Why Task Instance Name is messed up?

Question

I kicked off a customized task from console, the task was completed successfully, however, the task instance name displayed on page "Server Tasks ---> All Task" is messed up as following
TASK7F2DB676E49A6D04:-395D12E7:11989A5891E:-7F0F
What is the possible problem?
Have a good one

Answer 1

first define some variable:
<Variable name='taskName'>
      <invoke name='getName'>
               <invoke name='getDefinitionRef'>
                      <invoke name='getTask'>
                            <ref>WF_CONTEXT</ref>
                        </invoke>
                 </invoke>
        </invoke>
  </Variable>now you call rename task workflow application:
<Activity id='3' name='Rename Task' hidden='true'>
       <Variable name='newTaskName'/>
                <Action id='0' name='set task name'>
                    <expression>
                        <set name='newTaskName'>
                            <concat>
                                <ref>taskName</ref>
                                <s> </s>
                                <ref>WF_CASE_OWNER</ref>
                                <s> (</s>
                                <invoke name='format'>
                                    <new class='java.text.SimpleDateFormat'>
                                        <s>yyyyMMdd HH:mm:ss</s>
                                    </new>
                                    <new class='java.util.Date'/>
                                </invoke>
                                <s>)</s>
                            </concat>
                        </set>
              </expression>
    </Action>
    <Action id='1' process='Rename Task'>
            <Argument name='name'>
                        <ref>newTaskName</ref>
            </Argument>
            <Argument name='makeUnique' value='true'/>
    </Action>thats it.