinZNode(getRsNode(serverName), queueId);<a name="line.126"></a> -<span class="sourceLineNo">127</span> }<a name="line.127"></a> -<span class="sourceLineNo">128</span><a name="line.128"></a> -<span class="sourceLineNo">129</span> private String getFileNode(String queueNode, String fileName) {<a name="line.129"></a> -<span class="sourceLineNo">130</span> return ZNodePaths.joinZNode(queueNode, fileName);<a name="line.130"></a> -<span class="sourceLineNo">131</span> }<a name="line.131"></a> -<span class="sourceLineNo">132</span><a name="line.132"></a> -<span class="sourceLineNo">133</span> private String getFileNode(ServerName serverName, String queueId, String fileName) {<a name="line.133"></a> -<span class="sourceLineNo">134</span> return getFileNode(getQueueNode(serverName, queueId), fileName);<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> /**<a name="line.137"></a> -<span class="sourceLineNo">138</span> * <p><a name="line.138"></a> -<span class="sourceLineNo">139</span> * Put all regions under /hbase/replication/regions znode will lead to too many children because<a name="line.139"></a> -<span class="sourceLineNo">140</span> * of the huge number of regions in real production environment. 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path.lastIndexOf(ZNodePaths.ZNODE_PATH_SEPARATOR)));<a name="line.216"></a> -<span class="sourceLineNo">217</span> listOfOps.add(ZKUtilOp.createAndFailSilent(path, data));<a name="line.217"></a> -<span class="sourceLineNo">218</span> continue;<a name="line.218"></a> -<span class="sourceLineNo">219</span> }<a name="line.219"></a> -<span class="sourceLineNo">220</span> // Perform CAS in a specific version v0 (HBASE-20138)<a name="line.220"></a> -<span class="sourceLineNo">221</span> int v0 = p.getSecond();<a name="line.221"></a> -<span class="sourceLineNo">222</span> long lastPushedSeqId = p.getFirst();<a name="line.222"></a> -<span class="sourceLineNo">223</span> if (lastSeqEntry.getValue() <= lastPushedSeqId) {<a name="line.223"></a> -<span class="sourceLineNo">224</span> continue;<a name="line.224"></a> -<span class="sourceLineNo">225</span> }<a name="line.225"></a> -<span class="sourceLineNo">226</span> listOfOps.add(ZKUtilOp.setData(path, data, v0));<a name="line.226"></a> -<span 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class="sourceLineNo">568</span> LOG.info("Removing peer {} from hfile reference queue.", peerNode);<a name="line.568"></a> -<span class="sourceLineNo">569</span> ZKUtil.deleteNodeRecursively(zookeeper, peerNode);<a name="line.569"></a> -<span class="sourceLineNo">570</span> }<a name="line.570"></a> -<span class="sourceLineNo">571</span> } catch (KeeperException e) {<a name="line.571"></a> -<span class="sourceLineNo">572</span> throw new ReplicationException(<a name="line.572"></a> -<span class="sourceLineNo">573</span> "Failed to remove peer " + peerId + " from hfile reference queue.", e);<a name="line.573"></a> -<span class="sourceLineNo">574</span> }<a name="line.574"></a> -<span class="sourceLineNo">575</span> }<a name="line.575"></a> -<span class="sourceLineNo">576</span><a name="line.576"></a> -<span class="sourceLineNo">577</span> @Override<a name="line.577"></a> -<span class="sourceLineNo">578</span> public void addHFileRefs(String peerId, List<Pair<Path, Path>> pairs)<a name="line.578"></a> -<span class="sourceLineNo">579</span> throws ReplicationException {<a name="line.579"></a> -<span class="sourceLineNo">580</span> String peerNode = getHFileRefsPeerNode(peerId);<a name="line.580"></a> -<span class="sourceLineNo">581</span> LOG.debug("Adding hfile references {} in queue {}", pairs, peerNode);<a name="line.581"></a> -<span class="sourceLineNo">582</span> List<ZKUtilOp> listOfOps = pairs.stream().map(p -> p.getSecond().getName())<a name="line.582"></a> -<span class="sourceLineNo">583</span> .map(n -> getHFileNode(peerNode, n))<a name="line.583"></a> -<span class="sourceLineNo">584</span> .map(f -> ZKUtilOp.createAndFailSilent(f, HConstants.EMPTY_BYTE_ARRAY)).collect(toList());<a