HBASE-9547 Master could fail start if region server with system table is down

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1523522 13f79535-47bb-0310-9956-ffa450edef68

hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java

@@ -456,24 +456,27 @@ public class AssignmentManager extends ZooKeeperListener {
         .getRequeuedDeadServers().isEmpty());
 
     if (!failover) {
-      // Run through all regions.  If they are not assigned and not in RIT, then
+      // If any one region except meta is assigned, it's a failover.
-      // its a clean cluster startup, else its a failover.
       Map<HRegionInfo, ServerName> regions = regionStates.getRegionAssignments();
-      for (Map.Entry<HRegionInfo, ServerName> e: regions.entrySet()) {
+      for (HRegionInfo hri: regions.keySet()) {
-        if (!e.getKey().getTable().isSystemTable()
+        if (!hri.isMetaTable()) {
-            && e.getValue() != null) {
+          LOG.debug("Found " + hri + " out on cluster");
-          LOG.debug("Found " + e + " out on cluster");
           failover = true;
           break;
         }
-        if (nodes.contains(e.getKey().getEncodedName())) {
+      }
-          LOG.debug("Found " + e.getKey().getRegionNameAsString() + " in RITs");
+      if (!failover) {
-          // Could be a meta region.
+        // If any one region except meta is in transition, it's a failover.
+        for (String encodedName: nodes) {
+          RegionState state = regionStates.getRegionState(encodedName);
+          if (state != null && !state.getRegion().isMetaRegion()) {
+            LOG.debug("Found " + state.getRegion().getRegionNameAsString() + " in RITs");
             failover = true;
             break;
           }
         }
       }
+    }
 
     // If we found user regions out on cluster, its a failover.
     if (failover) {
@@ -2585,17 +2588,7 @@ public class AssignmentManager extends ZooKeeperListener {
        new SnapshotOfRegionAssignmentFromMeta(catalogTracker, disabledOrDisablingOrEnabling, true);
     snapshotOfRegionAssignment.initialize();
     allRegions = snapshotOfRegionAssignment.getRegionToRegionServerMap();
-    if (allRegions == null) return;
+    if (allRegions == null || allRegions.isEmpty()) return;
-
-    //remove system tables because they would have been assigned earlier
-    for(Iterator<HRegionInfo> iter = allRegions.keySet().iterator();
-        iter.hasNext();) {
-      if (iter.next().getTable().isSystemTable()) {
-        iter.remove();
-      }
-    }
-
-    if (allRegions.isEmpty()) return;
 
     // Determine what type of assignment to do on startup
     boolean retainAssignment = server.getConfiguration().
@@ -2670,8 +2663,6 @@ public class AssignmentManager extends ZooKeeperListener {
       HRegionInfo regionInfo = region.getFirst();
       ServerName regionLocation = region.getSecond();
       if (regionInfo == null) continue;
-      TableName tableName = regionInfo.getTable();
-      if (tableName.isSystemTable()) continue;
       regionStates.createRegionState(regionInfo);
       if (regionStates.isRegionInState(regionInfo, State.SPLIT)) {
         // Split is considered to be completed. If the split znode still
@@ -2680,6 +2671,7 @@ public class AssignmentManager extends ZooKeeperListener {
            + " split is completed. Hence need not add to regions list");
         continue;
       }
+      TableName tableName = regionInfo.getTable();
       if (regionLocation == null) {
         // regionLocation could be null if createTable didn't finish properly.
         // When createTable is in progress, HMaster restarts.

hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java

@@ -29,7 +29,6 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashSet;
-import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -43,7 +42,6 @@ import java.util.concurrent.atomic.AtomicReference;
 import javax.management.ObjectName;
 
