You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/11/04 14:52:57 UTC
[06/13] hbase-site git commit: Published site at
ea0f1391f1f7e95f915d72004603d22da150b340.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/083aa100/devapidocs/src-html/org/apache/hadoop/hbase/master/HMaster.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/HMaster.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/HMaster.html
index b31c78e..c3171c5 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/HMaster.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/HMaster.html
@@ -1089,2879 +1089,2885 @@
<span class="sourceLineNo">1081</span> this.assignmentManager.joinCluster();<a name="line.1081"></a>
<span class="sourceLineNo">1082</span> // The below depends on hbase:meta being online.<a name="line.1082"></a>
<span class="sourceLineNo">1083</span> this.tableStateManager.start();<a name="line.1083"></a>
-<span class="sourceLineNo">1084</span> // Initialize after meta is up as below scans meta<a name="line.1084"></a>
-<span class="sourceLineNo">1085</span> if (favoredNodesManager != null && !maintenanceMode) {<a name="line.1085"></a>
-<span class="sourceLineNo">1086</span> SnapshotOfRegionAssignmentFromMeta snapshotOfRegionAssignment =<a name="line.1086"></a>
-<span class="sourceLineNo">1087</span> new SnapshotOfRegionAssignmentFromMeta(getConnection());<a name="line.1087"></a>
-<span class="sourceLineNo">1088</span> snapshotOfRegionAssignment.initialize();<a name="line.1088"></a>
-<span class="sourceLineNo">1089</span> favoredNodesManager.initialize(snapshotOfRegionAssignment);<a name="line.1089"></a>
-<span class="sourceLineNo">1090</span> }<a name="line.1090"></a>
-<span class="sourceLineNo">1091</span><a name="line.1091"></a>
-<span class="sourceLineNo">1092</span> // set cluster status again after user regions are assigned<a name="line.1092"></a>
-<span class="sourceLineNo">1093</span> this.balancer.setClusterMetrics(getClusterMetricsWithoutCoprocessor());<a name="line.1093"></a>
-<span class="sourceLineNo">1094</span><a name="line.1094"></a>
-<span class="sourceLineNo">1095</span> // Start balancer and meta catalog janitor after meta and regions have been assigned.<a name="line.1095"></a>
-<span class="sourceLineNo">1096</span> status.setStatus("Starting balancer and catalog janitor");<a name="line.1096"></a>
-<span class="sourceLineNo">1097</span> this.clusterStatusChore = new ClusterStatusChore(this, balancer);<a name="line.1097"></a>
-<span class="sourceLineNo">1098</span> getChoreService().scheduleChore(clusterStatusChore);<a name="line.1098"></a>
-<span class="sourceLineNo">1099</span> this.balancerChore = new BalancerChore(this);<a name="line.1099"></a>
-<span class="sourceLineNo">1100</span> getChoreService().scheduleChore(balancerChore);<a name="line.1100"></a>
-<span class="sourceLineNo">1101</span> this.normalizerChore = new RegionNormalizerChore(this);<a name="line.1101"></a>
-<span class="sourceLineNo">1102</span> getChoreService().scheduleChore(normalizerChore);<a name="line.1102"></a>
-<span class="sourceLineNo">1103</span> this.catalogJanitorChore = new CatalogJanitor(this);<a name="line.1103"></a>
-<span class="sourceLineNo">1104</span> getChoreService().scheduleChore(catalogJanitorChore);<a name="line.1104"></a>
-<span class="sourceLineNo">1105</span> this.serverManager.startChore();<a name="line.1105"></a>
-<span class="sourceLineNo">1106</span><a name="line.1106"></a>
-<span class="sourceLineNo">1107</span> // NAMESPACE READ!!!!<a name="line.1107"></a>
-<span class="sourceLineNo">1108</span> // Here we expect hbase:namespace to be online. See inside initClusterSchemaService.<a name="line.1108"></a>
-<span class="sourceLineNo">1109</span> // TODO: Fix this. Namespace is a pain being a sort-of system table. Fold it in to hbase:meta.<a name="line.1109"></a>
