You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/05/03 14:47:37 UTC
[11/16] hbase-site git commit: Published site at
4cb444e77b41cdb733544770a471068256d65bbe.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/2d03f412/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html
index 078e4b1..fe1e077 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html
@@ -1265,700 +1265,701 @@
<span class="sourceLineNo">1257</span> } else if (localState == State.OFFLINE || regionInfo.isOffline()) {<a name="line.1257"></a>
<span class="sourceLineNo">1258</span> regionStates.addToOfflineRegions(regionNode);<a name="line.1258"></a>
<span class="sourceLineNo">1259</span> } else if (localState == State.CLOSED && getTableStateManager().<a name="line.1259"></a>
-<span class="sourceLineNo">1260</span> isTableState(regionNode.getTable(), TableState.State.DISABLED)) {<a name="line.1260"></a>
-<span class="sourceLineNo">1261</span> // The region is CLOSED and the table is DISABLED, there is nothing to schedule;<a name="line.1261"></a>
-<span class="sourceLineNo">1262</span> // the region is inert.<a name="line.1262"></a>
-<span class="sourceLineNo">1263</span> } else {<a name="line.1263"></a>
-<span class="sourceLineNo">1264</span> // These regions should have a procedure in replay<a name="line.1264"></a>
-<span class="sourceLineNo">1265</span> regionStates.addRegionInTransition(regionNode, null);<a name="line.1265"></a>
-<span class="sourceLineNo">1266</span> }<a name="line.1266"></a>
-<span class="sourceLineNo">1267</span> }<a name="line.1267"></a>
-<span class="sourceLineNo">1268</span> }<a name="line.1268"></a>
-<span class="sourceLineNo">1269</span> }<a name="line.1269"></a>
-<span class="sourceLineNo">1270</span> });<a name="line.1270"></a>
-<span class="sourceLineNo">1271</span><a name="line.1271"></a>
-<span class="sourceLineNo">1272</span> // every assignment is blocked until meta is loaded.<a name="line.1272"></a>
-<span class="sourceLineNo">1273</span> wakeMetaLoadedEvent();<a name="line.1273"></a>
-<span class="sourceLineNo">1274</span> }<a name="line.1274"></a>
-<span class="sourceLineNo">1275</span><a name="line.1275"></a>
-<span class="sourceLineNo">1276</span> /**<a name="line.1276"></a>
-<span class="sourceLineNo">1277</span> * Look at what is in meta and the list of servers that have checked in and make reconciliation.<a name="line.1277"></a>
-<span class="sourceLineNo">1278</span> * We cannot tell definitively the difference between a clean shutdown and a cluster that has<a name="line.1278"></a>
-<span class="sourceLineNo">1279</span> * been crashed down. At this stage of a Master startup, they look the same: they have the<a name="line.1279"></a>
-<span class="sourceLineNo">1280</span> * same state in hbase:meta. We could do detective work probing ZK and the FS for old WALs to<a name="line.1280"></a>
-<span class="sourceLineNo">1281</span> * split but SCP does this already so just let it do its job.<a name="line.1281"></a>
-<span class="sourceLineNo">1282</span> * <p>>The profiles of clean shutdown and cluster crash-down are the same because on clean<a name="line.1282"></a>
-<span class="sourceLineNo">1283</span> * shutdown currently, we do not update hbase:meta with region close state (In AMv2, region<a name="line.1283"></a>
-<span class="sourceLineNo">1284</span> * state is kept in hbse:meta). Usually the master runs all region transitions as of AMv2 but on<a name="line.1284"></a>
-<span class="sourceLineNo">1285</span> * cluster controlled shutdown, the RegionServers close all their regions only reporting the<a name="line.1285"></a>
-<span class="sourceLineNo">1286</span> * final change to the Master. Currently this report is ignored. Later we could take it and<a name="line.1286"></a>
-<span class="sourceLineNo">1287</span> * update as many regions as we can before hbase:meta goes down or have the master run the<a name="line.1287"></a>
-<span class="sourceLineNo">1288</span> * close of all regions out on the cluster but we may never be able to achieve the proper state on<a name="line.1288"></a>
-<span class="sourceLineNo">1289</span> * all regions (at least not w/o lots of painful manipulations and waiting) so clean shutdown<a name="line.1289"></a>
-<span class="sourceLineNo">1290</span> * might not be possible especially on big clusters.... And clean shutdown will take time. Given<a name="line.1290"></a>
-<span class="sourceLineNo">1291</span> * this current state of affairs, we just run ServerCrashProcedure in both cases. It will always<a name="line.1291"></a>
-<span class="sourceLineNo">1292</span> * do the right thing.<a name="line.1292"></a>
-<span class="sourceLineNo">1293</span> * @return True if for sure this is a failover where a Master is starting up into an already<a name="line.1293"></a>
-<span class="sourceLineNo">1294</span> * running cluster.<a name="line.1294"></a>
-<span class="sourceLineNo">1295</span> */<a name="line.1295"></a>
-<span class="sourceLineNo">1296</span> // The assumption here is that if RSs are crashing while we are executing this<a name="line.1296"></a>
-<span class="sourceLineNo">1297</span> // they will be handled by the SSH that are put in the ServerManager deadservers "queue".<a name="line.1297"></a>
-<span class="sourceLineNo">1298</span> private boolean processofflineServersWithOnlineRegions() {<a name="line.1298"></a>
-<span class="sourceLineNo">1299</span> boolean deadServers = !master.getServerManager().getDeadServers().isEmpty();<a name="line.1299"></a>
-<span class="sourceLineNo">1300</span> final Set<ServerName> offlineServersWithOnlineRegions = new HashSet<>();<a name="line.1300"></a>
-<span class="sourceLineNo">1301</span> int size = regionStates.getRegionStateNodes().size();<a name="line.1301"></a>
-<span class="sourceLineNo">1302</span> final List<RegionInfo> offlineRegionsToAssign = new ArrayList<>(size);<a name="line.1302"></a>
-<span class="sourceLineNo">1303</span> // If deadservers then its a failover, else, we are not sure yet.<a name="line.1303"></a>
-<span class="sourceLineNo">1304</span> boolean failover = deadServers;<a name="line.1304"></a>
-<span class="sourceLineNo">1305</span> for (RegionStateNode regionNode: regionStates.getRegionStateNodes()) {<a name="line.1305"></a>
-<span class="sourceLineNo">1306</span> // Region State can be OPEN even if we did controlled cluster shutdown; Master does not close<a name="line.1306"></a>
-<span class="sourceLineNo">1307</span> // the regions in this case. The RegionServer does the close so hbase:meta is state in<a name="line.1307"></a>
-<span class="sourceLineNo">1308</span> // hbase:meta is not updated -- Master does all updates -- and is left with OPEN as region<a name="line.1308"></a>
-<span class="sourceLineNo">1309</span> // state in meta. How to tell difference between ordered shutdown and crashed-down cluster<a name="line.1309"></a>
-<span class="sourceLineNo">1310</span> // then? We can't. Not currently. Perhaps if we updated hbase:meta with CLOSED on ordered<a name="line.1310"></a>
-<span class="sourceLineNo">1311</span> // shutdown. This would slow shutdown though and not all edits would make it in anyways.<a name="line.1311"></a>
-<span class="sourceLineNo">1312</span> // TODO: Examine.<a name="line.1312"></a>
-<span class="sourceLineNo">1313</span> // Because we can't be sure it an ordered shutdown, we run ServerCrashProcedure always.<a name="line.1313"></a>
-<span class="sourceLineNo">1314</span> // ServerCrashProcedure will try to retain old deploy when it goes to assign.<a name="line.1314"></a>
-<span class="sourceLineNo">1315</span> if (regionNode.getState() == State.OPEN) {<a name="line.1315"></a>
-<span class="sourceLineNo">1316</span> final ServerName serverName = regionNode.getRegionLocation();<a name="line.1316"></a>
-<span class="sourceLineNo">1317</span> if (!master.getServerManager().isServerOnline(serverName)) {<a name="line.1317"></a>
-<span class="sourceLineNo">1318</span> offlineServersWithOnlineRegions.add(serverName);<a name="line.1318"></a>
-<span class="sourceLineNo">1319</span> } else {<a name="line.1319"></a>
-<span class="sourceLineNo">1320</span> // Server is online. This a failover. Master is starting into already-running cluster.<a name="line.1320"></a>
-<span class="sourceLineNo">1321</span> failover = true;<a name="line.1321"></a>
-<span class="sourceLineNo">1322</span> }<a name="line.1322"></a>
-<span class="sourceLineNo">1323</span> } else if (regionNode.getState() == State.OFFLINE) {<a name="line.1323"></a>
-<span class="sourceLineNo">1324</span> if (isTableEnabled(regionNode.getTable())) {<a name="line.1324"></a>
-<span class="sourceLineNo">1325</span> offlineRegionsToAssign.add(regionNode.getRegionInfo());<a name="line.1325"></a>
-<span class="sourceLineNo">1326</span> }<a name="line.1326"></a>
-<span class="sourceLineNo">1327</span> }<a name="line.1327"></a>
-<span class="sourceLineNo">1328</span> }<a name="line.1328"></a>
-<span class="sourceLineNo">1329</span> // Kill servers with online regions just-in-case. Runs ServerCrashProcedure.<a name="line.1329"></a>
-<span class="sourceLineNo">1330</span> for (ServerName serverName: offlineServersWithOnlineRegions) {<a name="line.1330"></a>
-<span class="sourceLineNo">1331</span> if (!master.getServerManager().isServerOnline(serverName)) {<a name="line.1331"></a>
-<span class="sourceLineNo">1332</span> LOG.info("KILL RegionServer=" + serverName + " hosting regions but not online.");<a name="line.1332"></a>
-<span class="sourceLineNo">1333</span> killRegionServer(serverName);<a name="line.1333"></a>
-<span class="sourceLineNo">1334</span> }<a name="line.1334"></a>
-<span class="sourceLineNo">1335</span> }<a name="line.1335"></a>
-<span class="sourceLineNo">1336</span> setFailoverCleanupDone(true);<a name="line.1336"></a>
-<span class="sourceLineNo">1337</span><a name="line.1337"></a>
-<span class="sourceLineNo">1338</span> // Assign offline regions. Uses round-robin.<a name="line.1338"></a>
-<span class="sourceLineNo">1339</span> if (offlineRegionsToAssign.size() > 0) {<a name="line.1339"></a>
-<span class="sourceLineNo">1340</span> master.getMasterProcedureExecutor().submitProcedures(master.getAssignmentManager().<a name="line.1340"></a>
-<span class="sourceLineNo">1341</span> createRoundRobinAssignProcedures(offlineRegionsToAssign));<a name="line.1341"></a>
-<span class="sourceLineNo">1342</span> }<a name="line.1342"></a>
-<span class="sourceLineNo">1343</span><a name="line.1343"></a>
-<span class="sourceLineNo">1344</span> return failover;<a name="line.1344"></a>
-<span class="sourceLineNo">1345</span> }<a name="line.1345"></a>
-<span class="sourceLineNo">1346</span><a name="line.1346"></a>
-<span class="sourceLineNo">1347</span> /**<a name="line.1347"></a>
