cmdValue, timeoutValue, args);
// debug
// System.out.println("command output:\n" + externalCmd.getStringOutput());
int exitValue = externalCmd.exitValue();
_logger.info("Executed command: " + cmd + ", exitValue: " + exitValue);
// if exit-value != 0, transition fails
if (exitValue != 0) {
throw new Exception("fail to execute command: " + cmd + ", exitValue: " + exitValue