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new a51b995c8e2 Published site at e6977a95975580831a31d122c800d01cadac007a.
a51b995c8e2 is described below
commit a51b995c8e2a6de309513cf7c00e0c44ac0e0719
Author: jenkins <bu...@apache.org>
AuthorDate: Sun Mar 19 14:45:35 2023 +0000
Published site at e6977a95975580831a31d122c800d01cadac007a.
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-<span class="sourceLineNo">1302</span> "Merge of regionA=" + hriA + " regionB=" + hriB + " failed because merge switch is off");<a name="line.1302"></a>
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+<span class="sourceLineNo">1188</span> // the table/region is gone. maybe a delete, split, merge<a name="line.1188"></a>
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+<span class="sourceLineNo">1191</span> regionInfo, state));<a name="line.1191"></a>
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+<span class="sourceLineNo">1193</span> LOG.trace("Update region transition serverName={} region={} regionState={}", serverName,<a name="line.1193"></a>
+<span class="sourceLineNo">1194</span> regionNode, state);<a name="line.1194"></a>
+<span class="sourceLineNo">1195</span><a name="line.1195"></a>
+<span class="sourceLineNo">1196</span> ServerStateNode serverNode = regionStates.getOrCreateServer(serverName);<a name="line.1196"></a>
+<span class="sourceLineNo">1197</span> regionNode.lock();<a name="line.1197"></a>
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+<span class="sourceLineNo">1200</span> // Don't log WARN if shutting down cluster; during shutdown. Avoid the below messages:<a name="line.1200"></a>
+<span class="sourceLineNo">1201</span> // 2018-08-13 10:45:10,551 WARN ...AssignmentManager: No matching procedure found for<a name="line.1201"></a>
+<span class="sourceLineNo">1202</span> // rit=OPEN, location=ve0538.halxg.cloudera.com,16020,1533493000958,<a name="line.1202"></a>
+<span class="sourceLineNo">1203</span> // table=IntegrationTestBigLinkedList, region=65ab289e2fc1530df65f6c3d7cde7aa5 transition<a name="line.1203"></a>
+<span class="sourceLineNo">1204</span> // to CLOSED<a name="line.1204"></a>
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+<span class="sourceLineNo">1239</span> throw new UnexpectedStateException(<a name="line.1239"></a>
+<span class="sourceLineNo">1240</span> "unsupported split regionState=" + state + " for parent region " + parent<a name="line.1240"></a>
+<span class="sourceLineNo">1241</span> + " maybe an old RS (< 2.0) had the operation in progress");<a name="line.1241"></a>
+<span class="sourceLineNo">1242</span> }<a name="line.1242"></a>
+<span class="sourceLineNo">1243</span><a name="line.1243"></a>
+<span class="sourceLineNo">1244</span> // sanity check on the request<a name="line.1244"></a>
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+<span class="sourceLineNo">1247</span> + parent + " hriA=" + hriA + " hriB=" + hriB);<a name="line.1247"></a>
+<span class="sourceLineNo">1248</span> }<a name="line.1248"></a>
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+<span class="sourceLineNo">1254</span> }<a name="line.1254"></a>
+<span class="sourceLineNo">1255</span><a name="line.1255"></a>
+<span class="sourceLineNo">1256</span> // Submit the Split procedure<a name="line.1256"></a>
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+<span class="sourceLineNo">1258</span> if (LOG.isDebugEnabled()) {<a name="line.1258"></a>
+<span class="sourceLineNo">1259</span> LOG.debug("Split request from " + serverName + ", parent=" + parent + " splitKey="<a name="line.1259"></a>
+<span class="sourceLineNo">1260</span> + Bytes.toStringBinary(splitKey));<a name="line.1260"></a>
+<span class="sourceLineNo">1261</span> }<a name="line.1261"></a>
+<span class="sourceLineNo">1262</span> // Processing this report happens asynchronously from other activities which can mutate<a name="line.1262"></a>
+<span class="sourceLineNo">1263</span> // the region state. For example, a split procedure may already be running for this parent.<a name="line.1263"></a>
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+<span class="sourceLineNo">1265</span> // ignore it in that case.<a name="line.1265"></a>
+<span class="sourceLineNo">1266</span> // Note that submitting more than one split procedure for a given region is<a name="line.1266"></a>
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+<span class="sourceLineNo">1268</span> // the logs. Only one procedure can succeed. The other procedure(s) would abort during<a name="line.1268"></a>
+<span class="sourceLineNo">1269</span> // initialization and report failure with WARN level logging.<a name="line.1269"></a>
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+<span class="sourceLineNo">1271</span> if (parentState != null && parentState.isOpened()) {<a name="line.1271"></a>
+<span class="sourceLineNo">1272</span> master.getMasterProcedureExecutor().submitProcedure(createSplitProcedure(parent, splitKey));<a name="line.1272"></a>
+<span class="sourceLineNo">1273</span> } else {<a name="line.1273"></a>
+<span class="sourceLineNo">1274</span> LOG.info("Ignoring split request from " + serverName + ", parent=" + parent<a name="line.1274"></a>
+<span class="sourceLineNo">1275</span> + " because parent is unknown or not open");<a name="line.1275"></a>
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+<span class="sourceLineNo">1277</span> }<a name="line.1277"></a>
+<span class="sourceLineNo">1278</span><a name="line.1278"></a>
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+<span class="sourceLineNo">1282</span> String.format("Split handled by the master: " + "parent=%s hriA=%s hriB=%s",<a name="line.1282"></a>
+<span class="sourceLineNo">1283</span> parent.getShortNameToLog(), hriA, hriB));<a name="line.1283"></a>
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+<span class="sourceLineNo">1285</span> }<a name="line.1285"></a>
+<span class="sourceLineNo">1286</span><a name="line.1286"></a>
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+<span class="sourceLineNo">1293</span> "Unsupported merge regionState=" + state + " for regionA=" + hriA + " regionB=" + hriB<a name="line.1293"></a>
+<span class="sourceLineNo">1294</span> + " merged=" + merged + " maybe an old RS (< 2.0) had the operation in progress");<a name="line.1294"></a>
+<span class="sourceLineNo">1295</span> }<a name="line.1295"></a>
+<span class="sourceLineNo">1296</span><a name="line.1296"></a>
+<span class="sourceLineNo">1297</span> if (!master.isSplitOrMergeEnabled(MasterSwitchType.MERGE)) {<a name="line.1297"></a>
+<span class="sourceLineNo">1298</span> LOG.warn("Merge switch is off! skip merge of regionA=" + hriA + " regionB=" + hriB);<a name="line.1298"></a>
+<span class="sourceLineNo">1299</span> throw new DoNotRetryIOException(<a name="line.1299"></a>
+<span class="sourceLineNo">1300</span> "Merge of regionA=" + hriA + " regionB=" + hriB + " failed because merge switch is off");<a name="line.1300"></a>
+<span class="sourceLineNo">1301</span> }<a name="line.1301"></a>
+<span class="sourceLineNo">1302</span><a name="line.1302"></a>
+<span class="sourceLineNo">1303</span> // Submit the Merge procedure<a name="line.1303"></a>
+<span class="sourceLineNo">1304</span> if (LOG.isDebugEnabled()) {<a name="line.1304"></a>
+<span class="sourceLineNo">1305</span> LOG.debug("Handling merge request from RS=" + merged + ", merged=" + merged);<a name="line.1305"></a>
+<span class="sourceLineNo">1306</span> }<a name="line.1306"></a>
+<span class="sourceLineNo">1307</span> master.getMasterProcedureExecutor().submitProcedure(createMergeProcedure(hriA, hriB));<a name="line.1307"></a>
+<span class="sourceLineNo">1308</span><a name="line.1308"></a>
+<span class="sourceLineNo">1309</span> // If the RS is < 2.0 throw an exception to abort the operation, we are handling the merge<a name="line.1309"></a>
+<span class="sourceLineNo">1310</span> if (master.getServerManager().getVersionNumber(serverName) < 0x0200000) {<a name="line.1310"></a>
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+<span class="sourceLineNo">1312</span> String.format("Merge not handled yet: regionState=%s merged=%s hriA=%s hriB=%s", state,<a name="line.1312"></a>
+<span class="sourceLineNo">1313</span> merged, hriA, hriB));<a name="line.1313"></a>
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+<span class="sourceLineNo">1315</span> }<a name="line.1315"></a>
+<span class="sourceLineNo">1316</span><a name="line.1316"></a>
+<span class="sourceLineNo">1317</span> // ============================================================================================<a name="line.1317"></a>
+<span class="sourceLineNo">1318</span> // RS Status update (report online regions) helpers<a name="line.1318"></a>
<span class="sourceLineNo">1319</span> // ============================================================================================<a name="line.1319"></a>
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-<span class="sourceLineNo">1322</span> /**<a name="line.1322"></a>
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-<span class="sourceLineNo">1328</span> * actually there is no problem.<a name="line.1328"></a>
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-<span class="sourceLineNo">1337</span> LOG.trace("ReportOnlineRegions {} regionCount={}, metaLoaded={} {}", serverName,<a name="line.1337"></a>
-<span class="sourceLineNo">1338</span> regionNames.size(), isMetaLoaded(),<a name="line.1338"></a>
-<span class="sourceLineNo">1339</span> regionNames.stream().map(Bytes::toStringBinary).collect(Collectors.toList()));<a name="line.1339"></a>
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-<span class="sourceLineNo">1345</span> LOG.warn("Got a report from a server result in state " + serverNode.getState());<a name="line.1345"></a>
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-<span class="sourceLineNo">1350</span> // Track the regionserver reported online regions in memory.<a name="line.1350"></a>
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-<span class="sourceLineNo">1368</span> /**<a name="line.1368"></a>
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-<span class="sourceLineNo">1372</span> * accounting.<a name="line.1372"></a>
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-<span class="sourceLineNo">1397</span> LOG.warn("No RegionStateNode for {} but reported as up on {}; closing...", regionNameAsStr,<a name="line.1397"></a>
-<span class="sourceLineNo">1398</span> serverName);<a name="line.1398"></a>
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+<span class="sourceLineNo">1339</span><a name="line.1339"></a>
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+<span class="sourceLineNo">1343</span> LOG.warn("Got a report from a server result in state " + serverNode.getState());<a name="line.1343"></a>
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+<span class="sourceLineNo">1346</span> }<a name="line.1346"></a>
+<span class="sourceLineNo">1347</span><a name="line.1347"></a>
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+<span class="sourceLineNo">1361</span> }<a name="line.1361"></a>
+<span class="sourceLineNo">1362</span> // The Heartbeat tells us of what regions are on the region serve, check the state.<a name="line.1362"></a>
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+<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> /**<a name="line.1366"></a>
+<span class="sourceLineNo">1367</span> * Close <code>regionName</code> on <code>sn</code> silently and immediately without using a<a name="line.1367"></a>
+<span class="sourceLineNo">1368</span> * Procedure or going via hbase:meta. For case where a RegionServer's hosting of a Region is not<a name="line.1368"></a>
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+<span class="sourceLineNo">1370</span> * accounting.<a name="line.1370"></a>
+<span class="sourceLineNo">1371</span> */<a name="line.1371"></a>
+<span class="sourceLineNo">1372</span> private void closeRegionSilently(ServerName sn, byte[] regionName) {<a name="line.1372"></a>
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+<span class="sourceLineNo">1374</span> RegionInfo ri = CatalogFamilyFormat.parseRegionInfoFromRegionName(regionName);<a name="line.1374"></a>
+<span class="sourceLineNo">1375</span> // Pass -1 for timeout. Means do not wait.<a name="line.1375"></a>
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+<span class="sourceLineNo">1378</span> LOG.error("Failed trying to close {} on {}", Bytes.toStringBinary(regionName), sn, e);<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><a name="line.1381"></a>
+<span class="sourceLineNo">1382</span> /**<a name="line.1382"></a>
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+<span class="sourceLineNo">1385</span> */<a name="line.1385"></a>
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+<span class="sourceLineNo">1388</span> for (byte[] regionName : regionNames) {<a name="line.1388"></a>
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+<span class="sourceLineNo">1390</span> return;<a name="line.1390"></a>
+<span class="sourceLineNo">1391</span> }<a name="line.1391"></a>
+<span class="sourceLineNo">1392</span> RegionStateNode regionNode = regionStates.getRegionStateNodeFromName(regionName);<a name="line.1392"></a>
+<span class="sourceLineNo">1393</span> if (regionNode == null) {<a name="line.1393"></a>
+<span class="sourceLineNo">1394</span> String regionNameAsStr = Bytes.toStringBinary(regionName);<a name="line.1394"></a>
+<span class="sourceLineNo">1395</span> LOG.warn("No RegionStateNode for {} but reported as up on {}; closing...", regionNameAsStr,<a name="line.1395"></a>
+<span class="sourceLineNo">1396</span> serverName);<a name="line.1396"></a>
+<span class="sourceLineNo">1397</span> closeRegionSilently(serverNode.getServerName(), regionName);<a name="line.1397"></a>
+<span class="sourceLineNo">1398</span> continue;<a name="line.1398"></a>
+<span class="sourceLineNo">1399</span> }<a name="line.1399"></a>
+<span class="sourceLineNo">1400</span> final long lag = 1000;<a name="line.1400"></a>
+<span class="sourceLineNo">1401</span> regionNode.lock();<a name="line.1401"></a>
+<span class="sourceLineNo">1402</span> try {<a name="line.1402"></a>