-<span class="sourceLineNo">1348</span> * Used by ServerCrashProcedure to make sure AssignmentManager has completed<a name="line.1348"></a>
-<span class="sourceLineNo">1349</span> * the failover cleanup before re-assigning regions of dead servers. So that<a name="line.1349"></a>
-<span class="sourceLineNo">1350</span> * when re-assignment happens, AssignmentManager has proper region states.<a name="line.1350"></a>
-<span class="sourceLineNo">1351</span> */<a name="line.1351"></a>
-<span class="sourceLineNo">1352</span> public boolean isFailoverCleanupDone() {<a name="line.1352"></a>
-<span class="sourceLineNo">1353</span> return failoverCleanupDone.isReady();<a name="line.1353"></a>
-<span class="sourceLineNo">1354</span> }<a name="line.1354"></a>
-<span class="sourceLineNo">1355</span><a name="line.1355"></a>
-<span class="sourceLineNo">1356</span> /**<a name="line.1356"></a>
-<span class="sourceLineNo">1357</span> * Used by ServerCrashProcedure tests verify the ability to suspend the<a name="line.1357"></a>
-<span class="sourceLineNo">1358</span> * execution of the ServerCrashProcedure.<a name="line.1358"></a>
-<span class="sourceLineNo">1359</span> */<a name="line.1359"></a>
-<span class="sourceLineNo">1360</span> @VisibleForTesting<a name="line.1360"></a>
-<span class="sourceLineNo">1361</span> public void setFailoverCleanupDone(final boolean b) {<a name="line.1361"></a>
-<span class="sourceLineNo">1362</span> master.getMasterProcedureExecutor().getEnvironment()<a name="line.1362"></a>
-<span class="sourceLineNo">1363</span> .setEventReady(failoverCleanupDone, b);<a name="line.1363"></a>
-<span class="sourceLineNo">1364</span> }<a name="line.1364"></a>
-<span class="sourceLineNo">1365</span><a name="line.1365"></a>
-<span class="sourceLineNo">1366</span> public ProcedureEvent getFailoverCleanupEvent() {<a name="line.1366"></a>
-<span class="sourceLineNo">1367</span> return failoverCleanupDone;<a name="line.1367"></a>
-<span class="sourceLineNo">1368</span> }<a name="line.1368"></a>
-<span class="sourceLineNo">1369</span><a name="line.1369"></a>
-<span class="sourceLineNo">1370</span> /**<a name="line.1370"></a>
-<span class="sourceLineNo">1371</span> * Used to check if the failover cleanup is done.<a name="line.1371"></a>
-<span class="sourceLineNo">1372</span> * if not we throw PleaseHoldException since we are rebuilding the RegionStates<a name="line.1372"></a>
-<span class="sourceLineNo">1373</span> * @param hri region to check if it is already rebuild<a name="line.1373"></a>
-<span class="sourceLineNo">1374</span> * @throws PleaseHoldException if the failover cleanup is not completed<a name="line.1374"></a>
-<span class="sourceLineNo">1375</span> */<a name="line.1375"></a>
-<span class="sourceLineNo">1376</span> private void checkFailoverCleanupCompleted(final RegionInfo hri) throws PleaseHoldException {<a name="line.1376"></a>
-<span class="sourceLineNo">1377</span> if (!isRunning()) {<a name="line.1377"></a>
-<span class="sourceLineNo">1378</span> throw new PleaseHoldException("AssignmentManager not running");<a name="line.1378"></a>
-<span class="sourceLineNo">1379</span> }<a name="line.1379"></a>
-<span class="sourceLineNo">1380</span><a name="line.1380"></a>
-<span class="sourceLineNo">1381</span> // TODO: can we avoid throwing an exception if hri is already loaded?<a name="line.1381"></a>
-<span class="sourceLineNo">1382</span> // at the moment we bypass only meta<a name="line.1382"></a>
-<span class="sourceLineNo">1383</span> boolean meta = isMetaRegion(hri);<a name="line.1383"></a>
-<span class="sourceLineNo">1384</span> boolean cleanup = isFailoverCleanupDone();<a name="line.1384"></a>
-<span class="sourceLineNo">1385</span> if (!isMetaRegion(hri) && !isFailoverCleanupDone()) {<a name="line.1385"></a>
-<span class="sourceLineNo">1386</span> String msg = "Master not fully online; hbase:meta=" + meta + ", failoverCleanup=" + cleanup;<a name="line.1386"></a>
-<span class="sourceLineNo">1387</span> throw new PleaseHoldException(msg);<a name="line.1387"></a>
-<span class="sourceLineNo">1388</span> }<a name="line.1388"></a>
-<span class="sourceLineNo">1389</span> }<a name="line.1389"></a>
-<span class="sourceLineNo">1390</span><a name="line.1390"></a>
-<span class="sourceLineNo">1391</span> // ============================================================================================<a name="line.1391"></a>
-<span class="sourceLineNo">1392</span> // TODO: Metrics<a name="line.1392"></a>
-<span class="sourceLineNo">1393</span> // ============================================================================================<a name="line.1393"></a>
-<span class="sourceLineNo">1394</span> public int getNumRegionsOpened() {<a name="line.1394"></a>
-<span class="sourceLineNo">1395</span> // TODO: Used by TestRegionPlacement.java and assume monotonically increasing value<a name="line.1395"></a>
-<span class="sourceLineNo">1396</span> return 0;<a name="line.1396"></a>
-<span class="sourceLineNo">1397</span> }<a name="line.1397"></a>
-<span class="sourceLineNo">1398</span><a name="line.1398"></a>
-<span class="sourceLineNo">1399</span> public void submitServerCrash(final ServerName serverName, final boolean shouldSplitWal) {<a name="line.1399"></a>
-<span class="sourceLineNo">1400</span> boolean carryingMeta = isCarryingMeta(serverName);<a name="line.1400"></a>
-<span class="sourceLineNo">1401</span> ProcedureExecutor<MasterProcedureEnv> procExec = this.master.getMasterProcedureExecutor();<a name="line.1401"></a>
-<span class="sourceLineNo">1402</span> procExec.submitProcedure(new ServerCrashProcedure(procExec.getEnvironment(), serverName,<a name="line.1402"></a>
-<span class="sourceLineNo">1403</span> shouldSplitWal, carryingMeta));<a name="line.1403"></a>
-<span class="sourceLineNo">1404</span> LOG.debug("Added=" + serverName +<a name="line.1404"></a>
-<span class="sourceLineNo">1405</span> " to dead servers, submitted shutdown handler to be executed meta=" + carryingMeta);<a name="line.1405"></a>
-<span class="sourceLineNo">1406</span> }<a name="line.1406"></a>
-<span class="sourceLineNo">1407</span><a name="line.1407"></a>
-<span class="sourceLineNo">1408</span> public void offlineRegion(final RegionInfo regionInfo) {<a name="line.1408"></a>
-<span class="sourceLineNo">1409</span> // TODO used by MasterRpcServices ServerCrashProcedure<a name="line.1409"></a>
-<span class="sourceLineNo">1410</span> final RegionStateNode node = regionStates.getRegionStateNode(regionInfo);<a name="line.1410"></a>
-<span class="sourceLineNo">1411</span> if (node != null) node.offline();<a name="line.1411"></a>
-<span class="sourceLineNo">1412</span> }<a name="line.1412"></a>
-<span class="sourceLineNo">1413</span><a name="line.1413"></a>
-<span class="sourceLineNo">1414</span> public void onlineRegion(final RegionInfo regionInfo, final ServerName serverName) {<a name="line.1414"></a>
-<span class="sourceLineNo">1415</span> // TODO used by TestSplitTransactionOnCluster.java<a name="line.1415"></a>
-<span class="sourceLineNo">1416</span> }<a name="line.1416"></a>
-<span class="sourceLineNo">1417</span><a name="line.1417"></a>
-<span class="sourceLineNo">1418</span> public Map<ServerName, List<RegionInfo>> getSnapShotOfAssignment(<a name="line.1418"></a>
-<span class="sourceLineNo">1419</span> final Collection<RegionInfo> regions) {<a name="line.1419"></a>
-<span class="sourceLineNo">1420</span> return regionStates.getSnapShotOfAssignment(regions);<a name="line.1420"></a>
-<span class="sourceLineNo">1421</span> }<a name="line.1421"></a>
-<span class="sourceLineNo">1422</span><a name="line.1422"></a>
-<span class="sourceLineNo">1423</span> // ============================================================================================<a name="line.1423"></a>
-<span class="sourceLineNo">1424</span> // TODO: UTILS/HELPERS?<a name="line.1424"></a>
-<span class="sourceLineNo">1425</span> // ============================================================================================<a name="line.1425"></a>
-<span class="sourceLineNo">1426</span> /**<a name="line.1426"></a>
-<span class="sourceLineNo">1427</span> * Used by the client (via master) to identify if all regions have the schema updates<a name="line.1427"></a>
-<span class="sourceLineNo">1428</span> *<a name="line.1428"></a>
-<span class="sourceLineNo">1429</span> * @param tableName<a name="line.1429"></a>
-<span class="sourceLineNo">1430</span> * @return Pair indicating the status of the alter command (pending/total)<a name="line.1430"></a>
-<span class="sourceLineNo">1431</span> * @throws IOException<a name="line.1431"></a>
-<span class="sourceLineNo">1432</span> */<a name="line.1432"></a>
-<span class="sourceLineNo">1433</span> public Pair<Integer, Integer> getReopenStatus(TableName tableName) {<a name="line.1433"></a>
-<span class="sourceLineNo">1434</span> if (isTableDisabled(tableName)) return new Pair<Integer, Integer>(0, 0);<a name="line.1434"></a>
-<span class="sourceLineNo">1435</span><a name="line.1435"></a>
-<span class="sourceLineNo">1436</span> final List<RegionState> states = regionStates.getTableRegionStates(tableName);<a name="line.1436"></a>
-<span class="sourceLineNo">1437</span> int ritCount = 0;<a name="line.1437"></a>
-<span class="sourceLineNo">1438</span> for (RegionState regionState: states) {<a name="line.1438"></a>
-<span class="sourceLineNo">1439</span> if (!regionState.isOpened()) ritCount++;<a name="line.1439"></a>
-<span class="sourceLineNo">1440</span> }<a name="line.1440"></a>
-<span class="sourceLineNo">1441</span> return new Pair<Integer, Integer>(ritCount, states.size());<a name="line.1441"></a>
-<span class="sourceLineNo">1442</span> }<a name="line.1442"></a>
-<span class="sourceLineNo">1443</span><a name="line.1443"></a>
-<span class="sourceLineNo">1444</span> // ============================================================================================<a name="line.1444"></a>
-<span class="sourceLineNo">1445</span> // TODO: Region State In Transition<a name="line.1445"></a>
-<span class="sourceLineNo">1446</span> // ============================================================================================<a name="line.1446"></a>
-<span class="sourceLineNo">1447</span> protected boolean addRegionInTransition(final RegionStateNode regionNode,<a name="line.1447"></a>
-<span class="sourceLineNo">1448</span> final RegionTransitionProcedure procedure) {<a name="line.1448"></a>
-<span class="sourceLineNo">1449</span> return regionStates.addRegionInTransition(regionNode, procedure);<a name="line.1449"></a>
-<span class="sourceLineNo">1450</span> }<a name="line.1450"></a>
-<span class="sourceLineNo">1451</span><a name="line.1451"></a>
