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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/05/24 14:48:34 UTC
[14/51] [partial] hbase-site git commit: Published site at
f3d1c021de2264301f68eadb9ef126ff83d7ef53.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/883dde2f/devapidocs/src-html/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.html b/devapidocs/src-html/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.html
index e768c9f..5aa1703 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.html
@@ -208,256 +208,273 @@
<span class="sourceLineNo">200</span> for (RegionInfo region : regions.keySet()) {<a name="line.200"></a>
<span class="sourceLineNo">201</span> if (!misplacedRegions.contains(region)) {<a name="line.201"></a>
<span class="sourceLineNo">202</span> String groupName = rsGroupInfoManager.getRSGroupOfTable(region.getTable());<a name="line.202"></a>
-<span class="sourceLineNo">203</span> groupToRegion.put(groupName, region);<a name="line.203"></a>
-<span class="sourceLineNo">204</span> }<a name="line.204"></a>
-<span class="sourceLineNo">205</span> }<a name="line.205"></a>
-<span class="sourceLineNo">206</span> // Now the "groupToRegion" map has only the regions which have correct<a name="line.206"></a>
-<span class="sourceLineNo">207</span> // assignments.<a name="line.207"></a>
-<span class="sourceLineNo">208</span> for (String key : groupToRegion.keySet()) {<a name="line.208"></a>
-<span class="sourceLineNo">209</span> Map<RegionInfo, ServerName> currentAssignmentMap = new TreeMap<RegionInfo, ServerName>();<a name="line.209"></a>
-<span class="sourceLineNo">210</span> List<RegionInfo> regionList = groupToRegion.get(key);<a name="line.210"></a>
-<span class="sourceLineNo">211</span> RSGroupInfo info = rsGroupInfoManager.getRSGroup(key);<a name="line.211"></a>
-<span class="sourceLineNo">212</span> List<ServerName> candidateList = filterOfflineServers(info, servers);<a name="line.212"></a>
-<span class="sourceLineNo">213</span> for (RegionInfo region : regionList) {<a name="line.213"></a>
-<span class="sourceLineNo">214</span> currentAssignmentMap.put(region, regions.get(region));<a name="line.214"></a>
-<span class="sourceLineNo">215</span> }<a name="line.215"></a>
-<span class="sourceLineNo">216</span> if(candidateList.size() > 0) {<a name="line.216"></a>
-<span class="sourceLineNo">217</span> assignments.putAll(this.internalBalancer.retainAssignment(<a name="line.217"></a>
-<span class="sourceLineNo">218</span> currentAssignmentMap, candidateList));<a name="line.218"></a>
+<span class="sourceLineNo">203</span> if (groupName == null) {<a name="line.203"></a>
+<span class="sourceLineNo">204</span> LOG.info("Group not found for table " + region.getTable() + ", using default");<a name="line.204"></a>
+<span class="sourceLineNo">205</span> groupName = RSGroupInfo.DEFAULT_GROUP;<a name="line.205"></a>
+<span class="sourceLineNo">206</span> }<a name="line.206"></a>
+<span class="sourceLineNo">207</span> groupToRegion.put(groupName, region);<a name="line.207"></a>
+<span class="sourceLineNo">208</span> }<a name="line.208"></a>
+<span class="sourceLineNo">209</span> }<a name="line.209"></a>
+<span class="sourceLineNo">210</span> // Now the "groupToRegion" map has only the regions which have correct<a name="line.210"></a>
+<span class="sourceLineNo">211</span> // assignments.<a name="line.211"></a>
+<span class="sourceLineNo">212</span> for (String key : groupToRegion.keySet()) {<a name="line.212"></a>
+<span class="sourceLineNo">213</span> Map<RegionInfo, ServerName> currentAssignmentMap = new TreeMap<RegionInfo, ServerName>();<a name="line.213"></a>