name="line.584"></a> -<span class="sourceLineNo">585</span> LOG.debug("The multi list size for adding hfile references in zk for node {} is {}",<a name="line.585"></a> -<span class="sourceLineNo">586</span> peerNode, listOfOps.size());<a name="line.586"></a> -<span 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characters 'dd' as the first level directory name, and use the next two characters '04' as the<a name="line.152"></a> +<span class="sourceLineNo">153</span> * second level directory name, and the rest part as the prefix of the znode, and the suffix '100'<a name="line.153"></a> +<span class="sourceLineNo">154</span> * is the peer id.<a name="line.154"></a> +<span class="sourceLineNo">155</span> * </p><a name="line.155"></a> +<span class="sourceLineNo">156</span> * @param encodedRegionName the encoded region name.<a name="line.156"></a> +<span class="sourceLineNo">157</span> * @param peerId peer id for replication.<a name="line.157"></a> +<span class="sourceLineNo">158</span> * @return ZNode path to persist the max sequence id that we've pushed for the given region and<a name="line.158"></a> +<span class="sourceLineNo">159</span> * peer.<a name="line.159"></a> +<span class="sourceLineNo">160</span> */<a name="line.160"></a> +<span class="sourceLineNo">161</span> @VisibleForTesting<a name="line.161"></a> +<span class="sourceLineNo">162</span> String getSerialReplicationRegionPeerNode(String encodedRegionName, String peerId) {<a name="line.162"></a> +<span class="sourceLineNo">163</span> if (encodedRegionName == null || encodedRegionName.length() != RegionInfo.MD5_HEX_LENGTH) {<a name="line.163"></a> +<span class="sourceLineNo">164</span> throw new IllegalArgumentException(<a name="line.164"></a> +<span class="sourceLineNo">165</span> "Invalid encoded region name: " + encodedRegionName + ", length should be 32.");<a name="line.165"></a> +<span class="sourceLineNo">166</span> }<a name="line.166"></a> +<span class="sourceLineNo">167</span> return new StringBuilder(regionsZNode).append(ZNodePaths.ZNODE_PATH_SEPARATOR)<a name="line.167"></a> +<span class="sourceLineNo">168</span> .append(encodedRegionName.substring(0, 2)).append(ZNodePaths.ZNODE_PATH_SEPARATOR)<a name="line.168"></a> +<span class="sourceLineNo">169</span> .append(encodedRegionName.substring(2, 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class="sourceLineNo">200</span> } catch (NoNodeException e) {<a name="line.200"></a> +<span class="sourceLineNo">201</span> LOG.warn("{} already deleted when removing log", fileNode);<a name="line.201"></a> +<span class="sourceLineNo">202</span> } catch (KeeperException e) {<a name="line.202"></a> +<span class="sourceLineNo">203</span> throw new ReplicationException("Failed to remove wal from queue (serverName=" + serverName +<a name="line.203"></a> +<span class="sourceLineNo">204</span> ", queueId=" + queueId + ", fileName=" + fileName + ")", e);<a name="line.204"></a> +<span class="sourceLineNo">205</span> }<a name="line.205"></a> +<span class="sourceLineNo">206</span> }<a name="line.206"></a> +<span class="sourceLineNo">207</span><a name="line.207"></a> +<span class="sourceLineNo">208</span> private void addLastSeqIdsToOps(String queueId, Map<String, Long> lastSeqIds,<a name="line.208"></a> +<span class="sourceLineNo">209</span> List<ZKUtilOp> listOfOps) throws KeeperException, ReplicationException {<a name="line.209"></a> +<span class="sourceLineNo">210</span> String peerId = new ReplicationQueueInfo(queueId).getPeerId();<a name="line.210"></a> +<span class="sourceLineNo">211</span> for (Entry<String, Long> lastSeqEntry : lastSeqIds.entrySet()) {<a name="line.211"></a> +<span class="sourceLineNo">212</span> String path = getSerialReplicationRegionPeerNode(lastSeqEntry.getKey(), peerId);<a name="line.212"></a> +<span class="sourceLineNo">213</span> Pair<Long, Integer> p = getLastSequenceIdWithVersion(lastSeqEntry.getKey(), peerId);<a name="line.213"></a> +<span class="sourceLineNo">214</span> byte[] data = ZKUtil.positionToByteArray(lastSeqEntry.getValue());<a name="line.214"></a> +<span class="sourceLineNo">215</span> if (p.getSecond() < 0) { // ZNode does not exist.