-<span class="sourceLineNo">1452</span> protected void removeRegionInTransition(final RegionStateNode regionNode,<a name="line.1452"></a>
-<span class="sourceLineNo">1453</span> final RegionTransitionProcedure procedure) {<a name="line.1453"></a>
-<span class="sourceLineNo">1454</span> regionStates.removeRegionInTransition(regionNode, procedure);<a name="line.1454"></a>
-<span class="sourceLineNo">1455</span> }<a name="line.1455"></a>
-<span class="sourceLineNo">1456</span><a name="line.1456"></a>
-<span class="sourceLineNo">1457</span> public boolean hasRegionsInTransition() {<a name="line.1457"></a>
-<span class="sourceLineNo">1458</span> return regionStates.hasRegionsInTransition();<a name="line.1458"></a>
-<span class="sourceLineNo">1459</span> }<a name="line.1459"></a>
-<span class="sourceLineNo">1460</span><a name="line.1460"></a>
-<span class="sourceLineNo">1461</span> public List<RegionStateNode> getRegionsInTransition() {<a name="line.1461"></a>
-<span class="sourceLineNo">1462</span> return regionStates.getRegionsInTransition();<a name="line.1462"></a>
-<span class="sourceLineNo">1463</span> }<a name="line.1463"></a>
-<span class="sourceLineNo">1464</span><a name="line.1464"></a>
-<span class="sourceLineNo">1465</span> public List<RegionInfo> getAssignedRegions() {<a name="line.1465"></a>
-<span class="sourceLineNo">1466</span> return regionStates.getAssignedRegions();<a name="line.1466"></a>
-<span class="sourceLineNo">1467</span> }<a name="line.1467"></a>
-<span class="sourceLineNo">1468</span><a name="line.1468"></a>
-<span class="sourceLineNo">1469</span> public RegionInfo getRegionInfo(final byte[] regionName) {<a name="line.1469"></a>
-<span class="sourceLineNo">1470</span> final RegionStateNode regionState = regionStates.getRegionStateNodeFromName(regionName);<a name="line.1470"></a>
-<span class="sourceLineNo">1471</span> return regionState != null ? regionState.getRegionInfo() : null;<a name="line.1471"></a>
-<span class="sourceLineNo">1472</span> }<a name="line.1472"></a>
-<span class="sourceLineNo">1473</span><a name="line.1473"></a>
-<span class="sourceLineNo">1474</span> // ============================================================================================<a name="line.1474"></a>
-<span class="sourceLineNo">1475</span> // TODO: Region Status update<a name="line.1475"></a>
-<span class="sourceLineNo">1476</span> // ============================================================================================<a name="line.1476"></a>
-<span class="sourceLineNo">1477</span> private void sendRegionOpenedNotification(final RegionInfo regionInfo,<a name="line.1477"></a>
-<span class="sourceLineNo">1478</span> final ServerName serverName) {<a name="line.1478"></a>
-<span class="sourceLineNo">1479</span> getBalancer().regionOnline(regionInfo, serverName);<a name="line.1479"></a>
-<span class="sourceLineNo">1480</span> if (!this.listeners.isEmpty()) {<a name="line.1480"></a>
-<span class="sourceLineNo">1481</span> for (AssignmentListener listener : this.listeners) {<a name="line.1481"></a>
-<span class="sourceLineNo">1482</span> listener.regionOpened(regionInfo, serverName);<a name="line.1482"></a>
-<span class="sourceLineNo">1483</span> }<a name="line.1483"></a>
-<span class="sourceLineNo">1484</span> }<a name="line.1484"></a>
-<span class="sourceLineNo">1485</span> }<a name="line.1485"></a>
-<span class="sourceLineNo">1486</span><a name="line.1486"></a>
-<span class="sourceLineNo">1487</span> private void sendRegionClosedNotification(final RegionInfo regionInfo) {<a name="line.1487"></a>
-<span class="sourceLineNo">1488</span> getBalancer().regionOffline(regionInfo);<a name="line.1488"></a>
-<span class="sourceLineNo">1489</span> if (!this.listeners.isEmpty()) {<a name="line.1489"></a>
-<span class="sourceLineNo">1490</span> for (AssignmentListener listener : this.listeners) {<a name="line.1490"></a>
-<span class="sourceLineNo">1491</span> listener.regionClosed(regionInfo);<a name="line.1491"></a>
-<span class="sourceLineNo">1492</span> }<a name="line.1492"></a>
-<span class="sourceLineNo">1493</span> }<a name="line.1493"></a>
-<span class="sourceLineNo">1494</span> }<a name="line.1494"></a>
-<span class="sourceLineNo">1495</span><a name="line.1495"></a>
-<span class="sourceLineNo">1496</span> public void markRegionAsOpening(final RegionStateNode regionNode) throws IOException {<a name="line.1496"></a>
-<span class="sourceLineNo">1497</span> synchronized (regionNode) {<a name="line.1497"></a>
-<span class="sourceLineNo">1498</span> regionNode.transitionState(State.OPENING, RegionStates.STATES_EXPECTED_ON_OPEN);<a name="line.1498"></a>
-<span class="sourceLineNo">1499</span> regionStates.addRegionToServer(regionNode);<a name="line.1499"></a>
-<span class="sourceLineNo">1500</span> regionStateStore.updateRegionLocation(regionNode);<a name="line.1500"></a>
-<span class="sourceLineNo">1501</span> }<a name="line.1501"></a>
-<span class="sourceLineNo">1502</span><a name="line.1502"></a>
-<span class="sourceLineNo">1503</span> // update the operation count metrics<a name="line.1503"></a>
-<span class="sourceLineNo">1504</span> metrics.incrementOperationCounter();<a name="line.1504"></a>
-<span class="sourceLineNo">1505</span> }<a name="line.1505"></a>
-<span class="sourceLineNo">1506</span><a name="line.1506"></a>
-<span class="sourceLineNo">1507</span> public void undoRegionAsOpening(final RegionStateNode regionNode) {<a name="line.1507"></a>
-<span class="sourceLineNo">1508</span> boolean opening = false;<a name="line.1508"></a>
-<span class="sourceLineNo">1509</span> synchronized (regionNode) {<a name="line.1509"></a>
-<span class="sourceLineNo">1510</span> if (regionNode.isInState(State.OPENING)) {<a name="line.1510"></a>
-<span class="sourceLineNo">1511</span> opening = true;<a name="line.1511"></a>
-<span class="sourceLineNo">1512</span> regionStates.removeRegionFromServer(regionNode.getRegionLocation(), regionNode);<a name="line.1512"></a>
-<span class="sourceLineNo">1513</span> }<a name="line.1513"></a>
-<span class="sourceLineNo">1514</span> // Should we update hbase:meta?<a name="line.1514"></a>
-<span class="sourceLineNo">1515</span> }<a name="line.1515"></a>
-<span class="sourceLineNo">1516</span> if (opening) {<a name="line.1516"></a>
-<span class="sourceLineNo">1517</span> // TODO: Metrics. Do opposite of metrics.incrementOperationCounter();<a name="line.1517"></a>
-<span class="sourceLineNo">1518</span> }<a name="line.1518"></a>
-<span class="sourceLineNo">1519</span> }<a name="line.1519"></a>
-<span class="sourceLineNo">1520</span><a name="line.1520"></a>
-<span class="sourceLineNo">1521</span> public void markRegionAsOpened(final RegionStateNode regionNode) throws IOException {<a name="line.1521"></a>
-<span class="sourceLineNo">1522</span> final RegionInfo hri = regionNode.getRegionInfo();<a name="line.1522"></a>
-<span class="sourceLineNo">1523</span> synchronized (regionNode) {<a name="line.1523"></a>
-<span class="sourceLineNo">1524</span> regionNode.transitionState(State.OPEN, RegionStates.STATES_EXPECTED_ON_OPEN);<a name="line.1524"></a>
-<span class="sourceLineNo">1525</span> if (isMetaRegion(hri)) {<a name="line.1525"></a>
-<span class="sourceLineNo">1526</span> // Usually we'd set a table ENABLED at this stage but hbase:meta is ALWAYs enabled, it<a name="line.1526"></a>
-<span class="sourceLineNo">1527</span> // can't be disabled -- so skip the RPC (besides... enabled is managed by TableStateManager<a name="line.1527"></a>
-<span class="sourceLineNo">1528</span> // which is backed by hbase:meta... Avoid setting ENABLED to avoid having to update state<a name="line.1528"></a>
-<span class="sourceLineNo">1529</span> // on table that contains state.<a name="line.1529"></a>
-<span class="sourceLineNo">1530</span> setMetaInitialized(hri, true);<a name="line.1530"></a>
-<span class="sourceLineNo">1531</span> }<a name="line.1531"></a>
-<span class="sourceLineNo">1532</span> regionStates.addRegionToServer(regionNode);<a name="line.1532"></a>
-<span class="sourceLineNo">1533</span> // TODO: OPENING Updates hbase:meta too... we need to do both here and there?<a name="line.1533"></a>
-<span class="sourceLineNo">1534</span> // That is a lot of hbase:meta writing.<a name="line.1534"></a>
-<span class="sourceLineNo">1535</span> regionStateStore.updateRegionLocation(regionNode);<a name="line.1535"></a>
-<span class="sourceLineNo">1536</span> sendRegionOpenedNotification(hri, regionNode.getRegionLocation());<a name="line.1536"></a>
-<span class="sourceLineNo">1537</span> }<a name="line.1537"></a>
-<span class="sourceLineNo">1538</span> }<a name="line.1538"></a>
-<span class="sourceLineNo">1539</span><a name="line.1539"></a>
-<span class="sourceLineNo">1540</span> public void markRegionAsClosing(final RegionStateNode regionNode) throws IOException {<a name="line.1540"></a>
-<span class="sourceLineNo">1541</span> final RegionInfo hri = regionNode.getRegionInfo();<a name="line.1541"></a>
-<span class="sourceLineNo">1542</span> synchronized (regionNode) {<a name="line.1542"></a>
-<span class="sourceLineNo">1543</span> regionNode.transitionState(State.CLOSING, RegionStates.STATES_EXPECTED_ON_CLOSE);<a name="line.1543"></a>
-<span class="sourceLineNo">1544</span> // Set meta has not initialized early. so people trying to create/edit tables will wait<a name="line.1544"></a>
-<span class="sourceLineNo">1545</span> if (isMetaRegion(hri)) {<a name="line.1545"></a>
-<span class="sourceLineNo">1546</span> setMetaInitialized(hri, false);<a name="line.1546"></a>
-<span class="sourceLineNo">1547</span> }<a name="line.1547"></a>
-<span class="sourceLineNo">1548</span> regionStates.addRegionToServer(regionNode);<a name="line.1548"></a>
-<span class="sourceLineNo">1549</span> regionStateStore.updateRegionLocation(regionNode);<a name="line.1549"></a>
-<span class="sourceLineNo">1550</span> }<a name="line.1550"></a>
-<span class="sourceLineNo">1551</span><a name="line.1551"></a>
-<span class="sourceLineNo">1552</span> // update the operation count metrics<a name="line.1552"></a>
-<span class="sourceLineNo">1553</span> metrics.incrementOperationCounter();<a name="line.1553"></a>
-<span class="sourceLineNo">1554</span> }<a name="line.1554"></a>
-<span class="sourceLineNo">1555</span><a name="line.1555"></a>
-<span class="sourceLineNo">1556</span> public void undoRegionAsClosing(final RegionStateNode regionNode) {<a name="line.1556"></a>
-<span class="sourceLineNo">1557</span> // TODO: Metrics. Do opposite of metrics.incrementOperationCounter();<a name="line.1557"></a>
-<span class="sourceLineNo">1558</span> // There is nothing to undo?<a name="line.1558"></a>
-<span class="sourceLineNo">1559</span> }<a name="line.1559"></a>
-<span class="sourceLineNo">1560</span><a name="line.1560"></a>
