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From "Siegfried Goeschl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (EXEC-62) PumpStreamHandler hangs if process is terminated by timeout and it has not generated stdout / stderr output
Date Wed, 06 Jan 2016 19:49:39 GMT

    [ https://issues.apache.org/jira/browse/EXEC-62?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15086164#comment-15086164
] 

Siegfried Goeschl commented on EXEC-62:
---------------------------------------

The joy of milt-platform support - the problem under Ubuntu

* the process is indeed killed by the watchdog
* the StreamPumper is blocked reading from the child process streams and never returns
* therefore the the worker threads are not terminated (since the are still in InputStream.read())
* the Thread.join will never succeed 

Some thoughts along the line

* Some other bug report indicates that the problem is caused by no process output but adding
an echo statement does not help either
* I tried interrupting the StreamPumper threads but this does not work (see http://bugs.java.com/bugdatabase/view_bug.do?bug_id=4514257)

> PumpStreamHandler hangs if process is terminated by timeout and it has not generated
stdout / stderr output
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: EXEC-62
>                 URL: https://issues.apache.org/jira/browse/EXEC-62
>             Project: Commons Exec
>          Issue Type: Bug
>    Affects Versions: 1.1
>         Environment: Ubuntu 11.04, 
> $ java -version
> java version "1.6.0_29"
> Java(TM) SE Runtime Environment (build 1.6.0_29-b11)
> Java HotSpot(TM) Server VM (build 20.4-b02, mixed mode)
>            Reporter: Ignat Zapolsky
>            Assignee: Siegfried Goeschl
>         Attachments: sample.tar.gz
>
>
> Hi,
> I've found an issue with DefaultExecutor hanging while waiting for PumpStreamHandler
to close all subprocess streams if child process was terminated by watchdog (e.g. on timeout).
> I've created a test case for the issue demonstrating working behaviour & issue.
> Test requires commons-io 1.4, Junit 4.x and commons-exec 1.1 to compile



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