<a name="line.215"></a> +<span class="sourceLineNo">216</span> ZKUtil.createWithParents(zookeeper,<a name="line.216"></a> +<span class="sourceLineNo">217</span> path.substring(0, path.lastIndexOf(ZNodePaths.ZNODE_PATH_SEPARATOR)));<a name="line.217"></a> +<span class="sourceLineNo">218</span> listOfOps.add(ZKUtilOp.createAndFailSilent(path, data));<a name="line.218"></a> +<span class="sourceLineNo">219</span> continue;<a name="line.219"></a> +<span class="sourceLineNo">220</span> }<a name="line.220"></a> +<span class="sourceLineNo">221</span> // Perform CAS in a specific version v0 (HBASE-20138)<a name="line.221"></a> +<span class="sourceLineNo">222</span> int v0 = p.getSecond();<a name="line.222"></a> +<span class="sourceLineNo">223</span> long lastPushedSeqId = p.getFirst();<a name="line.223"></a> +<span class="sourceLineNo">224</span> if (lastSeqEntry.getValue() <= lastPushedSeqId) {<a name="line.224"></a> +<span class="sourceLineNo">225</span> continue;<a name="line.225"></a> +<span class="sourceLineNo">226</span> }<a name="line.226"></a> +<span class="sourceLineNo">227</span> listOfOps.add(ZKUtilOp.setData(path, data, v0));<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> @Override<a name="line.231"></a> +<span class="sourceLineNo">232</span> public void setWALPosition(ServerName serverName, String queueId, String fileName, long position,<a name="line.232"></a> +<span class="sourceLineNo">233</span> Map<String, Long> lastSeqIds) throws ReplicationException {<a name="line.233"></a> +<span class="sourceLineNo">234</span> try {<a name="line.234"></a> +<span class="sourceLineNo">235</span> for (int retry = 0;; retry++) {<a name="line.235"></a> +<span class="sourceLineNo">236</span> List<ZKUtilOp> listOfOps = new ArrayList<>();<a name="line.236"></a> +<span class="sourceLineNo">237</span> if (position > 0) {<a name="line.237"></a> +<span class="sourceLineNo">238</span> listOfOps.add(ZKUtilOp.setData(getFileNode(serverName, queueId, 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(KeeperException.BadVersionException | KeeperException.NodeExistsException e) {<a name="line.249"></a> +<span class="sourceLineNo">250</span> LOG.warn(<a name="line.250"></a> +<span class="sourceLineNo">251</span> "Bad version(or node exist) when persist the last pushed sequence id to zookeeper storage, "<a name="line.251"></a> +<span class="sourceLineNo">252</span> + "Retry = " + retry + ", serverName=" + serverName + ", queueId=" + queueId<a name="line.252"></a> +<span class="sourceLineNo">253</span> + ", fileName=" + fileName);<a name="line.253"></a> +<span class="sourceLineNo">254</span> }<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> throw new ReplicationException("Failed to set log position (serverName=" + serverName<a name="line.257"></a> +<span class="sourceLineNo">258</span> + ", queueId=" + queueId + ", fileName=" + fileName + ", position=" + position + ")", e);<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> * Return the {lastPushedSequenceId, ZNodeDataVersion} pair. if ZNodeDataVersion is -1, it means<a name="line.263"></a> +<span class="sourceLineNo">264</span> * that the ZNode does not exist.<a name="line.264"></a> +<span class="sourceLineNo">265</span> */<a name="line.265"></a> +<span class="sourceLineNo">266</span> @VisibleForTesting<a name="line.266"></a> +<span class="sourceLineNo">267</span> protected Pair<Long, Integer> getLastSequenceIdWithVersion(String encodedRegionName,<a name="line.267"></a> +<span class="sourceLineNo">268</span> String peerId) throws KeeperException {<a name="line.268"></a> +<span class="sourceLineNo">269</span> Stat stat = new Stat();<a name="line.269"></a> +<span class="sourceLineNo">270</span> String path = getSerialReplicationRegionPeerNode(encodedRegionName, peerId);<a name="line.270"></a> +<span class="sourceLineNo">271</span> byte[] data = ZKUtil.getDataNoWatch(zookeeper, path, stat);<a name="line.271"></a> +<span class="sourceLineNo">272</span> if (data == null) {<a name="line.272"></a> +<span class="sourceLineNo">273</span> // ZNode does not exist, so just return version -1 to indicate that no node exist.