-<span class="sourceLineNo">1561</span> public void markRegionAsClosed(final RegionStateNode regionNode) throws IOException {<a name="line.1561"></a>
-<span class="sourceLineNo">1562</span> final RegionInfo hri = regionNode.getRegionInfo();<a name="line.1562"></a>
-<span class="sourceLineNo">1563</span> synchronized (regionNode) {<a name="line.1563"></a>
-<span class="sourceLineNo">1564</span> regionNode.transitionState(State.CLOSED, RegionStates.STATES_EXPECTED_ON_CLOSE);<a name="line.1564"></a>
-<span class="sourceLineNo">1565</span> regionStates.removeRegionFromServer(regionNode.getRegionLocation(), regionNode);<a name="line.1565"></a>
-<span class="sourceLineNo">1566</span> regionNode.setLastHost(regionNode.getRegionLocation());<a name="line.1566"></a>
-<span class="sourceLineNo">1567</span> regionNode.setRegionLocation(null);<a name="line.1567"></a>
-<span class="sourceLineNo">1568</span> regionStateStore.updateRegionLocation(regionNode);<a name="line.1568"></a>
-<span class="sourceLineNo">1569</span> sendRegionClosedNotification(hri);<a name="line.1569"></a>
-<span class="sourceLineNo">1570</span> }<a name="line.1570"></a>
-<span class="sourceLineNo">1571</span> }<a name="line.1571"></a>
-<span class="sourceLineNo">1572</span><a name="line.1572"></a>
-<span class="sourceLineNo">1573</span> public void markRegionAsSplit(final RegionInfo parent, final ServerName serverName,<a name="line.1573"></a>
-<span class="sourceLineNo">1574</span> final RegionInfo daughterA, final RegionInfo daughterB) throws IOException {<a name="line.1574"></a>
-<span class="sourceLineNo">1575</span> // Update hbase:meta. Parent will be marked offline and split up in hbase:meta.<a name="line.1575"></a>
-<span class="sourceLineNo">1576</span> // The parent stays in regionStates until cleared when removed by CatalogJanitor.<a name="line.1576"></a>
-<span class="sourceLineNo">1577</span> // Update its state in regionStates to it shows as offline and split when read<a name="line.1577"></a>
-<span class="sourceLineNo">1578</span> // later figuring what regions are in a table and what are not: see<a name="line.1578"></a>
-<span class="sourceLineNo">1579</span> // regionStates#getRegionsOfTable<a name="line.1579"></a>
-<span class="sourceLineNo">1580</span> final RegionStateNode node = regionStates.getOrCreateRegionStateNode(parent);<a name="line.1580"></a>
-<span class="sourceLineNo">1581</span> node.setState(State.SPLIT);<a name="line.1581"></a>
-<span class="sourceLineNo">1582</span> final RegionStateNode nodeA = regionStates.getOrCreateRegionStateNode(daughterA);<a name="line.1582"></a>
-<span class="sourceLineNo">1583</span> nodeA.setState(State.SPLITTING_NEW);<a name="line.1583"></a>
-<span class="sourceLineNo">1584</span> final RegionStateNode nodeB = regionStates.getOrCreateRegionStateNode(daughterB);<a name="line.1584"></a>
-<span class="sourceLineNo">1585</span> nodeB.setState(State.SPLITTING_NEW);<a name="line.1585"></a>
-<span class="sourceLineNo">1586</span><a name="line.1586"></a>
-<span class="sourceLineNo">1587</span> regionStateStore.splitRegion(parent, daughterA, daughterB, serverName);<a name="line.1587"></a>
-<span class="sourceLineNo">1588</span> if (shouldAssignFavoredNodes(parent)) {<a name="line.1588"></a>
-<span class="sourceLineNo">1589</span> List<ServerName> onlineServers = this.master.getServerManager().getOnlineServersList();<a name="line.1589"></a>
-<span class="sourceLineNo">1590</span> ((FavoredNodesPromoter)getBalancer()).<a name="line.1590"></a>
-<span class="sourceLineNo">1591</span> generateFavoredNodesForDaughter(onlineServers, parent, daughterA, daughterB);<a name="line.1591"></a>
-<span class="sourceLineNo">1592</span> }<a name="line.1592"></a>
-<span class="sourceLineNo">1593</span> }<a name="line.1593"></a>
-<span class="sourceLineNo">1594</span><a name="line.1594"></a>
-<span class="sourceLineNo">1595</span> /**<a name="line.1595"></a>
-<span class="sourceLineNo">1596</span> * When called here, the merge has happened. The two merged regions have been<a name="line.1596"></a>
-<span class="sourceLineNo">1597</span> * unassigned and the above markRegionClosed has been called on each so they have been<a name="line.1597"></a>
-<span class="sourceLineNo">1598</span> * disassociated from a hosting Server. The merged region will be open after this call. The<a name="line.1598"></a>
-<span class="sourceLineNo">1599</span> * merged regions are removed from hbase:meta below> Later they are deleted from the filesystem<a name="line.1599"></a>
-<span class="sourceLineNo">1600</span> * by the catalog janitor running against hbase:meta. It notices when the merged region no<a name="line.1600"></a>
-<span class="sourceLineNo">1601</span> * longer holds references to the old regions.<a name="line.1601"></a>
-<span class="sourceLineNo">1602</span> */<a name="line.1602"></a>
-<span class="sourceLineNo">1603</span> public void markRegionAsMerged(final RegionInfo child, final ServerName serverName,<a name="line.1603"></a>
-<span class="sourceLineNo">1604</span> final RegionInfo mother, final RegionInfo father) throws IOException {<a name="line.1604"></a>
-<span class="sourceLineNo">1605</span> final RegionStateNode node = regionStates.getOrCreateRegionStateNode(child);<a name="line.1605"></a>
-<span class="sourceLineNo">1606</span> node.setState(State.MERGED);<a name="line.1606"></a>
-<span class="sourceLineNo">1607</span> regionStates.deleteRegion(mother);<a name="line.1607"></a>
-<span class="sourceLineNo">1608</span> regionStates.deleteRegion(father);<a name="line.1608"></a>
-<span class="sourceLineNo">1609</span> regionStateStore.mergeRegions(child, mother, father, serverName);<a name="line.1609"></a>
-<span class="sourceLineNo">1610</span> if (shouldAssignFavoredNodes(child)) {<a name="line.1610"></a>
-<span class="sourceLineNo">1611</span> ((FavoredNodesPromoter)getBalancer()).<a name="line.1611"></a>
-<span class="sourceLineNo">1612</span> generateFavoredNodesForMergedRegion(child, mother, father);<a name="line.1612"></a>
-<span class="sourceLineNo">1613</span> }<a name="line.1613"></a>
-<span class="sourceLineNo">1614</span> }<a name="line.1614"></a>
-<span class="sourceLineNo">1615</span><a name="line.1615"></a>
-<span class="sourceLineNo">1616</span> /*<a name="line.1616"></a>
-<span class="sourceLineNo">1617</span> * Favored nodes should be applied only when FavoredNodes balancer is configured and the region<a name="line.1617"></a>
-<span class="sourceLineNo">1618</span> * belongs to a non-system table.<a name="line.1618"></a>
-<span class="sourceLineNo">1619</span> */<a name="line.1619"></a>
-<span class="sourceLineNo">1620</span> private boolean shouldAssignFavoredNodes(RegionInfo region) {<a name="line.1620"></a>
-<span class="sourceLineNo">1621</span> return this.shouldAssignRegionsWithFavoredNodes &&<a name="line.1621"></a>
-<span class="sourceLineNo">1622</span> FavoredNodesManager.isFavoredNodeApplicable(region);<a name="line.1622"></a>
-<span class="sourceLineNo">1623</span> }<a name="line.1623"></a>
-<span class="sourceLineNo">1624</span><a name="line.1624"></a>
-<span class="sourceLineNo">1625</span> // ============================================================================================<a name="line.1625"></a>
-<span class="sourceLineNo">1626</span> // Assign Queue (Assign/Balance)<a name="line.1626"></a>
-<span class="sourceLineNo">1627</span> // ============================================================================================<a name="line.1627"></a>
-<span class="sourceLineNo">1628</span> private final ArrayList<RegionStateNode> pendingAssignQueue = new ArrayList<RegionStateNode>();<a name="line.1628"></a>
-<span class="sourceLineNo">1629</span> private final ReentrantLock assignQueueLock = new ReentrantLock();<a name="line.1629"></a>
-<span class="sourceLineNo">1630</span> private final Condition assignQueueFullCond = assignQueueLock.newCondition();<a name="line.1630"></a>
-<span class="sourceLineNo">1631</span><a name="line.1631"></a>
-<span class="sourceLineNo">1632</span> /**<a name="line.1632"></a>
-<span class="sourceLineNo">1633</span> * Add the assign operation to the assignment queue.<a name="line.1633"></a>
-<span class="sourceLineNo">1634</span> * The pending assignment operation will be processed,<a name="line.1634"></a>
-<span class="sourceLineNo">1635</span> * and each region will be assigned by a server using the balancer.<a name="line.1635"></a>
-<span class="sourceLineNo">1636</span> */<a name="line.1636"></a>
-<span class="sourceLineNo">1637</span> protected void queueAssign(final RegionStateNode regionNode) {<a name="line.1637"></a>
-<span class="sourceLineNo">1638</span> regionNode.getProcedureEvent().suspend();<a name="line.1638"></a>
-<span class="sourceLineNo">1639</span><a name="line.1639"></a>
-<span class="sourceLineNo">1640</span> // TODO: quick-start for meta and the other sys-tables?<a name="line.1640"></a>
-<span class="sourceLineNo">1641</span> assignQueueLock.lock();<a name="line.1641"></a>
-<span class="sourceLineNo">1642</span> try {<a name="line.1642"></a>
-<span class="sourceLineNo">1643</span> pendingAssignQueue.add(regionNode);<a name="line.1643"></a>
-<span class="sourceLineNo">1644</span> if (regionNode.isSystemTable() ||<a name="line.1644"></a>
-<span class="sourceLineNo">1645</span> pendingAssignQueue.size() == 1 ||<a name="line.1645"></a>
-<span class="sourceLineNo">1646</span> pendingAssignQueue.size() >= assignDispatchWaitQueueMaxSize) {<a name="line.1646"></a>
-<span class="sourceLineNo">1647</span> assignQueueFullCond.signal();<a name="line.1647"></a>
-<span class="sourceLineNo">1648</span> }<a name="line.1648"></a>
-<span class="sourceLineNo">1649</span> } finally {<a name="line.1649"></a>
-<span class="sourceLineNo">1650</span> assignQueueLock.unlock();<a name="line.1650"></a>
-<span class="sourceLineNo">1651</span> }<a name="line.1651"></a>
-<span class="sourceLineNo">1652</span> }<a name="line.1652"></a>
-<span class="sourceLineNo">1653</span><a name="line.1653"></a>
-<span class="sourceLineNo">1654</span> private void startAssignmentThread() {<a name="line.1654"></a>
-<span class="sourceLineNo">1655</span> // Get Server Thread name. Sometimes the Server is mocked so may not implement HasThread.<a name="line.1655"></a>
-<span class="sourceLineNo">1656</span> // For example, in tests.<a name="line.1656"></a>
-<span class="sourceLineNo">1657</span> String name = master instanceof HasThread? ((HasThread)master).getName():<a name="line.1657"></a>
-<span class="sourceLineNo">1658</span> master.getServerName().toShortString();<a name="line.1658"></a>
-<span class="sourceLineNo">1659</span> assignThread = new Thread(name) {<a name="line.1659"></a>