-<span class="sourceLineNo">1110</span> // isNamespace does like isMeta and waits until namespace is onlined before allowing progress.<a name="line.1110"></a>
-<span class="sourceLineNo">1111</span> if (!waitForNamespaceOnline()) {<a name="line.1111"></a>
-<span class="sourceLineNo">1112</span> return;<a name="line.1112"></a>
-<span class="sourceLineNo">1113</span> }<a name="line.1113"></a>
-<span class="sourceLineNo">1114</span> status.setStatus("Starting cluster schema service");<a name="line.1114"></a>
-<span class="sourceLineNo">1115</span> initClusterSchemaService();<a name="line.1115"></a>
-<span class="sourceLineNo">1116</span><a name="line.1116"></a>
-<span class="sourceLineNo">1117</span> if (this.cpHost != null) {<a name="line.1117"></a>
-<span class="sourceLineNo">1118</span> try {<a name="line.1118"></a>
-<span class="sourceLineNo">1119</span> this.cpHost.preMasterInitialization();<a name="line.1119"></a>
-<span class="sourceLineNo">1120</span> } catch (IOException e) {<a name="line.1120"></a>
-<span class="sourceLineNo">1121</span> LOG.error("Coprocessor preMasterInitialization() hook failed", e);<a name="line.1121"></a>
-<span class="sourceLineNo">1122</span> }<a name="line.1122"></a>
-<span class="sourceLineNo">1123</span> }<a name="line.1123"></a>
-<span class="sourceLineNo">1124</span><a name="line.1124"></a>
-<span class="sourceLineNo">1125</span> status.markComplete("Initialization successful");<a name="line.1125"></a>
-<span class="sourceLineNo">1126</span> LOG.info(String.format("Master has completed initialization %.3fsec",<a name="line.1126"></a>
-<span class="sourceLineNo">1127</span> (System.currentTimeMillis() - masterActiveTime) / 1000.0f));<a name="line.1127"></a>
-<span class="sourceLineNo">1128</span> this.masterFinishedInitializationTime = System.currentTimeMillis();<a name="line.1128"></a>
-<span class="sourceLineNo">1129</span> configurationManager.registerObserver(this.balancer);<a name="line.1129"></a>
-<span class="sourceLineNo">1130</span> configurationManager.registerObserver(this.hfileCleaner);<a name="line.1130"></a>
-<span class="sourceLineNo">1131</span> configurationManager.registerObserver(this.logCleaner);<a name="line.1131"></a>
-<span class="sourceLineNo">1132</span> // Set master as 'initialized'.<a name="line.1132"></a>
-<span class="sourceLineNo">1133</span> setInitialized(true);<a name="line.1133"></a>
-<span class="sourceLineNo">1134</span><a name="line.1134"></a>
-<span class="sourceLineNo">1135</span> if (maintenanceMode) {<a name="line.1135"></a>
-<span class="sourceLineNo">1136</span> LOG.info("Detected repair mode, skipping final initialization steps.");<a name="line.1136"></a>
-<span class="sourceLineNo">1137</span> return;<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> assignmentManager.checkIfShouldMoveSystemRegionAsync();<a name="line.1140"></a>
-<span class="sourceLineNo">1141</span> status.setStatus("Assign meta replicas");<a name="line.1141"></a>
-<span class="sourceLineNo">1142</span> MasterMetaBootstrap metaBootstrap = createMetaBootstrap();<a name="line.1142"></a>
-<span class="sourceLineNo">1143</span> metaBootstrap.assignMetaReplicas();<a name="line.1143"></a>
-<span class="sourceLineNo">1144</span> status.setStatus("Starting quota manager");<a name="line.1144"></a>
-<span class="sourceLineNo">1145</span> initQuotaManager();<a name="line.1145"></a>
-<span class="sourceLineNo">1146</span> if (QuotaUtil.isQuotaEnabled(conf)) {<a name="line.1146"></a>
-<span class="sourceLineNo">1147</span> // Create the quota snapshot notifier<a name="line.1147"></a>
-<span class="sourceLineNo">1148</span> spaceQuotaSnapshotNotifier = createQuotaSnapshotNotifier();<a name="line.1148"></a>