+<span class="sourceLineNo">214</span> List<RegionInfo> regionList = groupToRegion.get(key);<a name="line.214"></a>
+<span class="sourceLineNo">215</span> RSGroupInfo info = rsGroupInfoManager.getRSGroup(key);<a name="line.215"></a>
+<span class="sourceLineNo">216</span> List<ServerName> candidateList = filterOfflineServers(info, servers);<a name="line.216"></a>
+<span class="sourceLineNo">217</span> for (RegionInfo region : regionList) {<a name="line.217"></a>
+<span class="sourceLineNo">218</span> currentAssignmentMap.put(region, regions.get(region));<a name="line.218"></a>
<span class="sourceLineNo">219</span> }<a name="line.219"></a>
-<span class="sourceLineNo">220</span> }<a name="line.220"></a>
-<span class="sourceLineNo">221</span><a name="line.221"></a>
-<span class="sourceLineNo">222</span> for (RegionInfo region : misplacedRegions) {<a name="line.222"></a>
-<span class="sourceLineNo">223</span> String groupName = rsGroupInfoManager.getRSGroupOfTable(region.getTable());<a name="line.223"></a>
-<span class="sourceLineNo">224</span> RSGroupInfo info = rsGroupInfoManager.getRSGroup(groupName);<a name="line.224"></a>
-<span class="sourceLineNo">225</span> List<ServerName> candidateList = filterOfflineServers(info, servers);<a name="line.225"></a>
-<span class="sourceLineNo">226</span> ServerName server = this.internalBalancer.randomAssignment(region,<a name="line.226"></a>
-<span class="sourceLineNo">227</span> candidateList);<a name="line.227"></a>
-<span class="sourceLineNo">228</span> if (server != null) {<a name="line.228"></a>
-<span class="sourceLineNo">229</span> if (!assignments.containsKey(server)) {<a name="line.229"></a>
-<span class="sourceLineNo">230</span> assignments.put(server, new ArrayList<>());<a name="line.230"></a>
-<span class="sourceLineNo">231</span> }<a name="line.231"></a>
-<span class="sourceLineNo">232</span> assignments.get(server).add(region);<a name="line.232"></a>
-<span class="sourceLineNo">233</span> } else {<a name="line.233"></a>
-<span class="sourceLineNo">234</span> //if not server is available assign to bogus so it ends up in RIT<a name="line.234"></a>
-<span class="sourceLineNo">235</span> if(!assignments.containsKey(LoadBalancer.BOGUS_SERVER_NAME)) {<a name="line.235"></a>
-<span class="sourceLineNo">236</span> assignments.put(LoadBalancer.BOGUS_SERVER_NAME, new ArrayList<>());<a name="line.236"></a>
-<span class="sourceLineNo">237</span> }<a name="line.237"></a>
-<span class="sourceLineNo">238</span> assignments.get(LoadBalancer.BOGUS_SERVER_NAME).add(region);<a name="line.238"></a>
-<span class="sourceLineNo">239</span> }<a name="line.239"></a>
-<span class="sourceLineNo">240</span> }<a name="line.240"></a>
-<span class="sourceLineNo">241</span> return assignments;<a name="line.241"></a>
-<span class="sourceLineNo">242</span> } catch (IOException e) {<a name="line.242"></a>
-<span class="sourceLineNo">243</span> throw new HBaseIOException("Failed to do online retain assignment", e);<a name="line.243"></a>
-<span class="sourceLineNo">244</span> }<a name="line.244"></a>
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-<span class="sourceLineNo">246</span><a name="line.246"></a>
-<span class="sourceLineNo">247</span> @Override<a name="line.247"></a>
-<span class="sourceLineNo">248</span> public ServerName randomAssignment(RegionInfo region,<a name="line.248"></a>
-<span class="sourceLineNo">249</span> List<ServerName> servers) throws HBaseIOException {<a name="line.249"></a>