-<span class="sourceLineNo">1660</span> @Override<a name="line.1660"></a>
-<span class="sourceLineNo">1661</span> public void run() {<a name="line.1661"></a>
-<span class="sourceLineNo">1662</span> while (isRunning()) {<a name="line.1662"></a>
-<span class="sourceLineNo">1663</span> processAssignQueue();<a name="line.1663"></a>
-<span class="sourceLineNo">1664</span> }<a name="line.1664"></a>
-<span class="sourceLineNo">1665</span> pendingAssignQueue.clear();<a name="line.1665"></a>
-<span class="sourceLineNo">1666</span> }<a name="line.1666"></a>
-<span class="sourceLineNo">1667</span> };<a name="line.1667"></a>
-<span class="sourceLineNo">1668</span> assignThread.setDaemon(true);<a name="line.1668"></a>
-<span class="sourceLineNo">1669</span> assignThread.start();<a name="line.1669"></a>
-<span class="sourceLineNo">1670</span> }<a name="line.1670"></a>
-<span class="sourceLineNo">1671</span><a name="line.1671"></a>
-<span class="sourceLineNo">1672</span> private void stopAssignmentThread() {<a name="line.1672"></a>
-<span class="sourceLineNo">1673</span> assignQueueSignal();<a name="line.1673"></a>
-<span class="sourceLineNo">1674</span> try {<a name="line.1674"></a>
-<span class="sourceLineNo">1675</span> while (assignThread.isAlive()) {<a name="line.1675"></a>
-<span class="sourceLineNo">1676</span> assignQueueSignal();<a name="line.1676"></a>
-<span class="sourceLineNo">1677</span> assignThread.join(250);<a name="line.1677"></a>
-<span class="sourceLineNo">1678</span> }<a name="line.1678"></a>
-<span class="sourceLineNo">1679</span> } catch (InterruptedException e) {<a name="line.1679"></a>
-<span class="sourceLineNo">1680</span> LOG.warn("join interrupted", e);<a name="line.1680"></a>
-<span class="sourceLineNo">1681</span> Thread.currentThread().interrupt();<a name="line.1681"></a>
-<span class="sourceLineNo">1682</span> }<a name="line.1682"></a>
-<span class="sourceLineNo">1683</span> }<a name="line.1683"></a>
-<span class="sourceLineNo">1684</span><a name="line.1684"></a>
-<span class="sourceLineNo">1685</span> private void assignQueueSignal() {<a name="line.1685"></a>
-<span class="sourceLineNo">1686</span> assignQueueLock.lock();<a name="line.1686"></a>
-<span class="sourceLineNo">1687</span> try {<a name="line.1687"></a>
-<span class="sourceLineNo">1688</span> assignQueueFullCond.signal();<a name="line.1688"></a>
-<span class="sourceLineNo">1689</span> } finally {<a name="line.1689"></a>
-<span class="sourceLineNo">1690</span> assignQueueLock.unlock();<a name="line.1690"></a>
-<span class="sourceLineNo">1691</span> }<a name="line.1691"></a>
-<span class="sourceLineNo">1692</span> }<a name="line.1692"></a>
-<span class="sourceLineNo">1693</span><a name="line.1693"></a>
-<span class="sourceLineNo">1694</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings("WA_AWAIT_NOT_IN_LOOP")<a name="line.1694"></a>
-<span class="sourceLineNo">1695</span> private HashMap<RegionInfo, RegionStateNode> waitOnAssignQueue() {<a name="line.1695"></a>
-<span class="sourceLineNo">1696</span> HashMap<RegionInfo, RegionStateNode> regions = null;<a name="line.1696"></a>
-<span class="sourceLineNo">1697</span><a name="line.1697"></a>
-<span class="sourceLineNo">1698</span> assignQueueLock.lock();<a name="line.1698"></a>
-<span class="sourceLineNo">1699</span> try {<a name="line.1699"></a>
-<span class="sourceLineNo">1700</span> if (pendingAssignQueue.isEmpty() && isRunning()) {<a name="line.1700"></a>
-<span class="sourceLineNo">1701</span> assignQueueFullCond.await();<a name="line.1701"></a>
-<span class="sourceLineNo">1702</span> }<a name="line.1702"></a>
-<span class="sourceLineNo">1703</span><a name="line.1703"></a>
-<span class="sourceLineNo">1704</span> if (!isRunning()) return null;<a name="line.1704"></a>
-<span class="sourceLineNo">1705</span> assignQueueFullCond.await(assignDispatchWaitMillis, TimeUnit.MILLISECONDS);<a name="line.1705"></a>
-<span class="sourceLineNo">1706</span> regions = new HashMap<RegionInfo, RegionStateNode>(pendingAssignQueue.size());<a name="line.1706"></a>
-<span class="sourceLineNo">1707</span> for (RegionStateNode regionNode: pendingAssignQueue) {<a name="line.1707"></a>
-<span class="sourceLineNo">1708</span> regions.put(regionNode.getRegionInfo(), regionNode);<a name="line.1708"></a>
-<span class="sourceLineNo">1709</span> }<a name="line.1709"></a>
-<span class="sourceLineNo">1710</span> pendingAssignQueue.clear();<a name="line.1710"></a>
-<span class="sourceLineNo">1711</span> } catch (InterruptedException e) {<a name="line.1711"></a>
-<span class="sourceLineNo">1712</span> LOG.warn("got interrupted ", e);<a name="line.1712"></a>
-<span class="sourceLineNo">1713</span> Thread.currentThread().interrupt();<a name="line.1713"></a>
-<span class="sourceLineNo">1714</span> } finally {<a name="line.1714"></a>
-<span class="sourceLineNo">1715</span> assignQueueLock.unlock();<a name="line.1715"></a>
-<span class="sourceLineNo">1716</span> }<a name="line.1716"></a>
-<span class="sourceLineNo">1717</span> return regions;<a name="line.1717"></a>
-<span class="sourceLineNo">1718</span> }<a name="line.1718"></a>
-<span class="sourceLineNo">1719</span><a name="line.1719"></a>
-<span class="sourceLineNo">1720</span> private void processAssignQueue() {<a name="line.1720"></a>
-<span class="sourceLineNo">1721</span> final HashMap<RegionInfo, RegionStateNode> regions = waitOnAssignQueue();<a name="line.1721"></a>
-<span class="sourceLineNo">1722</span> if (regions == null || regions.size() == 0 || !isRunning()) {<a name="line.1722"></a>
-<span class="sourceLineNo">1723</span> return;<a name="line.1723"></a>
-<span class="sourceLineNo">1724</span> }<a name="line.1724"></a>
-<span class="sourceLineNo">1725</span><a name="line.1725"></a>
-<span class="sourceLineNo">1726</span> if (LOG.isTraceEnabled()) {<a name="line.1726"></a>
-<span class="sourceLineNo">1727</span> LOG.trace("PROCESS ASSIGN QUEUE regionCount=" + regions.size());<a name="line.1727"></a>
-<span class="sourceLineNo">1728</span> }<a name="line.1728"></a>
-<span class="sourceLineNo">1729</span><a name="line.1729"></a>
-<span class="sourceLineNo">1730</span> // TODO: Optimize balancer. pass a RegionPlan?<a name="line.1730"></a>
-<span class="sourceLineNo">1731</span> final HashMap<RegionInfo, ServerName> retainMap = new HashMap<>();<a name="line.1731"></a>
-<span class="sourceLineNo">1732</span> final List<RegionInfo> userHRIs = new ArrayList<>(regions.size());<a name="line.1732"></a>
-<span class="sourceLineNo">1733</span> // Regions for system tables requiring reassignment<a name="line.1733"></a>
-<span class="sourceLineNo">1734</span> final List<RegionInfo> systemHRIs = new ArrayList<>();<a name="line.1734"></a>
-<span class="sourceLineNo">1735</span> for (RegionStateNode regionStateNode: regions.values()) {<a name="line.1735"></a>
-<span class="sourceLineNo">1736</span> boolean sysTable = regionStateNode.isSystemTable();<a name="line.1736"></a>
-<span class="sourceLineNo">1737</span> final List<RegionInfo> hris = sysTable? systemHRIs: userHRIs;<a name="line.1737"></a>
-<span class="sourceLineNo">1738</span> if (regionStateNode.getRegionLocation() != null) {<a name="line.1738"></a>
-<span class="sourceLineNo">1739</span> retainMap.put(regionStateNode.getRegionInfo(), regionStateNode.getRegionLocation());<a name="line.1739"></a>
-<span class="sourceLineNo">1740</span> } else {<a name="line.1740"></a>
-<span class="sourceLineNo">1741</span> hris.add(regionStateNode.getRegionInfo());<a name="line.1741"></a>
-<span class="sourceLineNo">1742</span> }<a name="line.1742"></a>
-<span class="sourceLineNo">1743</span> }<a name="line.1743"></a>
-<span class="sourceLineNo">1744</span><a name="line.1744"></a>
-<span class="sourceLineNo">1745</span> // TODO: connect with the listener to invalidate the cache<a name="line.1745"></a>
-<span class="sourceLineNo">1746</span><a name="line.1746"></a>
-<span class="sourceLineNo">1747</span> // TODO use events<a name="line.1747"></a>
-<span class="sourceLineNo">1748</span> List<ServerName> servers = master.getServerManager().createDestinationServersList();<a name="line.1748"></a>
-<span class="sourceLineNo">1749</span> for (int i = 0; servers.size() < 1; ++i) {<a name="line.1749"></a>
-<span class="sourceLineNo">1750</span> // Report every fourth time around this loop; try not to flood log.<a name="line.1750"></a>
-<span class="sourceLineNo">1751</span> if (i % 4 == 0) {<a name="line.1751"></a>
-<span class="sourceLineNo">1752</span> LOG.warn("No servers available; cannot place " + regions.size() + " unassigned regions.");<a name="line.1752"></a>
-<span class="sourceLineNo">1753</span> }<a name="line.1753"></a>
-<span class="sourceLineNo">1754</span><a name="line.1754"></a>
-<span class="sourceLineNo">1755</span> if (!isRunning()) {<a name="line.1755"></a>
-<span class="sourceLineNo">1756</span> LOG.debug("Stopped! Dropping assign of " + regions.size() + " queued regions.");<a name="line.1756"></a>
-<span class="sourceLineNo">1757</span> return;<a name="line.1757"></a>
-<span class="sourceLineNo">1758</span> }<a name="line.1758"></a>
-<span class="sourceLineNo">1759</span> Threads.sleep(250);<a name="line.1759"></a>
-<span class="sourceLineNo">1760</span> servers = master.getServerManager().createDestinationServersList();<a name="line.1760"></a>
-<span class="sourceLineNo">1761</span> }<a name="line.1761"></a>
-<span class="sourceLineNo">1762</span><a name="line.1762"></a>
-<span class="sourceLineNo">1763</span> if (!systemHRIs.isEmpty()) {<a name="line.1763"></a>
-<span class="sourceLineNo">1764</span> // System table regions requiring reassignment are present, get region servers<a name="line.1764"></a>
-<span class="sourceLineNo">1765</span> // not available for system table regions<a name="line.1765"></a>
-<span class="sourceLineNo">1766</span> final List<ServerName> excludeServers = getExcludedServersForSystemTable();<a name="line.1766"></a>
-<span class="sourceLineNo">1767</span> List<ServerName> serversForSysTables = servers.stream()<a name="line.1767"></a>
-<span class="sourceLineNo">1768</span> .filter(s -> !excludeServers.contains(s)).collect(Collectors.toList());<a name="line.1768"></a>
-<span class="sourceLineNo">1769</span> if (serversForSysTables.isEmpty()) {<a name="line.1769"></a>
-<span class="sourceLineNo">1770</span> LOG.warn("Filtering old server versions and the excluded produced an empty set; " +<a name="line.1770"></a>
-<span class="sourceLineNo">1771</span> "instead considering all candidate servers!");<a name="line.1771"></a>
-<span class="sourceLineNo">1772</span> }<a name="line.1772"></a>
-<span class="sourceLineNo">1773</span> LOG.debug("Processing assignQueue; systemServersCount=" + serversForSysTables.size() +<a name="line.1773"></a>
