private void waitForWorkersStartup(WorkerJvm worker, int workerTimeoutSec) {
    int loopCount =
        (int) TimeUnit.SECONDS.toMillis(workerTimeoutSec) / WAIT_FOR_WORKER_STARTUP_INTERVAL_MILLIS;
    for (int i = 0; i < loopCount; i++) {
      if (hasExited(worker)) {
        throw new SpawnWorkerFailedException(
            format(
                "Startup of Worker on host %s failed, check log files in %s for more information!",
                agent.getPublicAddress(), worker.getWorkerHome()));
      }

      String address = readAddress(worker);
      if (address != null) {
        worker.setHzAddress(address);
        LOGGER.info(format("Worker %s started", worker.getId()));
        return;
      }

      sleepMillis(WAIT_FOR_WORKER_STARTUP_INTERVAL_MILLIS);
    }

    throw new SpawnWorkerFailedException(
        format(
            "Worker %s of Testsuite %s on Agent %s didn't start within %s seconds",
            worker.getId(),
            agent.getTestSuite().getId(),
            agent.getPublicAddress(),
            workerTimeoutSec));
  }
  private String[] buildArgs(WorkerJvm workerJvm, WorkerType type) {
    List<String> args = new LinkedList<String>();

    int workerIndex = workerJvmSettings.getWorkerIndex();
    int workerPort = agent.getPort() + workerIndex;

    addNumaCtlSettings(args);
    addProfilerSettings(workerJvm, args);

    args.add("-classpath");
    args.add(getClasspath());
    args.addAll(getJvmOptions());
    args.add("-XX:OnOutOfMemoryError=\"touch worker.oome\"");
    args.add("-Dhazelcast.logging.type=log4j");
    args.add("-Dlog4j.configuration=file:" + log4jFile.getAbsolutePath());

    args.add("-DSIMULATOR_HOME=" + getSimulatorHome());
    args.add("-DworkerId=" + workerJvm.getId());
    args.add("-DworkerType=" + type);
    args.add("-DpublicAddress=" + agent.getPublicAddress());
    args.add("-DagentIndex=" + agent.getAddressIndex());
    args.add("-DworkerIndex=" + workerIndex);
    args.add("-DworkerPort=" + workerPort);
    args.add("-DautoCreateHzInstance=" + workerJvmSettings.isAutoCreateHzInstance());
    args.add(
        "-DworkerPerformanceMonitorIntervalSeconds="
            + workerJvmSettings.getWorkerPerformanceMonitorIntervalSeconds());
    args.add("-DhzConfigFile=" + hzConfigFile.getAbsolutePath());

    // add class name to start correct worker type
    args.add(type.getClassName());

    return args.toArray(new String[args.size()]);
  }