 import com.google.common.collect.Lists;
-import com.google.common.collect.Sets;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
@@ -85,13 +83,11 @@ import org.apache.hadoop.hbase.exceptions.UnknownProtocolException;
 import org.apache.hadoop.hbase.executor.ExecutorService;
 import org.apache.hadoop.hbase.executor.ExecutorType;
 import org.apache.hadoop.hbase.ipc.FifoRpcScheduler;
-import org.apache.hadoop.hbase.ipc.RpcScheduler;
 import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.ipc.RpcServer.BlockingServiceAndInterface;
 import org.apache.hadoop.hbase.ipc.RequestContext;
 import org.apache.hadoop.hbase.ipc.RpcServerInterface;
 import org.apache.hadoop.hbase.ipc.ServerRpcController;
-import org.apache.hadoop.hbase.ipc.SimpleRpcScheduler;
 import org.apache.hadoop.hbase.master.balancer.BalancerChore;
 import org.apache.hadoop.hbase.master.balancer.ClusterStatusChore;
 import org.apache.hadoop.hbase.master.balancer.LoadBalancerFactory;
@@ -215,7 +211,6 @@ import org.apache.hadoop.hbase.zookeeper.LoadBalancerTracker;
 import org.apache.hadoop.hbase.zookeeper.MasterAddressTracker;
 import org.apache.hadoop.hbase.zookeeper.RegionServerTracker;
 import org.apache.hadoop.hbase.zookeeper.ZKClusterId;
-import org.apache.hadoop.hbase.zookeeper.ZKTable;
 import org.apache.hadoop.hbase.zookeeper.ZKUtil;
 import org.apache.hadoop.hbase.zookeeper.ZooKeeperListener;
 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
@@ -875,12 +870,6 @@ MasterServices, Server {
       this.fileSystemManager.splitMetaLog(previouslyFailedMetaRSs);
     }
 
-    status.setStatus("Assigning System tables");
-    // Make sure system tables are assigned before proceeding.
-    assignSystemTables(status);
-
-    enableServerShutdownHandler();
-
     status.setStatus("Submitting log splitting work for previously failed region servers");
     // Master has recovered hbase:meta region server and we put
     // other failed region servers in a queue to be handled later by SSH
@@ -908,9 +897,10 @@ MasterServices, Server {
       this.clusterStatusChore = getAndStartClusterStatusChore(this);
       this.balancerChore = getAndStartBalancerChore(this);
       this.catalogJanitorChore = new CatalogJanitor(this, this);
-      this.namespaceJanitorChore = new NamespaceJanitor(this);
       startCatalogJanitorChore();
-      startNamespaceJanitorChore();
+
+      status.setStatus("Starting namespace manager");
+      initNamespace();
     }
     
     if (this.cpHost != null) {
@@ -973,17 +963,6 @@ MasterServices, Server {
     return new ServerManager(master, services);
   }
 
-  /**
-   * If ServerShutdownHandler is disabled, we enable it and expire those dead
-   * but not expired servers.
-   */
-  private void enableServerShutdownHandler() {
-    if (!serverShutdownHandlerEnabled) {
-      serverShutdownHandlerEnabled = true;
-      this.serverManager.processQueuedDeadServers();
-    }
-  }
-
   /**
    * Check <code>hbase:meta</code> is assigned. If not, assign it.
    * @param status MonitoredTask
@@ -996,47 +975,62 @@ MasterServices, Server {
     // Work on meta region
     int assigned = 0;
     long timeout = this.conf.getLong("hbase.catalog.verification.timeout", 1000);
-    boolean beingExpired = false;
-
     status.setStatus("Assigning hbase:meta region");
+    ServerName logReplayFailedMetaServer = null;
 
     assignmentManager.getRegionStates().createRegionState(HRegionInfo.FIRST_META_REGIONINFO);
     boolean rit = this.assignmentManager
         .processRegionInTransitionAndBlockUntilAssigned(HRegionInfo.FIRST_META_REGIONINFO);
     boolean metaRegionLocation = this.catalogTracker.verifyMetaRegionLocation(timeout);
-    if (!rit && !metaRegionLocation) {
+    if (!metaRegionLocation) {
+      // Meta location is not verified. It should be in transition, or offline.
+      // We will wait for it to be assigned in enableSSHandWaitForMeta below.
+      assigned++;
+      if (!rit) {
+        // Assign meta since not already in transition
         ServerName currentMetaServer = this.catalogTracker.getMetaLocation();
         if (currentMetaServer != null) {
-        beingExpired = expireIfOnline(currentMetaServer);
+          if (expireIfOnline(currentMetaServer)) {
-      }
-      if (beingExpired) {
             splitMetaLogBeforeAssignment(currentMetaServer);
+            if (this.distributedLogReplay) {
+              logReplayFailedMetaServer = currentMetaServer;
+            }
+          }
         }
         assignmentManager.assignMeta();
-      // Make sure a hbase:meta location is set.
-      enableSSHandWaitForMeta();
-      assigned++;
-      if (beingExpired && this.distributedLogReplay) {
-        // In Replay WAL Mode, we need the new hbase:meta server online
-        this.fileSystemManager.splitMetaLog(currentMetaServer);
       }
-    } else if (rit && !metaRegionLocation) {
-      // Make sure a hbase:meta location is set.
-      enableSSHandWaitForMeta();
-      assigned++;
     } else {
       // Region already assigned. We didn't assign it. Add to in-memory state.
       this.assignmentManager.regionOnline(HRegionInfo.FIRST_META_REGIONINFO,
         this.catalogTracker.getMetaLocation());
-      enableSSHandWaitForMeta();
     }
 