-<span class="sourceLineNo">1774</span> ", allServersCount=" + servers.size());<a name="line.1774"></a>
-<span class="sourceLineNo">1775</span> processAssignmentPlans(regions, null, systemHRIs,<a name="line.1775"></a>
-<span class="sourceLineNo">1776</span> serversForSysTables.isEmpty()? servers: serversForSysTables);<a name="line.1776"></a>
-<span class="sourceLineNo">1777</span> }<a name="line.1777"></a>
-<span class="sourceLineNo">1778</span><a name="line.1778"></a>
-<span class="sourceLineNo">1779</span> processAssignmentPlans(regions, retainMap, userHRIs, servers);<a name="line.1779"></a>
-<span class="sourceLineNo">1780</span> }<a name="line.1780"></a>
-<span class="sourceLineNo">1781</span><a name="line.1781"></a>
-<span class="sourceLineNo">1782</span> private void processAssignmentPlans(final HashMap<RegionInfo, RegionStateNode> regions,<a name="line.1782"></a>
-<span class="sourceLineNo">1783</span> final HashMap<RegionInfo, ServerName> retainMap, final List<RegionInfo> hris,<a name="line.1783"></a>
-<span class="sourceLineNo">1784</span> final List<ServerName> servers) {<a name="line.1784"></a>
-<span class="sourceLineNo">1785</span> boolean isTraceEnabled = LOG.isTraceEnabled();<a name="line.1785"></a>
-<span class="sourceLineNo">1786</span> if (isTraceEnabled) {<a name="line.1786"></a>
-<span class="sourceLineNo">1787</span> LOG.trace("Available servers count=" + servers.size() + ": " + servers);<a name="line.1787"></a>
-<span class="sourceLineNo">1788</span> }<a name="line.1788"></a>
-<span class="sourceLineNo">1789</span><a name="line.1789"></a>
-<span class="sourceLineNo">1790</span> final LoadBalancer balancer = getBalancer();<a name="line.1790"></a>
-<span class="sourceLineNo">1791</span> // ask the balancer where to place regions<a name="line.1791"></a>
-<span class="sourceLineNo">1792</span> if (retainMap != null && !retainMap.isEmpty()) {<a name="line.1792"></a>
-<span class="sourceLineNo">1793</span> if (isTraceEnabled) {<a name="line.1793"></a>
-<span class="sourceLineNo">1794</span> LOG.trace("retain assign regions=" + retainMap);<a name="line.1794"></a>
-<span class="sourceLineNo">1795</span> }<a name="line.1795"></a>
-<span class="sourceLineNo">1796</span> try {<a name="line.1796"></a>
-<span class="sourceLineNo">1797</span> acceptPlan(regions, balancer.retainAssignment(retainMap, servers));<a name="line.1797"></a>
-<span class="sourceLineNo">1798</span> } catch (HBaseIOException e) {<a name="line.1798"></a>
-<span class="sourceLineNo">1799</span> LOG.warn("unable to retain assignment", e);<a name="line.1799"></a>
-<span class="sourceLineNo">1800</span> addToPendingAssignment(regions, retainMap.keySet());<a name="line.1800"></a>
-<span class="sourceLineNo">1801</span> }<a name="line.1801"></a>
-<span class="sourceLineNo">1802</span> }<a name="line.1802"></a>
-<span class="sourceLineNo">1803</span><a name="line.1803"></a>
-<span class="sourceLineNo">1804</span> // TODO: Do we need to split retain and round-robin?<a name="line.1804"></a>
-<span class="sourceLineNo">1805</span> // the retain seems to fallback to round-robin/random if the region is not in the map.<a name="line.1805"></a>
-<span class="sourceLineNo">1806</span> if (!hris.isEmpty()) {<a name="line.1806"></a>
-<span class="sourceLineNo">1807</span> Collections.sort(hris, RegionInfo.COMPARATOR);<a name="line.1807"></a>
-<span class="sourceLineNo">1808</span> if (isTraceEnabled) {<a name="line.1808"></a>
-<span class="sourceLineNo">1809</span> LOG.trace("round robin regions=" + hris);<a name="line.1809"></a>
-<span class="sourceLineNo">1810</span> }<a name="line.1810"></a>
-<span class="sourceLineNo">1811</span> try {<a name="line.1811"></a>
-<span class="sourceLineNo">1812</span> acceptPlan(regions, balancer.roundRobinAssignment(hris, servers));<a name="line.1812"></a>
-<span class="sourceLineNo">1813</span> } catch (HBaseIOException e) {<a name="line.1813"></a>
-<span class="sourceLineNo">1814</span> LOG.warn("unable to round-robin assignment", e);<a name="line.1814"></a>
-<span class="sourceLineNo">1815</span> addToPendingAssignment(regions, hris);<a name="line.1815"></a>
-<span class="sourceLineNo">1816</span> }<a name="line.1816"></a>
-<span class="sourceLineNo">1817</span> }<a name="line.1817"></a>
-<span class="sourceLineNo">1818</span> }<a name="line.1818"></a>
-<span class="sourceLineNo">1819</span><a name="line.1819"></a>
-<span class="sourceLineNo">1820</span> private void acceptPlan(final HashMap<RegionInfo, RegionStateNode> regions,<a name="line.1820"></a>
-<span class="sourceLineNo">1821</span> final Map<ServerName, List<RegionInfo>> plan) throws HBaseIOException {<a name="line.1821"></a>
-<span class="sourceLineNo">1822</span> final ProcedureEvent[] events = new ProcedureEvent[regions.size()];<a name="line.1822"></a>
-<span class="sourceLineNo">1823</span> final long st = System.currentTimeMillis();<a name="line.1823"></a>
-<span class="sourceLineNo">1824</span><a name="line.1824"></a>
-<span class="sourceLineNo">1825</span> if (plan == null) {<a name="line.1825"></a>
-<span class="sourceLineNo">1826</span> throw new HBaseIOException("unable to compute plans for regions=" + regions.size());<a name="line.1826"></a>
-<span class="sourceLineNo">1827</span> }<a name="line.1827"></a>
-<span class="sourceLineNo">1828</span><a name="line.1828"></a>
-<span class="sourceLineNo">1829</span> if (plan.isEmpty()) return;<a name="line.1829"></a>
-<span class="sourceLineNo">1830</span><a name="line.1830"></a>
-<span class="sourceLineNo">1831</span> int evcount = 0;<a name="line.1831"></a>
-<span class="sourceLineNo">1832</span> for (Map.Entry<ServerName, List<RegionInfo>> entry: plan.entrySet()) {<a name="line.1832"></a>
-<span class="sourceLineNo">1833</span> final ServerName server = entry.getKey();<a name="line.1833"></a>
-<span class="sourceLineNo">1834</span> for (RegionInfo hri: entry.getValue()) {<a name="line.1834"></a>
-<span class="sourceLineNo">1835</span> final RegionStateNode regionNode = regions.get(hri);<a name="line.1835"></a>
-<span class="sourceLineNo">1836</span> regionNode.setRegionLocation(server);<a name="line.1836"></a>
-<span class="sourceLineNo">1837</span> events[evcount++] = regionNode.getProcedureEvent();<a name="line.1837"></a>
-<span class="sourceLineNo">1838</span> }<a name="line.1838"></a>
-<span class="sourceLineNo">1839</span> }<a name="line.1839"></a>
-<span class="sourceLineNo">1840</span> ProcedureEvent.wakeEvents(getProcedureScheduler(), events);<a name="line.1840"></a>
-<span class="sourceLineNo">1841</span><a name="line.1841"></a>
-<span class="sourceLineNo">1842</span> final long et = System.currentTimeMillis();<a name="line.1842"></a>
-<span class="sourceLineNo">1843</span> if (LOG.isTraceEnabled()) {<a name="line.1843"></a>
-<span class="sourceLineNo">1844</span> LOG.trace("ASSIGN ACCEPT " + events.length + " -> " +<a name="line.1844"></a>
-<span class="sourceLineNo">1845</span> StringUtils.humanTimeDiff(et - st));<a name="line.1845"></a>
-<span class="sourceLineNo">1846</span> }<a name="line.1846"></a>
-<span class="sourceLineNo">1847</span> }<a name="line.1847"></a>
-<span class="sourceLineNo">1848</span><a name="line.1848"></a>
-<span class="sourceLineNo">1849</span> private void addToPendingAssignment(final HashMap<RegionInfo, RegionStateNode> regions,<a name="line.1849"></a>
-<span class="sourceLineNo">1850</span> final Collection<RegionInfo> pendingRegions) {<a name="line.1850"></a>
-<span class="sourceLineNo">1851</span> assignQueueLock.lock();<a name="line.1851"></a>
-<span class="sourceLineNo">1852</span> try {<a name="line.1852"></a>
-<span class="sourceLineNo">1853</span> for (RegionInfo hri: pendingRegions) {<a name="line.1853"></a>
-<span class="sourceLineNo">1854</span> pendingAssignQueue.add(regions.get(hri));<a name="line.1854"></a>
-<span class="sourceLineNo">1855</span> }<a name="line.1855"></a>
-<span class="sourceLineNo">1856</span> } finally {<a name="line.1856"></a>
-<span class="sourceLineNo">1857</span> assignQueueLock.unlock();<a name="line.1857"></a>
-<span class="sourceLineNo">1858</span> }<a name="line.1858"></a>
-<span class="sourceLineNo">1859</span> }<a name="line.1859"></a>
-<span class="sourceLineNo">1860</span><a name="line.1860"></a>
-<span class="sourceLineNo">1861</span> /**<a name="line.1861"></a>
-<span class="sourceLineNo">1862</span> * Get a list of servers that this region cannot be assigned to.<a name="line.1862"></a>
-<span class="sourceLineNo">1863</span> * For system tables, we must assign them to a server with highest version.<a name="line.1863"></a>
-<span class="sourceLineNo">1864</span> */<a name="line.1864"></a>
-<span class="sourceLineNo">1865</span> public List<ServerName> getExcludedServersForSystemTable() {<a name="line.1865"></a>
-<span class="sourceLineNo">1866</span> // TODO: This should be a cached list kept by the ServerManager rather than calculated on each<a name="line.1866"></a>
-<span class="sourceLineNo">1867</span> // move or system region assign. The RegionServerTracker keeps list of online Servers with<a name="line.1867"></a>
-<span class="sourceLineNo">1868</span> // RegionServerInfo that includes Version.<a name="line.1868"></a>
-<span class="sourceLineNo">1869</span> List<Pair<ServerName, String>> serverList = master.getServerManager().getOnlineServersList()<a name="line.1869"></a>
-<span class="sourceLineNo">1870</span> .stream()<a name="line.1870"></a>
-<span class="sourceLineNo">1871</span> .map((s)->new Pair<>(s, master.getRegionServerVersion(s)))<a name="line.1871"></a>
-<span class="sourceLineNo">1872</span> .collect(Collectors.toList());<a name="line.1872"></a>
-<span class="sourceLineNo">1873</span> if (serverList.isEmpty()) {<a name="line.1873"></a>
-<span class="sourceLineNo">1874</span> return Collections.EMPTY_LIST;<a name="line.1874"></a>
-<span class="sourceLineNo">1875</span> }<a name="line.1875"></a>
-<span class="sourceLineNo">1876</span> String highestVersion = Collections.max(serverList,<a name="line.1876"></a>
-<span class="sourceLineNo">1877</span> (o1, o2) -> VersionInfo.compareVersion(o1.getSecond(), o2.getSecond())).getSecond();<a name="line.1877"></a>
-<span class="sourceLineNo">1878</span> return serverList.stream()<a name="line.1878"></a>
-<span class="sourceLineNo">1879</span> .filter((p)->!p.getSecond().equals(highestVersion))<a name="line.1879"></a>
-<span class="sourceLineNo">1880</span> .map(Pair::getFirst)<a name="line.1880"></a>
-<span class="sourceLineNo">1881</span> .collect(Collectors.toList());<a name="line.1881"></a>
-<span class="sourceLineNo">1882</span> }<a name="line.1882"></a>
-<span class="sourceLineNo">1883</span><a name="line.1883"></a>
-<span class="sourceLineNo">1884</span> // ============================================================================================<a name="line.1884"></a>
