| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.hbase.master; |
| |
| import java.io.IOException; |
| import java.io.InterruptedIOException; |
| import java.util.NavigableSet; |
| |
| import org.apache.commons.lang.StringUtils; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.CellUtil; |
| import org.apache.hadoop.hbase.DoNotRetryIOException; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.HRegionInfo; |
| import org.apache.hadoop.hbase.HTableDescriptor; |
| import org.apache.hadoop.hbase.MetaTableAccessor; |
| import org.apache.hadoop.hbase.NamespaceDescriptor; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.ZKNamespaceManager; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.client.Delete; |
| import org.apache.hadoop.hbase.client.Get; |
| import org.apache.hadoop.hbase.client.Put; |
| import org.apache.hadoop.hbase.client.Result; |
| import org.apache.hadoop.hbase.client.ResultScanner; |
| import org.apache.hadoop.hbase.client.Table; |
| import org.apache.hadoop.hbase.client.TableState; |
| import org.apache.hadoop.hbase.constraint.ConstraintException; |
| import org.apache.hadoop.hbase.exceptions.TimeoutIOException; |
| import org.apache.hadoop.hbase.master.procedure.CreateTableProcedure; |
| import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv; |
| import org.apache.hadoop.hbase.procedure2.ProcedureExecutor; |
| 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.Threads; |
| |
| import com.google.common.collect.Sets; |
| |
| /** |
| * This is a helper class used internally to manage the namespace metadata that is stored in |
| * TableName.NAMESPACE_TABLE_NAME. It also mirrors updates to the ZK store by forwarding updates to |
| * {@link org.apache.hadoop.hbase.ZKNamespaceManager}. |
| * |
| * WARNING: Do not use. Go via the higher-level {@link ClusterSchema} API instead. This manager |
| * is likely to go aways anyways. |
| */ |
| @InterfaceAudience.Private |
| @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="IS2_INCONSISTENT_SYNC", |
| justification="TODO: synchronize access on nsTable but it is done in tiers above and this " + |
| "class is going away/shrinking") |
| public class TableNamespaceManager { |
| private static final Log LOG = LogFactory.getLog(TableNamespaceManager.class); |
| |
| private Configuration conf; |
| private MasterServices masterServices; |
| private Table nsTable = null; // FindBugs: IS2_INCONSISTENT_SYNC TODO: Access is not synchronized |
| private ZKNamespaceManager zkNamespaceManager; |
| private boolean initialized; |
| |
| public static final String KEY_MAX_REGIONS = "hbase.namespace.quota.maxregions"; |
| public static final String KEY_MAX_TABLES = "hbase.namespace.quota.maxtables"; |
| static final String NS_INIT_TIMEOUT = "hbase.master.namespace.init.timeout"; |
| static final int DEFAULT_NS_INIT_TIMEOUT = 300000; |
| |
| TableNamespaceManager(MasterServices masterServices) { |
| this.masterServices = masterServices; |
| this.conf = masterServices.getConfiguration(); |
| } |
| |
| public void start() throws IOException { |
| if (!MetaTableAccessor.tableExists(masterServices.getConnection(), |
| TableName.NAMESPACE_TABLE_NAME)) { |
| LOG.info("Namespace table not found. Creating..."); |
| createNamespaceTable(masterServices); |
| } |
| |
| try { |
| // Wait for the namespace table to be initialized. |
| long startTime = EnvironmentEdgeManager.currentTime(); |
| int timeout = conf.getInt(NS_INIT_TIMEOUT, DEFAULT_NS_INIT_TIMEOUT); |
| while (!isTableAvailableAndInitialized()) { |
| if (EnvironmentEdgeManager.currentTime() - startTime + 100 > timeout) { |
| // We can't do anything if ns is not online. |
| throw new IOException("Timedout " + timeout + "ms waiting for namespace table to " |
| + "be assigned and enabled: " + getTableState()); |
| } |
| Thread.sleep(100); |
| } |
| } catch (InterruptedException e) { |
| throw (InterruptedIOException) new InterruptedIOException().initCause(e); |
| } |
| } |
| |
| private synchronized Table getNamespaceTable() throws IOException { |
| if (!isTableNamespaceManagerInitialized()) { |
| throw new IOException(this.getClass().getName() + " isn't ready to serve"); |
| } |
| return nsTable; |
| } |
| |
| /* |
| * check whether a namespace has already existed. |
| */ |
| public boolean doesNamespaceExist(final String namespaceName) throws IOException { |
| if (nsTable == null) { |
| throw new IOException(this.getClass().getName() + " isn't ready to serve"); |
| } |
| return (get(nsTable, namespaceName) != null); |
| } |
| |
