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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/02/05 15:14:14 UTC
[25/35] hbase-site git commit: Published site at .
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/04d647a7/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 1451196..c472f61 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.html
@@ -28,15 +28,15 @@
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
-<span class="sourceLineNo">023</span>import java.util.Collection;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import java.util.Collections;<a name="line.24"></a>
-<span class="sourceLineNo">025</span>import java.util.HashMap;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import java.util.HashSet;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import java.util.LinkedList;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import java.util.List;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import java.util.Map;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import java.util.Set;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import java.util.TreeMap;<a name="line.31"></a>
+<span class="sourceLineNo">023</span>import java.util.Collections;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.HashMap;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.HashSet;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.LinkedList;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import java.util.List;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import java.util.Map;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import java.util.Set;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import java.util.TreeMap;<a name="line.30"></a>
+<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.conf.Configuration;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.ClusterMetrics;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.34"></a>
@@ -296,154 +296,158 @@
<span class="sourceLineNo">288</span> * List of servers which are online.<a name="line.288"></a>
<span class="sourceLineNo">289</span> * @return the list<a name="line.289"></a>
<span class="sourceLineNo">290</span> */<a name="line.290"></a>
-<span class="sourceLineNo">291</span> private List<ServerName> filterServers(Collection<Address> servers,<a name="line.291"></a>
-<span class="sourceLineNo">292</span> Collection<ServerName> onlineServers) {<a name="line.292"></a>
-<span class="sourceLineNo">293</span> ArrayList<ServerName> finalList = new ArrayList<ServerName>();<a name="line.293"></a>
-<span class="sourceLineNo">294</span> for (Address server : servers) {<a name="line.294"></a>
-<span class="sourceLineNo">295</span> for(ServerName curr: onlineServers) {<a name="line.295"></a>
-<span class="sourceLineNo">296</span> if(curr.getAddress().equals(server)) {<a name="line.296"></a>
-<span class="sourceLineNo">297</span> finalList.add(curr);<a name="line.297"></a>
-<span class="sourceLineNo">298</span> }<a name="line.298"></a>
-<span class="sourceLineNo">299</span> }<a name="line.299"></a>
-<span class="sourceLineNo">300</span> }<a name="line.300"></a>
-<span class="sourceLineNo">301</span> return finalList;<a name="line.301"></a>
-<span class="sourceLineNo">302</span> }<a name="line.302"></a>
-<span class="sourceLineNo">303</span><a name="line.303"></a>
-<span class="sourceLineNo">304</span> @VisibleForTesting<a name="line.304"></a>
-<span class="sourceLineNo">305</span> public Set<RegionInfo> getMisplacedRegions(<a name="line.305"></a>
-<span class="sourceLineNo">306</span> Map<RegionInfo, ServerName> regions) throws IOException {<a name="line.306"></a>
-<span class="sourceLineNo">307</span> Set<RegionInfo> misplacedRegions = new HashSet<>();<a name="line.307"></a>
-<span class="sourceLineNo">308</span> for(Map.Entry<RegionInfo, ServerName> region : regions.entrySet()) {<a name="line.308"></a>
-<span class="sourceLineNo">309</span> RegionInfo regionInfo = region.getKey();<a name="line.309"></a>
-<span class="sourceLineNo">310</span> ServerName assignedServer = region.getValue();<a name="line.310"></a>
-<span class="sourceLineNo">311</span> RSGroupInfo info = rsGroupInfoManager.getRSGroup(rsGroupInfoManager.<a name="line.311"></a>
-<span class="sourceLineNo">312</span> getRSGroupOfTable(regionInfo.getTable()));<a name="line.312"></a>
-<span class="sourceLineNo">313</span> if (assignedServer == null) {<a name="line.313"></a>
