Re: [HTCondor-users] How specify out/err files for a DAGMan PRE script?

[Cole Bollig <cabollig@xxxxxxxx>]

Hi Siarhei,

Unfortunately DAGMan does not have a way of specifying files to write a scripts stdout and stderr into. You would have to do something in the script to get that output currently. If your script is a bash script you can have the script redirect its stdout and stderr to a file at the beginning with something like:

#!/bin/bash

exec > /path/to/file

exec 2>&1

This will redirect both the stdout and stderr to /path/to/file. I will say that the idea of being able to specify files to have script stdout and stderr written to it is a great idea. I will look into adding that capability to DAGMan.

Cheers,

Cole Bollig

---

From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> on behalf of Vaurynovich, Siarhei <siarhei.vaurynovich@xxxxxxxxxxxxx>
Sent: Friday, July 21, 2023 7:39 AM
To: htcondor-users@xxxxxxxxxxx <htcondor-users@xxxxxxxxxxx>
Subject: [HTCondor-users] How specify out/err files for a DAGMan PRE script?

 

Hello,

 

I have a DAGMan PRE script which works fine most of the time but about once in a month it fails for unknow reason. Looking at where its STDOUT/STDERR point to I can see:

$  readlink -f /proc/4165884/fd/1

/dev/null

$  readlink -f /proc/4165884/fd/2

/dev/null

 

which makes it impossible to figure out why the PRE script fails.

 

Could you please let me know if there is a way to specify out/err files for a DAGMan PRE script to debug situations like this?

 

Thank you very much for your help,

Siarhei.

 

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