-<span class="sourceLineNo">1149</span> spaceQuotaSnapshotNotifier.initialize(getClusterConnection());<a name="line.1149"></a>
-<span class="sourceLineNo">1150</span> this.quotaObserverChore = new QuotaObserverChore(this, getMasterMetrics());<a name="line.1150"></a>
-<span class="sourceLineNo">1151</span> // Start the chore to read the region FS space reports and act on them<a name="line.1151"></a>
-<span class="sourceLineNo">1152</span> getChoreService().scheduleChore(quotaObserverChore);<a name="line.1152"></a>
-<span class="sourceLineNo">1153</span><a name="line.1153"></a>
-<span class="sourceLineNo">1154</span> this.snapshotQuotaChore = new SnapshotQuotaObserverChore(this, getMasterMetrics());<a name="line.1154"></a>
-<span class="sourceLineNo">1155</span> // Start the chore to read snapshots and add their usage to table/NS quotas<a name="line.1155"></a>
-<span class="sourceLineNo">1156</span> getChoreService().scheduleChore(snapshotQuotaChore);<a name="line.1156"></a>
-<span class="sourceLineNo">1157</span> }<a name="line.1157"></a>
-<span class="sourceLineNo">1158</span><a name="line.1158"></a>
-<span class="sourceLineNo">1159</span> // clear the dead servers with same host name and port of online server because we are not<a name="line.1159"></a>
-<span class="sourceLineNo">1160</span> // removing dead server with same hostname and port of rs which is trying to check in before<a name="line.1160"></a>
-<span class="sourceLineNo">1161</span> // master initialization. See HBASE-5916.<a name="line.1161"></a>
-<span class="sourceLineNo">1162</span> this.serverManager.clearDeadServersWithSameHostNameAndPortOfOnlineServer();<a name="line.1162"></a>
-<span class="sourceLineNo">1163</span><a name="line.1163"></a>
-<span class="sourceLineNo">1164</span> // Check and set the znode ACLs if needed in case we are overtaking a non-secure configuration<a name="line.1164"></a>
-<span class="sourceLineNo">1165</span> status.setStatus("Checking ZNode ACLs");<a name="line.1165"></a>
-<span class="sourceLineNo">1166</span> zooKeeper.checkAndSetZNodeAcls();<a name="line.1166"></a>
-<span class="sourceLineNo">1167</span><a name="line.1167"></a>
-<span class="sourceLineNo">1168</span> status.setStatus("Initializing MOB Cleaner");<a name="line.1168"></a>
-<span class="sourceLineNo">1169</span> initMobCleaner();<a name="line.1169"></a>
-<span class="sourceLineNo">1170</span><a name="line.1170"></a>
-<span class="sourceLineNo">1171</span> status.setStatus("Calling postStartMaster coprocessors");<a name="line.1171"></a>
-<span class="sourceLineNo">1172</span> if (this.cpHost != null) {<a name="line.1172"></a>
-<span class="sourceLineNo">1173</span> // don't let cp initialization errors kill the master<a name="line.1173"></a>
-<span class="sourceLineNo">1174</span> try {<a name="line.1174"></a>
-<span class="sourceLineNo">1175</span> this.cpHost.postStartMaster();<a name="line.1175"></a>
-<span class="sourceLineNo">1176</span> } catch (IOException ioe) {<a name="line.1176"></a>
-<span class="sourceLineNo">1177</span> LOG.error("Coprocessor postStartMaster() hook failed", ioe);<a name="line.1177"></a>
-<span class="sourceLineNo">1178</span> }<a name="line.1178"></a>
-<span class="sourceLineNo">1179</span> }<a name="line.1179"></a>
-<span class="sourceLineNo">1180</span><a name="line.1180"></a>
-<span class="sourceLineNo">1181</span> zombieDetector.interrupt();<a name="line.1181"></a>
-<span class="sourceLineNo">1182</span><a name="line.1182"></a>
-<span class="sourceLineNo">1183</span> /*<a name="line.1183"></a>
-<span class="sourceLineNo">1184</span> * After master has started up, lets do balancer post startup initialization. Since this runs<a name="line.1184"></a>
-<span class="sourceLineNo">1185</span> * in activeMasterManager thread, it should be fine.<a name="line.1185"></a>