+<span class="sourceLineNo">1403</span> long diff = EnvironmentEdgeManager.currentTime() - regionNode.getLastUpdate();<a name="line.1403"></a>
+<span class="sourceLineNo">1404</span> if (regionNode.isInState(State.OPENING, State.OPEN)) {<a name="line.1404"></a>
+<span class="sourceLineNo">1405</span> // This is possible as a region server has just closed a region but the region server<a name="line.1405"></a>
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+<span class="sourceLineNo">1409</span> LOG.warn("Reporting {} server does not match {} (time since last "<a name="line.1409"></a>
+<span class="sourceLineNo">1410</span> + "update={}ms); closing...", serverName, regionNode, diff);<a name="line.1410"></a>
+<span class="sourceLineNo">1411</span> closeRegionSilently(serverNode.getServerName(), regionName);<a name="line.1411"></a>
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+<span class="sourceLineNo">1416</span> // elapsed time so less false alarms.<a name="line.1416"></a>
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+<span class="sourceLineNo">1418</span> LOG.warn("Reporting {} state does not match {} (time since last update={}ms)",<a name="line.1418"></a>
+<span class="sourceLineNo">1419</span> serverName, regionNode, diff);<a name="line.1419"></a>
+<span class="sourceLineNo">1420</span> }<a name="line.1420"></a>
+<span class="sourceLineNo">1421</span> }<a name="line.1421"></a>
+<span class="sourceLineNo">1422</span> } finally {<a name="line.1422"></a>
+<span class="sourceLineNo">1423</span> regionNode.unlock();<a name="line.1423"></a>
+<span class="sourceLineNo">1424</span> }<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><a name="line.1427"></a>
+<span class="sourceLineNo">1428</span> // ============================================================================================<a name="line.1428"></a>
+<span class="sourceLineNo">1429</span> // RIT chore<a name="line.1429"></a>
<span class="sourceLineNo">1430</span> // ============================================================================================<a name="line.1430"></a>
-<span class="sourceLineNo">1431</span> // RIT chore<a name="line.1431"></a>
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-<span class="sourceLineNo">1444</span> for (RegionState hri : ritStat.getRegionOverThreshold()) {<a name="line.1444"></a>
-<span class="sourceLineNo">1445</span> am.handleRegionOverStuckWarningThreshold(hri.getRegion());<a name="line.1445"></a>
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-<span class="sourceLineNo">1447</span> }<a name="line.1447"></a>
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-<span class="sourceLineNo">1449</span> // update metrics<a name="line.1449"></a>
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-<span class="sourceLineNo">1465</span> // new servers are added; OTOH we don't want to add heavy sync for a consistent view since<a name="line.1465"></a>
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-<span class="sourceLineNo">1467</span> // too many checks, we maintain a local lists of server, limiting us to false negatives. If<a name="line.1467"></a>
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-<span class="sourceLineNo">1604</span> LOG.warn("The RIT {} has no start time", state.getRegion());<a name="line.1604"></a>
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+<span class="sourceLineNo">1446</span><a name="line.1446"></a>
+<span class="sourceLineNo">1447</span> // update metrics<a name="line.1447"></a>
+<span class="sourceLineNo">1448</span> am.updateRegionsInTransitionMetrics(ritStat);<a name="line.1448"></a>
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+<span class="sourceLineNo">1451</span><a name="line.1451"></a>
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+<span class="sourceLineNo">1457</span><a name="line.1457"></a>
+<span class="sourceLineNo">1458</span> @Override<a name="line.1458"></a>
+<span class="sourceLineNo">1459</span> protected void periodicExecute(final MasterProcedureEnv env) {<a name="line.1459"></a>
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+<span class="sourceLineNo">1462</span> // To minimize inconsistencies we are not going to snapshot live servers in advance in case<a name="line.1462"></a>
+<span class="sourceLineNo">1463</span> // new servers are added; OTOH we don't want to add heavy sync for a consistent view since<a name="line.1463"></a>
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+<span class="sourceLineNo">1467</span> Set<ServerName> recentlyLiveServers = new HashSet<>();<a name="line.1467"></a>
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+<span class="sourceLineNo">1473</span> // Do not need to acquire region state lock as this is only for showing metrics.<a name="line.1473"></a>
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+<span class="sourceLineNo">1488</span> case LIVE:<a name="line.1488"></a>
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<span class="sourceLineNo">1639</span> // ============================================================================================<a name="line.1639"></a>
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-<span class="sourceLineNo">1802</span><a name="line.1802"></a>
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+<span class="sourceLineNo">1642</span> LOG.debug("Joining cluster...");<a name="line.1642"></a>
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+<span class="sourceLineNo">1646</span> // w/o meta.<a name="line.1646"></a>
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+<span class="sourceLineNo">1648</span><a name="line.1648"></a>
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+<span class="sourceLineNo">1655</span><a name="line.1655"></a>
+<span class="sourceLineNo">1656</span> // Start the chores<a name="line.1656"></a>
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+<span class="sourceLineNo">1658</span> master.getMasterProcedureExecutor().addChore(this.deadMetricChore);<a name="line.1658"></a>
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+<span class="sourceLineNo">1663</span><a name="line.1663"></a>
+<span class="sourceLineNo">1664</span> /**<a name="line.1664"></a>
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+<span class="sourceLineNo">1671</span> * method any more. Need to revisit later.<a name="line.1671"></a>
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+<span class="sourceLineNo">1674</span> // Needs to be done after the table state manager has been started.<a name="line.1674"></a>
+<span class="sourceLineNo">1675</span> public void processOfflineRegions() {<a name="line.1675"></a>
+<span class="sourceLineNo">1676</span> TransitRegionStateProcedure[] procs =<a name="line.1676"></a>
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+<span class="sourceLineNo">1687</span> } finally {<a name="line.1687"></a>
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+<span class="sourceLineNo">1694</span> }<a name="line.1694"></a>
+<span class="sourceLineNo">1695</span><a name="line.1695"></a>
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+<span class="sourceLineNo">1699</span> * convert Result into proper RegionInfo instances, but those would still need to be added into<a name="line.1699"></a>
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+<span class="sourceLineNo">1702</span> * AssignmentManager.regionStates.<a name="line.1702"></a>
+<span class="sourceLineNo">1703</span> */<a name="line.1703"></a>
+<span class="sourceLineNo">1704</span> private class RegionMetaLoadingVisitor implements RegionStateStore.RegionStateVisitor {<a name="line.1704"></a>
+<span class="sourceLineNo">1705</span><a name="line.1705"></a>
+<span class="sourceLineNo">1706</span> @Override<a name="line.1706"></a>
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+<span class="sourceLineNo">1708</span> final ServerName regionLocation, final ServerName lastHost, final long openSeqNum) {<a name="line.1708"></a>
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+<span class="sourceLineNo">1712</span> ) {<a name="line.1712"></a>
+<span class="sourceLineNo">1713</span> // This is a row with nothing in it.<a name="line.1713"></a>
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+<span class="sourceLineNo">1720</span> // hbase1 to hbase2? Am I restoring a SNAPSHOT or otherwise adding a region to hbase:meta?<a name="line.1720"></a>
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+<span class="sourceLineNo">1722</span> // cases where we need to probe more to be sure this correct; TODO informed by experience.<a name="line.1722"></a>
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+<span class="sourceLineNo">1724</span> localState = State.OFFLINE;<a name="line.1724"></a>
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+<span class="sourceLineNo">1729</span> // region related operations, but here we do not load the informations for meta region.<a name="line.1729"></a>
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+<span class="sourceLineNo">1731</span> regionNode.setLastHost(lastHost);<a name="line.1731"></a>
+<span class="sourceLineNo">1732</span> regionNode.setRegionLocation(regionLocation);<a name="line.1732"></a>
+<span class="sourceLineNo">1733</span> regionNode.setOpenSeqNum(openSeqNum);<a name="line.1733"></a>
+<span class="sourceLineNo">1734</span><a name="line.1734"></a>
+<span class="sourceLineNo">1735</span> // Note: keep consistent with other methods, see region(Opening|Opened|Closing)<a name="line.1735"></a>
+<span class="sourceLineNo">1736</span> // RIT/ServerCrash handling should take care of the transiting regions.<a name="line.1736"></a>
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+<span class="sourceLineNo">1739</span> ) {<a name="line.1739"></a>
+<span class="sourceLineNo">1740</span> assert regionLocation != null : "found null region location for " + regionNode;<a name="line.1740"></a>
+<span class="sourceLineNo">1741</span> regionStates.addRegionToServer(regionNode);<a name="line.1741"></a>
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+<span class="sourceLineNo">1748</span> }<a name="line.1748"></a>
+<span class="sourceLineNo">1749</span> };<a name="line.1749"></a>
+<span class="sourceLineNo">1750</span><a name="line.1750"></a>
+<span class="sourceLineNo">1751</span> /**<a name="line.1751"></a>
+<span class="sourceLineNo">1752</span> * Attempt to load {@code regionInfo} from META, adding any results to the<a name="line.1752"></a>
+<span class="sourceLineNo">1753</span> * {@link #regionStateStore} Is NOT aware of replica regions.<a name="line.1753"></a>
+<span class="sourceLineNo">1754</span> * @param regionInfo the region to be loaded from META.<a name="line.1754"></a>
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+<span class="sourceLineNo">1756</span> */<a name="line.1756"></a>
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+<span class="sourceLineNo">1758</span> throws IOException {<a name="line.1758"></a>
+<span class="sourceLineNo">1759</span> final String regionEncodedName = RegionInfo.DEFAULT_REPLICA_ID == regionInfo.getReplicaId()<a name="line.1759"></a>
+<span class="sourceLineNo">1760</span> ? regionInfo.getEncodedName()<a name="line.1760"></a>
+<span class="sourceLineNo">1761</span> : RegionInfoBuilder.newBuilder(regionInfo).setReplicaId(RegionInfo.DEFAULT_REPLICA_ID).build()<a name="line.1761"></a>
+<span class="sourceLineNo">1762</span> .getEncodedName();<a name="line.1762"></a>
+<span class="sourceLineNo">1763</span> populateRegionStatesFromMeta(regionEncodedName);<a name="line.1763"></a>
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+<span class="sourceLineNo">1765</span><a name="line.1765"></a>
+<span class="sourceLineNo">1766</span> /**<a name="line.1766"></a>
+<span class="sourceLineNo">1767</span> * Attempt to load {@code regionEncodedName} from META, adding any results to the<a name="line.1767"></a>
+<span class="sourceLineNo">1768</span> * {@link #regionStateStore} Is NOT aware of replica regions.<a name="line.1768"></a>
+<span class="sourceLineNo">1769</span> * @param regionEncodedName encoded name for the region to be loaded from META.<a name="line.1769"></a>
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+<span class="sourceLineNo">1771</span> */<a name="line.1771"></a>
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+<span class="sourceLineNo">1773</span> final RegionMetaLoadingVisitor visitor = new RegionMetaLoadingVisitor();<a name="line.1773"></a>
+<span class="sourceLineNo">1774</span> regionStateStore.visitMetaForRegion(regionEncodedName, visitor);<a name="line.1774"></a>
+<span class="sourceLineNo">1775</span> }<a name="line.1775"></a>
+<span class="sourceLineNo">1776</span><a name="line.1776"></a>
+<span class="sourceLineNo">1777</span> private void loadMeta() throws IOException {<a name="line.1777"></a>
+<span class="sourceLineNo">1778</span> // TODO: use a thread pool<a name="line.1778"></a>
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+<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> /**<a name="line.1782"></a>
+<span class="sourceLineNo">1783</span> * Used to check if the meta loading is done.<a name="line.1783"></a>
+<span class="sourceLineNo">1784</span> * <p/><a name="line.1784"></a>
+<span class="sourceLineNo">1785</span> * if not we throw PleaseHoldException since we are rebuilding the RegionStates<a name="line.1785"></a>
+<span class="sourceLineNo">1786</span> * @param hri region to check if it is already rebuild<a name="line.1786"></a>
+<span class="sourceLineNo">1787</span> * @throws PleaseHoldException if meta has not been loaded yet<a name="line.1787"></a>
+<span class="sourceLineNo">1788</span> */<a name="line.1788"></a>
+<span class="sourceLineNo">1789</span> private void checkMetaLoaded(RegionInfo hri) throws PleaseHoldException {<a name="line.1789"></a>
+<span class="sourceLineNo">1790</span> if (!isRunning()) {<a name="line.1790"></a>
+<span class="sourceLineNo">1791</span> throw new PleaseHoldException("AssignmentManager not running");<a name="line.1791"></a>
+<span class="sourceLineNo">1792</span> }<a name="line.1792"></a>
+<span class="sourceLineNo">1793</span> boolean meta = isMetaRegion(hri);<a name="line.1793"></a>
+<span class="sourceLineNo">1794</span> boolean metaLoaded = isMetaLoaded();<a name="line.1794"></a>
