[Bug 58376] New: On windows when using headfilter with exec, ant hangs.

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=58376

            Bug ID: 58376
           Summary: On windows when using headfilter with exec, ant hangs.
           Product: Ant
           Version: 1.9.4
          Hardware: PC
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Core tasks
          Assignee: notifications@ant.apache.org
          Reporter: daniel.friederich@freescale.com

I run some external process which occasionally prints a lot to the stdout.
In order to avoid to generate huge build output files, I wanted to limit the
output which gets generated to some maximum. However when trying this, the
executed process hangs, never terminates. 
Without the headfilter (or with the headfilter and lines="-1") the execution
terminates quickly.

  <target name="t">
    <echo message="starting cmd.exe" />
    <exec executable="cmd.exe">
    <arg value="/c"/>
      <arg value="type"/>
      <arg value="build.xml"/>
      <redirector>
        <outputfilterchain>
          <headfilter lines="-1"/>
        </outputfilterchain>
      </redirector>
    </exec>
    <echo message="bug: never get here" />
  </target>

This is on Windows 10 (not sure it matters)

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[Bug 58376] On windows when using headfilter with exec, ant hangs.

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=58376

Daniel Friederich <da...@freescale.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 OS|                            |All

--- Comment #1 from Daniel Friederich <da...@freescale.com> ---
To reproduce the bug, use 
<headfilter lines="10"/>

(and not -1, with -1 it ends quickly)

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