-<span class="sourceLineNo">1885</span> // Server Helpers<a name="line.1885"></a>
-<span class="sourceLineNo">1886</span> // ============================================================================================<a name="line.1886"></a>
-<span class="sourceLineNo">1887</span> @Override<a name="line.1887"></a>
-<span class="sourceLineNo">1888</span> public void serverAdded(final ServerName serverName) {<a name="line.1888"></a>
-<span class="sourceLineNo">1889</span> }<a name="line.1889"></a>
-<span class="sourceLineNo">1890</span><a name="line.1890"></a>
-<span class="sourceLineNo">1891</span> @Override<a name="line.1891"></a>
-<span class="sourceLineNo">1892</span> public void serverRemoved(final ServerName serverName) {<a name="line.1892"></a>
-<span class="sourceLineNo">1893</span> final ServerStateNode serverNode = regionStates.getServerNode(serverName);<a name="line.1893"></a>
-<span class="sourceLineNo">1894</span> if (serverNode == null) return;<a name="line.1894"></a>
-<span class="sourceLineNo">1895</span><a name="line.1895"></a>
-<span class="sourceLineNo">1896</span> // just in case, wake procedures waiting for this server report<a name="line.1896"></a>
-<span class="sourceLineNo">1897</span> wakeServerReportEvent(serverNode);<a name="line.1897"></a>
-<span class="sourceLineNo">1898</span> }<a name="line.1898"></a>
-<span class="sourceLineNo">1899</span><a name="line.1899"></a>
-<span class="sourceLineNo">1900</span> public int getServerVersion(final ServerName serverName) {<a name="line.1900"></a>
-<span class="sourceLineNo">1901</span> final ServerStateNode node = regionStates.getServerNode(serverName);<a name="line.1901"></a>
-<span class="sourceLineNo">1902</span> return node != null ? node.getVersionNumber() : 0;<a name="line.1902"></a>
-<span class="sourceLineNo">1903</span> }<a name="line.1903"></a>
-<span class="sourceLineNo">1904</span><a name="line.1904"></a>
-<span class="sourceLineNo">1905</span> public void killRegionServer(final ServerName serverName) {<a name="line.1905"></a>
-<span class="sourceLineNo">1906</span> final ServerStateNode serverNode = regionStates.getServerNode(serverName);<a name="line.1906"></a>
-<span class="sourceLineNo">1907</span> killRegionServer(serverNode);<a name="line.1907"></a>
-<span class="sourceLineNo">1908</span> }<a name="line.1908"></a>
-<span class="sourceLineNo">1909</span><a name="line.1909"></a>
-<span class="sourceLineNo">1910</span> public void killRegionServer(final ServerStateNode serverNode) {<a name="line.1910"></a>
-<span class="sourceLineNo">1911</span> /** Don't do this. Messes up accounting. Let ServerCrashProcedure do this.<a name="line.1911"></a>
-<span class="sourceLineNo">1912</span> for (RegionStateNode regionNode: serverNode.getRegions()) {<a name="line.1912"></a>
-<span class="sourceLineNo">1913</span> regionNode.offline();<a name="line.1913"></a>
-<span class="sourceLineNo">1914</span> }*/<a name="line.1914"></a>
-<span class="sourceLineNo">1915</span> master.getServerManager().expireServer(serverNode.getServerName());<a name="line.1915"></a>
-<span class="sourceLineNo">1916</span> }<a name="line.1916"></a>
-<span class="sourceLineNo">1917</span><a name="line.1917"></a>
-<span class="sourceLineNo">1918</span> /**<a name="line.1918"></a>
-<span class="sourceLineNo">1919</span> * Handle RIT of meta region against crashed server.<a name="line.1919"></a>
-<span class="sourceLineNo">1920</span> * Only used when ServerCrashProcedure is not enabled.<a name="line.1920"></a>
-<span class="sourceLineNo">1921</span> * See handleRIT in ServerCrashProcedure for similar function.<a name="line.1921"></a>
-<span class="sourceLineNo">1922</span> *<a name="line.1922"></a>
-<span class="sourceLineNo">1923</span> * @param serverName Server that has already crashed<a name="line.1923"></a>
-<span class="sourceLineNo">1924</span> */<a name="line.1924"></a>
-<span class="sourceLineNo">1925</span> public void handleMetaRITOnCrashedServer(ServerName serverName) {<a name="line.1925"></a>
-<span class="sourceLineNo">1926</span> RegionInfo hri = RegionReplicaUtil<a name="line.1926"></a>
-<span class="sourceLineNo">1927</span> .getRegionInfoForReplica(RegionInfoBuilder.FIRST_META_REGIONINFO,<a name="line.1927"></a>
-<span class="sourceLineNo">1928</span> RegionInfo.DEFAULT_REPLICA_ID);<a name="line.1928"></a>
-<span class="sourceLineNo">1929</span> RegionState regionStateNode = getRegionStates().getRegionState(hri);<a name="line.1929"></a>
-<span class="sourceLineNo">1930</span> if (regionStateNode == null) {<a name="line.1930"></a>
-<span class="sourceLineNo">1931</span> LOG.warn("RegionStateNode is null for " + hri);<a name="line.1931"></a>
-<span class="sourceLineNo">1932</span> return;<a name="line.1932"></a>
-<span class="sourceLineNo">1933</span> }<a name="line.1933"></a>
-<span class="sourceLineNo">1934</span> ServerName rsnServerName = regionStateNode.getServerName();<a name="line.1934"></a>
-<span class="sourceLineNo">1935</span> if (rsnServerName != null && !rsnServerName.equals(serverName)) {<a name="line.1935"></a>
-<span class="sourceLineNo">1936</span> return;<a name="line.1936"></a>
-<span class="sourceLineNo">1937</span> } else if (rsnServerName == null) {<a name="line.1937"></a>
-<span class="sourceLineNo">1938</span> LOG.warn("Empty ServerName in RegionStateNode; proceeding anyways in case latched " +<a name="line.1938"></a>
-<span class="sourceLineNo">1939</span> "RecoverMetaProcedure so meta latch gets cleaned up.");<a name="line.1939"></a>
-<span class="sourceLineNo">1940</span> }<a name="line.1940"></a>
-<span class="sourceLineNo">1941</span> // meta has been assigned to crashed server.<a name="line.1941"></a>
-<span class="sourceLineNo">1942</span> LOG.info("Meta assigned to crashed " + serverName + "; reassigning...");<a name="line.1942"></a>
-<span class="sourceLineNo">1943</span> // Handle failure and wake event<a name="line.1943"></a>
-<span class="sourceLineNo">1944</span> RegionTransitionProcedure rtp = getRegionStates().getRegionTransitionProcedure(hri);<a name="line.1944"></a>
-<span class="sourceLineNo">1945</span> // Do not need to consider for REGION_TRANSITION_QUEUE step<a name="line.1945"></a>
-<span class="sourceLineNo">1946</span> if (rtp != null && rtp.isMeta() &&<a name="line.1946"></a>
-<span class="sourceLineNo">1947</span> rtp.getTransitionState() == RegionTransitionState.REGION_TRANSITION_DISPATCH) {<a name="line.1947"></a>
-<span class="sourceLineNo">1948</span> LOG.debug("Failing " + rtp.toString());<a name="line.1948"></a>
-<span class="sourceLineNo">1949</span> rtp.remoteCallFailed(master.getMasterProcedureExecutor().getEnvironment(), serverName,<a name="line.1949"></a>
-<span class="sourceLineNo">1950</span> new ServerCrashException(rtp.getProcId(), serverName));<a name="line.1950"></a>
-<span class="sourceLineNo">1951</span> }<a name="line.1951"></a>
-<span class="sourceLineNo">1952</span> }<a name="line.1952"></a>
-<span class="sourceLineNo">1953</span>}<a name="line.1953"></a>
+<span class="sourceLineNo">1260</span> isTableState(regionNode.getTable(), TableState.State.DISABLED,<a name="line.1260"></a>
+<span class="sourceLineNo">1261</span> TableState.State.DISABLING)) {<a name="line.1261"></a>
+<span class="sourceLineNo">1262</span> // The region is CLOSED and the table is DISABLED/ DISABLING, there is nothing to<a name="line.1262"></a>
+<span class="sourceLineNo">1263</span> // schedule; the region is inert.<a name="line.1263"></a>
+<span class="sourceLineNo">1264</span> } else {<a name="line.1264"></a>
+<span class="sourceLineNo">1265</span> // These regions should have a procedure in replay<a name="line.1265"></a>
+<span class="sourceLineNo">1266</span> regionStates.addRegionInTransition(regionNode, null);<a name="line.1266"></a>
+<span class="sourceLineNo">1267</span> }<a name="line.1267"></a>
+<span class="sourceLineNo">1268</span> }<a name="line.1268"></a>
+<span class="sourceLineNo">1269</span> }<a name="line.1269"></a>
+<span class="sourceLineNo">1270</span> }<a name="line.1270"></a>
+<span class="sourceLineNo">1271</span> });<a name="line.1271"></a>
+<span class="sourceLineNo">1272</span><a name="line.1272"></a>
+<span class="sourceLineNo">1273</span> // every assignment is blocked until meta is loaded.<a name="line.1273"></a>
+<span class="sourceLineNo">1274</span> wakeMetaLoadedEvent();<a name="line.1274"></a>
+<span class="sourceLineNo">1275</span> }<a name="line.1275"></a>
+<span class="sourceLineNo">1276</span><a name="line.1276"></a>
+<span class="sourceLineNo">1277</span> /**<a name="line.1277"></a>
+<span class="sourceLineNo">1278</span> * Look at what is in meta and the list of servers that have checked in and make reconciliation.<a name="line.1278"></a>
+<span class="sourceLineNo">1279</span> * We cannot tell definitively the difference between a clean shutdown and a cluster that has<a name="line.1279"></a>
+<span class="sourceLineNo">1280</span> * been crashed down. At this stage of a Master startup, they look the same: they have the<a name="line.1280"></a>
+<span class="sourceLineNo">1281</span> * same state in hbase:meta. We could do detective work probing ZK and the FS for old WALs to<a name="line.1281"></a>
+<span class="sourceLineNo">1282</span> * split but SCP does this already so just let it do its job.<a name="line.1282"></a>
+<span class="sourceLineNo">1283</span> * <p>>The profiles of clean shutdown and cluster crash-down are the same because on clean<a name="line.1283"></a>
+<span class="sourceLineNo">1284</span> * shutdown currently, we do not update hbase:meta with region close state (In AMv2, region<a name="line.1284"></a>
+<span class="sourceLineNo">1285</span> * state is kept in hbse:meta). Usually the master runs all region transitions as of AMv2 but on<a name="line.1285"></a>
+<span class="sourceLineNo">1286</span> * cluster controlled shutdown, the RegionServers close all their regions only reporting the<a name="line.1286"></a>
+<span class="sourceLineNo">1287</span> * final change to the Master. Currently this report is ignored. Later we could take it and<a name="line.1287"></a>
+<span class="sourceLineNo">1288</span> * update as many regions as we can before hbase:meta goes down or have the master run the<a name="line.1288"></a>
+<span class="sourceLineNo">1289</span> * close of all regions out on the cluster but we may never be able to achieve the proper state on<a name="line.1289"></a>
+<span class="sourceLineNo">1290</span> * all regions (at least not w/o lots of painful manipulations and waiting) so clean shutdown<a name="line.1290"></a>
+<span class="sourceLineNo">1291</span> * might not be possible especially on big clusters.... And clean shutdown will take time. Given<a name="line.1291"></a>
