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THE UNIVERSITY OF SYDNEY

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________________________________
From: CCP4 bulletin board <[email protected]> on behalf of Demetres D. 
Leonidas <[email protected]>
Sent: Tuesday, November 29, 2022 6:34:49 PM
To: [email protected] <[email protected]>
Subject: Re: [ccp4bb] xds crashes

Dear Kay,

after some digging and help from Max Nanao we found that the problem
was the memory.  It was fulling rapidly. The workaround was to:

1. unzip the cbf files prior to processing

2. use maximum number of jobs 1

3. use number of processors 4

4. run xds_par

Many thanks for all your help

Demetres

On 11/29/2022 9:03 AM, Kay Diederichs wrote:
> Dear Demetres,
>
> I agree with what James says: this is the operating system trying to to 
> prevent, in an over-zealous way, the
> forking of too many or too big (in terms of memory) processes.
> In other words, XDS hasn't changed, but the operating system changed - it 
> applies different limits to its processes.
> Your friendly system administrator should try to find out exactly which 
> limit(s) changed, and reset the value(s).
> Perhaps a hint is in the Release Notes of Ubuntu 22.04 ?
>
> Pls report here when you've found it - currently you are the only one 
> reporting it.
>
> Best wishes,
> Kay
>
>
> On Mon, 28 Nov 2022 12:06:43 -0800, James Holton <[email protected]> wrote:
>
>> Sounds like your kernel might think "forkxds" is creating a "fork
>> bomb".  Too many sub-processes firing off in too short a time triggers
>> this.  On one of my systems, I fixed it by editing
>> /etc/security/limits.d/20-nproc.conf so that users are allowed ~10x more
>> pids than normal.  This tends to prevent these mysterious "Killed" errors.
>>
>> HTH?
>>
>> -James Holton
>> MAD Scientist
>>
>>
>> On 11/28/2022 7:44 AM, Demetres D. Leonidas wrote:
>>> Dear all,
>>>
>>> I do not know if this is the right list and I would like to apologize
>>> if it is not.
>>>
>>> We have repeatedly experienced xds crashes in machines running ubuntu
>>> 22.04.1 with the following message repeated several times at the
>>> INTEGRATE step
>>>
>>> /usr/local/bin/forkxds: line 60:  3427 Done echo "$itask"
>>>
>>>        3428 Killed                  | $amain
>>>
>>> We are trying to process data from P13 at EMBL-Hamburg.
>>>
>>> We are running XDS version Jan 10, 2022 BUILT=20220820
>>>
>>> Any ideas ?
>>>
>>> Demetres
>>>
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--
-----------------------------------------------
Dr. Demetres D. Leonidas
Professor in Biochemistry
Department of Biochemistry & Biotechnology
University of Thessaly
Biopolis 41500 Larissa, Greece
---------------------------------------------
Tel. +302410 565278
Tel. +302410 565297 (Lab)
Tel. +304210 565263 (X-ray)
Fax. +302410 565290
E-mail: [email protected]
ORCID ID orcid.org/0000-0002-3874-2523
-----------------------------------------------


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