[Condor-users] Shadow exceptions on Window Machines

["Dodge, Richard" <rdodge@xxxxxxx>]

What are shadow exceptions and what can I do to avoid them?

When submitting jobs to Windows XP machines, I repeatedly get "shadow
exceptions" which cause the job to rerun itself, never giving any
results.  This seems to occur on jobs with run length of at least 8
hours.  Shorter running jobs on these same machines run fine.  When
running jobs on Linux machines, jobs that run > 48 hours never have
"shadow exceptions".

Here is a typical job.log from a job having "shadow exception" problem:


000 (3387.000.000) 03/23 15:37:59 Job submitted from host:
<172.16.230.242:32775>
...
001 (3387.000.000) 03/23 17:20:35 Job executing on host:
<172.16.204.38:1047>
...
006 (3387.000.000) 03/23 17:20:43 Image size of job updated: 65836
...
006 (3387.000.000) 03/23 17:40:46 Image size of job updated: 252316
...
007 (3387.000.000) 03/24 03:13:43 Shadow exception!
	Can no longer talk to condor_starter on execute machine
(172.16.204.38)
	0  -  Run Bytes Sent By Job
	6627422  -  Run Bytes Received By Job
...
001 (3387.000.000) 03/24 03:13:47 Job executing on host:
<172.16.204.38:1047>
...
006 (3387.000.000) 03/24 03:33:55 Image size of job updated: 252316
...
004 (3387.000.000) 03/24 07:33:32 Job was evicted.
	(0) Job was not checkpointed.
		Usr 0 04:17:51, Sys 0 00:00:00  -  Run Remote Usage
		Usr 0 00:00:00, Sys 0 00:00:00  -  Run Local Usage
	0  -  Run Bytes Sent By Job
	6627422  -  Run Bytes Received By Job
...
009 (3387.000.000) 03/24 07:33:32 Job was aborted by the user.
	via condor_rm (by user psmd)
...

Thanks,

Richard Dodge


-----Original Message-----
From: condor-users-bounces@xxxxxxxxxxx
[mailto:condor-users-bounces@xxxxxxxxxxx] On Behalf Of Colin Gillespie
Sent: Monday, February 14, 2005 4:33 AM
To: Condor-Users Mail List
Subject: [Condor-users] Shadow exceptions


Dear All,

My simple dag gave off the error code 7, I know that this is a shadow
exception, but what does this mean? The program seemed to finish
correctly.

Also I have a post-dag that monitors the signals. Basically if an error
occurs then an error is placed in a database. But in this case the job
did finish correctly, what's the best procedure for error monitoring? 

Thanks

Colin

condor_script2381Dag.dag.dagman.out 
<snip>
2/12 10:47:42 Event: ULOG_JOB_TERMINATED for Condor Job
condor_script2381 (5441.0)
2/12 10:47:42 Job condor_script2381 failed with signal 7.
2/12 10:47:42 Running POST script of Job condor_script2381...
2/12 10:47:42 Of 1 nodes total:
2/12 10:47:42  Done     Pre   Queued    Post   Ready   Un-Ready   Failed
2/12 10:47:42   ===     ===      ===     ===     ===        ===      ===
2/12 10:47:42     0       0        0       1       0          0        0
2/12 10:47:47 Event: ULOG_POST_SCRIPT_TERMINATED for Condor Job
condor_script2381 (5441.0)
2/12 10:47:47 POST Script of Job condor_script2381 completed
successfully.
2/12 10:47:47 Of 1 nodes total:
2/12 10:47:47  Done     Pre   Queued    Post   Ready   Un-Ready   Failed
2/12 10:47:47   ===     ===      ===     ===     ===        ===      ===
2/12 10:47:47     1       0        0       0       0          0        0
2/12 10:47:47 All jobs Completed!
2/12 10:47:47 **** condor_scheduniv_exec.5440.0 (condor_DAGMAN) EXITING
WITH STATUS 0


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