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Posted to issues@commons.apache.org by "Siegfried Goeschl (JIRA)" <ji...@apache.org> on 2010/08/12 20:05:16 UTC
[jira] Resolved: (EXEC-46) Process.waitFor should clear interrupt
status when throwing InterruptedException
[ https://issues.apache.org/jira/browse/EXEC-46?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Siegfried Goeschl resolved EXEC-46.
-----------------------------------
Fix Version/s: 1.1
Resolution: Fixed
Wrote a test but at least under Mac OS X the problem did not appear with commons-exec. Having said that I'm resetting the Interrupted flag to be on the save side.
> Process.waitFor should clear interrupt status when throwing InterruptedException
> --------------------------------------------------------------------------------
>
> Key: EXEC-46
> URL: https://issues.apache.org/jira/browse/EXEC-46
> Project: Commons Exec
> Issue Type: Improvement
> Environment: any
> Reporter: nir
> Assignee: Siegfried Goeschl
> Priority: Minor
> Fix For: 1.1
>
>
> Taken from - http://kylecartmell.com/?p=9
> By convention, methods that throw InterruptedException reset the thread interrupt flag.
> Unfortunately Process.waitFor didn't get that memo. (See Sun bug 6420270 - http://bugs.sun.com/view_bug.do?bug_id=6420270).
> This is especially entertaining when a thread invokes multiple processes consecutively and calls waitFor for each of them;
> After one call to waitFor is interrupted, future calls to waitFor from the same thread will immediately throw InterruptedException until the interrupt flag is cleared.
> Process.waitFor should always be called from a try block whether InterruptedException is caught or not, with a corresponding finally block that calls Thread.interrupted to clear the interrupt flag.
> So maybe the code in DefaultExecutor.executeInternal() method should change:
> int exitValue = Executor.INVALID_EXITVALUE;
> try {
> exitValue = process.waitFor();
> } catch (InterruptedException e) {
> process.destroy();
> }
> Maybe there is a need to add
> Thread.interrupted()
> to the catch/finally block
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