* https://github.com/google/guava/issues/6634: ProcessHandle has more accurate information,
       * but that class isn't available under all environments that we support. We use it if
       * available and fall back if not.
       */
      String fromSystemProperty = requireNonNull(USER_NAME.value());

      try {
        Class<?> processHandleClass = Class.forName("java.lang.ProcessHandle");

            @Override
            public String getSchedulerTargetName() {
                return "";
            }
        });
        final String hostname = systemHelper.getHostname();
        final long pid = ProcessHandle.current().pid();
        assertEquals(hostname + ":" + pid, systemHelper.getInstanceId());
    }

    @Test
    public void test_getInstanceId_withTargetName() {

          println("TLSv1.3 requires an external command run before first traffic is sent")
          println("Follow instructions at https://github.com/neykov/extract-tls-secrets for TLSv1.3")
          println("Pid: ${ProcessHandle.current().pid()}")

          Thread.sleep(10000)
        }
      }

      CommandLine -> {
        return ProcessBuilder(
          "tshark",
          "-l",
          "-V",
          "-o",

    private static final Pattern UNIX_PID_PATTERN = Pattern.compile("([0-9]+)");
    private static final Pattern WINDOWS_PID_PATTERN = Pattern.compile("([0-9]+)\\s*$");
    private static final String MY_PID = String.valueOf(ProcessHandle.current().pid());
    private static final String JAVA_EXECUTABLE_PATTERN_STR = "java(?:\\.exe)?";
    private static final String GRADLE_MAIN_CLASS_PATTERN_STR = "(org\\.gradle\\.[a-zA-Z]+)";

            writer.accept(CLIReportingUtils.showVersionMinimal());
        } else if (context.invokerRequest.effectiveVerbose()) {
            writer.accept(CLIReportingUtils.showVersion(
                    ProcessHandle.current().info().commandLine().orElse(null), describe(context.terminal)));

        } else {
            writer.accept(CLIReportingUtils.showVersion());
        }
    }

     */
    public String getInstanceId() {
        final String targetName = ComponentUtil.getFessConfig().getSchedulerTargetName();
        final String hostname = getHostname();
        final long pid = ProcessHandle.current().pid();
        if (StringUtil.isNotBlank(targetName)) {
            return targetName + "@" + hostname + ":" + pid;
        }
        return hostname + ":" + pid;
    }

    /**