+<span class="sourceLineNo">1292</span> * this current state of affairs, we just run ServerCrashProcedure in both cases. It will always<a name="line.1292"></a>
+<span class="sourceLineNo">1293</span> * do the right thing.<a name="line.1293"></a>
+<span class="sourceLineNo">1294</span> * @return True if for sure this is a failover where a Master is starting up into an already<a name="line.1294"></a>
+<span class="sourceLineNo">1295</span> * running cluster.<a name="line.1295"></a>
+<span class="sourceLineNo">1296</span> */<a name="line.1296"></a>
+<span class="sourceLineNo">1297</span> // The assumption here is that if RSs are crashing while we are executing this<a name="line.1297"></a>
+<span class="sourceLineNo">1298</span> // they will be handled by the SSH that are put in the ServerManager deadservers "queue".<a name="line.1298"></a>
+<span class="sourceLineNo">1299</span> private boolean processofflineServersWithOnlineRegions() {<a name="line.1299"></a>
+<span class="sourceLineNo">1300</span> boolean deadServers = !master.getServerManager().getDeadServers().isEmpty();<a name="line.1300"></a>
+<span class="sourceLineNo">1301</span> final Set<ServerName> offlineServersWithOnlineRegions = new HashSet<>();<a name="line.1301"></a>
+<span class="sourceLineNo">1302</span> int size = regionStates.getRegionStateNodes().size();<a name="line.1302"></a>
+<span class="sourceLineNo">1303</span> final List<RegionInfo> offlineRegionsToAssign = new ArrayList<>(size);<a name="line.1303"></a>
+<span class="sourceLineNo">1304</span> // If deadservers then its a failover, else, we are not sure yet.<a name="line.1304"></a>
+<span class="sourceLineNo">1305</span> boolean failover = deadServers;<a name="line.1305"></a>
+<span class="sourceLineNo">1306</span> for (RegionStateNode regionNode: regionStates.getRegionStateNodes()) {<a name="line.1306"></a>
+<span class="sourceLineNo">1307</span> // Region State can be OPEN even if we did controlled cluster shutdown; Master does not close<a name="line.1307"></a>
+<span class="sourceLineNo">1308</span> // the regions in this case. The RegionServer does the close so hbase:meta is state in<a name="line.1308"></a>
+<span class="sourceLineNo">1309</span> // hbase:meta is not updated -- Master does all updates -- and is left with OPEN as region<a name="line.1309"></a>
+<span class="sourceLineNo">1310</span> // state in meta. How to tell difference between ordered shutdown and crashed-down cluster<a name="line.1310"></a>
+<span class="sourceLineNo">1311</span> // then? We can't. Not currently. Perhaps if we updated hbase:meta with CLOSED on ordered<a name="line.1311"></a>
+<span class="sourceLineNo">1312</span> // shutdown. This would slow shutdown though and not all edits would make it in anyways.<a name="line.1312"></a>
+<span class="sourceLineNo">1313</span> // TODO: Examine.<a name="line.1313"></a>
+<span class="sourceLineNo">1314</span> // Because we can't be sure it an ordered shutdown, we run ServerCrashProcedure always.<a name="line.1314"></a>
+<span class="sourceLineNo">1315</span> // ServerCrashProcedure will try to retain old deploy when it goes to assign.<a name="line.1315"></a>
+<span class="sourceLineNo">1316</span> if (regionNode.getState() == State.OPEN) {<a name="line.1316"></a>
+<span class="sourceLineNo">1317</span> final ServerName serverName = regionNode.getRegionLocation();<a name="line.1317"></a>
+<span class="sourceLineNo">1318</span> if (!master.getServerManager().isServerOnline(serverName)) {<a name="line.1318"></a>
+<span class="sourceLineNo">1319</span> offlineServersWithOnlineRegions.add(serverName);<a name="line.1319"></a>
+<span class="sourceLineNo">1320</span> } else {<a name="line.1320"></a>
+<span class="sourceLineNo">1321</span> // Server is online. This a failover. Master is starting into already-running cluster.<a name="line.1321"></a>
+<span class="sourceLineNo">1322</span> failover = true;<a name="line.1322"></a>
+<span class="sourceLineNo">1323</span> }<a name="line.1323"></a>
+<span class="sourceLineNo">1324</span> } else if (regionNode.getState() == State.OFFLINE) {<a name="line.1324"></a>
+<span class="sourceLineNo">1325</span> if (isTableEnabled(regionNode.getTable())) {<a name="line.1325"></a>
+<span class="sourceLineNo">1326</span> offlineRegionsToAssign.add(regionNode.getRegionInfo());<a name="line.1326"></a>
+<span class="sourceLineNo">1327</span> }<a name="line.1327"></a>
+<span class="sourceLineNo">1328</span> }<a name="line.1328"></a>
+<span class="sourceLineNo">1329</span> }<a name="line.1329"></a>
+<span class="sourceLineNo">1330</span> // Kill servers with online regions just-in-case. Runs ServerCrashProcedure.<a name="line.1330"></a>
+<span class="sourceLineNo">1331</span> for (ServerName serverName: offlineServersWithOnlineRegions) {<a name="line.1331"></a>
+<span class="sourceLineNo">1332</span> if (!master.getServerManager().isServerOnline(serverName)) {<a name="line.1332"></a>
+<span class="sourceLineNo">1333</span> LOG.info("KILL RegionServer=" + serverName + " hosting regions but not online.");<a name="line.1333"></a>
+<span class="sourceLineNo">1334</span> killRegionServer(serverName);<a name="line.1334"></a>
+<span class="sourceLineNo">1335</span> }<a name="line.1335"></a>
+<span class="sourceLineNo">1336</span> }<a name="line.1336"></a>
+<span class="sourceLineNo">1337</span> setFailoverCleanupDone(true);<a name="line.1337"></a>
+<span class="sourceLineNo">1338</span><a name="line.1338"></a>
+<span class="sourceLineNo">1339</span> // Assign offline regions. Uses round-robin.<a name="line.1339"></a>
+<span class="sourceLineNo">1340</span> if (offlineRegionsToAssign.size() > 0) {<a name="line.1340"></a>
+<span class="sourceLineNo">1341</span> master.getMasterProcedureExecutor().submitProcedures(master.getAssignmentManager().<a name="line.1341"></a>
+<span class="sourceLineNo">1342</span> createRoundRobinAssignProcedures(offlineRegionsToAssign));<a name="line.1342"></a>
+<span class="sourceLineNo">1343</span> }<a name="line.1343"></a>
+<span class="sourceLineNo">1344</span><a name="line.1344"></a>
+<span class="sourceLineNo">1345</span> return failover;<a name="line.1345"></a>
+<span class="sourceLineNo">1346</span> }<a name="line.1346"></a>
+<span class="sourceLineNo">1347</span><a name="line.1347"></a>
+<span class="sourceLineNo">1348</span> /**<a name="line.1348"></a>
+<span class="sourceLineNo">1349</span> * Used by ServerCrashProcedure to make sure AssignmentManager has completed<a name="line.1349"></a>
+<span class="sourceLineNo">1350</span> * the failover cleanup before re-assigning regions of dead servers. So that<a name="line.1350"></a>
+<span class="sourceLineNo">1351</span> * when re-assignment happens, AssignmentManager has proper region states.<a name="line.1351"></a>
+<span class="sourceLineNo">1352</span> */<a name="line.1352"></a>
+<span class="sourceLineNo">1353</span> public boolean isFailoverCleanupDone() {<a name="line.1353"></a>
+<span class="sourceLineNo">1354</span> return failoverCleanupDone.isReady();<a name="line.1354"></a>
+<span class="sourceLineNo">1355</span> }<a name="line.1355"></a>
+<span class="sourceLineNo">1356</span><a name="line.1356"></a>
+<span class="sourceLineNo">1357</span> /**<a name="line.1357"></a>
+<span class="sourceLineNo">1358</span> * Used by ServerCrashProcedure tests verify the ability to suspend the<a name="line.1358"></a>
+<span class="sourceLineNo">1359</span> * execution of the ServerCrashProcedure.<a name="line.1359"></a>
+<span class="sourceLineNo">1360</span> */<a name="line.1360"></a>
+<span class="sourceLineNo">1361</span> @VisibleForTesting<a name="line.1361"></a>
+<span class="sourceLineNo">1362</span> public void setFailoverCleanupDone(final boolean b) {<a name="line.1362"></a>
+<span class="sourceLineNo">1363</span> master.getMasterProcedureExecutor().getEnvironment()<a name="line.1363"></a>
+<span class="sourceLineNo">1364</span> .setEventReady(failoverCleanupDone, b);<a name="line.1364"></a>
+<span class="sourceLineNo">1365</span> }<a name="line.1365"></a>
+<span class="sourceLineNo">1366</span><a name="line.1366"></a>
+<span class="sourceLineNo">1367</span> public ProcedureEvent getFailoverCleanupEvent() {<a name="line.1367"></a>
+<span class="sourceLineNo">1368</span> return failoverCleanupDone;<a name="line.1368"></a>
+<span class="sourceLineNo">1369</span> }<a name="line.1369"></a>
+<span class="sourceLineNo">1370</span><a name="line.1370"></a>
+<span class="sourceLineNo">1371</span> /**<a name="line.1371"></a>
+<span class="sourceLineNo">1372</span> * Used to check if the failover cleanup is done.<a name="line.1372"></a>
+<span class="sourceLineNo">1373</span> * if not we throw PleaseHoldException since we are rebuilding the RegionStates<a name="line.1373"></a>
+<span class="sourceLineNo">1374</span> * @param hri region to check if it is already rebuild<a name="line.1374"></a>
+<span class="sourceLineNo">1375</span> * @throws PleaseHoldException if the failover cleanup is not completed<a name="line.1375"></a>
+<span class="sourceLineNo">1376</span> */<a name="line.1376"></a>
+<span class="sourceLineNo">1377</span> private void checkFailoverCleanupCompleted(final RegionInfo hri) throws PleaseHoldException {<a name="line.1377"></a>
+<span class="sourceLineNo">1378</span> if (!isRunning()) {<a name="line.1378"></a>
+<span class="sourceLineNo">1379</span> throw new PleaseHoldException("AssignmentManager not running");<a name="line.1379"></a>
+<span class="sourceLineNo">1380</span> }<a name="line.1380"></a>
+<span class="sourceLineNo">1381</span><a name="line.1381"></a>
+<span class="sourceLineNo">1382</span> // TODO: can we avoid throwing an exception if hri is already loaded?<a name="line.1382"></a>
+<span class="sourceLineNo">1383</span> // at the moment we bypass only meta<a name="line.1383"></a>
+<span class="sourceLineNo">1384</span> boolean meta = isMetaRegion(hri);<a name="line.1384"></a>
+<span class="sourceLineNo">1385</span> boolean cleanup = isFailoverCleanupDone();<a name="line.1385"></a>
+<span class="sourceLineNo">1386</span> if (!isMetaRegion(hri) && !isFailoverCleanupDone()) {<a name="line.1386"></a>
+<span class="sourceLineNo">1387</span> String msg = "Master not fully online; hbase:meta=" + meta + ", failoverCleanup=" + cleanup;<a name="line.1387"></a>
+<span class="sourceLineNo">1388</span> throw new PleaseHoldException(msg);<a name="line.1388"></a>
+<span class="sourceLineNo">1389</span> }<a name="line.1389"></a>
+<span class="sourceLineNo">1390</span> }<a name="line.1390"></a>
+<span class="sourceLineNo">1391</span><a name="line.1391"></a>
+<span class="sourceLineNo">1392</span> // ==================
<TRUNCATED>