执行STAX文件时将日志消息转储到控制台

我有一个XML文件(STAX),我从命令行执行它

[root@local ~]# staf local STAX EXECUTE FILE "/root/test2.xml" 
ARGS "{'command':'ls'}" WAIT RETURNRESULT

并获得以下输出。。

Response
--------
{
  Job ID         : 57
  Start Date-Time: 20130405-18:27:13
  End Date-Time  : 20130405-18:27:13
  Status         : Normal
  Result         : 0
  Job Log Errors : []
  Testcase Totals: {
    Tests : 0
    Passes: 0
    Fails : 0
  }
}

编写脚本内容。。

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE stax SYSTEM "stax.dtd">
<stax>
<defaultcall function="runCommand"/>

<function name="runCommand">
    <function-list-args>
            <function-required-arg name="command"/>
    </function-list-args>

    <try>
           <sequence>

            <script>print("This");</script>
            <message>'%s  %s:  is a:  %s' % (STAXCurrentTestcase, STAXCurrentFunction, command)</message>
            <log>'test'</log>

            <return>0</return>
        </sequence>

        <catch exception="'eTerminateFunction'" var="eInfo">
            <sequence>
                    <log level="'fail'">'%s  %s:  Terminating function   Error: %s' % (STAXCurrentTestcase, STAXCurrentFunction, eInfo)</log>
                    <tcstatus result="'fail'">eInfo</tcstatus>
                    <return>1</return>
            </sequence>
        </catch>
    </try>
</function>
</stax>

为什么在执行过程中或执行后都不会将日志转储到控制台?
对于 <log> , <message> 或者蟒蛇 <script>print("This")</script>