+<span class="sourceLineNo">1795</span> if (!meta && !metaLoaded) {<a name="line.1795"></a>
+<span class="sourceLineNo">1796</span> throw new PleaseHoldException(<a name="line.1796"></a>
+<span class="sourceLineNo">1797</span> "Master not fully online; hbase:meta=" + meta + ", metaLoaded=" + metaLoaded);<a name="line.1797"></a>
+<span class="sourceLineNo">1798</span> }<a name="line.1798"></a>
+<span class="sourceLineNo">1799</span> }<a name="line.1799"></a>
+<span class="sourceLineNo">1800</span><a name="line.1800"></a>
+<span class="sourceLineNo">1801</span> // ============================================================================================<a name="line.1801"></a>
+<span class="sourceLineNo">1802</span> // TODO: Metrics<a name="line.1802"></a>
<span class="sourceLineNo">1803</span> // ============================================================================================<a name="line.1803"></a>
-<span class="sourceLineNo">1804</span> // TODO: Metrics<a name="line.1804"></a>
-<span class="sourceLineNo">1805</span> // ============================================================================================<a name="line.1805"></a>
-<span class="sourceLineNo">1806</span> public int getNumRegionsOpened() {<a name="line.1806"></a>
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-<span class="sourceLineNo">1810</span><a name="line.1810"></a>
-<span class="sourceLineNo">1811</span> /**<a name="line.1811"></a>
-<span class="sourceLineNo">1812</span> * Usually run by the Master in reaction to server crash during normal processing. Can also be<a name="line.1812"></a>
-<span class="sourceLineNo">1813</span> * invoked via external RPC to effect repair; in the latter case, the 'force' flag is set so we<a name="line.1813"></a>
-<span class="sourceLineNo">1814</span> * push through the SCP though context may indicate already-running-SCP (An old SCP may have<a name="line.1814"></a>
-<span class="sourceLineNo">1815</span> * exited abnormally, or damaged cluster may still have references in hbase:meta to 'Unknown<a name="line.1815"></a>
-<span class="sourceLineNo">1816</span> * Servers' -- servers that are not online or in dead servers list, etc.)<a name="line.1816"></a>
-<span class="sourceLineNo">1817</span> * @param force Set if the request came in externally over RPC (via hbck2). Force means run the<a name="line.1817"></a>
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<span class="sourceLineNo">1893</span> // ============================================================================================<a name="line.1893"></a>
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<span class="sourceLineNo">1915</span> // ============================================================================================<a name="line.1915"></a>
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+<span class="sourceLineNo">2488</span> } else if (regionState.isSplit()) {<a name="line.2488"></a>
+<span class="sourceLineNo">2489</span> splitRegionCount++;<a name="line.2489"></a>
+<span class="sourceLineNo">2490</span> }<a name="line.2490"></a>
+<span class="sourceLineNo">2491</span> }<a name="line.2491"></a>
+<span class="sourceLineNo">2492</span> totalRegionCount = states.size();<a name="line.2492"></a>
+<span class="sourceLineNo">2493</span> ritCount = totalRegionCount - openRegionsCount - splitRegionCount;<a name="line.2493"></a>
+<span class="sourceLineNo">2494</span> }<a name="line.2494"></a>
+<span class="sourceLineNo">2495</span> return new RegionStatesCount.RegionStatesCountBuilder().setOpenRegions(openRegionsCount)<a name="line.2495"></a>
+<span class="sourceLineNo">2496</span> .setClosedRegions(closedRegionCount).setSplitRegions(splitRegionCount)<a name="line.2496"></a>
+<span class="sourceLineNo">2497</span> .setRegionsInTransition(ritCount).setTotalRegions(totalRegionCount).build();<a name="line.2497"></a>
+<span class="sourceLineNo">2498</span> }<a name="line.2498"></a>
+<span class="sourceLineNo">2499</span><a name="line.2499"></a>
+<span class="sourceLineNo">2500</span>}<a name="line.2500"></a>
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionChore.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionChore.html
index ea172726b4e..09f2091a100 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionChore.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionChore.html
@@ -1102,1412 +1102,1410 @@
<span class="sourceLineNo">1094</span> regionStateStore.deleteRegions(regions);<a name="line.1094"></a>
<span class="sourceLineNo">1095</span> for (int i = 0; i < regions.size(); ++i) {<a name="line.1095"></a>
<span class="sourceLineNo">1096</span> final RegionInfo regionInfo = regions.get(i);<a name="line.1096"></a>
-<span class="sourceLineNo">1097</span> // we expect the region to be offline<a name="line.1097"></a>
-<span class="sourceLineNo">1098</span> regionStates.removeFromOfflineRegions(regionInfo);<a name="line.1098"></a>
-<span class="sourceLineNo">1099</span> regionStates.deleteRegion(regionInfo);<a name="line.1099"></a>
-<span class="sourceLineNo">1100</span> }<a name="line.1100"></a>
-<span class="sourceLineNo">1101</span> }<a name="line.1101"></a>
-<span class="sourceLineNo">1102</span><a name="line.1102"></a>
+<span class="sourceLineNo">1097</span> regionStates.deleteRegion(regionInfo);<a name="line.1097"></a>
+<span class="sourceLineNo">1098</span> }<a name="line.1098"></a>
+<span class="sourceLineNo">1099</span> }<a name="line.1099"></a>
+<span class="sourceLineNo">1100</span><a name="line.1100"></a>
+<span class="sourceLineNo">1101</span> // ============================================================================================<a name="line.1101"></a>
+<span class="sourceLineNo">1102</span> // RS Region Transition Report helpers<a name="line.1102"></a>
<span class="sourceLineNo">1103</span> // ============================================================================================<a name="line.1103"></a>
-<span class="sourceLineNo">1104</span> // RS Region Transition Report helpers<a name="line.1104"></a>
-<span class="sourceLineNo">1105</span> // ============================================================================================<a name="line.1105"></a>
-<span class="sourceLineNo">1106</span> private void reportRegionStateTransition(ReportRegionStateTransitionResponse.Builder builder,<a name="line.1106"></a>
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-<span class="sourceLineNo">1108</span> for (RegionStateTransition transition : transitionList) {<a name="line.1108"></a>
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-<span class="sourceLineNo">1110</span> case OPENED:<a name="line.1110"></a>
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-<span class="sourceLineNo">1114</span> final RegionInfo hri = ProtobufUtil.toRegionInfo(transition.getRegionInfo(0));<a name="line.1114"></a>
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-<span class="sourceLineNo">1116</span> transition.getProcIdCount() > 0 ? transition.getProcId(0) : Procedure.NO_PROC_ID;<a name="line.1116"></a>
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-<span class="sourceLineNo">1118</span> transition.hasOpenSeqNum() ? transition.getOpenSeqNum() : HConstants.NO_SEQNUM, procId);<a name="line.1118"></a>
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-<span class="sourceLineNo">1124</span> final RegionInfo parent = ProtobufUtil.toRegionInfo(transition.getRegionInfo(0));<a name="line.1124"></a>
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-<span class="sourceLineNo">1126</span> final RegionInfo splitB = ProtobufUtil.toRegionInfo(transition.getRegionInfo(2));<a name="line.1126"></a>
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-<span class="sourceLineNo">1134</span> final RegionInfo merged = ProtobufUtil.toRegionInfo(transition.getRegionInfo(0));<a name="line.1134"></a>
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-<span class="sourceLineNo">1148</span> ServerName serverName = ProtobufUtil.toServerName(req.getServer());<a name="line.1148"></a>
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-<span class="sourceLineNo">1154</span> // reportRegionStateTransition for meta, and since meta is not online, you will block inside the<a name="line.1154"></a>
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-<span class="sourceLineNo">1173</span> LOG.warn("The region server {} is already dead, skip reportRegionStateTransition call",<a name="line.1173"></a>
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-<span class="sourceLineNo">1175</span> builder.setErrorMessage("You are dead");<a name="line.1175"></a>
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-<span class="sourceLineNo">1181</span> return builder.build();<a name="line.1181"></a>
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-<span class="sourceLineNo">1188</span> RegionStateNode regionNode = regionStates.getRegionStateNode(regionInfo);<a name="line.1188"></a>
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-<span class="sourceLineNo">1192</span> "Server %s was trying to transition region %s to %s. but Region is not known.", serverName,<a name="line.1192"></a>
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-<span class="sourceLineNo">1198</span> ServerStateNode serverNode = regionStates.getOrCreateServer(serverName);<a name="line.1198"></a>
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-<span class="sourceLineNo">1202</span> // Don't log WARN if shutting down cluster; during shutdown. Avoid the below messages:<a name="line.1202"></a>
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-<span class="sourceLineNo">1204</span> // rit=OPEN, location=ve0538.halxg.cloudera.com,16020,1533493000958,<a name="line.1204"></a>
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-<span class="sourceLineNo">1206</span> // to CLOSED<a name="line.1206"></a>
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-<span class="sourceLineNo">1262</span> + Bytes.toStringBinary(splitKey));<a name="line.1262"></a>
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-<span class="sourceLineNo">1296</span> + " merged=" + merged + " maybe an old RS (< 2.0) had the operation in progress");<a name="line.1296"></a>
-<span class="sourceLineNo">1297</span> }<a name="line.1297"></a>
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-<span class="sourceLineNo">1302</span> "Merge of regionA=" + hriA + " regionB=" + hriB + " failed because merge switch is off");<a name="line.1302"></a>
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-<span class="sourceLineNo">1305</span> // Submit the Merge procedure<a name="line.1305"></a>
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-<span class="sourceLineNo">1307</span> LOG.debug("Handling merge request from RS=" + merged + ", merged=" + merged);<a name="line.1307"></a>
-<span class="sourceLineNo">1308</span> }<a name="line.1308"></a>
-<span class="sourceLineNo">1309</span> master.getMasterProcedureExecutor().submitProcedure(createMergeProcedure(hriA, hriB));<a name="line.1309"></a>
-<span class="sourceLineNo">1310</span><a name="line.1310"></a>
-<span class="sourceLineNo">1311</span> // If the RS is < 2.0 throw an exception to abort the operation, we are handling the merge<a name="line.1311"></a>
-<span class="sourceLineNo">1312</span> if (master.getServerManager().getVersionNumber(serverName) < 0x0200000) {<a name="line.1312"></a>
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-<span class="sourceLineNo">1317</span> }<a name="line.1317"></a>
-<span class="sourceLineNo">1318</span><a name="line.1318"></a>
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+<span class="sourceLineNo">1106</span> for (RegionStateTransition transition : transitionList) {<a name="line.1106"></a>
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+<span class="sourceLineNo">1108</span> case OPENED:<a name="line.1108"></a>
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+<span class="sourceLineNo">1110</span> case CLOSED:<a name="line.1110"></a>
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+<span class="sourceLineNo">1114</span> transition.getProcIdCount() > 0 ? transition.getProcId(0) : Procedure.NO_PROC_ID;<a name="line.1114"></a>
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+<span class="sourceLineNo">1118</span> case READY_TO_SPLIT:<a name="line.1118"></a>
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+<span class="sourceLineNo">1120</span> case SPLIT_REVERTED:<a name="line.1120"></a>
+<span class="sourceLineNo">1121</span> assert transition.getRegionInfoCount() == 3 : transition;<a name="line.1121"></a>
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+<span class="sourceLineNo">1124</span> final RegionInfo splitB = ProtobufUtil.toRegionInfo(transition.getRegionInfo(2));<a name="line.1124"></a>
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+<span class="sourceLineNo">1126</span> splitB);<a name="line.1126"></a>
+<span class="sourceLineNo">1127</span> break;<a name="line.1127"></a>
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+<span class="sourceLineNo">1129</span> case MERGED:<a name="line.1129"></a>
+<span class="sourceLineNo">1130</span> case MERGE_REVERTED:<a name="line.1130"></a>
+<span class="sourceLineNo">1131</span> assert transition.getRegionInfoCount() == 3 : transition;<a name="line.1131"></a>
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+<span class="sourceLineNo">1133</span> final RegionInfo mergeA = ProtobufUtil.toRegionInfo(transition.getRegionInfo(1));<a name="line.1133"></a>
+<span class="sourceLineNo">1134</span> final RegionInfo mergeB = ProtobufUtil.toRegionInfo(transition.getRegionInfo(2));<a name="line.1134"></a>
+<span class="sourceLineNo">1135</span> updateRegionMergeTransition(serverName, transition.getTransitionCode(), merged, mergeA,<a name="line.1135"></a>
+<span class="sourceLineNo">1136</span> mergeB);<a name="line.1136"></a>
+<span class="sourceLineNo">1137</span> break;<a name="line.1137"></a>
+<span class="sourceLineNo">1138</span> }<a name="line.1138"></a>
+<span class="sourceLineNo">1139</span> }<a name="line.1139"></a>
+<span class="sourceLineNo">1140</span> }<a name="line.1140"></a>
+<span class="sourceLineNo">1141</span><a name="line.1141"></a>
+<span class="sourceLineNo">1142</span> public ReportRegionStateTransitionResponse reportRegionStateTransition(<a name="line.1142"></a>
