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HBASE-22567 [HBCK2] Add new methods for dealing with missing regions …
…in META while Master is online Signed-off-by: stack <stack@apache.org>
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| /** | ||
| * 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.hbase; | ||
|
|
||
| import org.apache.hadoop.conf.Configuration; | ||
| import org.apache.hadoop.fs.FileSystem; | ||
| import org.apache.hadoop.fs.Path; | ||
| import org.apache.hadoop.hbase.HConstants; | ||
| import org.apache.hadoop.hbase.MetaTableAccessor; | ||
| import org.apache.hadoop.hbase.TableName; | ||
| import org.apache.hadoop.hbase.client.Connection; | ||
| import org.apache.hadoop.hbase.client.ConnectionFactory; | ||
| import org.apache.hadoop.hbase.client.RegionInfo; | ||
| import org.apache.hadoop.hbase.regionserver.HRegionFileSystem; | ||
| import org.apache.hadoop.hbase.util.CommonFSUtils; | ||
| import org.apache.hadoop.hbase.util.FSUtils; | ||
| import org.apache.logging.log4j.LogManager; | ||
| import org.apache.logging.log4j.Logger; | ||
|
|
||
| import java.io.Closeable; | ||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.HashMap; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.stream.Collectors; | ||
|
|
||
| /** | ||
| * This class implements the inner works required for check and recover regions that wrongly | ||
| * went missing in META. | ||
| * Normally HBCK2 fix options rely on Master self-contained information to recover/fix | ||
| * inconsistencies, but this an exception case where META table is in a broken state. | ||
| * So, it assumes HDFS state as the source of truth, in other words, methods provided here consider | ||
| * meta information found on HDFS region dirs as the valid ones. | ||
| */ | ||
| public class FsRegionsMetaRecoverer implements Closeable { | ||
| private static final Logger LOG = LogManager.getLogger(FsRegionsMetaRecoverer.class); | ||
| private final FileSystem fs; | ||
| private final Connection conn; | ||
| private final Configuration config; | ||
|
|
||
| public FsRegionsMetaRecoverer(Configuration configuration) throws IOException { | ||
| this.config = configuration; | ||
| this.fs = CommonFSUtils.getRootDirFileSystem(configuration); | ||
| this.conn = ConnectionFactory.createConnection(configuration); | ||
| } | ||
|
|
||
| /*Initially defined for test only purposes */ | ||
| FsRegionsMetaRecoverer(Configuration configuration, Connection connection, FileSystem fileSystem){ | ||
| this.config = configuration; | ||
| this.conn = connection; | ||
| this.fs = fileSystem; | ||
| } | ||
|
|
||
| private List<Path> getTableRegionsDirs(String table) throws Exception { | ||
| String hbaseRoot = this.config.get(HConstants.HBASE_DIR); | ||
| Path tableDir = FSUtils.getTableDir(new Path(hbaseRoot), TableName.valueOf(table)); | ||
| return FSUtils.getRegionDirs(fs, tableDir); | ||
| } | ||
|
|
||
| public Map<TableName,List<Path>> reportTablesMissingRegions(final List<String> namespacesOrTables) | ||
| throws IOException { | ||
| final Map<TableName,List<Path>> result = new HashMap<>(); | ||
| List<TableName> tableNames = MetaTableAccessor.getTableStates(this.conn).keySet().stream() | ||
| .filter(tableName -> { | ||
| if(namespacesOrTables==null || namespacesOrTables.isEmpty()){ | ||
| return true; | ||
| } else { | ||
| Optional<String> findings = namespacesOrTables.stream().filter( | ||
| name -> (name.indexOf(":") > 0) ? | ||
| tableName.equals(TableName.valueOf(name)) : | ||
| tableName.getNamespaceAsString().equals(name)).findFirst(); | ||
| return findings.isPresent(); | ||
| } | ||
| }).collect(Collectors.toList()); | ||
| tableNames.stream().forEach(tableName -> { | ||
| try { | ||
| result.put(tableName, | ||
| findMissingRegionsInMETA(tableName.getNameWithNamespaceInclAsString())); | ||
| } catch (Exception e) { | ||
| LOG.warn(e); | ||
| } | ||
| }); | ||
| return result; | ||
| } | ||
|
|
||
| List<Path> findMissingRegionsInMETA(String table) throws Exception { | ||
| final List<Path> missingRegions = new ArrayList<>(); | ||
| final List<Path> regionsDirs = getTableRegionsDirs(table); | ||
| TableName tableName = TableName.valueOf(table); | ||
| List<RegionInfo> regionInfos = MetaTableAccessor. | ||
| getTableRegions(this.conn, tableName, false); | ||
| HashSet<String> regionsInMeta = regionInfos.stream().map(info -> | ||
| info.getEncodedName()).collect(Collectors.toCollection(HashSet::new)); | ||
| for(final Path regionDir : regionsDirs){ | ||
| if (!regionsInMeta.contains(regionDir.getName())) { | ||
| LOG.debug(regionDir + "is not in META."); | ||
| missingRegions.add(regionDir); | ||
| } | ||
| } | ||
| return missingRegions; | ||
| } | ||
|
|
||
| public void putRegionInfoFromHdfsInMeta(Path region) throws IOException { | ||
| RegionInfo info = HRegionFileSystem.loadRegionInfoFileContent(fs, region); | ||
| MetaTableAccessor.addRegionToMeta(conn, info); | ||
| } | ||
|
|
||
| @Override public void close() throws IOException { | ||
| this.conn.close(); | ||
| } | ||
| } |
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