| public synchronized NamespaceDescriptor get(String name) throws IOException { |
| if (!isTableNamespaceManagerInitialized()) { |
| return null; |
| } |
| return zkNamespaceManager.get(name); |
| } |
| |
| private NamespaceDescriptor get(Table table, String name) throws IOException { |
| Result res = table.get(new Get(Bytes.toBytes(name))); |
| if (res.isEmpty()) { |
| return null; |
| } |
| byte[] val = CellUtil.cloneValue(res.getColumnLatestCell( |
| HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES, HTableDescriptor.NAMESPACE_COL_DESC_BYTES)); |
| return |
| ProtobufUtil.toNamespaceDescriptor( |
| HBaseProtos.NamespaceDescriptor.parseFrom(val)); |
| } |
| |
| public void insertIntoNSTable(final NamespaceDescriptor ns) throws IOException { |
| if (nsTable == null) { |
| throw new IOException(this.getClass().getName() + " isn't ready to serve"); |
| } |
| Put p = new Put(Bytes.toBytes(ns.getName())); |
| p.addImmutable(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES, |
| HTableDescriptor.NAMESPACE_COL_DESC_BYTES, |
| ProtobufUtil.toProtoNamespaceDescriptor(ns).toByteArray()); |
| nsTable.put(p); |
| } |
| |
| public void updateZKNamespaceManager(final NamespaceDescriptor ns) throws IOException { |
| try { |
| zkNamespaceManager.update(ns); |
| } catch (IOException ex) { |
| String msg = "Failed to update namespace information in ZK."; |
| LOG.error(msg, ex); |
| throw new IOException(msg, ex); |
| } |
| } |
| |
| public void removeFromNSTable(final String namespaceName) throws IOException { |
| if (nsTable == null) { |
| throw new IOException(this.getClass().getName() + " isn't ready to serve"); |
| } |
| Delete d = new Delete(Bytes.toBytes(namespaceName)); |
| nsTable.delete(d); |
| } |
| |
| public void removeFromZKNamespaceManager(final String namespaceName) throws IOException { |
| zkNamespaceManager.remove(namespaceName); |
| } |
| |
| public synchronized NavigableSet<NamespaceDescriptor> list() throws IOException { |
| NavigableSet<NamespaceDescriptor> ret = |
| Sets.newTreeSet(NamespaceDescriptor.NAMESPACE_DESCRIPTOR_COMPARATOR); |
| ResultScanner scanner = |
| getNamespaceTable().getScanner(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES); |
| try { |
| for(Result r : scanner) { |
| byte[] val = CellUtil.cloneValue(r.getColumnLatestCell( |
| HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES, |
| HTableDescriptor.NAMESPACE_COL_DESC_BYTES)); |
| ret.add(ProtobufUtil.toNamespaceDescriptor( |
| HBaseProtos.NamespaceDescriptor.parseFrom(val))); |
| } |
| } finally { |
| scanner.close(); |
| } |
| return ret; |
| } |
| |
| private void createNamespaceTable(MasterServices masterServices) throws IOException { |
| HRegionInfo[] newRegions = new HRegionInfo[]{ |
| new HRegionInfo(HTableDescriptor.NAMESPACE_TABLEDESC.getTableName(), null, null)}; |
| |
| // we need to create the table this way to bypass checkInitialized |
| masterServices.getMasterProcedureExecutor() |
| .submitProcedure(new CreateTableProcedure( |
| masterServices.getMasterProcedureExecutor().getEnvironment(), |
| HTableDescriptor.NAMESPACE_TABLEDESC, |
| newRegions)); |
| } |
| |
| @SuppressWarnings("deprecation") |
| private boolean isTableNamespaceManagerInitialized() throws IOException { |
| if (initialized) { |
| this.nsTable = this.masterServices.getConnection().getTable(TableName.NAMESPACE_TABLE_NAME); |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Create Namespace in a blocking manner. Keeps trying until |
| * {@link ClusterSchema.HBASE_MASTER_CLUSTER_SCHEMA_OPERATION_TIMEOUT_KEY} expires. |
| * Note, by-passes notifying coprocessors and name checks. Use for system namespaces only. |
| */ |
| private void blockingCreateNamespace(final NamespaceDescriptor namespaceDescriptor) |
| throws IOException { |
| ClusterSchema clusterSchema = this.masterServices.getClusterSchema(); |
| long procId = |
| clusterSchema.createNamespace(namespaceDescriptor, HConstants.NO_NONCE, HConstants.NO_NONCE); |
| block(this.masterServices, procId); |
| } |
| |
| |
| /** |
| * An ugly utility to be removed when refactor TableNamespaceManager. |
| * @throws TimeoutIOException |
| */ |
| private static void block(final MasterServices services, final long procId) |
| throws TimeoutIOException { |
| int timeoutInMillis = services.getConfiguration(). |
| getInt(ClusterSchema.HBASE_MASTER_CLUSTER_SCHEMA_OPERATION_TIMEOUT_KEY, |
| ClusterSchema.DEFAULT_HBASE_MASTER_CLUSTER_SCHEMA_OPERATION_TIMEOUT); |
| long deadlineTs = EnvironmentEdgeManager.currentTime() + timeoutInMillis; |