-<span class="sourceLineNo">250</span> ListMultimap<String,RegionInfo> regionMap = LinkedListMultimap.create();<a name="line.250"></a>
-<span class="sourceLineNo">251</span> ListMultimap<String,ServerName> serverMap = LinkedListMultimap.create();<a name="line.251"></a>
-<span class="sourceLineNo">252</span> generateGroupMaps(Lists.newArrayList(region), servers, regionMap, serverMap);<a name="line.252"></a>
-<span class="sourceLineNo">253</span> List<ServerName> filteredServers = serverMap.get(regionMap.keySet().iterator().next());<a name="line.253"></a>
-<span class="sourceLineNo">254</span> return this.internalBalancer.randomAssignment(region, filteredServers);<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> private void generateGroupMaps(<a name="line.257"></a>
-<span class="sourceLineNo">258</span> List<RegionInfo> regions,<a name="line.258"></a>
-<span class="sourceLineNo">259</span> List<ServerName> servers,<a name="line.259"></a>
-<span class="sourceLineNo">260</span> ListMultimap<String, RegionInfo> regionMap,<a name="line.260"></a>
-<span class="sourceLineNo">261</span> ListMultimap<String, ServerName> serverMap) throws HBaseIOException {<a name="line.261"></a>
-<span class="sourceLineNo">262</span> try {<a name="line.262"></a>
-<span class="sourceLineNo">263</span> for (RegionInfo region : regions) {<a name="line.263"></a>
-<span class="sourceLineNo">264</span> String groupName = rsGroupInfoManager.getRSGroupOfTable(region.getTable());<a name="line.264"></a>
-<span class="sourceLineNo">265</span> if (groupName == null) {<a name="line.265"></a>
-<span class="sourceLineNo">266</span> LOG.warn("Group for table "+region.getTable()+" is null");<a name="line.266"></a>
-<span class="sourceLineNo">267</span> }<a name="line.267"></a>
-<span class="sourceLineNo">268</span> regionMap.put(groupName, region);<a name="line.268"></a>
-<span class="sourceLineNo">269</span> }<a name="line.269"></a>
-<span class="sourceLineNo">270</span> for (String groupKey : regionMap.keySet()) {<a name="line.270"></a>
-<span class="sourceLineNo">271</span> RSGroupInfo info = rsGroupInfoManager.getRSGroup(groupKey);<a name="line.271"></a>
-<span class="sourceLineNo">272</span> serverMap.putAll(groupKey, filterOfflineServers(info, servers));<a name="line.272"></a>
-<span class="sourceLineNo">273</span> if(serverMap.get(groupKey).size() < 1) {<a name="line.273"></a>
-<span class="sourceLineNo">274</span> serverMap.put(groupKey, LoadBalancer.BOGUS_SERVER_NAME);<a name="line.274"></a>
-<span class="sourceLineNo">275</span> }<a name="line.275"></a>
-<span class="sourceLineNo">276</span> }<a name="line.276"></a>
-<span class="sourceLineNo">277</span> } catch(IOException e) {<a name="line.277"></a>
-<span class="sourceLineNo">278</span> throw new HBaseIOException("Failed to generate group maps", e);<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> private List<ServerName> filterOfflineServers(RSGroupInfo RSGroupInfo,<a name="line.282"></a>
-<span class="sourceLineNo">283</span> List<ServerName> onlineServers) {<a name="line.283"></a>
-<span class="sourceLineNo">284</span> if (RSGroupInfo != null) {<a name="line.284"></a>
-<span class="sourceLineNo">285</span> return filterServers(RSGroupInfo.getServers(), onlineServers);<a name="line.285"></a>
-<span class="sourceLineNo">286</span> } else {<a name="line.286"></a>
-<span class="sourceLineNo">287</span> LOG.warn("RSGroup Information found to be null. Some regions might be unassigned.");<a name="line.287"></a>
-<span class="sourceLineNo">288</span> return Collections.EMPTY_LIST;<a name="line.288"></a>