+<span class="sourceLineNo">1143</span> final ReportRegionStateTransitionRequest req) throws PleaseHoldException {<a name="line.1143"></a>
+<span class="sourceLineNo">1144</span> ReportRegionStateTransitionResponse.Builder builder =<a name="line.1144"></a>
+<span class="sourceLineNo">1145</span> ReportRegionStateTransitionResponse.newBuilder();<a name="line.1145"></a>
+<span class="sourceLineNo">1146</span> ServerName serverName = ProtobufUtil.toServerName(req.getServer());<a name="line.1146"></a>
+<span class="sourceLineNo">1147</span> ServerStateNode serverNode = regionStates.getOrCreateServer(serverName);<a name="line.1147"></a>
+<span class="sourceLineNo">1148</span> // here we have to acquire a read lock instead of a simple exclusive lock. This is because that<a name="line.1148"></a>
+<span class="sourceLineNo">1149</span> // we should not block other reportRegionStateTransition call from the same region server. This<a name="line.1149"></a>
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+<span class="sourceLineNo">1152</span> // reportRegionStateTransition for meta, and since meta is not online, you will block inside the<a name="line.1152"></a>
+<span class="sourceLineNo">1153</span> // lock protection to wait for meta online...<a name="line.1153"></a>
+<span class="sourceLineNo">1154</span> serverNode.readLock().lock();<a name="line.1154"></a>
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+<span class="sourceLineNo">1156</span> // we only accept reportRegionStateTransition if the region server is online, see the comment<a name="line.1156"></a>
+<span class="sourceLineNo">1157</span> // above in submitServerCrash method and HBASE-21508 for more details.<a name="line.1157"></a>
+<span class="sourceLineNo">1158</span> if (serverNode.isInState(ServerState.ONLINE)) {<a name="line.1158"></a>
+<span class="sourceLineNo">1159</span> try {<a name="line.1159"></a>
+<span class="sourceLineNo">1160</span> reportRegionStateTransition(builder, serverName, req.getTransitionList());<a name="line.1160"></a>
+<span class="sourceLineNo">1161</span> } catch (PleaseHoldException e) {<a name="line.1161"></a>
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+<span class="sourceLineNo">1163</span> throw e;<a name="line.1163"></a>
+<span class="sourceLineNo">1164</span> } catch (UnsupportedOperationException | IOException e) {<a name="line.1164"></a>
+<span class="sourceLineNo">1165</span> // TODO: at the moment we have a single error message and the RS will abort<a name="line.1165"></a>
+<span class="sourceLineNo">1166</span> // if the master says that one of the region transitions failed.<a name="line.1166"></a>
+<span class="sourceLineNo">1167</span> LOG.warn("Failed transition", e);<a name="line.1167"></a>
+<span class="sourceLineNo">1168</span> builder.setErrorMessage("Failed transition " + e.getMessage());<a name="line.1168"></a>
+<span class="sourceLineNo">1169</span> }<a name="line.1169"></a>
+<span class="sourceLineNo">1170</span> } else {<a name="line.1170"></a>
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+<span class="sourceLineNo">1172</span> serverName);<a name="line.1172"></a>
+<span class="sourceLineNo">1173</span> builder.setErrorMessage("You are dead");<a name="line.1173"></a>
+<span class="sourceLineNo">1174</span> }<a name="line.1174"></a>
+<span class="sourceLineNo">1175</span> } finally {<a name="line.1175"></a>
+<span class="sourceLineNo">1176</span> serverNode.readLock().unlock();<a name="line.1176"></a>
+<span class="sourceLineNo">1177</span> }<a name="line.1177"></a>
+<span class="sourceLineNo">1178</span><a name="line.1178"></a>
+<span class="sourceLineNo">1179</span> return builder.build();<a name="line.1179"></a>
+<span class="sourceLineNo">1180</span> }<a name="line.1180"></a>
+<span class="sourceLineNo">1181</span><a name="line.1181"></a>
+<span class="sourceLineNo">1182</span> private void updateRegionTransition(ServerName serverName, TransitionCode state,<a name="line.1182"></a>
+<span class="sourceLineNo">1183</span> RegionInfo regionInfo, long seqId, long procId) throws IOException {<a name="line.1183"></a>
+<span class="sourceLineNo">1184</span> checkMetaLoaded(regionInfo);<a name="line.1184"></a>
+<span class="sourceLineNo">1185</span><a name="line.1185"></a>
+<span class="sourceLineNo">1186</span> RegionStateNode regionNode = regionStates.getRegionStateNode(regionInfo);<a name="line.1186"></a>
+<span class="sourceLineNo">1187</span> if (regionNode == null) {<a name="line.1187"></a>
+<span class="sourceLineNo">1188</span> // the table/region is gone. maybe a delete, split, merge<a name="line.1188"></a>
+<span class="sourceLineNo">1189</span> throw new UnexpectedStateException(String.format(<a name="line.1189"></a>
+<span class="sourceLineNo">1190</span> "Server %s was trying to transition region %s to %s. but Region is not known.", serverName,<a name="line.1190"></a>
+<span class="sourceLineNo">1191</span> regionInfo, state));<a name="line.1191"></a>
+<span class="sourceLineNo">1192</span> }<a name="line.1192"></a>
+<span class="sourceLineNo">1193</span> LOG.trace("Update region transition serverName={} region={} regionState={}", serverName,<a name="line.1193"></a>
+<span class="sourceLineNo">1194</span> regionNode, state);<a name="line.1194"></a>
+<span class="sourceLineNo">1195</span><a name="line.1195"></a>
+<span class="sourceLineNo">1196</span> ServerStateNode serverNode = regionStates.getOrCreateServer(serverName);<a name="line.1196"></a>
+<span class="sourceLineNo">1197</span> regionNode.lock();<a name="line.1197"></a>
+<span class="sourceLineNo">1198</span> try {<a name="line.1198"></a>
+<span class="sourceLineNo">1199</span> if (!reportTransition(regionNode, serverNode, state, seqId, procId)) {<a name="line.1199"></a>
+<span class="sourceLineNo">1200</span> // Don't log WARN if shutting down cluster; during shutdown. Avoid the below messages:<a name="line.1200"></a>
+<span class="sourceLineNo">1201</span> // 2018-08-13 10:45:10,551 WARN ...AssignmentManager: No matching procedure found for<a name="line.1201"></a>
+<span class="sourceLineNo">1202</span> // rit=OPEN, location=ve0538.halxg.cloudera.com,16020,1533493000958,<a name="line.1202"></a>
+<span class="sourceLineNo">1203</span> // table=IntegrationTestBigLinkedList, region=65ab289e2fc1530df65f6c3d7cde7aa5 transition<a name="line.1203"></a>
+<span class="sourceLineNo">1204</span> // to CLOSED<a name="line.1204"></a>
+<span class="sourceLineNo">1205</span> // These happen because on cluster shutdown, we currently let the RegionServers close<a name="line.1205"></a>
+<span class="sourceLineNo">1206</span> // regions. This is the only time that region close is not run by the Master (so cluster<a name="line.1206"></a>
+<span class="sourceLineNo">1207</span> // goes down fast). Consider changing it so Master runs all shutdowns.<a name="line.1207"></a>
+<span class="sourceLineNo">1208</span> if (<a name="line.1208"></a>
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+<span class="sourceLineNo">1210</span> ) {<a name="line.1210"></a>
+<span class="sourceLineNo">1211</span> LOG.info("RegionServer {} {}", state, regionNode.getRegionInfo().getEncodedName());<a name="line.1211"></a>
+<span class="sourceLineNo">1212</span> } else {<a name="line.1212"></a>
+<span class="sourceLineNo">1213</span> LOG.warn("No matching procedure found for {} transition on {} to {}", serverName,<a name="line.1213"></a>
+<span class="sourceLineNo">1214</span> regionNode, state);<a name="line.1214"></a>
+<span class="sourceLineNo">1215</span> }<a name="line.1215"></a>
+<span class="sourceLineNo">1216</span> }<a name="line.1216"></a>
+<span class="sourceLineNo">1217</span> } finally {<a name="line.1217"></a>
+<span class="sourceLineNo">1218</span> regionNode.unlock();<a name="line.1218"></a>
+<span class="sourceLineNo">1219</span> }<a name="line.1219"></a>
+<span class="sourceLineNo">1220</span> }<a name="line.1220"></a>
+<span class="sourceLineNo">1221</span><a name="line.1221"></a>
+<span class="sourceLineNo">1222</span> private boolean reportTransition(RegionStateNode regionNode, ServerStateNode serverNode,<a name="line.1222"></a>
+<span class="sourceLineNo">1223</span> TransitionCode state, long seqId, long procId) throws IOException {<a name="line.1223"></a>
+<span class="sourceLineNo">1224</span> ServerName serverName = serverNode.getServerName();<a name="line.1224"></a>
+<span class="sourceLineNo">1225</span> TransitRegionStateProcedure proc = regionNode.getProcedure();<a name="line.1225"></a>
+<span class="sourceLineNo">1226</span> if (proc == null) {<a name="line.1226"></a>
+<span class="sourceLineNo">1227</span> return false;<a name="line.1227"></a>
+<span class="sourceLineNo">1228</span> }<a name="line.1228"></a>
+<span class="sourceLineNo">1229</span> proc.reportTransition(master.getMasterProcedureExecutor().getEnvironment(), regionNode,<a name="line.1229"></a>
+<span class="sourceLineNo">1230</span> serverName, state, seqId, procId);<a name="line.1230"></a>
+<span class="sourceLineNo">1231</span> return true;<a name="line.1231"></a>
+<span class="sourceLineNo">1232</span> }<a name="line.1232"></a>
+<span class="sourceLineNo">1233</span><a name="line.1233"></a>
+<span class="sourceLineNo">1234</span> private void updateRegionSplitTransition(final ServerName serverName, final TransitionCode state,<a name="line.1234"></a>
+<span class="sourceLineNo">1235</span> final RegionInfo parent, final RegionInfo hriA, final RegionInfo hriB) throws IOException {<a name="line.1235"></a>
+<span class="sourceLineNo">1236</span> checkMetaLoaded(parent);<a name="line.1236"></a>
+<span class="sourceLineNo">1237</span><a name="line.1237"></a>
+<span class="sourceLineNo">1238</span> if (state != TransitionCode.READY_TO_SPLIT) {<a name="line.1238"></a>
+<span class="sourceLineNo">1239</span> throw new UnexpectedStateException(<a name="line.1239"></a>
+<span class="sourceLineNo">1240</span> "unsupported split regionState=" + state + " for parent region " + parent<a name="line.1240"></a>
+<span class="sourceLineNo">1241</span> + " maybe an old RS (< 2.0) had the operation in progress");<a name="line.1241"></a>
+<span class="sourceLineNo">1242</span> }<a name="line.1242"></a>
+<span class="sourceLineNo">1243</span><a name="line.1243"></a>
+<span class="sourceLineNo">1244</span> // sanity check on the request<a name="line.1244"></a>
+<span class="sourceLineNo">1245</span> if (!Bytes.equals(hriA.getEndKey(), hriB.getStartKey())) {<a name="line.1245"></a>
+<span class="sourceLineNo">1246</span> throw new UnsupportedOperationException("unsupported split request with bad keys: parent="<a name="line.1246"></a>
+<span class="sourceLineNo">1247</span> + parent + " hriA=" + hriA + " hriB=" + hriB);<a name="line.1247"></a>
+<span class="sourceLineNo">1248</span> }<a name="line.1248"></a>
+<span class="sourceLineNo">1249</span><a name="line.1249"></a>
+<span class="sourceLineNo">1250</span> if (!master.isSplitOrMergeEnabled(MasterSwitchType.SPLIT)) {<a name="line.1250"></a>
+<span class="sourceLineNo">1251</span> LOG.warn("Split switch is off! skip split of " + parent);<a name="line.1251"></a>
+<span class="sourceLineNo">1252</span> throw new DoNotRetryIOException(<a name="line.1252"></a>
+<span class="sourceLineNo">1253</span> "Split region " + parent.getRegionNameAsString() + " failed due to split switch off");<a name="line.1253"></a>
+<span class="sourceLineNo">1254</span> }<a name="line.1254"></a>
+<span class="sourceLineNo">1255</span><a name="line.1255"></a>
+<span class="sourceLineNo">1256</span> // Submit the Split procedure<a name="line.1256"></a>
+<span class="sourceLineNo">1257</span> final byte[] splitKey = hriB.getStartKey();<a name="line.1257"></a>
+<span class="sourceLineNo">1258</span> if (LOG.isDebugEnabled()) {<a name="line.1258"></a>
+<span class="sourceLineNo">1259</span> LOG.debug("Split request from " + serverName + ", parent=" + parent + " splitKey="<a name="line.1259"></a>
+<span class="sourceLineNo">1260</span> + Bytes.toStringBinary(splitKey));<a name="line.1260"></a>
+<span class="sourceLineNo">1261</span> }<a name="line.1261"></a>
+<span class="sourceLineNo">1262</span> // Processing this report happens asynchronously from other activities which can mutate<a name="line.1262"></a>
+<span class="sourceLineNo">1263</span> // the region state. For example, a split procedure may already be running for this parent.<a name="line.1263"></a>
+<span class="sourceLineNo">1264</span> // A split procedure cannot succeed if the parent region is no longer open, so we can<a name="line.1264"></a>
+<span class="sourceLineNo">1265</span> // ignore it in that case.<a name="line.1265"></a>
+<span class="sourceLineNo">1266</span> // Note that submitting more than one split procedure for a given region is<a name="line.1266"></a>
+<span class="sourceLineNo">1267</span> // harmless -- the split is fenced in the procedure handling -- but it would be noisy in<a name="line.1267"></a>
+<span class="sourceLineNo">1268</span> // the logs. Only one procedure can succeed. The other procedure(s) would abort during<a name="line.1268"></a>
+<span class="sourceLineNo">1269</span> // initialization and report failure with WARN level logging.<a name="line.1269"></a>
+<span class="sourceLineNo">1270</span> RegionState parentState = regionStates.getRegionState(parent);<a name="line.1270"></a>
+<span class="sourceLineNo">1271</span> if (parentState != null && parentState.isOpened()) {<a name="line.1271"></a>
+<span class="sourceLineNo">1272</span> master.getMasterProcedureExecutor().submitProcedure(createSplitProcedure(parent, splitKey));<a name="line.1272"></a>
+<span class="sourceLineNo">1273</span> } else {<a name="line.1273"></a>
+<span class="sourceLineNo">1274</span> LOG.info("Ignoring split request from " + serverName + ", parent=" + parent<a name="line.1274"></a>
+<span class="sourceLineNo">1275</span> + " because parent is unknown or not open");<a name="line.1275"></a>
+<span class="sourceLineNo">1276</span> return;<a name="line.1276"></a>
+<span class="sourceLineNo">1277</span> }<a name="line.1277"></a>
+<span class="sourceLineNo">1278</span><a name="line.1278"></a>
+<span class="sourceLineNo">1279</span> // If the RS is < 2.0 throw an exception to abort the operation, we are handling the split<a name="line.1279"></a>