-<span class="sourceLineNo">1186</span> */<a name="line.1186"></a>
-<span class="sourceLineNo">1187</span> long start = System.currentTimeMillis();<a name="line.1187"></a>
-<span class="sourceLineNo">1188</span> this.balancer.postMasterStartupInitialize();<a name="line.1188"></a>
-<span class="sourceLineNo">1189</span> if (LOG.isDebugEnabled()) {<a name="line.1189"></a>
-<span class="sourceLineNo">1190</span> LOG.debug("Balancer post startup initialization complete, took " + (<a name="line.1190"></a>
-<span class="sourceLineNo">1191</span> (System.currentTimeMillis() - start) / 1000) + " seconds");<a name="line.1191"></a>
-<span class="sourceLineNo">1192</span> }<a name="line.1192"></a>
-<span class="sourceLineNo">1193</span> }<a name="line.1193"></a>
-<span class="sourceLineNo">1194</span><a name="line.1194"></a>
-<span class="sourceLineNo">1195</span> /**<a name="line.1195"></a>
-<span class="sourceLineNo">1196</span> * Check hbase:meta is up and ready for reading. For use during Master startup only.<a name="line.1196"></a>
-<span class="sourceLineNo">1197</span> * @return True if meta is UP and online and startup can progress. Otherwise, meta is not online<a name="line.1197"></a>
-<span class="sourceLineNo">1198</span> * and we will hold here until operator intervention.<a name="line.1198"></a>
-<span class="sourceLineNo">1199</span> */<a name="line.1199"></a>
-<span class="sourceLineNo">1200</span> @VisibleForTesting<a name="line.1200"></a>
-<span class="sourceLineNo">1201</span> public boolean waitForMetaOnline() throws InterruptedException {<a name="line.1201"></a>
-<span class="sourceLineNo">1202</span> return isRegionOnline(RegionInfoBuilder.FIRST_META_REGIONINFO);<a name="line.1202"></a>
-<span class="sourceLineNo">1203</span> }<a name="line.1203"></a>
-<span class="sourceLineNo">1204</span><a name="line.1204"></a>
-<span class="sourceLineNo">1205</span> /**<a name="line.1205"></a>
-<span class="sourceLineNo">1206</span> * @return True if region is online and scannable else false if an error or shutdown (Otherwise<a name="line.1206"></a>
-<span class="sourceLineNo">1207</span> * we just block in here holding up all forward-progess).<a name="line.1207"></a>
-<span class="sourceLineNo">1208</span> */<a name="line.1208"></a>
-<span class="sourceLineNo">1209</span> private boolean isRegionOnline(RegionInfo ri) throws InterruptedException {<a name="line.1209"></a>
-<span class="sourceLineNo">1210</span> RetryCounter rc = null;<a name="line.1210"></a>
-<span class="sourceLineNo">1211</span> while (!isStopped()) {<a name="line.1211"></a>
-<span class="sourceLineNo">1212</span> RegionState rs = this.assignmentManager.getRegionStates().getRegionState(ri);<a name="line.1212"></a>
-<span class="sourceLineNo">1213</span> if (rs.isOpened()) {<a name="line.1213"></a>
-<span class="sourceLineNo">1214</span> if (this.getServerManager().isServerOnline(rs.getServerName())) {<a name="line.1214"></a>
-<span class="sourceLineNo">1215</span> return true;<a name="line.1215"></a>
-<span class="sourceLineNo">1216</span> }<a name="line.1216"></a>
-<span class="sourceLineNo">1217</span> }<a name="line.1217"></a>
-<span class="sourceLineNo">1218</span> // Region is not OPEN.<a name="line.1218"></a>
-<span class="sourceLineNo">1219</span> Optional<Procedure<MasterProcedureEnv>> optProc = this.procedureExecutor.getProcedures().<a name="line.1219"></a>
-<span class="sourceLineNo">1220</span> stream().filter(p -> p instanceof ServerCrashProcedure).findAny();<a name="line.1220"></a>
-<span class="sourceLineNo">1221</span> // TODO: Add a page to refguide on how to do repair. Have this log message point to it.<a name="line.1221"></a>
