[Swift-devel] interpreting swift error message

[Michael Wilde]

There is something strange going on in your test which we need to diagnose.

In your example, the app ("java") should be writing something to stdout.

So its hard to see how swift could produce the error you show. We'll need to look into and and will need all the files you used, in addition to what Ketan asked for.

I tried two tests to see whats happening. In my first test, I had a simple shell app that, like your java example, expected something on stdout.  I tested with a app() that did nothing on stdout. It yielded an empty file, as I would expect it to (not an error).

I also tried to do what it looks like you are trying, but just using shell commands. That also worked as expected, and is below.  So something is odd somewhere in your test, either a swift bug or something subtle in the calling of java.

Here's my working "max temp" example:

$ cat max.swift
type file;

app (file o) maxT(file i)
{
  sh "-c" @strcat("sort -nr ", @filename(i), " | head -1") stdout=@filename(o);
}

file maxtemp<"maxtemp.txt">;
file intemps<"temperatures.data">;

maxtemp = maxT(intemps);
$ cat tc.sh
localhost sh /bin/sh null null null
$ cat temperatures.data 
98.6
101.2
97.1
104.4
32.0
212.1
$ rm maxtemp.txt 
$ swift -tc.file tc.sh max.swift
Swift 0.94 swift-r6362 cog-r3637

RunID: 20130311-1926-9mre8yxg
Progress:  time: Mon, 11 Mar 2013 19:26:34 +0000
Final status: Mon, 11 Mar 2013 19:26:35 +0000  Finished successfully:1
$ cat maxtemp.txt 
212.1
$ 



----- Original Message -----
> From: "Ketan Maheshwari" <ketancmaheshwari at gmail.com>
> To: "Eric Skogen" <eskogen at g.clemson.edu>
> Cc: "Swift Devel" <swift-devel at ci.uchicago.edu>
> Sent: Monday, March 11, 2013 1:56:57 PM
> Subject: Re: [Swift-devel] interpreting swift error message
> 
> 
> 
> Eric,
> 
> 
> I think the message does not mean the file was not found by Swift. It
> means something failed in the application and it was not able to
> produce the output file out.txt.
> 
> 
> The file not found appears as part of the stage out routine which
> expects that file to be present after Swift completes execution.
> 
> 
> Could you post your sites.xml and tc files.
> 
> 
> Thanks,
> Ketan
> 
> 
> 
> On Mon, Mar 11, 2013 at 1:17 PM, Eric Skogen < eskogen at g.clemson.edu
> > wrote:
> 
> 
> The below code gave me an error message from swift telling me my
> output file didn't exist. As I understand my code, the file
> shouldn't need to exist. Can someone explain what happened?
> 
> code:
> type messagefile;
> 
> app (messagefile o) max(messagefile i) {
> java "MaxTemperature" @filename(i) stdout=@filename(o);
> }
> messagefile input <"1901">;
> messagefile out <"out.txt">;
> out = max(input);
> 
> Error
> RunID: 20130311-1410-5i605r58
> Progress: time: Mon, 11 Mar 2013 14:10:39 -0400
> Progress: time: Mon, 11 Mar 2013 14:10:42 -0400 Stage in:1
> Execution failed:
> File not found:
> /var/tmp/example2.2-20130311-1410-5i605r58/shared/out.txt
> 
> 
> I'm writing this code as an example so although I'm very interested
> in how to make this work, I'm more interest in how to figure out the
> problem based on the error message. Thank you for your time.
> 
> _______________________________________________
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> Swift-devel at ci.uchicago.edu
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> 
> 
> 
> 
> 
> --
> Ketan
> 
> 
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