+<span class="sourceLineNo">1280</span> if (master.getServerManager().getVersionNumber(serverName) < 0x0200000) {<a name="line.1280"></a>
+<span class="sourceLineNo">1281</span> throw new UnsupportedOperationException(<a name="line.1281"></a>
+<span class="sourceLineNo">1282</span> String.format("Split handled by the master: " + "parent=%s hriA=%s hriB=%s",<a name="line.1282"></a>
+<span class="sourceLineNo">1283</span> parent.getShortNameToLog(), hriA, hriB));<a name="line.1283"></a>
+<span class="sourceLineNo">1284</span> }<a name="line.1284"></a>
+<span class="sourceLineNo">1285</span> }<a name="line.1285"></a>
+<span class="sourceLineNo">1286</span><a name="line.1286"></a>
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+<span class="sourceLineNo">1302</span><a name="line.1302"></a>
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-<span class="sourceLineNo">1368</span> /**<a name="line.1368"></a>
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-<span class="sourceLineNo">1384</span> /**<a name="line.1384"></a>
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+<span class="sourceLineNo">1347</span><a name="line.1347"></a>
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+<span class="sourceLineNo">1382</span> /**<a name="line.1382"></a>
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+<span class="sourceLineNo">1399</span> }<a name="line.1399"></a>
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+<span class="sourceLineNo">1401</span> regionNode.lock();<a name="line.1401"></a>
+<span class="sourceLineNo">1402</span> try {<a name="line.1402"></a>
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+<span class="sourceLineNo">1405</span> // This is possible as a region server has just closed a region but the region server<a name="line.1405"></a>
+<span class="sourceLineNo">1406</span> // report is generated before the closing, but arrive after the closing. Make sure there<a name="line.1406"></a>
+<span class="sourceLineNo">1407</span> // is some elapsed time so less false alarms.<a name="line.1407"></a>
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+<span class="sourceLineNo">1414</span> // So, we can get report that a region is CLOSED or SPLIT because a heartbeat<a name="line.1414"></a>
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+<span class="sourceLineNo">1416</span> // elapsed time so less false alarms.<a name="line.1416"></a>
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+<span class="sourceLineNo">1418</span> LOG.warn("Reporting {} state does not match {} (time since last update={}ms)",<a name="line.1418"></a>
+<span class="sourceLineNo">1419</span> serverName, regionNode, diff);<a name="line.1419"></a>
+<span class="sourceLineNo">1420</span> }<a name="line.1420"></a>
+<span class="sourceLineNo">1421</span> }<a name="line.1421"></a>
+<span class="sourceLineNo">1422</span> } finally {<a name="line.1422"></a>
+<span class="sourceLineNo">1423</span> regionNode.unlock();<a name="line.1423"></a>
+<span class="sourceLineNo">1424</span> }<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><a name="line.1427"></a>
+<span class="sourceLineNo">1428</span> // ============================================================================================<a name="line.1428"></a>
+<span class="sourceLineNo">1429</span> // RIT chore<a name="line.1429"></a>
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-<span class="sourceLineNo">1431</span> // RIT chore<a name="line.1431"></a>
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-<span class="sourceLineNo">1449</span> // update metrics<a name="line.1449"></a>
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-<span class="sourceLineNo">1504</span> LOG.info("Found {} OPEN regions on dead servers and {} OPEN regions on unknown servers",<a name="line.1504"></a>
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+<span class="sourceLineNo">1435</span><a name="line.1435"></a>
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+<span class="sourceLineNo">1445</span> }<a name="line.1445"></a>
+<span class="sourceLineNo">1446</span><a name="line.1446"></a>
+<span class="sourceLineNo">1447</span> // update metrics<a name="line.1447"></a>
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+<span class="sourceLineNo">1451</span><a name="line.1451"></a>
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+<span class="sourceLineNo">1457</span><a name="line.1457"></a>
+<span class="sourceLineNo">1458</span> @Override<a name="line.1458"></a>
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+<span class="sourceLineNo">1462</span> // To minimize inconsistencies we are not going to snapshot live servers in advance in case<a name="line.1462"></a>
+<span class="sourceLineNo">1463</span> // new servers are added; OTOH we don't want to add heavy sync for a consistent view since<a name="line.1463"></a>
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+<span class="sourceLineNo">1466</span> // we miss some recently-dead server, we'll just see it next time.<a name="line.1466"></a>
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+<span class="sourceLineNo">1473</span> // Do not need to acquire region state lock as this is only for showing metrics.<a name="line.1473"></a>
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+<span class="sourceLineNo">1502</span> LOG.info("Found {} OPEN regions on dead servers and {} OPEN regions on unknown servers",<a name="line.1502"></a>
+<span class="sourceLineNo">1503</span> deadRegions, unknownRegions);<a name="line.1503"></a>
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+<span class="sourceLineNo">1508</span> }<a name="line.1508"></a>
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+<span class="sourceLineNo">1523</span> private int totalRITs = 0;<a name="line.1523"></a>
+<span class="sourceLineNo">1524</span><a name="line.1524"></a>
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+<span class="sourceLineNo">1529</span><a name="line.1529"></a>
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+<span class="sourceLineNo">1533</span><a name="line.1533"></a>
+<span class="sourceLineNo">1534</span> public long getTimestamp() {<a name="line.1534"></a>
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+<span class="sourceLineNo">1537</span><a name="line.1537"></a>
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+<span class="sourceLineNo">1544</span> }<a name="line.1544"></a>
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+<span class="sourceLineNo">1548</span> return m != null ? m.size() : 0;<a name="line.1548"></a>
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+<span class="sourceLineNo">1550</span><a name="line.1550"></a>
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+<span class="sourceLineNo">1553</span> }<a name="line.1553"></a>
+<span class="sourceLineNo">1554</span><a name="line.1554"></a>
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+<span class="sourceLineNo">1557</span> return m != null && !m.isEmpty();<a name="line.1557"></a>
+<span class="sourceLineNo">1558</span> }<a name="line.1558"></a>
+<span class="sourceLineNo">1559</span><a name="line.1559"></a>
+<span class="sourceLineNo">1560</span> public Collection<RegionState> getRegionOverThreshold() {<a name="line.1560"></a>
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+<span class="sourceLineNo">1562</span> return m != null ? m.values() : Collections.emptySet();<a name="line.1562"></a>
+<span class="sourceLineNo">1563</span> }<a name="line.1563"></a>
+<span class="sourceLineNo">1564</span><a name="line.1564"></a>
+<span class="sourceLineNo">1565</span> public boolean isRegionOverThreshold(final RegionInfo regionInfo) {<a name="line.1565"></a>
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+<span class="sourceLineNo">1567</span> return m != null && m.containsKey(regionInfo.getEncodedName());<a name="line.1567"></a>
+<span class="sourceLineNo">1568</span> }<a name="line.1568"></a>
+<span class="sourceLineNo">1569</span><a name="line.1569"></a>
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+<span class="sourceLineNo">1581</span><a name="line.1581"></a>
+<span class="sourceLineNo">1582</span> protected void update(final AssignmentManager am) {<a name="line.1582"></a>
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+<span class="sourceLineNo">1584</span> this.statTimestamp = EnvironmentEdgeManager.currentTime();<a name="line.1584"></a>
+<span class="sourceLineNo">1585</span> update(regionStates.getRegionsStateInTransition(), statTimestamp);<a name="line.1585"></a>
+<span class="sourceLineNo">1586</span> update(regionStates.getRegionFailedOpen(), statTimestamp);<a name="line.1586"></a>
+<span class="sourceLineNo">1587</span><a name="line.1587"></a>
+<span class="sourceLineNo">1588</span> if (LOG.isDebugEnabled() && ritsOverThreshold != null && !ritsOverThreshold.isEmpty()) {<a name="line.1588"></a>
+<span class="sourceLineNo">1589</span> LOG.debug("RITs over threshold: {}",<a name="line.1589"></a>
+<span class="sourceLineNo">1590</span> ritsOverThreshold.entrySet().stream()<a name="line.1590"></a>
+<span class="sourceLineNo">1591</span> .map(e -> e.getKey() + ":" + e.getValue().getState().name())<a name="line.1591"></a>
+<span class="sourceLineNo">1592</span> .collect(Collectors.joining("\n")));<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>
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+<span class="sourceLineNo">1601</span> // Don't output bogus values to metrics if they accidentally make it here.<a name="line.1601"></a>
+<span class="sourceLineNo">1602</span> LOG.warn("The RIT {} has no start time", state.getRegion());<a name="line.1602"></a>
+<span class="sourceLineNo">1603</span> continue;<a name="line.1603"></a>
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+<span class="sourceLineNo">1617</span> }<a name="line.1617"></a>
+<span class="sourceLineNo">1618</span> }<a name="line.1618"></a>
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+<span class="sourceLineNo">1622</span> metrics.updateRITCount(ritStat.getTotalRITs());<a name="line.1622"></a>
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+<span class="sourceLineNo">1625</span><a name="line.1625"></a>
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+<span class="sourceLineNo">1628</span> metrics.updateUnknownServerOpenRegions(unknownRegions);<a name="line.1628"></a>
+<span class="sourceLineNo">1629</span> }<a name="line.1629"></a>
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+<span class="sourceLineNo">1631</span> private void handleRegionOverStuckWarningThreshold(final RegionInfo regionInfo) {<a name="line.1631"></a>
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+<span class="sourceLineNo">1633</span> // if (regionNode.isStuck()) {<a name="line.1633"></a>
+<span class="sourceLineNo">1634</span> LOG.warn("STUCK Region-In-Transition {}", regionNode);<a name="line.1634"></a>
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+<span class="sourceLineNo">1636</span><a name="line.1636"></a>
+<span class="sourceLineNo">1637</span> // ============================================================================================<a name="line.1637"></a>
+<span class="sourceLineNo">1638</span> // TODO: Master load/bootstrap<a name="line.1638"></a>
<span class="sourceLineNo">1639</span> // ============================================================================================<a name="line.1639"></a>
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-<span class="sourceLineNo">1644</span> LOG.debug("Joining cluster...");<a name="line.1644"></a>
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-<span class="sourceLineNo">1647</span> // hbase:meta is online now or will be. Inside loadMeta, we keep trying. Can't make progress<a name="line.1647"></a>
-<span class="sourceLineNo">1648</span> // w/o meta.<a name="line.1648"></a>
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-<span class="sourceLineNo">1652</span> LOG.info("Waiting for RegionServers to join; current count={}",<a name="line.1652"></a>
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+<span class="sourceLineNo">1712</span> ) {<a name="line.1712"></a>
+<span class="sourceLineNo">1713</span> // This is a row with nothing in it.<a name="line.1713"></a>
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+<span class="sourceLineNo">1720</span> // hbase1 to hbase2? Am I restoring a SNAPSHOT or otherwise adding a region to hbase:meta?<a name="line.1720"></a>
+<span class="sourceLineNo">1721</span> // In any of these cases, state is empty. For now, presume OFFLINE but there are probably<a name="line.1721"></a>
+<span class="sourceLineNo">1722</span> // cases where we need to probe more to be sure this correct; TODO informed by experience.<a name="line.1722"></a>
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+<span class="sourceLineNo">1731</span> regionNode.setLastHost(lastHost);<a name="line.1731"></a>
+<span class="sourceLineNo">1732</span> regionNode.setRegionLocation(regionLocation);<a name="line.1732"></a>
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+<span class="sourceLineNo">1734</span><a name="line.1734"></a>
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+<span class="sourceLineNo">1748</span> }<a name="line.1748"></a>
+<span class="sourceLineNo">1749</span> };<a name="line.1749"></a>
+<span class="sourceLineNo">1750</span><a name="line.1750"></a>
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+<span class="sourceLineNo">1758</span> throws IOException {<a name="line.1758"></a>
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+<span class="sourceLineNo">1760</span> ? regionInfo.getEncodedName()<a name="line.1760"></a>
+<span class="sourceLineNo">1761</span> : RegionInfoBuilder.newBuilder(regionInfo).setReplicaId(RegionInfo.DEFAULT_REPLICA_ID).build()<a name="line.1761"></a>
+<span class="sourceLineNo">1762</span> .getEncodedName();<a name="line.1762"></a>
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+<span class="sourceLineNo">1765</span><a name="line.1765"></a>
+<span class="sourceLineNo">1766</span> /**<a name="line.1766"></a>
+<span class="sourceLineNo">1767</span> * Attempt to load {@code regionEncodedName} from META, adding any results to the<a name="line.1767"></a>