-<span class="sourceLineNo">289</span> }<a name="line.289"></a>
-<span class="sourceLineNo">290</span> }<a name="line.290"></a>
-<span class="sourceLineNo">291</span><a name="line.291"></a>
-<span class="sourceLineNo">292</span> /**<a name="line.292"></a>
-<span class="sourceLineNo">293</span> * Filter servers based on the online servers.<a name="line.293"></a>
-<span class="sourceLineNo">294</span> *<a name="line.294"></a>
-<span class="sourceLineNo">295</span> * @param servers<a name="line.295"></a>
-<span class="sourceLineNo">296</span> * the servers<a name="line.296"></a>
-<span class="sourceLineNo">297</span> * @param onlineServers<a name="line.297"></a>
-<span class="sourceLineNo">298</span> * List of servers which are online.<a name="line.298"></a>
-<span class="sourceLineNo">299</span> * @return the list<a name="line.299"></a>
-<span class="sourceLineNo">300</span> */<a name="line.300"></a>
-<span class="sourceLineNo">301</span> private List<ServerName> filterServers(Set<Address> servers,<a name="line.301"></a>
-<span class="sourceLineNo">302</span> List<ServerName> onlineServers) {<a name="line.302"></a>
-<span class="sourceLineNo">303</span> /**<a name="line.303"></a>
-<span class="sourceLineNo">304</span> * servers is actually a TreeSet (see {@link org.apache.hadoop.hbase.rsgroup.RSGroupInfo}),<a name="line.304"></a>
-<span class="sourceLineNo">305</span> * having its contains()'s time complexity as O(logn), which is good enough.<a name="line.305"></a>
-<span class="sourceLineNo">306</span> * TODO: consider using HashSet to pursue O(1) for contains() throughout the calling chain<a name="line.306"></a>
-<span class="sourceLineNo">307</span> * if needed. */<a name="line.307"></a>
-<span class="sourceLineNo">308</span> ArrayList<ServerName> finalList = new ArrayList<>();<a name="line.308"></a>
-<span class="sourceLineNo">309</span> for (ServerName onlineServer : onlineServers) {<a name="line.309"></a>
-<span class="sourceLineNo">310</span> if (servers.contains(onlineServer.getAddress())) {<a name="line.310"></a>
-<span class="sourceLineNo">311</span> finalList.add(onlineServer);<a name="line.311"></a>
-<span class="sourceLineNo">312</span> }<a name="line.312"></a>
-<span class="sourceLineNo">313</span> }<a name="line.313"></a>
-<span class="sourceLineNo">314</span><a name="line.314"></a>
-<span class="sourceLineNo">315</span> return finalList;<a name="line.315"></a>
-<span class="sourceLineNo">316</span> }<a name="line.316"></a>
-<span class="sourceLineNo">317</span><a name="line.317"></a>
-<span class="sourceLineNo">318</span> @VisibleForTesting<a name="line.318"></a>
-<span class="sourceLineNo">319</span> public Set<RegionInfo> getMisplacedRegions(<a name="line.319"></a>
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-<span class="sourceLineNo">321</span> Set<RegionInfo> misplacedRegions = new HashSet<>();<a name="line.321"></a>
-<span class="sourceLineNo">322</span> for(Map.Entry<RegionInfo, ServerName> region : regions.entrySet()) {<a name="line.322"></a>
-<span class="sourceLineNo">323</span> RegionInfo regionInfo = region.getKey();<a name="line.323"></a>
-<span class="sourceLineNo">324</span> ServerName assignedServer = region.getValue();<a name="line.324"></a>
-<span class="sourceLineNo">325</span> RSGroupInfo info = rsGroupInfoManager.getRSGroup(rsGroupInfoManager.<a name="line.325"></a>
-<span class="sourceLineNo">326</span> getRSGroupOfTable(regionInfo.getTable()));<a name="line.326"></a>
-<span class="sourceLineNo">327</span> if (assignedServer == null) {<a name="line.327"></a>
