#vulnerable code 
                                public static void main(String[] args) {
        VerificationTool tool = new VerificationTool();
        JCommander.newBuilder()
                .addObject(tool)
                .build()
                .parse(args);
        System.out.println(tool.metaQuorum);
        LogServiceClient client = new LogServiceClient(tool.metaQuorum);
        ExecutorService executor = Executors.newCachedThreadPool();
        List<Future<?>> futures = new ArrayList<Future<?>>(tool.numLogs);
        for (int i = 0; i < tool.numLogs; i++) {
            BulkWriter writer = new BulkWriter(LOG_NAME_PREFIX + i, client, tool.numRecords);
            futures.add(executor.submit(writer));
        }
        waitForCompletion(futures);
        futures = new ArrayList<Future<?>>(tool.numLogs);
        for (int i = 0; i < tool.numLogs; i++) {
            BulkReader reader = new BulkReader(LOG_NAME_PREFIX + i, client, tool.numRecords);
            futures.add(executor.submit(reader));
        }
        waitForCompletion(futures);
        executor.shutdownNow();
    } 
                            #location 15 
                            #vulnerability type RESOURCE_LEAK
#fixed code
                                public static void main(String[] args) throws IOException {
        VerificationTool tool = new VerificationTool();
        JCommander jc = JCommander.newBuilder()
                .addObject(tool)
                .build();
        
        jc.parse(args);
        if (tool.help) {
          jc.usage();
          return;
        }
        System.out.println(tool.metaQuorum);
        LogServiceClient client = new LogServiceClient(tool.metaQuorum);
        ExecutorService executor = Executors.newCachedThreadPool();
        List<Future<?>> futures = new ArrayList<Future<?>>(tool.numLogs);

        if (tool.write) {
          LOG.info("Executing parallel writes");
          // Delete any logs that already exist first
          final Set<LogName> logsInSystem = new HashSet<>();
          List<LogInfo> listOfLogs = client.listLogs();
          for (LogInfo logInfo : listOfLogs) {
            logsInSystem.add(logInfo.getLogName());
          }

          LOG.info("Observed logs already in system: {}", logsInSystem);
          for (int i = 0; i < tool.numLogs; i++) {
              LogName logName = getLogName(i);
              if (logsInSystem.contains(logName)) {
                LOG.info("Deleting {}", logName);
                client.deleteLog(logName);
              }
              BulkWriter writer = new BulkWriter(getLogName(i), client, tool.numRecords, tool.logFrequency);
              futures.add(executor.submit(writer));
          }
          waitForCompletion(futures);
        }

        if (tool.read) {
          LOG.info("Executing parallel reads");
          futures = new ArrayList<Future<?>>(tool.numLogs);
          for (int i = 0; i < tool.numLogs; i++) {
              BulkReader reader = new BulkReader(getLogName(i), client, tool.numRecords, tool.logFrequency);
              futures.add(executor.submit(reader));
          }
          waitForCompletion(futures);
        }
        executor.shutdownNow();
    }