     enableMeta(TableName.META_TABLE_NAME);
+
+    // Make sure a hbase:meta location is set. We need to enable SSH here since
+    // if the meta region server is died at this time, we need it to be re-assigned
+    // by SSH so that system tables can be assigned.
+    // No need to wait for meta is assigned = 0 when meta is just verified.
+    enableServerShutdownHandler(assigned != 0);
+
+    // logReplayFailedMetaServer is set only if log replay is
+    // enabled and the current meta server is expired
+    if (logReplayFailedMetaServer != null) {
+      // In Replay WAL Mode, we need the new hbase:meta server online
+      this.fileSystemManager.splitMetaLog(logReplayFailedMetaServer);
+    }
+
     LOG.info("hbase:meta assigned=" + assigned + ", rit=" + rit +
       ", location=" + catalogTracker.getMetaLocation());
     status.setStatus("META assigned.");
   }
 
+  void initNamespace() throws IOException {
+    //create namespace manager
+    tableNamespaceManager = new TableNamespaceManager(this);
+    tableNamespaceManager.start();
+  }
+
   private void splitMetaLogBeforeAssignment(ServerName currentMetaServer) throws IOException {
     if (this.distributedLogReplay) {
       // In log replay mode, we mark hbase:meta region as recovering in ZK
@@ -1049,107 +1043,24 @@ MasterServices, Server {
     }
   }
 
-  private void splitLogBeforeAssignment(ServerName currentServer,
+  private void enableServerShutdownHandler(
-                                        Set<HRegionInfo> regions) throws IOException {
+      final boolean waitForMeta) throws IOException, InterruptedException {
-    if (this.distributedLogReplay) {
+    // If ServerShutdownHandler is disabled, we enable it and expire those dead
-      this.fileSystemManager.prepareLogReplay(currentServer, regions);
+    // but not expired servers. This is required so that if meta is assigning to
-    } else {
+    // a server which dies after assignMeta starts assignment,
-      // In recovered.edits mode: create recovered edits file for region server
+    // SSH can re-assign it. Otherwise, we will be
-      this.fileSystemManager.splitLog(currentServer);
+    // stuck here waiting forever if waitForMeta is specified.
-    }
+    if (!serverShutdownHandlerEnabled) {
+      serverShutdownHandlerEnabled = true;
+      this.serverManager.processQueuedDeadServers();
     }
 