-<span class="sourceLineNo">328</span> LOG.debug("There is no assigned server for {}", region);<a name="line.328"></a>
-<span class="sourceLineNo">329</span> continue;<a name="line.329"></a>
-<span class="sourceLineNo">330</span> }<a name="line.330"></a>
-<span class="sourceLineNo">331</span> RSGroupInfo otherInfo = rsGroupInfoManager.getRSGroupOfServer(assignedServer.getAddress());<a name="line.331"></a>
-<span class="sourceLineNo">332</span> if (info == null && otherInfo == null) {<a name="line.332"></a>
-<span class="sourceLineNo">333</span> LOG.warn("Couldn't obtain rs group information for {} on {}", region, assignedServer);<a name="line.333"></a>
-<span class="sourceLineNo">334</span> continue;<a name="line.334"></a>
-<span class="sourceLineNo">335</span> }<a name="line.335"></a>
-<span class="sourceLineNo">336</span> if ((info == null || !info.containsServer(assignedServer.getAddress()))) {<a name="line.336"></a>
-<span class="sourceLineNo">337</span> LOG.debug("Found misplaced region: " + regionInfo.getRegionNameAsString() +<a name="line.337"></a>
-<span class="sourceLineNo">338</span> " on server: " + assignedServer +<a name="line.338"></a>
-<span class="sourceLineNo">339</span> " found in group: " + otherInfo +<a name="line.339"></a>
-<span class="sourceLineNo">340</span> " outside of group: " + (info == null ? "UNKNOWN" : info.getName()));<a name="line.340"></a>
-<span class="sourceLineNo">341</span> misplacedRegions.add(regionInfo);<a name="line.341"></a>
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-<span class="sourceLineNo">349</span> throws HBaseIOException{<a name="line.349"></a>
-<span class="sourceLineNo">350</span> // To return<a name="line.350"></a>
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-<span class="sourceLineNo">352</span> List<RegionPlan> regionPlansForMisplacedRegions = new ArrayList<>();<a name="line.352"></a>
-<span class="sourceLineNo">353</span><a name="line.353"></a>
-<span class="sourceLineNo">354</span> for (Map.Entry<ServerName, List<RegionInfo>> assignments : existingAssignments.entrySet()){<a name="line.354"></a>
-<span class="sourceLineNo">355</span> ServerName currentHostServer = assignments.getKey();<a name="line.355"></a>
-<span class="sourceLineNo">356</span> correctAssignments.put(currentHostServer, new LinkedList<>());<a name="line.356"></a>
-<span class="sourceLineNo">357</span> List<RegionInfo> regions = assignments.getValue();<a name="line.357"></a>
-<span class="sourceLineNo">358</span> for (RegionInfo region : regions) {<a name="line.358"></a>
-<span class="sourceLineNo">359</span> RSGroupInfo targetRSGInfo = null;<a name="line.359"></a>
-<span class="sourceLineNo">360</span> try {<a name="line.360"></a>
-<span class="sourceLineNo">361</span> targetRSGInfo = rsGroupInfoManager.getRSGroup(<a name="line.361"></a>
-<span class="sourceLineNo">362</span> rsGroupInfoManager.getRSGroupOfTable(region.getTable()));<a name="line.362"></a>
-<span class="sourceLineNo">363</span> } catch (IOException exp) {<a name="line.363"></a>
-<span class="sourceLineNo">364</span> LOG.debug("RSGroup information null for region of table " + region.getTable(),<a name="line.364"></a>
-<span class="sourceLineNo">365</span> exp);<a name="line.365"></a>
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-<span class="sourceLineNo">389</span> LOG.error(msg);<a name="line.389"></a>
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-<span class="sourceLineNo">408</span> internalBalancer.setMasterServices(masterServices);<a name="line.408"></a>
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