-<span class="sourceLineNo">314</span> LOG.debug("There is no assigned server for {}", region);<a name="line.314"></a>
-<span class="sourceLineNo">315</span> continue;<a name="line.315"></a>
-<span class="sourceLineNo">316</span> }<a name="line.316"></a>
-<span class="sourceLineNo">317</span> RSGroupInfo otherInfo = rsGroupInfoManager.getRSGroupOfServer(assignedServer.getAddress());<a name="line.317"></a>
-<span class="sourceLineNo">318</span> if (info == null && otherInfo == null) {<a name="line.318"></a>
-<span class="sourceLineNo">319</span> LOG.warn("Couldn't obtain rs group information for {} on {}", region, assignedServer);<a name="line.319"></a>
-<span class="sourceLineNo">320</span> continue;<a name="line.320"></a>
-<span class="sourceLineNo">321</span> }<a name="line.321"></a>
-<span class="sourceLineNo">322</span> if ((info == null || !info.containsServer(assignedServer.getAddress()))) {<a name="line.322"></a>
-<span class="sourceLineNo">323</span> LOG.debug("Found misplaced region: " + regionInfo.getRegionNameAsString() +<a name="line.323"></a>
-<span class="sourceLineNo">324</span> " on server: " + assignedServer +<a name="line.324"></a>
-<span class="sourceLineNo">325</span> " found in group: " + otherInfo +<a name="line.325"></a>
-<span class="sourceLineNo">326</span> " outside of group: " + (info == null ? "UNKNOWN" : info.getName()));<a name="line.326"></a>
-<span class="sourceLineNo">327</span> misplacedRegions.add(regionInfo);<a name="line.327"></a>
-<span class="sourceLineNo">328</span> }<a name="line.328"></a>
-<span class="sourceLineNo">329</span> }<a name="line.329"></a>
-<span class="sourceLineNo">330</span> return misplacedRegions;<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 ServerName findServerForRegion(<a name="line.333"></a>
-<span class="sourceLineNo">334</span> Map<ServerName, List<RegionInfo>> existingAssignments, RegionInfo region) {<a name="line.334"></a>
-<span class="sourceLineNo">335</span> for (Map.Entry<ServerName, List<RegionInfo>> entry : existingAssignments.entrySet()) {<a name="line.335"></a>
-<span class="sourceLineNo">336</span> if (entry.getValue().contains(region)) {<a name="line.336"></a>
-<span class="sourceLineNo">337</span> return entry.getKey();<a name="line.337"></a>
-<span class="sourceLineNo">338</span> }<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> throw new IllegalStateException("Could not find server for region "<a name="line.341"></a>
-<span class="sourceLineNo">342</span> + region.getShortNameToLog());<a name="line.342"></a>
-<span class="sourceLineNo">343</span> }<a name="line.343"></a>
+<span class="sourceLineNo">291</span> private List<ServerName> filterServers(Set<Address> servers,<a name="line.291"></a>
+<span class="sourceLineNo">292</span> List<ServerName> onlineServers) {<a name="line.292"></a>
+<span class="sourceLineNo">293</span> /**<a name="line.293"></a>
+<span class="sourceLineNo">294</span> * servers is actually a TreeSet (see {@link org.apache.hadoop.hbase.rsgroup.RSGroupInfo}),<a name="line.294"></a>
+<span class="sourceLineNo">295</span> * having its contains()'s time complexity as O(logn), which is good enough.<a name="line.295"></a>
+<span class="sourceLineNo">296</span> * TODO: consider using HashSet to pursue O(1) for contains() throughout the calling chain<a name="line.296"></a>
+<span class="sourceLineNo">297</span> * if needed. */<a name="line.297"></a>
+<span class="sourceLineNo">298</span> ArrayList<ServerName> finalList = new ArrayList<>();<a name="line.298"></a>
+<span class="sourceLineNo">299</span> for (ServerName onlineServer : onlineServers) {<a name="line.299"></a>
+<span class="sourceLineNo">300</span> if (servers.contains(onlineServer.getAddress())) {<a name="line.300"></a>
+<span class="sourceLineNo">301</span> finalList.add(onlineServer);<a name="line.301"></a>
+<span class="sourceLineNo">302</span> }<a name="line.302"></a>
+<span class="sourceLineNo">303</span> }<a name="line.303"></a>
+<span class="sourceLineNo">304</span><a name="line.304"></a>
+<span class="sourceLineNo">305</span> return finalList;<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> @VisibleForTesting<a name="line.308"></a>
+<span class="sourceLineNo">309</span> public Set<RegionInfo> getMisplacedRegions(<a name="line.309"></a>
+<span class="sourceLineNo">310</span> Map<RegionInfo, ServerName> regions) throws IOException {<a name="line.310"></a>
