private void pre019Upgrade() throws Exception {
    long index = -1;
    File metaDataFile = null;
    MetaData metaData = null;
    long version = -1;
    for (File dataLocation : nodeEnv.nodeDataLocations()) {
      File stateLocation = new File(dataLocation, "_state");
      if (!stateLocation.exists()) {
        continue;
      }
      File[] stateFiles = stateLocation.listFiles();
      if (stateFiles == null) {
        continue;
      }
      for (File stateFile : stateFiles) {
        if (logger.isTraceEnabled()) {
          logger.trace("[upgrade]: processing [" + stateFile.getName() + "]");
        }
        String name = stateFile.getName();
        if (!name.startsWith("metadata-")) {
          continue;
        }
        long fileIndex = Long.parseLong(name.substring(name.indexOf('-') + 1));
        if (fileIndex >= index) {
          // try and read the meta data
          try {
            byte[] data = Streams.copyToByteArray(new FileInputStream(stateFile));
            if (data.length == 0) {
              continue;
            }
            XContentParser parser = XContentHelper.createParser(data, 0, data.length);
            try {
              String currentFieldName = null;
              XContentParser.Token token = parser.nextToken();
              if (token != null) {
                while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
                  if (token == XContentParser.Token.FIELD_NAME) {
                    currentFieldName = parser.currentName();
                  } else if (token == XContentParser.Token.START_OBJECT) {
                    if ("meta-data".equals(currentFieldName)) {
                      metaData = MetaData.Builder.fromXContent(parser);
                    }
                  } else if (token.isValue()) {
                    if ("version".equals(currentFieldName)) {
                      version = parser.longValue();
                    }
                  }
                }
              }
            } finally {
              parser.close();
            }
            index = fileIndex;
            metaDataFile = stateFile;
          } catch (IOException e) {
            logger.warn("failed to read pre 0.19 state from [" + name + "], ignoring...", e);
          }
        }
      }
    }
    if (metaData == null) {
      return;
    }

    logger.info(
        "found old metadata state, loading metadata from [{}] and converting to new metadata location and strucutre...",
        metaDataFile.getAbsolutePath());

    writeGlobalState(
        "upgrade", MetaData.builder().metaData(metaData).version(version).build(), null);
    for (IndexMetaData indexMetaData : metaData) {
      IndexMetaData.Builder indexMetaDataBuilder =
          IndexMetaData.newIndexMetaDataBuilder(indexMetaData).version(version);
      // set the created version to 0.18
      indexMetaDataBuilder.settings(
          ImmutableSettings.settingsBuilder()
              .put(indexMetaData.settings())
              .put(IndexMetaData.SETTING_VERSION_CREATED, Version.V_0_18_0));
      writeIndex("upgrade", indexMetaDataBuilder.build(), null);
    }

    // rename shards state to backup state
    File backupFile = new File(metaDataFile.getParentFile(), "backup-" + metaDataFile.getName());
    if (!metaDataFile.renameTo(backupFile)) {
      throw new IOException(
          "failed to rename old state to backup state [" + metaDataFile.getAbsolutePath() + "]");
    }

    // delete all other shards state files
    for (File dataLocation : nodeEnv.nodeDataLocations()) {
      File stateLocation = new File(dataLocation, "_state");
      if (!stateLocation.exists()) {
        continue;
      }
      File[] stateFiles = stateLocation.listFiles();
      if (stateFiles == null) {
        continue;
      }
      for (File stateFile : stateFiles) {
        String name = stateFile.getName();
        if (!name.startsWith("metadata-")) {
          continue;
        }
        stateFile.delete();
      }
    }

    logger.info(
        "conversion to new metadata location and format done, backup create at [{}]",
        backupFile.getAbsolutePath());
  }
Пример #2
0
 public static Snapshot fromXContent(XContentParser parser) throws IOException {
   String name = null;
   Version version = Version.CURRENT;
   SnapshotState state = SnapshotState.IN_PROGRESS;
   String reason = null;
   List<String> indices = Collections.emptyList();
   long startTime = 0;
   long endTime = 0;
   int totalShard = 0;
   int successfulShards = 0;
   List<SnapshotShardFailure> shardFailures = NO_FAILURES;
   if (parser.currentToken() == null) { // fresh parser? move to the first token
     parser.nextToken();
   }
   if (parser.currentToken()
       == XContentParser.Token.START_OBJECT) { // on a start object move to next token
     parser.nextToken();
   }
   XContentParser.Token token;
   if ((token = parser.nextToken()) == XContentParser.Token.START_OBJECT) {
     String currentFieldName = parser.currentName();
     if ("snapshot".equals(currentFieldName)) {
       while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
         if (token == XContentParser.Token.FIELD_NAME) {
           currentFieldName = parser.currentName();
           token = parser.nextToken();
           if (token.isValue()) {
             if ("name".equals(currentFieldName)) {
               name = parser.text();
             } else if ("state".equals(currentFieldName)) {
               state = SnapshotState.valueOf(parser.text());
             } else if ("reason".equals(currentFieldName)) {
               reason = parser.text();
             } else if ("start_time".equals(currentFieldName)) {
               startTime = parser.longValue();
             } else if ("end_time".equals(currentFieldName)) {
               endTime = parser.longValue();
             } else if ("total_shards".equals(currentFieldName)) {
               totalShard = parser.intValue();
             } else if ("successful_shards".equals(currentFieldName)) {
               successfulShards = parser.intValue();
             } else if ("version_id".equals(currentFieldName)) {
               version = Version.fromId(parser.intValue());
             }
           } else if (token == XContentParser.Token.START_ARRAY) {
             if ("indices".equals(currentFieldName)) {
               ArrayList<String> indicesArray = new ArrayList<>();
               while (parser.nextToken() != XContentParser.Token.END_ARRAY) {
                 indicesArray.add(parser.text());
               }
               indices = Collections.unmodifiableList(indicesArray);
             } else if ("failures".equals(currentFieldName)) {
               ArrayList<SnapshotShardFailure> shardFailureArrayList = new ArrayList<>();
               while (parser.nextToken() != XContentParser.Token.END_ARRAY) {
                 shardFailureArrayList.add(SnapshotShardFailure.fromXContent(parser));
               }
               shardFailures = Collections.unmodifiableList(shardFailureArrayList);
             } else {
               // It was probably created by newer version - ignoring
               parser.skipChildren();
             }
           } else if (token == XContentParser.Token.START_OBJECT) {
             // It was probably created by newer version - ignoring
             parser.skipChildren();
           }
         }
       }
     }
   } else {
     throw new ElasticsearchParseException("unexpected token  [" + token + "]");
   }
   return new Snapshot(
       name,
       indices,
       state,
       reason,
       version,
       startTime,
       endTime,
       totalShard,
       successfulShards,
       shardFailures);
 }