+<span class="sourceLineNo">1768</span> * {@link #regionStateStore} Is NOT aware of replica regions.<a name="line.1768"></a>
+<span class="sourceLineNo">1769</span> * @param regionEncodedName encoded name for the region to be loaded from META.<a name="line.1769"></a>
+<span class="sourceLineNo">1770</span> * @throws IOException If some error occurs while querying META or parsing results.<a name="line.1770"></a>
+<span class="sourceLineNo">1771</span> */<a name="line.1771"></a>
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+<span class="sourceLineNo">1773</span> final RegionMetaLoadingVisitor visitor = new RegionMetaLoadingVisitor();<a name="line.1773"></a>
+<span class="sourceLineNo">1774</span> regionStateStore.visitMetaForRegion(regionEncodedName, visitor);<a name="line.1774"></a>
+<span class="sourceLineNo">1775</span> }<a name="line.1775"></a>
+<span class="sourceLineNo">1776</span><a name="line.1776"></a>
+<span class="sourceLineNo">1777</span> private void loadMeta() throws IOException {<a name="line.1777"></a>
+<span class="sourceLineNo">1778</span> // TODO: use a thread pool<a name="line.1778"></a>
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+<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> /**<a name="line.1782"></a>
+<span class="sourceLineNo">1783</span> * Used to check if the meta loading is done.<a name="line.1783"></a>
+<span class="sourceLineNo">1784</span> * <p/><a name="line.1784"></a>
+<span class="sourceLineNo">1785</span> * if not we throw PleaseHoldException since we are rebuilding the RegionStates<a name="line.1785"></a>
+<span class="sourceLineNo">1786</span> * @param hri region to check if it is already rebuild<a name="line.1786"></a>
+<span class="sourceLineNo">1787</span> * @throws PleaseHoldException if meta has not been loaded yet<a name="line.1787"></a>
+<span class="sourceLineNo">1788</span> */<a name="line.1788"></a>
+<span class="sourceLineNo">1789</span> private void checkMetaLoaded(RegionInfo hri) throws PleaseHoldException {<a name="line.1789"></a>
+<span class="sourceLineNo">1790</span> if (!isRunning()) {<a name="line.1790"></a>
+<span class="sourceLineNo">1791</span> throw new PleaseHoldException("AssignmentManager not running");<a name="line.1791"></a>
+<span class="sourceLineNo">1792</span> }<a name="line.1792"></a>
+<span class="sourceLineNo">1793</span> boolean meta = isMetaRegion(hri);<a name="line.1793"></a>
+<span class="sourceLineNo">1794</span> boolean metaLoaded = isMetaLoaded();<a name="line.1794"></a>
+<span class="sourceLineNo">1795</span> if (!meta && !metaLoaded) {<a name="line.1795"></a>
+<span class="sourceLineNo">1796</span> throw new PleaseHoldException(<a name="line.1796"></a>
+<span class="sourceLineNo">1797</span> "Master not fully online; hbase:meta=" + meta + ", metaLoaded=" + metaLoaded);<a name="line.1797"></a>
+<span class="sourceLineNo">1798</span> }<a name="line.1798"></a>
+<span class="sourceLineNo">1799</span> }<a name="line.1799"></a>
+<span class="sourceLineNo">1800</span><a name="line.1800"></a>
+<span class="sourceLineNo">1801</span> // ============================================================================================<a name="line.1801"></a>
+<span class="sourceLineNo">1802</span> // TODO: Metrics<a name="line.1802"></a>
<span class="sourceLineNo">1803</span> // ============================================================================================<a name="line.1803"></a>
-<span class="sourceLineNo">1804</span> // TODO: Metrics<a name="line.1804"></a>
-<span class="sourceLineNo">1805</span> // ============================================================================================<a name="line.1805"></a>
-<span class="sourceLineNo">1806</span> public int getNumRegionsOpened() {<a name="line.1806"></a>
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-<span class="sourceLineNo">1808</span> return 0;<a name="line.1808"></a>
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-<span class="sourceLineNo">1811</span> /**<a name="line.1811"></a>
-<span class="sourceLineNo">1812</span> * Usually run by the Master in reaction to server crash during normal processing. Can also be<a name="line.1812"></a>
-<span class="sourceLineNo">1813</span> * invoked via external RPC to effect repair; in the latter case, the 'force' flag is set so we<a name="line.1813"></a>
-<span class="sourceLineNo">1814</span> * push through the SCP though context may indicate already-running-SCP (An old SCP may have<a name="line.1814"></a>
-<span class="sourceLineNo">1815</span> * exited abnormally, or damaged cluster may still have references in hbase:meta to 'Unknown<a name="line.1815"></a>
-<span class="sourceLineNo">1816</span> * Servers' -- servers that are not online or in dead servers list, etc.)<a name="line.1816"></a>
-<span class="sourceLineNo">1817</span> * @param force Set if the request came in externally over RPC (via hbck2). Force means run the<a name="line.1817"></a>
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-<span class="sourceLineNo">1819</span> * @return pid of scheduled SCP or {@link Procedure#NO_PROC_ID} if none scheduled.<a name="line.1819"></a>
-<span class="sourceLineNo">1820</span> */<a name="line.1820"></a>
-<span class="sourceLineNo">1821</span> public long submitServerCrash(ServerName serverName, boolean shouldSplitWal, boolean force) {<a name="line.1821"></a>
-<span class="sourceLineNo">1822</span> // May be an 'Unknown Server' so handle case where serverNode is null.<a name="line.1822"></a>
-<span class="sourceLineNo">1823</span> ServerStateNode serverNode = regionStates.getServerNode(serverName);<a name="line.1823"></a>
-<span class="sourceLineNo">1824</span> // Remove the in-memory rsReports result<a name="line.1824"></a>
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-<span class="sourceLineNo">1829</span> // We hold the write lock here for fencing on reportRegionStateTransition. Once we set the<a name="line.1829"></a>
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-<span class="sourceLineNo">1831</span> // this server. This is used to simplify the implementation for TRSP and SCP, where we can make<a name="line.1831"></a>
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-<span class="sourceLineNo">1834</span> serverNode.writeLock().lock();<a name="line.1834"></a>
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-<span class="sourceLineNo">1836</span> boolean carryingMeta;<a name="line.1836"></a>
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-<span class="sourceLineNo">1838</span> try {<a name="line.1838"></a>
-<span class="sourceLineNo">1839</span> ProcedureExecutor<MasterProcedureEnv> procExec = this.master.getMasterProcedureExecutor();<a name="line.1839"></a>
-<span class="sourceLineNo">1840</span> carryingMeta = isCarryingMeta(serverName);<a name="line.1840"></a>
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-<span class="sourceLineNo">1842</span> LOG.info("Skip adding ServerCrashProcedure for {} (meta={}) -- running?", serverNode,<a name="line.1842"></a>
-<span class="sourceLineNo">1843</span> carryingMeta);<a name="line.1843"></a>
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-<span class="sourceLineNo">1849</span> // serverName just-in-case. An SCP that is scheduled when the server is<a name="line.1849"></a>
-<span class="sourceLineNo">1850</span> // 'Unknown' probably originated externally with HBCK2 fix-it tool.<a name="line.1850"></a>
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-<span class="sourceLineNo">1862</span> new ServerCrashProcedure(mpe, serverName, shouldSplitWal, carryingMeta));<a name="line.1862"></a>
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-<span class="sourceLineNo">1865</span> serverName, carryingMeta,<a name="line.1865"></a>
-<span class="sourceLineNo">1866</span> serverNode == null ? "" : " " + serverNode.toString() + ", oldState=" + oldState);<a name="line.1866"></a>
-<span class="sourceLineNo">1867</span> }<a name="line.1867"></a>
-<span class="sourceLineNo">1868</span> } finally {<a name="line.1868"></a>
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-<span class="sourceLineNo">1882</span> }<a name="line.1882"></a>
-<span class="sourceLineNo">1883</span><a name="line.1883"></a>
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-<span class="sourceLineNo">1888</span> public Map<ServerName, List<RegionInfo>><a name="line.1888"></a>
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-<span class="sourceLineNo">1891</span> }<a name="line.1891"></a>
-<span class="sourceLineNo">1892</span><a name="line.1892"></a>
+<span class="sourceLineNo">1804</span> public int getNumRegionsOpened() {<a name="line.1804"></a>
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+<span class="sourceLineNo">1807</span> }<a name="line.1807"></a>
+<span class="sourceLineNo">1808</span><a name="line.1808"></a>
+<span class="sourceLineNo">1809</span> /**<a name="line.1809"></a>
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+<span class="sourceLineNo">1813</span> * exited abnormally, or damaged cluster may still have references in hbase:meta to 'Unknown<a name="line.1813"></a>
+<span class="sourceLineNo">1814</span> * Servers' -- servers that are not online or in dead servers list, etc.)<a name="line.1814"></a>
+<span class="sourceLineNo">1815</span> * @param force Set if the request came in externally over RPC (via hbck2). Force means run the<a name="line.1815"></a>
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+<span class="sourceLineNo">1818</span> */<a name="line.1818"></a>
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+<span class="sourceLineNo">1820</span> // May be an 'Unknown Server' so handle case where serverNode is null.<a name="line.1820"></a>
+<span class="sourceLineNo">1821</span> ServerStateNode serverNode = regionStates.getServerNode(serverName);<a name="line.1821"></a>
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+<span class="sourceLineNo">1826</span><a name="line.1826"></a>
+<span class="sourceLineNo">1827</span> // We hold the write lock here for fencing on reportRegionStateTransition. Once we set the<a name="line.1827"></a>
+<span class="sourceLineNo">1828</span> // server state to CRASHED, we will no longer accept the reportRegionStateTransition call from<a name="line.1828"></a>
+<span class="sourceLineNo">1829</span> // this server. This is used to simplify the implementation for TRSP and SCP, where we can make<a name="line.1829"></a>
+<span class="sourceLineNo">1830</span> // sure that, the region list fetched by SCP will not be changed any more.<a name="line.1830"></a>
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+<span class="sourceLineNo">1833</span> }<a name="line.1833"></a>
+<span class="sourceLineNo">1834</span> boolean carryingMeta;<a name="line.1834"></a>
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<span class="sourceLineNo">1893</span> // ============================================================================================<a name="line.1893"></a>
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+<span class="sourceLineNo">2432</span> */<a name="line.2432"></a>
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+<span class="sourceLineNo">2436</span> // RegionServerInfo that includes Version.<a name="line.2436"></a>
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+<span class="sourceLineNo">2456</span> MasterServices getMaster() {<a name="line.2456"></a>
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+<span class="sourceLineNo">2460</span> /** Returns a snapshot of rsReports */<a name="line.2460"></a>
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+<span class="sourceLineNo">2478</span> int ritCount = 0;<a name="line.2478"></a>
+<span class="sourceLineNo">2479</span> int splitRegionCount = 0;<a name="line.2479"></a>
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+<span class="sourceLineNo">2494</span> }<a name="line.2494"></a>
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+<span class="sourceLineNo">2496</span> .setClosedRegions(closedRegionCount).setSplitRegions(splitRegionCount)<a name="line.2496"></a>
+<span class="sourceLineNo">2497</span> .setRegionsInTransition(ritCount).setTotalRegions(totalRegionCount).build();<a name="line.2497"></a>
+<span class="sourceLineNo">2498</span> }<a name="line.2498"></a>
+<span class="sourceLineNo">2499</span><a name="line.2499"></a>
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionStat.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionStat.html
index ea172726b4e..09f2091a100 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionStat.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.RegionInTransitionStat.html
@@ -1102,1412 +1102,1410 @@
<span class="sourceLineNo">1094</span> regionStateStore.deleteRegions(regions);<a name="line.1094"></a>
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-<span class="sourceLineNo">1099</span> regionStates.deleteRegion(regionInfo);<a name="line.1099"></a>
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-<span class="sourceLineNo">1101</span> }<a name="line.1101"></a>
-<span class="sourceLineNo">1102</span><a name="line.1102"></a>
+<span class="sourceLineNo">1097</span> regionStates.deleteRegion(regionInfo);<a name="line.1097"></a>
+<span class="sourceLineNo">1098</span> }<a name="line.1098"></a>
+<span class="sourceLineNo">1099</span> }<a name="line.1099"></a>
+<span class="sourceLineNo">1100</span><a name="line.1100"></a>
+<span class="sourceLineNo">1101</span> // ============================================================================================<a name="line.1101"></a>
+<span class="sourceLineNo">1102</span> // RS Region Transition Report helpers<a name="line.1102"></a>
<span class="sourceLineNo">1103</span> // ============================================================================================<a name="line.1103"></a>
-<span class="sourceLineNo">1104</span> // RS Region Transition Report helpers<a name="line.1104"></a>
-<span class="sourceLineNo">1105</span> // ============================================================================================<a name="line.1105"></a>
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+<span class="sourceLineNo">1194</span> regionNode, state);<a name="line.1194"></a>
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+<span class="sourceLineNo">1202</span> // rit=OPEN, location=ve0538.halxg.cloudera.com,16020,1533493000958,<a name="line.1202"></a>