+<span class="sourceLineNo">311</span> Set<RegionInfo> misplacedRegions = new HashSet<>();<a name="line.311"></a>
+<span class="sourceLineNo">312</span> for(Map.Entry<RegionInfo, ServerName> region : regions.entrySet()) {<a name="line.312"></a>
+<span class="sourceLineNo">313</span> RegionInfo regionInfo = region.getKey();<a name="line.313"></a>
+<span class="sourceLineNo">314</span> ServerName assignedServer = region.getValue();<a name="line.314"></a>
+<span class="sourceLineNo">315</span> RSGroupInfo info = rsGroupInfoManager.getRSGroup(rsGroupInfoManager.<a name="line.315"></a>
+<span class="sourceLineNo">316</span> getRSGroupOfTable(regionInfo.getTable()));<a name="line.316"></a>
+<span class="sourceLineNo">317</span> if (assignedServer == null) {<a name="line.317"></a>
+<span class="sourceLineNo">318</span> LOG.debug("There is no assigned server for {}", region);<a name="line.318"></a>
+<span class="sourceLineNo">319</span> continue;<a name="line.319"></a>
+<span class="sourceLineNo">320</span> }<a name="line.320"></a>
+<span class="sourceLineNo">321</span> RSGroupInfo otherInfo = rsGroupInfoManager.getRSGroupOfServer(assignedServer.getAddress());<a name="line.321"></a>
+<span class="sourceLineNo">322</span> if (info == null && otherInfo == null) {<a name="line.322"></a>
+<span class="sourceLineNo">323</span> LOG.warn("Couldn't obtain rs group information for {} on {}", region, assignedServer);<a name="line.323"></a>
+<span class="sourceLineNo">324</span> continue;<a name="line.324"></a>
+<span class="sourceLineNo">325</span> }<a name="line.325"></a>
+<span class="sourceLineNo">326</span> if ((info == null || !info.containsServer(assignedServer.getAddress()))) {<a name="line.326"></a>
+<span class="sourceLineNo">327</span> LOG.debug("Found misplaced region: " + regionInfo.getRegionNameAsString() +<a name="line.327"></a>
+<span class="sourceLineNo">328</span> " on server: " + assignedServer +<a name="line.328"></a>
+<span class="sourceLineNo">329</span> " found in group: " + otherInfo +<a name="line.329"></a>
+<span class="sourceLineNo">330</span> " outside of group: " + (info == null ? "UNKNOWN" : info.getName()));<a name="line.330"></a>
+<span class="sourceLineNo">331</span> misplacedRegions.add(regionInfo);<a name="line.331"></a>
+<span class="sourceLineNo">332</span> }<a name="line.332"></a>
+<span class="sourceLineNo">333</span> }<a name="line.333"></a>
+<span class="sourceLineNo">334</span> return misplacedRegions;<a name="line.334"></a>
+<span class="sourceLineNo">335</span> }<a name="line.335"></a>
+<span class="sourceLineNo">336</span><a name="line.336"></a>
+<span class="sourceLineNo">337</span> private ServerName findServerForRegion(<a name="line.337"></a>
+<span class="sourceLineNo">338</span> Map<ServerName, List<RegionInfo>> existingAssignments, RegionInfo region) {<a name="line.338"></a>
+<span class="sourceLineNo">339</span> for (Map.Entry<ServerName, List<RegionInfo>> entry : existingAssignments.entrySet()) {<a name="line.339"></a>
+<span class="sourceLineNo">340</span> if (entry.getValue().contains(region)) {<a name="line.340"></a>
+<span class="sourceLineNo">341</span> return entry.getKey();<a name="line.341"></a>
+<span class="sourceLineNo">342</span> }<a name="line.342"></a>
+<span class="sourceLineNo">343</span> }<a name="line.343"></a>
<span class="sourceLineNo">344</span><a name="line.344"></a>
-<span class="sourceLineNo">345</span> private Map<ServerName, List<RegionInfo>> correctAssignments(<a name="line.345"></a>
-<span class="sourceLineNo">346</span> Map<ServerName, List<RegionInfo>> existingAssignments)<a name="line.346"></a>
-<span class="sourceLineNo">347</span> throws HBaseIOException{<a name="line.347"></a>
-<span class="sourceLineNo">348</span> Map<ServerName, List<RegionInfo>> correctAssignments = new TreeMap<>();<a name="line.348"></a>
-<span class="sourceLineNo">349</span> correctAssignments.put(LoadBalancer.BOGUS_SERVER_NAME, new LinkedList<>());<a name="line.349"></a>
-<span class="sourceLineNo">350</span> for (Map.Entry<ServerName, List<RegionInfo>> assignments : existingAssignments.entrySet()){<a name="line.350"></a>
-<span class="sourceLineNo">351</span> ServerName sName = assignments.getKey();<a name="line.351"></a>
-<span class="sourceLineNo">352</span> correctAssignments.put(sName, new LinkedList<>());<a name="line.352"></a>
-<span class="sourceLineNo">353</span> List<RegionInfo> regions = assignments.getValue();<a name="line.353"></a>