<a name="line.273"></a> +<span class="sourceLineNo">274</span> return Pair.newPair(HConstants.NO_SEQNUM, -1);<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> return Pair.newPair(ZKUtil.parseWALPositionFrom(data), stat.getVersion());<a name="line.277"></a> +<span class="sourceLineNo">278</span> } catch (DeserializationException de) {<a name="line.278"></a> +<span class="sourceLineNo">279</span> LOG.warn("Failed to parse log position (region=" + encodedRegionName + ", peerId=" + peerId<a name="line.279"></a> +<span class="sourceLineNo">280</span> + "), data=" + Bytes.toStringBinary(data));<a name="line.280"></a> +<span class="sourceLineNo">281</span> }<a name="line.281"></a> +<span class="sourceLineNo">282</span> return Pair.newPair(HConstants.NO_SEQNUM, stat.getVersion());<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> @Override<a name="line.285"></a> +<span class="sourceLineNo">286</span> public long getLastSequenceId(String encodedRegionName, String peerId)<a name="line.286"></a> +<span class="sourceLineNo">287</span> throws ReplicationException {<a name="line.287"></a> +<span class="sourceLineNo">288</span> try {<a name="line.288"></a> +<span class="sourceLineNo">289</span> return getLastSequenceIdWithVersion(encodedRegionName, peerId).getFirst();<a name="line.289"></a> +<span class="sourceLineNo">290</span> } catch (KeeperException e) {<a name="line.290"></a> +<span class="sourceLineNo">291</span> throw new ReplicationException("Failed to get last pushed sequence id (encodedRegionName="<a name="line.291"></a> +<span class="sourceLineNo">292</span> + encodedRegionName + ", peerId=" + peerId + ")", e);<a name="line.292"></a> +<span class="sourceLineNo">293</span> }<a name="line.293"></a> +<span class="sourceLineNo">294</span> }<a name="line.294"></a> +<span class="sourceLineNo">295</span><a name="line.295"></a> +<span class="sourceLineNo">296</span> @Override<a name="line.296"></a> +<span class="sourceLineNo">297</span> public void setLastSequenceIds(String peerId, Map<String, Long> lastSeqIds)<a name="line.297"></a> +<span class="sourceLineNo">298</span> throws ReplicationException {<a name="line.298"></a> +<span class="sourceLineNo">299</span> try {<a name="line.299"></a> +<span class="sourceLineNo">300</span> // No need CAS and retry here, because it'll call setLastSequenceIds() for disabled peers<a name="line.300"></a> +<span class="sourceLineNo">301</span> // only, so no conflict happen.<a name="line.301"></a> +<span class="sourceLineNo">302</span> List<ZKUtilOp> listOfOps = new ArrayList<>();<a name="line.302"></a> +<span class="sourceLineNo">303</span> for (Entry<String, Long> lastSeqEntry : lastSeqIds.entrySet()) {<a name="line.303"></a> +<span class="sourceLineNo">304</span> String path = getSerialReplicationRegionPeerNode(lastSeqEntry.getKey(), peerId);<a name="line.304"></a> +<span class="sourceLineNo">305</span> ZKUtil.createWithParents(zookeeper, path);<a name="line.305"></a> +<span class="sourceLineNo">306</span> listOfOps.add(ZKUtilOp.setData(path, ZKUtil.positionToByteArray(lastSeqEntry.getValue())));<a name="line.306"></a> +<span class="sourceLineNo">307</span> }<a name="line.307"></a> +<span class="sourceLineNo">308</span> if (!listOfOps.isEmpty()) {<a name="line.308"></a> +<span class="sourceLineNo">309</span> ZKUtil.multiOrSequential(zookeeper, listOfOps, true);<a name="line.309"></a> +<span class="sourceLineNo">310</span> }<a name="line.310"></a> +<span class="sourceLineNo">311</span> } catch (KeeperException e) {<a name="line.311"></a> +<span class="sourceLineNo">312</span> throw new ReplicationException("Failed to set last sequence ids, peerId=" + peerId<a name="line.312"></a> +<span class="sourceLineNo">313</span> + ", size of lastSeqIds=" + lastSeqIds.size(), e);<a name="line.313"></a> +<span