| ProcedureExecutor<MasterProcedureEnv> procedureExecutor = |
| services.getMasterProcedureExecutor(); |
| while(EnvironmentEdgeManager.currentTime() < deadlineTs) { |
| if (procedureExecutor.isFinished(procId)) return; |
| // Sleep some |
| Threads.sleep(10); |
| } |
| throw new TimeoutIOException("Procedure " + procId + " is still running"); |
| } |
| |
| /** |
| * This method checks if the namespace table is assigned and then |
| * tries to create its Table reference. If it was already created before, it also makes |
| * sure that the connection isn't closed. |
| * @return true if the namespace table manager is ready to serve, false otherwise |
| */ |
| @SuppressWarnings("deprecation") |
| public synchronized boolean isTableAvailableAndInitialized() |
| throws IOException { |
| // Did we already get a table? If so, still make sure it's available |
| if (isTableNamespaceManagerInitialized()) { |
| return true; |
| } |
| |
| // Now check if the table is assigned, if not then fail fast |
| if (isTableAssigned() && isTableEnabled()) { |
| try { |
| boolean initGoodSofar = true; |
| nsTable = this.masterServices.getConnection().getTable(TableName.NAMESPACE_TABLE_NAME); |
| zkNamespaceManager = new ZKNamespaceManager(masterServices.getZooKeeper()); |
| zkNamespaceManager.start(); |
| |
| if (get(nsTable, NamespaceDescriptor.DEFAULT_NAMESPACE.getName()) == null) { |
| blockingCreateNamespace(NamespaceDescriptor.DEFAULT_NAMESPACE); |
| } |
| if (get(nsTable, NamespaceDescriptor.SYSTEM_NAMESPACE.getName()) == null) { |
| blockingCreateNamespace(NamespaceDescriptor.SYSTEM_NAMESPACE); |
| } |
| |
| if (!initGoodSofar) { |
| // some required namespace is created asynchronized. We should complete init later. |
| return false; |
| } |
| |
| ResultScanner scanner = nsTable.getScanner(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES); |
| try { |
| for (Result result : scanner) { |
| byte[] val = CellUtil.cloneValue(result.getColumnLatestCell( |
| HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES, |
| HTableDescriptor.NAMESPACE_COL_DESC_BYTES)); |
| NamespaceDescriptor ns = |
| ProtobufUtil.toNamespaceDescriptor( |
| HBaseProtos.NamespaceDescriptor.parseFrom(val)); |
| zkNamespaceManager.update(ns); |
| } |
| } finally { |
| scanner.close(); |
| } |
| initialized = true; |
| return true; |
| } catch (IOException ie) { |
| LOG.warn("Caught exception in initializing namespace table manager", ie); |
| if (nsTable != null) { |
| nsTable.close(); |
| } |
| throw ie; |
| } |
| } |
| return false; |
| } |
| |
| private TableState.State getTableState() throws IOException { |
| return masterServices.getTableStateManager().getTableState(TableName.NAMESPACE_TABLE_NAME); |
| } |
| |
| private boolean isTableEnabled() throws IOException { |
| return getTableState().equals(TableState.State.ENABLED); |
| } |
| |
| private boolean isTableAssigned() { |
| return !masterServices.getAssignmentManager() |
| .getRegionStates().getRegionsOfTable(TableName.NAMESPACE_TABLE_NAME).isEmpty(); |
| } |
| |
| public void validateTableAndRegionCount(NamespaceDescriptor desc) throws IOException { |
| if (getMaxRegions(desc) <= 0) { |
| throw new ConstraintException("The max region quota for " + desc.getName() |
| + " is less than or equal to zero."); |
| } |
| if (getMaxTables(desc) <= 0) { |
| throw new ConstraintException("The max tables quota for " + desc.getName() |
| + " is less than or equal to zero."); |
| } |
| } |
| |
| public static long getMaxTables(NamespaceDescriptor ns) throws IOException { |
| String value = ns.getConfigurationValue(KEY_MAX_TABLES); |
| long maxTables = 0; |
| if (StringUtils.isNotEmpty(value)) { |
| try { |
| maxTables = Long.parseLong(value); |
| } catch (NumberFormatException exp) { |
| throw new DoNotRetryIOException("NumberFormatException while getting max tables.", exp); |
| } |
| } else { |
| // The property is not set, so assume its the max long value. |
| maxTables = Long.MAX_VALUE; |
| } |
| return maxTables; |
| } |
| |
| public static long getMaxRegions(NamespaceDescriptor ns) throws IOException { |
| String value = ns.getConfigurationValue(KEY_MAX_REGIONS); |
| long maxRegions = 0; |
| if (StringUtils.isNotEmpty(value)) { |
| try { |
| maxRegions = Long.parseLong(value); |
| } catch (NumberFormatException exp) { |
| throw new DoNotRetryIOException("NumberFormatException while getting max regions.", exp); |
| } |
| } else { |
| // The property is not set, so assume its the max long value. |
| maxRegions = Long.MAX_VALUE; |
| } |
| return maxRegions; |
| } |
| } |