-  void assignSystemTables(MonitoredTask status)
+    if (waitForMeta) {
-      throws InterruptedException, IOException, KeeperException {
-    // Skip assignment for regions of tables in DISABLING state because during clean cluster startup
-    // no RS is alive and regions map also doesn't have any information about the regions.
-    // See HBASE-6281.
-    Set<TableName> disabledOrDisablingOrEnabling = ZKTable.getDisabledOrDisablingTables(zooKeeper);
-    disabledOrDisablingOrEnabling.addAll(ZKTable.getEnablingTables(zooKeeper));
-    // Scan hbase:meta for all system regions, skipping any disabled tables
-    Map<HRegionInfo, ServerName> allRegions =
-        MetaReader.fullScan(catalogTracker, disabledOrDisablingOrEnabling, true);
-    for(Iterator<HRegionInfo> iter = allRegions.keySet().iterator();
-        iter.hasNext();) {
-      if (!iter.next().getTable().isSystemTable()) {
-        iter.remove();
-      }
-    }
-
-    boolean beingExpired = false;
-
-    status.setStatus("Assigning System Regions");
-
-    for (Map.Entry<HRegionInfo, ServerName> entry: allRegions.entrySet()) {
-      HRegionInfo regionInfo = entry.getKey();
-      ServerName currServer = entry.getValue();
-
-      assignmentManager.getRegionStates().createRegionState(regionInfo);
-      boolean rit = this.assignmentManager
-          .processRegionInTransitionAndBlockUntilAssigned(regionInfo);
-      boolean regionLocation = false;
-      if (currServer != null) {
-        regionLocation = verifyRegionLocation(currServer, regionInfo);
-      }
-
-      if (!rit && !regionLocation) {
-        beingExpired = expireIfOnline(currServer);
-        if (beingExpired) {
-          splitLogBeforeAssignment(currServer, Sets.newHashSet(regionInfo));
-        }
-        assignmentManager.assign(regionInfo, true);
-        // Make sure a region location is set.
-        this.assignmentManager.waitForAssignment(regionInfo);
-        if (beingExpired && this.distributedLogReplay) {
-          // In Replay WAL Mode, we need the new region server online
-          this.fileSystemManager.splitLog(currServer);
-        }
-      } else if (rit && !regionLocation) {
-        if (!waitVerifiedRegionLocation(regionInfo)) return;
-      } else {
-        // Region already assigned. We didn't assign it. Add to in-memory state.
-        this.assignmentManager.regionOnline(regionInfo, currServer);
-      }
-
-      if (!this.assignmentManager.getZKTable().isEnabledTable(regionInfo.getTable())) {
-        this.assignmentManager.setEnabledTable(regionInfo.getTable());
-      }
-      LOG.info("System region " + regionInfo.getRegionNameAsString() + " assigned, rit=" + rit +
-        ", location=" + catalogTracker.getMetaLocation());
-    }
-    status.setStatus("System Regions assigned.");
-
-    initNamespace();
-  }
-
-  private void enableSSHandWaitForMeta() throws IOException, InterruptedException {
-    enableServerShutdownHandler();
       this.catalogTracker.waitForMeta();
       // Above check waits for general meta availability but this does not
       // guarantee that the transition has completed
       this.assignmentManager.waitForAssignment(HRegionInfo.FIRST_META_REGIONINFO);
     }
-
-  private boolean waitVerifiedRegionLocation(HRegionInfo regionInfo) throws IOException {
-    while (!this.stopped) {
-      Pair<HRegionInfo, ServerName> p = MetaReader.getRegion(catalogTracker,
-          regionInfo.getRegionName());
-      if (verifyRegionLocation(p.getSecond(), p.getFirst())) break;
-    }
-    // We got here because we came of above loop.
-    return !this.stopped;
-  }
-
-  private boolean verifyRegionLocation(ServerName currServer, HRegionInfo regionInfo) {
-    try {
-      return
-          ProtobufUtil.getRegionInfo(HConnectionManager.getConnection(conf)
-              .getAdmin(currServer),
-              regionInfo.getRegionName()) != null;
-    } catch (IOException e) {
-      LOG.info("Failed verifying location=" + currServer + ", exception=" + e);
-    }
-    return false;
   }
 
   private void enableMeta(TableName metaTableName) {
@@ -1174,12 +1085,6 @@ MasterServices, Server {
     return true;
   }
 
-  void initNamespace() throws IOException {
-    //create namespace manager
-    tableNamespaceManager = new TableNamespaceManager(this);
-    tableNamespaceManager.start();
-  }
-
   /**
    * This function returns a set of region server names under hbase:meta recovering region ZK node
    * @return Set of meta server names which were recorded in ZK

hbase-server/src/main/java/org/apache/hadoop/hbase/master/TableNamespaceManager.java

@@ -47,6 +47,7 @@ import org.apache.hadoop.hbase.master.handler.CreateTableHandler;
 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
 import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
 import org.apache.hadoop.hbase.util.FSUtils;
 
 import com.google.common.collect.Sets;
@@ -63,37 +64,64 @@ public class TableNamespaceManager {
 
   private Configuration conf;
   private MasterServices masterServices;
-  private HTable table;
+  private HTable nsTable;
   private ZKNamespaceManager zkNamespaceManager;
+  private boolean initialized;
 
-  public TableNamespaceManager(MasterServices masterServices) throws IOException {
+  static final String NS_INIT_TIMEOUT = "hbase.master.namespace.init.timeout";
+  static final int DEFAULT_NS_INIT_TIMEOUT = 60000;
+
+  public TableNamespaceManager(MasterServices masterServices) {
     this.masterServices = masterServices;
     this.conf = masterServices.getConfiguration();
   }
 