class="sourceLineNo">314</span> }<a name="line.314"></a> +<span class="sourceLineNo">315</span> }<a name="line.315"></a> +<span class="sourceLineNo">316</span><a name="line.316"></a> +<span class="sourceLineNo">317</span> @Override<a name="line.317"></a> +<span class="sourceLineNo">318</span> public void removeLastSequenceIds(String peerId) throws ReplicationException {<a name="line.318"></a> +<span class="sourceLineNo">319</span> String suffix = "-" + peerId;<a name="line.319"></a> +<span class="sourceLineNo">320</span> try {<a name="line.320"></a> +<span class="sourceLineNo">321</span> StringBuilder sb = new StringBuilder(regionsZNode);<a name="line.321"></a> +<span class="sourceLineNo">322</span> int regionsZNodeLength = regionsZNode.length();<a name="line.322"></a> +<span class="sourceLineNo">323</span> int levelOneLength = regionsZNodeLength + 3;<a name="line.323"></a> +<span class="sourceLineNo">324</span> int levelTwoLength = levelOneLength + 3;<a name="line.324"></a> +<span class="sourceLineNo">325</span> List<String> levelOneDirs = ZKUtil.listChildrenNoWatch(zookeeper, regionsZNode);<a name="line.325"></a> +<span class="sourceLineNo">326</span> // it is possible that levelOneDirs is null if we haven't write any last pushed sequence ids<a name="line.326"></a> +<span class="sourceLineNo">327</span> // yet, so we need an extra check here.<a name="line.327"></a> +<span class="sourceLineNo">328</span> if (CollectionUtils.isEmpty(levelOneDirs)) {<a name="line.328"></a> +<span class="sourceLineNo">329</span> return;<a name="line.329"></a> +<span class="sourceLineNo">330</span> }<a name="line.330"></a> +<span class="sourceLineNo">331</span> for (String levelOne : levelOneDirs) {<a name="line.331"></a> +<span class="sourceLineNo">332</span> sb.append(ZNodePaths.ZNODE_PATH_SEPARATOR).append(levelOne);<a name="line.332"></a> +<span class="sourceLineNo">333</span> for (String levelTwo : ZKUtil.listChildrenNoWatch(zookeeper, sb.toString())) {<a name="line.333"></a> +<span class="sourceLineNo">334</span> sb.append(ZNodePaths.ZNODE_PATH_SEPARATOR).append(levelTwo);<a name="line.334"></a> +<span class="sourceLineNo">335</span> for (String znode : ZKUtil.listChildrenNoWatch(zookeeper, sb.toString())) {<a name="line.335"></a> +<span class="sourceLineNo">336</span> if (znode.endsWith(suffix)) {<a name="line.336"></a> +<span class="sourceLineNo">337</span> sb.append(ZNodePaths.ZNODE_PATH_SEPARATOR).append(znode);<a name="line.337"></a> +<span class="sourceLineNo">338</span> ZKUtil.deleteNode(zookeeper, sb.toString());<a name="line.338"></a> +<span class="sourceLineNo">339</span> sb.setLength(levelTwoLength);<a name="line.339"></a> +<span class="sourceLineNo">340</span> }<a name="line.340"></a> +<span class="sourceLineNo">341</span> }<a name="line.341"></a> +<span class="sourceLineNo">342</span> sb.setLength(levelOneLength);<a name="line.342"></a> +<span class="sourceLineNo">343</span> }<a name="line.343"></a> +<span class="sourceLineNo">344</span> sb.setLength(regionsZNodeLength);<a name="line.344"></a> +<span class="sourceLineNo">345</span> }<a name="line.345"></a> +<span class="sourceLineNo">346</span> } catch (KeeperException e) {<a name="line.346"></a> +<span class="sourceLineNo">347</span> throw new ReplicationException("Failed to remove all last sequence ids, peerId=" + peerId, e);<a 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ZKUtil.multiOrSequential(zookeeper, listOfOps, true);<a name="line.358"></a> +<span class="sourceLineNo">359</span> } catch (KeeperException e) {<a name="line.359"></a> +<span class="sourceLineNo">360</span> throw new ReplicationException("Failed to remove last sequence ids, peerId=" + peerId +<a name="line.360"></a> +<span class="sourceLineNo">361</span> ", encodedRegionNames.size=" + encodedRegionNames.size(), e);<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><a name="line.364"></a> +<span class="sourceLineNo">365</span> @Override<a name="line.365"></a> +<span class="sourceLineNo">366</span> public long getWALPosition(ServerName