-<span class="sourceLineNo">1222</span> // Page will talk about loss of edits, how to schedule at least the meta WAL recovery, and<a name="line.1222"></a>
-<span class="sourceLineNo">1223</span> // then how to assign including how to break region lock if one held.<a name="line.1223"></a>
-<span class="sourceLineNo">1224</span> LOG.warn("{} is NOT online; state={}; ServerCrashProcedures={}. Master startup cannot " +<a name="line.1224"></a>
-<span class="sourceLineNo">1225</span> "progress, in holding-pattern until region onlined.",<a name="line.1225"></a>
-<span class="sourceLineNo">1226</span> ri.getRegionNameAsString(), rs, optProc.isPresent());<a name="line.1226"></a>
-<span class="sourceLineNo">1227</span> // Check once-a-minute.<a name="line.1227"></a>
-<span class="sourceLineNo">1228</span> if (rc == null) {<a name="line.1228"></a>
-<span class="sourceLineNo">1229</span> rc = new RetryCounterFactory(1000).create();<a name="line.1229"></a>
-<span class="sourceLineNo">1230</span> }<a name="line.1230"></a>
-<span class="sourceLineNo">1231</span> Threads.sleep(rc.getBackoffTimeAndIncrementAttempts());<a name="line.1231"></a>
-<span class="sourceLineNo">1232</span> }<a name="line.1232"></a>
-<span class="sourceLineNo">1233</span> return false;<a name="line.1233"></a>
-<span class="sourceLineNo">1234</span> }<a name="line.1234"></a>
-<span class="sourceLineNo">1235</span><a name="line.1235"></a>
-<span class="sourceLineNo">1236</span> /**<a name="line.1236"></a>
-<span class="sourceLineNo">1237</span> * Check hbase:namespace table is assigned. If not, startup will hang looking for the ns table<a name="line.1237"></a>
-<span class="sourceLineNo">1238</span> * (TODO: Fix this! NS should not hold-up startup).<a name="line.1238"></a>
-<span class="sourceLineNo">1239</span> * @return True if namespace table is up/online.<a name="line.1239"></a>
-<span class="sourceLineNo">1240</span> */<a name="line.1240"></a>
-<span class="sourceLineNo">1241</span> @VisibleForTesting<a name="line.1241"></a>
-<span class="sourceLineNo">1242</span> public boolean waitForNamespaceOnline() throws InterruptedException {<a name="line.1242"></a>
-<span class="sourceLineNo">1243</span> List<RegionInfo> ris = this.assignmentManager.getRegionStates().<a name="line.1243"></a>
-<span class="sourceLineNo">1244</span> getRegionsOfTable(TableName.NAMESPACE_TABLE_NAME);<a name="line.1244"></a>
-<span class="sourceLineNo">1245</span> if (ris.isEmpty()) {<a name="line.1245"></a>
-<span class="sourceLineNo">1246</span> // If empty, means we've not assigned the namespace table yet... Just return true so startup<a name="line.1246"></a>
-<span class="sourceLineNo">1247</span> // continues and the namespace table gets created.<a name="line.1247"></a>
-<span class="sourceLineNo">1248</span> return true;<a name="line.1248"></a>
-<span class="sourceLineNo">1249</span> }<a name="line.1249"></a>
-<span class="sourceLineNo">1250</span> // Else there are namespace regions up in meta. Ensure they are assigned before we go on.<a name="line.1250"></a>
-<span class="sourceLineNo">1251</span> for (RegionInfo ri: ris) {<a name="line.1251"></a>
-<span class="sourceLineNo">1252</span> isRegionOnline(ri);<a name="line.1252"></a>
-<span class="sourceLineNo">1253</span> }<a name="line.1253"></a>
-<span class="sourceLineNo">1254</span> return true;<a name="line.1254"></a>
-<span class="sourceLineNo">1255</span> }<a name="line.1255"></a>
-<span class="sourceLineNo">1256</span><a name="line.1256"></a>
-<span class="sourceLineNo">1257</span> /**<a name="line.1257"></a>
-<span class="sourceLineNo">1258</span> * Adds the {@code MasterQuotasObserver} to the list of configured Master observers to<a name="line.1258"></a>
-<span class="sourceLineNo">1259</span> * automatically remove quotas for a table when that table is deleted.<a name="line.1259"></a>