+<span class="sourceLineNo">1203</span> // table=IntegrationTestBigLinkedList, region=65ab289e2fc1530df65f6c3d7cde7aa5 transition<a name="line.1203"></a>
+<span class="sourceLineNo">1204</span> // to CLOSED<a name="line.1204"></a>
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+<span class="sourceLineNo">1243</span><a name="line.1243"></a>
+<span class="sourceLineNo">1244</span> // sanity check on the request<a name="line.1244"></a>
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+<span class="sourceLineNo">1258</span> if (LOG.isDebugEnabled()) {<a name="line.1258"></a>
+<span class="sourceLineNo">1259</span> LOG.debug("Split request from " + serverName + ", parent=" + parent + " splitKey="<a name="line.1259"></a>
+<span class="sourceLineNo">1260</span> + Bytes.toStringBinary(splitKey));<a name="line.1260"></a>
+<span class="sourceLineNo">1261</span> }<a name="line.1261"></a>
+<span class="sourceLineNo">1262</span> // Processing this report happens asynchronously from other activities which can mutate<a name="line.1262"></a>
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+<span class="sourceLineNo">1266</span> // Note that submitting more than one split procedure for a given region is<a name="line.1266"></a>
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+<span class="sourceLineNo">1269</span> // initialization and report failure with WARN level logging.<a name="line.1269"></a>
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+<span class="sourceLineNo">1275</span> + " because parent is unknown or not open");<a name="line.1275"></a>
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+<span class="sourceLineNo">1278</span><a name="line.1278"></a>
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+<span class="sourceLineNo">1285</span> }<a name="line.1285"></a>
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+<span class="sourceLineNo">1298</span> LOG.warn("Merge switch is off! skip merge of regionA=" + hriA + " regionB=" + hriB);<a name="line.1298"></a>
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+<span class="sourceLineNo">1300</span> "Merge of regionA=" + hriA + " regionB=" + hriB + " failed because merge switch is off");<a name="line.1300"></a>
+<span class="sourceLineNo">1301</span> }<a name="line.1301"></a>
+<span class="sourceLineNo">1302</span><a name="line.1302"></a>
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+<span class="sourceLineNo">1304</span> if (LOG.isDebugEnabled()) {<a name="line.1304"></a>
+<span class="sourceLineNo">1305</span> LOG.debug("Handling merge request from RS=" + merged + ", merged=" + merged);<a name="line.1305"></a>
+<span class="sourceLineNo">1306</span> }<a name="line.1306"></a>
+<span class="sourceLineNo">1307</span> master.getMasterProcedureExecutor().submitProcedure(createMergeProcedure(hriA, hriB));<a name="line.1307"></a>
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+<span class="sourceLineNo">1309</span> // If the RS is < 2.0 throw an exception to abort the operation, we are handling the merge<a name="line.1309"></a>
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+<span class="sourceLineNo">1317</span> // ============================================================================================<a name="line.1317"></a>
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<span class="sourceLineNo">1319</span> // ============================================================================================<a name="line.1319"></a>
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-<span class="sourceLineNo">1328</span> * actually there is no problem.<a name="line.1328"></a>
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-<span class="sourceLineNo">1338</span> regionNames.size(), isMetaLoaded(),<a name="line.1338"></a>
-<span class="sourceLineNo">1339</span> regionNames.stream().map(Bytes::toStringBinary).collect(Collectors.toList()));<a name="line.1339"></a>
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-<span class="sourceLineNo">1345</span> LOG.warn("Got a report from a server result in state " + serverNode.getState());<a name="line.1345"></a>
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-<span class="sourceLineNo">1372</span> * accounting.<a name="line.1372"></a>
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-<span class="sourceLineNo">1411</span> LOG.warn("Reporting {} server does not match {} (time since last "<a name="line.1411"></a>
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+<span class="sourceLineNo">1322</span> * contains the "online regions". This method will check the the online regions against the<a name="line.1322"></a>
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+<span class="sourceLineNo">1325</span> * regionServerReport method, so there could be race and introduce inconsistency here, but<a name="line.1325"></a>
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+<span class="sourceLineNo">1327</span> * <p/><a name="line.1327"></a>
+<span class="sourceLineNo">1328</span> * Please see HBASE-21421 and HBASE-21463 for more details.<a name="line.1328"></a>
+<span class="sourceLineNo">1329</span> */<a name="line.1329"></a>
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+<span class="sourceLineNo">1335</span> LOG.trace("ReportOnlineRegions {} regionCount={}, metaLoaded={} {}", serverName,<a name="line.1335"></a>
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+<span class="sourceLineNo">1337</span> regionNames.stream().map(Bytes::toStringBinary).collect(Collectors.toList()));<a name="line.1337"></a>
+<span class="sourceLineNo">1338</span> }<a name="line.1338"></a>
+<span class="sourceLineNo">1339</span><a name="line.1339"></a>
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+<span class="sourceLineNo">1343</span> LOG.warn("Got a report from a server result in state " + serverNode.getState());<a name="line.1343"></a>
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+<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> // Track the regionserver reported online regions in memory.<a name="line.1348"></a>
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+<span class="sourceLineNo">1350</span> rsReports.put(serverName, regionNames);<a name="line.1350"></a>
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+<span class="sourceLineNo">1352</span><a name="line.1352"></a>
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+<span class="sourceLineNo">1354</span> // nothing to do if we don't have regions<a name="line.1354"></a>
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+<span class="sourceLineNo">1357</span> }<a name="line.1357"></a>
+<span class="sourceLineNo">1358</span> if (!isMetaLoaded()) {<a name="line.1358"></a>
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+<span class="sourceLineNo">1361</span> }<a name="line.1361"></a>
+<span class="sourceLineNo">1362</span> // The Heartbeat tells us of what regions are on the region serve, check the state.<a name="line.1362"></a>
+<span class="sourceLineNo">1363</span> checkOnlineRegionsReport(serverNode, regionNames);<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> /**<a name="line.1366"></a>
+<span class="sourceLineNo">1367</span> * Close <code>regionName</code> on <code>sn</code> silently and immediately without using a<a name="line.1367"></a>
+<span class="sourceLineNo">1368</span> * Procedure or going via hbase:meta. For case where a RegionServer's hosting of a Region is not<a name="line.1368"></a>
+<span class="sourceLineNo">1369</span> * aligned w/ the Master's accounting of Region state. This is for cleaning up an error in<a name="line.1369"></a>
+<span class="sourceLineNo">1370</span> * accounting.<a name="line.1370"></a>
+<span class="sourceLineNo">1371</span> */<a name="line.1371"></a>
+<span class="sourceLineNo">1372</span> private void closeRegionSilently(ServerName sn, byte[] regionName) {<a name="line.1372"></a>
+<span class="sourceLineNo">1373</span> try {<a name="line.1373"></a>
+<span class="sourceLineNo">1374</span> RegionInfo ri = CatalogFamilyFormat.parseRegionInfoFromRegionName(regionName);<a name="line.1374"></a>
+<span class="sourceLineNo">1375</span> // Pass -1 for timeout. Means do not wait.<a name="line.1375"></a>
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+<span class="sourceLineNo">1377</span> } catch (Exception e) {<a name="line.1377"></a>
+<span class="sourceLineNo">1378</span> LOG.error("Failed trying to close {} on {}", Bytes.toStringBinary(regionName), sn, e);<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><a name="line.1381"></a>
+<span class="sourceLineNo">1382</span> /**<a name="line.1382"></a>
+<span class="sourceLineNo">1383</span> * Check that what the RegionServer reports aligns with the Master's image. If disagreement, we<a name="line.1383"></a>
+<span class="sourceLineNo">1384</span> * will tell the RegionServer to expediently close a Region we do not think it should have.<a name="line.1384"></a>
+<span class="sourceLineNo">1385</span> */<a name="line.1385"></a>
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+<span class="sourceLineNo">1388</span> for (byte[] regionName : regionNames) {<a name="line.1388"></a>
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+<span class="sourceLineNo">1390</span> return;<a name="line.1390"></a>
+<span class="sourceLineNo">1391</span> }<a name="line.1391"></a>
+<span class="sourceLineNo">1392</span> RegionStateNode regionNode = regionStates.getRegionStateNodeFromName(regionName);<a name="line.1392"></a>
+<span class="sourceLineNo">1393</span> if (regionNode == null) {<a name="line.1393"></a>
+<span class="sourceLineNo">1394</span> String regionNameAsStr = Bytes.toStringBinary(regionName);<a name="line.1394"></a>
+<span class="sourceLineNo">1395</span> LOG.warn("No RegionStateNode for {} but reported as up on {}; closing...", regionNameAsStr,<a name="line.1395"></a>
+<span class="sourceLineNo">1396</span> serverName);<a name="line.1396"></a>
+<span class="sourceLineNo">1397</span> closeRegionSilently(serverNode.getServerName(), regionName);<a name="line.1397"></a>
+<span class="sourceLineNo">1398</span> continue;<a name="line.1398"></a>
+<span class="sourceLineNo">1399</span> }<a name="line.1399"></a>
+<span class="sourceLineNo">1400</span> final long lag = 1000;<a name="line.1400"></a>
+<span class="sourceLineNo">1401</span> regionNode.lock();<a name="line.1401"></a>
+<span class="sourceLineNo">1402</span> try {<a name="line.1402"></a>
+<span class="sourceLineNo">1403</span> long diff = EnvironmentEdgeManager.currentTime() - regionNode.getLastUpdate();<a name="line.1403"></a>
+<span class="sourceLineNo">1404</span> if (regionNode.isInState(State.OPENING, State.OPEN)) {<a name="line.1404"></a>
+<span class="sourceLineNo">1405</span> // This is possible as a region server has just closed a region but the region server<a name="line.1405"></a>
+<span class="sourceLineNo">1406</span> // report is generated before the closing, but arrive after the closing. Make sure there<a name="line.1406"></a>
+<span class="sourceLineNo">1407</span> // is some elapsed time so less false alarms.<a name="line.1407"></a>
+<span class="sourceLineNo">1408</span> if (!regionNode.getRegionLocation().equals(serverName) && diff > lag) {<a name="line.1408"></a>
+<span class="sourceLineNo">1409</span> LOG.warn("Reporting {} server does not match {} (time since last "<a name="line.1409"></a>
+<span class="sourceLineNo">1410</span> + "update={}ms); closing...", serverName, regionNode, diff);<a name="line.1410"></a>
+<span class="sourceLineNo">1411</span> closeRegionSilently(serverNode.getServerName(), regionName);<a name="line.1411"></a>
+<span class="sourceLineNo">1412</span> }<a name="line.1412"></a>
+<span class="sourceLineNo">1413</span> } else if (!regionNode.isInState(State.CLOSING, State.SPLITTING)) {<a name="line.1413"></a>
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+<span class="sourceLineNo">1416</span> // elapsed time so less false alarms.<a name="line.1416"></a>
+<span class="sourceLineNo">1417</span> if (diff > lag) {<a name="line.1417"></a>
+<span class="sourceLineNo">1418</span> LOG.warn("Reporting {} state does not match {} (time since last update={}ms)",<a name="line.1418"></a>
+<span class="sourceLineNo">1419</span> serverName, regionNode, diff);<a name="line.1419"></a>
+<span class="sourceLineNo">1420</span> }<a name="line.1420"></a>
+<span class="sourceLineNo">1421</span> }<a name="line.1421"></a>
+<span class="sourceLineNo">1422</span> } finally {<a name="line.1422"></a>
+<span class="sourceLineNo">1423</span> regionNode.unlock();<a name="line.1423"></a>
+<span class="sourceLineNo">1424</span> }<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><a name="line.1427"></a>
+<span class="sourceLineNo">1428</span> // ============================================================================================<a name="line.1428"></a>
+<span class="sourceLineNo">1429</span> // RIT chore<a name="line.1429"></a>
<span class="sourceLineNo">1430</span> // ============================================================================================<a name="line.1430"></a>
-<span class="sourceLineNo">1431</span> // RIT chore<a name="line.1431"></a>
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-<span class="sourceLineNo">1444</span> for (RegionState hri : ritStat.getRegionOverThreshold()) {<a name="line.1444"></a>
-<span class="sourceLineNo">1445</span> am.handleRegionOverStuckWarningThreshold(hri.getRegion());<a name="line.1445"></a>
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-<span class="sourceLineNo">1447</span> }<a name="line.1447"></a>
-<span class="sourceLineNo">1448</span><a name="line.1448"></a>
-<span class="sourceLineNo">1449</span> // update metrics<a name="line.1449"></a>
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-<span class="sourceLineNo">1459</span><a name="line.1459"></a>
-<span class="sourceLineNo">1460</span> @Override<a name="line.1460"></a>
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-<span class="sourceLineNo">1465</span> // new servers are added; OTOH we don't want to add heavy sync for a consistent view since<a name="line.1465"></a>
-<span class="sourceLineNo">1466</span> // this is for metrics. Instead, we're going to check each regions as we go; to avoid making<a name="line.1466"></a>