-<span class="sourceLineNo">354</span> for (RegionInfo region : regions) {<a name="line.354"></a>
-<span class="sourceLineNo">355</span> RSGroupInfo info = null;<a name="line.355"></a>
-<span class="sourceLineNo">356</span> try {<a name="line.356"></a>
-<span class="sourceLineNo">357</span> info = rsGroupInfoManager.getRSGroup(<a name="line.357"></a>
-<span class="sourceLineNo">358</span> rsGroupInfoManager.getRSGroupOfTable(region.getTable()));<a name="line.358"></a>
-<span class="sourceLineNo">359</span> } catch (IOException exp) {<a name="line.359"></a>
-<span class="sourceLineNo">360</span> LOG.debug("RSGroup information null for region of table " + region.getTable(),<a name="line.360"></a>
-<span class="sourceLineNo">361</span> exp);<a name="line.361"></a>
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-<span class="sourceLineNo">364</span> correctAssignments.get(LoadBalancer.BOGUS_SERVER_NAME).add(region);<a name="line.364"></a>
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-<span class="sourceLineNo">366</span> correctAssignments.get(sName).add(region);<a name="line.366"></a>
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-<span class="sourceLineNo">375</span> try {<a name="line.375"></a>
-<span class="sourceLineNo">376</span> if (rsGroupInfoManager == null) {<a name="line.376"></a>
-<span class="sourceLineNo">377</span> List<RSGroupAdminEndpoint> cps =<a name="line.377"></a>
-<span class="sourceLineNo">378</span> masterServices.getMasterCoprocessorHost().findCoprocessors(RSGroupAdminEndpoint.class);<a name="line.378"></a>
-<span class="sourceLineNo">379</span> if (cps.size() != 1) {<a name="line.379"></a>
-<span class="sourceLineNo">380</span> String msg = "Expected one implementation of GroupAdminEndpoint but found " + cps.size();<a name="line.380"></a>
-<span class="sourceLineNo">381</span> LOG.error(msg);<a name="line.381"></a>
-<span class="sourceLineNo">382</span> throw new HBaseIOException(msg);<a name="line.382"></a>
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-<span class="sourceLineNo">384</span> rsGroupInfoManager = cps.get(0).getGroupInfoManager();<a name="line.384"></a>
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-<span class="sourceLineNo">387</span> throw new HBaseIOException("Failed to initialize GroupInfoManagerImpl", e);<a name="line.387"></a>
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-<span class="sourceLineNo">390</span> // Create the balancer<a name="line.390"></a>
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-<span class="sourceLineNo">409</span> public void setClusterLoad(Map<TableName, Map<ServerName, List<RegionInfo>>> clusterLoad) {<a name="line.409"></a>
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+<span class="sourceLineNo">346</span> + region.getShortNameToLog());<a name="line.346"></a>
+<span class="sourceLineNo">347</span> }<a name="line.347"></a>
+<span class="sourceLineNo">348</span><a name="line.348"></a>
+<span class="sourceLineNo">349</span> private Map<ServerName, List<RegionInfo>> correctAssignments(<a name="line.349"></a>
+<span class="sourceLineNo">350</span> Map<ServerName, List<RegionInfo>> existingAssignments)<a name="line.350"></a>
+<span class="sourceLineNo">351</span> throws HBaseIOException{<a name="line.351"></a>
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+<span class="sourceLineNo">357</span> List<RegionInfo> regions = assignments.getValue();<a name="line.357"></a>
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+<span class="sourceLineNo">360</span> try {<a name="line.360"></a>
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+<span class="sourceLineNo">365</span> exp);<a name="line.365"></a>
+<span class="sourceLineNo">366</span> }<a name="line.366"></a>
+<span class="sourceLineNo">367</span> if ((info == null) || (!info.containsServer(sName.getAddress()))) {<a name="line.367"></a>
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+<span class="sourceLineNo">369</span> } else {<a name="line.369"></a>
+<span class="sourceLineNo">370</span> correctAssignments.get(sName).add(region);<a name="line.370"></a>
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+<span class="sourceLineNo">372</span> }<a name="line.372"></a>
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+<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> @Override<a name="line.377"></a>
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