-<span class="sourceLineNo">1260</span> */<a name="line.1260"></a>
-<span class="sourceLineNo">1261</span> @VisibleForTesting<a name="line.1261"></a>
-<span class="sourceLineNo">1262</span> public void updateConfigurationForQuotasObserver(Configuration conf) {<a name="line.1262"></a>
-<span class="sourceLineNo">1263</span> // We're configured to not delete quotas on table deletion, so we don't need to add the obs.<a name="line.1263"></a>
-<span class="sourceLineNo">1264</span> if (!conf.getBoolean(<a name="line.1264"></a>
-<span class="sourceLineNo">1265</span> MasterQuotasObserver.REMOVE_QUOTA_ON_TABLE_DELETE,<a name="line.1265"></a>
-<span class="sourceLineNo">1266</span> MasterQuotasObserver.REMOVE_QUOTA_ON_TABLE_DELETE_DEFAULT)) {<a name="line.1266"></a>
-<span class="sourceLineNo">1267</span> return;<a name="line.1267"></a>
-<span class="sourceLineNo">1268</span> }<a name="line.1268"></a>
-<span class="sourceLineNo">1269</span> String[] masterCoprocs = conf.getStrings(CoprocessorHost.MASTER_COPROCESSOR_CONF_KEY);<a name="line.1269"></a>
-<span class="sourceLineNo">1270</span> final int length = null == masterCoprocs ? 0 : masterCoprocs.length;<a name="line.1270"></a>
-<span class="sourceLineNo">1271</span> String[] updatedCoprocs = new String[length + 1];<a name="line.1271"></a>
-<span class="sourceLineNo">1272</span> if (length > 0) {<a name="line.1272"></a>
-<span class="sourceLineNo">1273</span> System.arraycopy(masterCoprocs, 0, updatedCoprocs, 0, masterCoprocs.length);<a name="line.1273"></a>
+<span class="sourceLineNo">1084</span> // Below has to happen after tablestatemanager has started in the case where this hbase-2.x<a name="line.1084"></a>
+<span class="sourceLineNo">1085</span> // is being started over an hbase-1.x dataset. tablestatemanager runs a migration as part<a name="line.1085"></a>
+<span class="sourceLineNo">1086</span> // of its 'start' moving table state from zookeeper to hbase:meta. This migration needs to<a name="line.1086"></a>
+<span class="sourceLineNo">1087</span> // complete before we do this next step processing offline regions else it fails reading<a name="line.1087"></a>
+<span class="sourceLineNo">1088</span> // table states messing up master launch (namespace table, etc., are not assigned).<a name="line.1088"></a>
+<span class="sourceLineNo">1089</span> this.assignmentManager.processOfflineRegions();<a name="line.1089"></a>
+<span class="sourceLineNo">1090</span> // Initialize after meta is up as below scans meta<a name="line.1090"></a>
+<span class="sourceLineNo">1091</span> if (favoredNodesManager != null && !maintenanceMode) {<a name="line.1091"></a>
+<span class="sourceLineNo">1092</span> SnapshotOfRegionAssignmentFromMeta snapshotOfRegionAssignment =<a name="line.1092"></a>
+<span class="sourceLineNo">1093</span> new SnapshotOfRegionAssignmentFromMeta(getConnection());<a name="line.1093"></a>
+<span class="sourceLineNo">1094</span> snapshotOfRegionAssignment.initialize();<a name="line.1094"></a>
+<span class="sourceLineNo">1095</span> favoredNodesManager.initialize(snapshotOfRegionAssignment);<a name="line.1095"></a>
+<span class="sourceLineNo">1096</span> }<a name="line.1096"></a>
+<span class="sourceLineNo">1097</span><a name="line.1097"></a>
+<span class="sourceLineNo">1098</span> // set cluster status again after user regions are assigned<a name="line.1098"></a>
+<span class="sourceLineNo">1099</span> this.balancer.setClusterMetrics(getClusterMetricsWithoutCoprocessor());<a name="line.1099"></a>
+<span class="sourceLineNo">1100</span><a name="line.1100"></a>
+<span class="sourceLineNo">1101</span> // Start balancer and meta catalog janitor after meta and regions have been assigned.<a name="line.1101"></a>
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