-<span class="sourceLineNo">1467</span> // too many checks, we maintain a local lists of server, limiting us to false negatives. If<a name="line.1467"></a>
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+<span class="sourceLineNo">1446</span><a name="line.1446"></a>
+<span class="sourceLineNo">1447</span> // update metrics<a name="line.1447"></a>
+<span class="sourceLineNo">1448</span> am.updateRegionsInTransitionMetrics(ritStat);<a name="line.1448"></a>
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+<span class="sourceLineNo">1451</span><a name="line.1451"></a>
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+<span class="sourceLineNo">1457</span><a name="line.1457"></a>
+<span class="sourceLineNo">1458</span> @Override<a name="line.1458"></a>
+<span class="sourceLineNo">1459</span> protected void periodicExecute(final MasterProcedureEnv env) {<a name="line.1459"></a>
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+<span class="sourceLineNo">1462</span> // To minimize inconsistencies we are not going to snapshot live servers in advance in case<a name="line.1462"></a>
+<span class="sourceLineNo">1463</span> // new servers are added; OTOH we don't want to add heavy sync for a consistent view since<a name="line.1463"></a>
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+<span class="sourceLineNo">1466</span> // we miss some recently-dead server, we'll just see it next time.<a name="line.1466"></a>
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+<span class="sourceLineNo">1473</span> // Do not need to acquire region state lock as this is only for showing metrics.<a name="line.1473"></a>
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<span class="sourceLineNo">1639</span> // ============================================================================================<a name="line.1639"></a>
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+<span class="sourceLineNo">1642</span> LOG.debug("Joining cluster...");<a name="line.1642"></a>
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+<span class="sourceLineNo">1646</span> // w/o meta.<a name="line.1646"></a>
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+<span class="sourceLineNo">1648</span><a name="line.1648"></a>
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+<span class="sourceLineNo">1655</span><a name="line.1655"></a>
+<span class="sourceLineNo">1656</span> // Start the chores<a name="line.1656"></a>
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+<span class="sourceLineNo">1658</span> master.getMasterProcedureExecutor().addChore(this.deadMetricChore);<a name="line.1658"></a>
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+<span class="sourceLineNo">1663</span><a name="line.1663"></a>
+<span class="sourceLineNo">1664</span> /**<a name="line.1664"></a>
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+<span class="sourceLineNo">1671</span> * method any more. Need to revisit later.<a name="line.1671"></a>
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+<span class="sourceLineNo">1674</span> // Needs to be done after the table state manager has been started.<a name="line.1674"></a>
+<span class="sourceLineNo">1675</span> public void processOfflineRegions() {<a name="line.1675"></a>
+<span class="sourceLineNo">1676</span> TransitRegionStateProcedure[] procs =<a name="line.1676"></a>
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+<span class="sourceLineNo">1687</span> } finally {<a name="line.1687"></a>
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+<span class="sourceLineNo">1694</span> }<a name="line.1694"></a>
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+<span class="sourceLineNo">1702</span> * AssignmentManager.regionStates.<a name="line.1702"></a>
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+<span class="sourceLineNo">1704</span> private class RegionMetaLoadingVisitor implements RegionStateStore.RegionStateVisitor {<a name="line.1704"></a>
+<span class="sourceLineNo">1705</span><a name="line.1705"></a>
+<span class="sourceLineNo">1706</span> @Override<a name="line.1706"></a>
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+<span class="sourceLineNo">1708</span> final ServerName regionLocation, final ServerName lastHost, final long openSeqNum) {<a name="line.1708"></a>
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+<span class="sourceLineNo">1712</span> ) {<a name="line.1712"></a>
+<span class="sourceLineNo">1713</span> // This is a row with nothing in it.<a name="line.1713"></a>
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+<span class="sourceLineNo">1720</span> // hbase1 to hbase2? Am I restoring a SNAPSHOT or otherwise adding a region to hbase:meta?<a name="line.1720"></a>
+<span class="sourceLineNo">1721</span> // In any of these cases, state is empty. For now, presume OFFLINE but there are probably<a name="line.1721"></a>
+<span class="sourceLineNo">1722</span> // cases where we need to probe more to be sure this correct; TODO informed by experience.<a name="line.1722"></a>
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+<span class="sourceLineNo">1729</span> // region related operations, but here we do not load the informations for meta region.<a name="line.1729"></a>
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+<span class="sourceLineNo">1731</span> regionNode.setLastHost(lastHost);<a name="line.1731"></a>
+<span class="sourceLineNo">1732</span> regionNode.setRegionLocation(regionLocation);<a name="line.1732"></a>
+<span class="sourceLineNo">1733</span> regionNode.setOpenSeqNum(openSeqNum);<a name="line.1733"></a>
+<span class="sourceLineNo">1734</span><a name="line.1734"></a>
+<span class="sourceLineNo">1735</span> // Note: keep consistent with other methods, see region(Opening|Opened|Closing)<a name="line.1735"></a>
+<span class="sourceLineNo">1736</span> // RIT/ServerCrash handling should take care of the transiting regions.<a name="line.1736"></a>
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+<span class="sourceLineNo">1739</span> ) {<a name="line.1739"></a>
+<span class="sourceLineNo">1740</span> assert regionLocation != null : "found null region location for " + regionNode;<a name="line.1740"></a>
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+<span class="sourceLineNo">1748</span> }<a name="line.1748"></a>
+<span class="sourceLineNo">1749</span> };<a name="line.1749"></a>
+<span class="sourceLineNo">1750</span><a name="line.1750"></a>
+<span class="sourceLineNo">1751</span> /**<a name="line.1751"></a>
+<span class="sourceLineNo">1752</span> * Attempt to load {@code regionInfo} from META, adding any results to the<a name="line.1752"></a>
+<span class="sourceLineNo">1753</span> * {@link #regionStateStore} Is NOT aware of replica regions.<a name="line.1753"></a>
+<span class="sourceLineNo">1754</span> * @param regionInfo the region to be loaded from META.<a name="line.1754"></a>
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+<span class="sourceLineNo">1756</span> */<a name="line.1756"></a>
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+<span class="sourceLineNo">1758</span> throws IOException {<a name="line.1758"></a>
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+<span class="sourceLineNo">1760</span> ? regionInfo.getEncodedName()<a name="line.1760"></a>
+<span class="sourceLineNo">1761</span> : RegionInfoBuilder.newBuilder(regionInfo).setReplicaId(RegionInfo.DEFAULT_REPLICA_ID).build()<a name="line.1761"></a>
+<span class="sourceLineNo">1762</span> .getEncodedName();<a name="line.1762"></a>
+<span class="sourceLineNo">1763</span> populateRegionStatesFromMeta(regionEncodedName);<a name="line.1763"></a>
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+<span class="sourceLineNo">1765</span><a name="line.1765"></a>
+<span class="sourceLineNo">1766</span> /**<a name="line.1766"></a>
+<span class="sourceLineNo">1767</span> * Attempt to load {@code regionEncodedName} from META, adding any results to the<a name="line.1767"></a>
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+<span class="sourceLineNo">1771</span> */<a name="line.1771"></a>
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+<span class="sourceLineNo">1774</span> regionStateStore.visitMetaForRegion(regionEncodedName, visitor);<a name="line.1774"></a>
+<span class="sourceLineNo">1775</span> }<a name="line.1775"></a>
+<span class="sourceLineNo">1776</span><a name="line.1776"></a>
+<span class="sourceLineNo">1777</span> private void loadMeta() throws IOException {<a name="line.1777"></a>
+<span class="sourceLineNo">1778</span> // TODO: use a thread pool<a name="line.1778"></a>
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+<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> /**<a name="line.1782"></a>
+<span class="sourceLineNo">1783</span> * Used to check if the meta loading is done.<a name="line.1783"></a>
+<span class="sourceLineNo">1784</span> * <p/><a name="line.1784"></a>
+<span class="sourceLineNo">1785</span> * if not we throw PleaseHoldException since we are rebuilding the RegionStates<a name="line.1785"></a>
+<span class="sourceLineNo">1786</span> * @param hri region to check if it is already rebuild<a name="line.1786"></a>
+<span class="sourceLineNo">1787</span> * @throws PleaseHoldException if meta has not been loaded yet<a name="line.1787"></a>
+<span class="sourceLineNo">1788</span> */<a name="line.1788"></a>
+<span class="sourceLineNo">1789</span> private void checkMetaLoaded(RegionInfo hri) throws PleaseHoldException {<a name="line.1789"></a>
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+<span class="sourceLineNo">1791</span> throw new PleaseHoldException("AssignmentManager not running");<a name="line.1791"></a>
+<span class="sourceLineNo">1792</span> }<a name="line.1792"></a>
+<span class="sourceLineNo">1793</span> boolean meta = isMetaRegion(hri);<a name="line.1793"></a>
+<span class="sourceLineNo">1794</span> boolean metaLoaded = isMetaLoaded();<a name="line.1794"></a>
+<span class="sourceLineNo">1795</span> if (!meta && !metaLoaded) {<a name="line.1795"></a>
+<span class="sourceLineNo">1796</span> throw new PleaseHoldException(<a name="line.1796"></a>
+<span class="sourceLineNo">1797</span> "Master not fully online; hbase:meta=" + meta + ", metaLoaded=" + metaLoaded);<a name="line.1797"></a>
+<span class="sourceLineNo">1798</span> }<a name="line.1798"></a>
+<span class="sourceLineNo">1799</span> }<a name="line.1799"></a>
+<span class="sourceLineNo">1800</span><a name="line.1800"></a>
+<span class="sourceLineNo">1801</span> // ============================================================================================<a name="line.1801"></a>
+<span class="sourceLineNo">1802</span> // TODO: Metrics<a name="line.1802"></a>
<span class="sourceLineNo">1803</span> // ============================================================================================<a name="line.1803"></a>
-<span class="sourceLineNo">1804</span> // TODO: Metrics<a name="line.1804"></a>
-<span class="sourceLineNo">1805</span> // ============================================================================================<a name="line.1805"></a>
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-<span class="sourceLineNo">1810</span><a name="line.1810"></a>
-<span class="sourceLineNo">1811</span> /**<a name="line.1811"></a>
-<span class="sourceLineNo">1812</span> * Usually run by the Master in reaction to server crash during normal processing. Can also be<a name="line.1812"></a>
-<span class="sourceLineNo">1813</span> * invoked via external RPC to effect repair; in the latter case, the 'force' flag is set so we<a name="line.1813"></a>
-<span class="sourceLineNo">1814</span> * push through the SCP though context may indicate already-running-SCP (An old SCP may have<a name="line.1814"></a>
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<span class="sourceLineNo">1893</span> // ============================================================================================<a name="line.1893"></a>
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<span class="sourceLineNo">1915</span> // ============================================================================================<a name="line.1915"></a>
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+<span class="sourceLineNo">1986</span> // revert<a name="line.1986"></a>
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+<span class="sourceLineNo">2247</span> }<a name="line.2247"></a>
+<span class="sourceLineNo">2248</span> assignQueueFullCond.await(assignDispatchWaitMillis, TimeUnit.MILLISECONDS);<a name="line.2248"></a>
+<span class="sourceLineNo">2249</span> regions = new HashMap<RegionInfo, RegionStateNode>(pendingAssignQueue.size());<a name="line.2249"></a>
+<span class="sourceLineNo">2250</span> for (RegionStateNode regionNode : pendingAssignQueue) {<a name="line.2250"></a>
+<span class="sourceLineNo">2251</span> regions.put(regionNode.getRegionInfo(), regionNode);<a name="line.2251"></a>
+<span class="sourceLineNo">2252</span> }<a name="line.2252"></a>
+<span class="sourceLineNo">2253</span> pendingAssignQueue.clear();<a name="line.2253"></a>
+<span class="sourceLineNo">2254</span> } catch (InterruptedException e) {<a name="line.2254"></a>
+<span class="sourceLineNo">2255</span> LOG.warn("got interrupted ", e);<a name="line.2255"></a>
+<span class="sourceLineNo">2256</span> Thread.currentThread().interrupt();<a name="line.2256"></a>
+<span class="sourceLineNo">2257</span> } finally {<a name="line.2257"></a>
+<span class="sourceLineNo">2258</span> assignQueueLock.unlock();<a name="line.2258"></a>
+<span class="sourceLineNo">2259</span> }<a name="line.2259"></a>
+<span class="sourceLineNo">2260</span> return regions;<a name="line.2260"></a>
+<span class="sourceLineNo">2261</span> }<a name="line.2261"></a>
+<span class="sourceLineNo">2262</span><a name="line.2262"></a>
+<span class="sourceLineNo">2263</span> private void processAssignQueue() {<a name="line.2263"></a>
+<span class="sourceLineNo">2264</span> final HashMap<RegionInfo, RegionStateNode> regions = waitOnAssignQueue();<a name="line.2264"></a>
+<span class="sourceLineNo">2265</span> if (regions == null || regions.size() == 0 || !isRunning()) {<a name="line.2265"></a>
... 7161 lines suppressed ...