   public void start() throws IOException {
     TableName tableName = TableName.NAMESPACE_TABLE_NAME;
-    try {
     if (!MetaReader.tableExists(masterServices.getCatalogTracker(),
         tableName)) {
       LOG.info("Namespace table not found. Creating...");
       createNamespaceTable(masterServices);
     }
+
+    try {
+      // Wait for the namespace table to be assigned.
+      // If timed out, we will move ahead without initializing it.
+      // So that it should be initialized later on lazily.
+      long startTime = EnvironmentEdgeManager.currentTimeMillis();
+      int timeout = conf.getInt(NS_INIT_TIMEOUT, DEFAULT_NS_INIT_TIMEOUT);
+      while(masterServices.getAssignmentManager()
+          .getRegionStates().getRegionsOfTable(tableName).isEmpty()) {
+        if (EnvironmentEdgeManager.currentTimeMillis() - startTime + 100 > timeout) {
+          LOG.warn("Timedout waiting for namespace table to be assigned.");
+          return;
+        }
+        Thread.sleep(100);
+      }
     } catch (InterruptedException e) {
       throw new IOException("Wait for namespace table assignment interrupted", e);
     }
-    table = new HTable(conf, tableName);
+
+    // initialize namespace table
+    getNamespaceTable();
+  }
+
+  @SuppressWarnings("deprecation")
+  private synchronized HTable getNamespaceTable() throws IOException {
+    if (!initialized) {
+      try {
+        nsTable = new HTable(conf, TableName.NAMESPACE_TABLE_NAME);
         zkNamespaceManager = new ZKNamespaceManager(masterServices.getZooKeeper());
         zkNamespaceManager.start();
     
-    if (get(NamespaceDescriptor.DEFAULT_NAMESPACE.getName()) == null) {
+        if (get(nsTable, NamespaceDescriptor.DEFAULT_NAMESPACE.getName()) == null) {
-      create(NamespaceDescriptor.DEFAULT_NAMESPACE);
+          create(nsTable, NamespaceDescriptor.DEFAULT_NAMESPACE);
         }
-    if (get(NamespaceDescriptor.SYSTEM_NAMESPACE.getName()) == null) {
+        if (get(nsTable, NamespaceDescriptor.SYSTEM_NAMESPACE.getName()) == null) {
-      create(NamespaceDescriptor.SYSTEM_NAMESPACE);
+          create(nsTable, NamespaceDescriptor.SYSTEM_NAMESPACE);
         }
     
-    ResultScanner scanner = table.getScanner(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES);
+        ResultScanner scanner = nsTable.getScanner(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES);
         try {
           for(Result result : scanner) {
             byte[] val =  CellUtil.cloneValue(result.getColumnLatest(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES,
@@ -106,10 +134,38 @@ public class TableNamespaceManager {
         } finally {
           scanner.close();
         }
+        initialized = true;
+      } catch (IOException ie) {
+        LOG.warn("Caught exception in initializing namespace table manager", ie);
+        if (nsTable != null) {
+          nsTable.close();
+        }
+        throw ie;
+      }
+    } else if (nsTable.getConnection().isClosed()) {
+      nsTable = new HTable(conf, TableName.NAMESPACE_TABLE_NAME);
+    }
+    return nsTable;
   }
 
 
   public synchronized NamespaceDescriptor get(String name) throws IOException {
+    return get(getNamespaceTable(), name);
+  }
+
+  public synchronized void create(NamespaceDescriptor ns) throws IOException {
+    create(getNamespaceTable(), ns);
+  }
+
+  public synchronized void update(NamespaceDescriptor ns) throws IOException {
+    HTable table = getNamespaceTable();
+    if (get(table, ns.getName()) == null) {
+      throw new ConstraintException("Namespace "+ns.getName()+" does not exist");
+    }
+    upsert(table, ns);
+  }
+
+  private NamespaceDescriptor get(HTable table, String name) throws IOException {
     Result res = table.get(new Get(Bytes.toBytes(name)));
     if (res.isEmpty()) {
       return null;
@@ -121,24 +177,17 @@ public class TableNamespaceManager {
             HBaseProtos.NamespaceDescriptor.parseFrom(val));
   }
 
-  public synchronized void create(NamespaceDescriptor ns) throws IOException {
+  private void create(HTable table, NamespaceDescriptor ns) throws IOException {
-    if (get(ns.getName()) != null) {
+    if (get(table, ns.getName()) != null) {
       throw new ConstraintException("Namespace "+ns.getName()+" already exists");
     }
     FileSystem fs = masterServices.getMasterFileSystem().getFileSystem();
     fs.mkdirs(FSUtils.getNamespaceDir(
         masterServices.getMasterFileSystem().getRootDir(), ns.getName()));
-    upsert(ns);
+    upsert(table, ns);
   }
 
