| /* |
| * 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.iotdb.db.tools; |
| |
| import org.apache.iotdb.db.engine.fileSystem.SystemFileFactory; |
| import org.apache.iotdb.db.exception.SystemCheckException; |
| import org.apache.iotdb.db.writelog.io.SingleFileLogReader; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import static org.apache.iotdb.db.writelog.node.ExclusiveWriteLogNode.WAL_FILE_NAME; |
| |
| /** WalChecker verifies that whether all insert ahead logs in the WAL folder are recognizable. */ |
| public class WalChecker { |
| |
| private static final Logger logger = LoggerFactory.getLogger(WalChecker.class); |
| |
| /** the root dir of wals, which should have wal directories of storage groups as its children. */ |
| private String walFolder; |
| |
| public WalChecker(String walFolder) { |
| this.walFolder = walFolder; |
| } |
| |
| /** |
| * check the root wal dir and find the damaged files |
| * |
| * @return a list of damaged files. |
| * @throws SystemCheckException if the root wal dir does not exist. |
| */ |
| public List<File> doCheck() throws SystemCheckException { |
| File walFolderFile = SystemFileFactory.INSTANCE.getFile(walFolder); |
| logger.info("Checking folder: {}", walFolderFile.getAbsolutePath()); |
| if (!walFolderFile.exists() || !walFolderFile.isDirectory()) { |
| throw new SystemCheckException(walFolder); |
| } |
| |
| File[] storageWalFolders = walFolderFile.listFiles(); |
| if (storageWalFolders == null || storageWalFolders.length == 0) { |
| logger.info("No sub-directories under the given directory, check ends"); |
| return Collections.emptyList(); |
| } |
| |
| List<File> failedFiles = new ArrayList<>(); |
| for (int dirIndex = 0; dirIndex < storageWalFolders.length; dirIndex++) { |
| File storageWalFolder = storageWalFolders[dirIndex]; |
| logger.info("Checking the No.{} directory {}", dirIndex, storageWalFolder.getName()); |
| File walFile = SystemFileFactory.INSTANCE.getFile(storageWalFolder, WAL_FILE_NAME); |
| if (!checkFile(walFile)) { |
| failedFiles.add(walFile); |
| } |
| } |
| return failedFiles; |
| } |
| |
| private boolean checkFile(File walFile) { |
| if (!walFile.exists()) { |
| logger.debug("No wal file in this dir, skipping"); |
| return true; |
| } |
| |
| if (walFile.length() > 0 && walFile.length() < SingleFileLogReader.LEAST_LOG_SIZE) { |
| // contains only one damaged log |
| logger.error( |
| "{} fails the check because it is non-empty but does not contain enough bytes " |
| + "even for one log.", |
| walFile.getAbsoluteFile()); |
| return false; |
| } |
| |
| SingleFileLogReader logReader = null; |
| try { |
| logReader = new SingleFileLogReader(walFile); |
| while (logReader.hasNext()) { |
| logReader.next(); |
| } |
| if (logReader.isFileCorrupted()) { |
| return false; |
| } |
| } catch (IOException e) { |
| logger.error("{} fails the check because", walFile.getAbsoluteFile(), e); |
| return false; |
| } finally { |
| if (logReader != null) { |
| logReader.close(); |
| } |
| } |
| return true; |
| } |
| |
| // a temporary method which should be in the integrated self-check module in the future |
| public static void report(List<File> failedFiles) { |
| if (failedFiles.isEmpty()) { |
| logger.info("Check finished. There is no damaged file"); |
| } else { |
| logger.error("There are {} failed files. They are {}", failedFiles.size(), failedFiles); |
| } |
| } |
| |
| /** @param args walRootDirectory */ |
| public static void main(String[] args) throws SystemCheckException { |
| if (args.length < 1) { |
| logger.error("No enough args: require the walRootDirectory"); |
| return; |
| } |
| |
| WalChecker checker = new WalChecker(args[0]); |
| List<File> files = checker.doCheck(); |
| report(files); |
| } |
| } |