A job with a process class assigned with an agent does not show the stdout in the log file when having a PostProcessing Monitor

This job will show the error

<job stop_on_error="no" process_class="test" name="job3">

<params >
<param name="scheduler_event_class" value="test"/>
<param name="scheduler_event_id" value="1"/>
</params>

<script language="shell">
<![CDATA[
echo job1
ping -n 10 localhost
]]>
</script>

<monitor name="create_event_monitor" ordering="99">
<script language="java" java_class_path="" java_class="com.sos.jitl.eventing.EventMonitorTaskAfter"/>
</monitor>

<run_time />
</job>

<process_classes >
<process_class max_processes="12" remote_scheduler="localhost:4211" name="test"/>
</process_classes>