serverName, String queueId, String fileName)<a name="line.366"></a> +<span class="sourceLineNo">367</span> throws ReplicationException {<a name="line.367"></a> +<span class="sourceLineNo">368</span> byte[] bytes;<a name="line.368"></a> +<span class="sourceLineNo">369</span> try {<a name="line.369"></a> +<span class="sourceLineNo">370</span> bytes = ZKUtil.getData(zookeeper, getFileNode(serverName, queueId, fileName));<a name="line.370"></a> +<span class="sourceLineNo">371</span> } catch (KeeperException | InterruptedException e) {<a name="line.371"></a> +<span class="sourceLineNo">372</span> throw new ReplicationException("Failed to get log position (serverName=" + serverName +<a name="line.372"></a> +<span class="sourceLineNo">373</span> ", queueId=" + queueId + ", fileName=" + fileName + ")", e);<a name="line.373"></a> +<span class="sourceLineNo">374</span> }<a name="line.374"></a> +<span class="sourceLineNo">375</span> try {<a name="line.375"></a> +<span class="sourceLineNo">376</span> return ZKUtil.parseWALPositionFrom(bytes);<a name="line.376"></a> +<span class="sourceLineNo">377</span> } catch (DeserializationException de) {<a name="line.377"></a> +<span class="sourceLineNo">378</span> LOG.warn("Failed parse log position (serverName={}, queueId={}, fileName={})",<a name="line.378"></a> +<span class="sourceLineNo">379</span> serverName, queueId, fileName);<a name="line.379"></a> +<span class="sourceLineNo">380</span> }<a name="line.380"></a> +<span class="sourceLineNo">381</span> // if we can not parse the position, start at the beginning of the wal file again<a name="line.381"></a> +<span class="sourceLineNo">382</span> return 0;<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 Pair<String, SortedSet<String>> claimQueue(ServerName sourceServerName, String queueId,<a name="line.386"></a> +<span class="sourceLineNo">387</span> ServerName destServerName) throws ReplicationException {<a name="line.387"></a> +<span class="sourceLineNo">388</span> LOG.info("Atomically moving {}/{}'s WALs to {}", sourceServerName, queueId, destServerName);<a name="line.388"></a> +<span class="sourceLineNo">389</span> try {<a name="line.389"></a> +<span class="sourceLineNo">390</span> ZKUtil.createWithParents(zookeeper, getRsNode(destServerName));<a name="line.390"></a> +<span class="sourceLineNo">391</span> } catch (KeeperException e) {<a name="line.391"></a> +<span class="sourceLineNo">392</span> throw new ReplicationException(<a name="line.392"></a> +<span class="sourceLineNo">393</span> "Claim queue queueId=" + queueId + " from " + sourceServerName + " to " + destServerName +<a name="line.393"></a> +<span class="sourceLineNo">394</span> " failed when creating the node for " + destServerName,<a name="line.394"></a> +<span class="sourceLineNo">395</span> e);<a name="line.395"></a> +<span class="sourceLineNo">396</span> }<a name="line.396"></a> +<span class="sourceLineNo">397</span> String newQueueId = queueId + "-" + sourceServerName;<a name="line.397"></a> +<span class="sourceLineNo">398</span> try {<a name="line.398"></a> +<span class="sourceLineNo">399</span> String oldQueueNode = getQueueNode(sourceServerName, queueId);<a name="line.399"></a> +<span class="sourceLineNo">400</span> List<String> wals = ZKUtil.listChildrenNoWatch(zookeeper, oldQueueNode);<a name="line.400"></a> +<span class="sourceLineNo">401</span> if (CollectionUtils.isEmpty(wals)) {<a name="line.401"></a> +<span class="sourceLineNo">402</span> ZKUtil.deleteNodeFailSilent(zookeeper, oldQueueNode);<a name="line.402"></a> +<span class="sourceLineNo">403</span> LOG.info("Removed empty {}/{}", sourceServerName, queueId);<a name="line.403"></a> +<span class="sourceLineNo">404</span> return new Pair<>(newQueueId, Collections.emptySortedSet());<a name="line.404"></a> +<span class="sourceLineNo">405</span> }<a name="line.405"></a> +<span class="sourceLineNo">406</span> String newQueueNode = getQueueNode(destServerName, newQueueId);<a name="line.406"></a> 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<TRUNCATED>