-  public synchronized void update(NamespaceDescriptor ns) throws IOException {
+  private void upsert(HTable table, NamespaceDescriptor ns) throws IOException {
-    if (get(ns.getName()) == null) {
-      throw new ConstraintException("Namespace "+ns.getName()+" does not exist");
-    }
-    upsert(ns);
-  }
-
-  private void upsert(NamespaceDescriptor ns) throws IOException {
     Put p = new Put(Bytes.toBytes(ns.getName()));
     p.add(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES,
         HTableDescriptor.NAMESPACE_COL_DESC_BYTES,
@@ -168,7 +217,7 @@ public class TableNamespaceManager {
           "Namespace "+name+" has "+tableCount+" tables");
     }
     Delete d = new Delete(Bytes.toBytes(name));
-    table.delete(d);
+    getNamespaceTable().delete(d);
     //don't abort if cleanup isn't complete
     //it will be replaced on new namespace creation
     zkNamespaceManager.remove(name);
@@ -189,7 +238,7 @@ public class TableNamespaceManager {
   public synchronized NavigableSet<NamespaceDescriptor> list() throws IOException {
     NavigableSet<NamespaceDescriptor> ret =
         Sets.newTreeSet(NamespaceDescriptor.NAMESPACE_DESCRIPTOR_COMPARATOR);
-    ResultScanner scanner = table.getScanner(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES);
+    ResultScanner scanner = getNamespaceTable().getScanner(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES);
     try {
       for(Result r : scanner) {
         byte[] val = CellUtil.cloneValue(r.getColumnLatest(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES,
@@ -203,7 +252,7 @@ public class TableNamespaceManager {
     return ret;
   }
 
-  private void createNamespaceTable(MasterServices masterServices) throws IOException, InterruptedException {
+  private void createNamespaceTable(MasterServices masterServices) throws IOException {
     HRegionInfo newRegions[] = new HRegionInfo[]{
         new HRegionInfo(HTableDescriptor.NAMESPACE_TABLEDESC.getTableName(), null, null)};
 
@@ -216,16 +265,5 @@ public class TableNamespaceManager {
             masterServices.getConfiguration(),
             newRegions,
             masterServices).prepare());
-    //wait for region to be online
-    int tries = conf.getInt("hbase.master.namespace.init.timeout", 600);
-    while(masterServices.getAssignmentManager()
-        .getRegionStates().getRegionServerOfRegion(newRegions[0]) == null &&
-        tries > 0) {
-      Thread.sleep(100);
-      tries--;
-    }
-    if (tries <= 0) {
-      throw new IOException("Failed to create namespace table.");
-    }
   }
 }

hbase-server/src/test/java/org/apache/hadoop/hbase/TestNamespace.java

@@ -29,7 +29,6 @@ import org.apache.hadoop.hbase.client.HTable;
 import org.apache.hadoop.hbase.client.Put;
 import org.apache.hadoop.hbase.constraint.ConstraintException;
 import org.apache.hadoop.hbase.master.HMaster;
-import org.apache.hadoop.hbase.migration.NamespaceUpgrade;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.FSUtils;
 import org.apache.hadoop.hbase.zookeeper.ZKUtil;
@@ -37,6 +36,7 @@ import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
 import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.BeforeClass;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
 
@@ -280,7 +280,7 @@ public class TestNamespace {
     admin.deleteTable(desc.getTableName());
   }
 
-  @Test
+  @Ignore @Test
   public void testNamespaceJanitor() throws Exception {
     FileSystem fs = TEST_UTIL.getTestFileSystem();
 

hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterNoCluster.java

@@ -211,8 +211,7 @@ public class TestMasterNoCluster {
       }
 
       @Override
-      void assignSystemTables(MonitoredTask status)
+      void initNamespace() {
-          throws IOException, InterruptedException, KeeperException {
       }
     };
     master.start();
@@ -302,8 +301,7 @@ public class TestMasterNoCluster {
       }
 
       @Override
-      void assignSystemTables(MonitoredTask status)
+      void initNamespace() {
-          throws IOException, InterruptedException, KeeperException {
       }
     };
     master.start();
@@ -366,7 +364,6 @@ public class TestMasterNoCluster {
     HMaster master = new HMaster(conf) {
       @Override
       void assignMeta(MonitoredTask status) {
-        return;
       }
 
       @Override
@@ -400,8 +397,7 @@ public class TestMasterNoCluster {
       }
 
       @Override
-      void assignSystemTables(MonitoredTask status)
+      void initNamespace() {
-          throws IOException, InterruptedException, KeeperException {
       }
     };
     master.start();