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XROOTD-L  September 2019

XROOTD-L September 2019

Subject:

Re: python :: segfault in copyprocess.py

From:

Michal Kamil Simon <[log in to unmask]>

Reply-To:

Support use of xrootd by HEP experiments <[log in to unmask]>

Date:

Mon, 30 Sep 2019 07:58:23 +0000

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (126 lines)

Hi Adrian,

Thanks a lot, I got it! Fixed in:
https://github.com/xrootd/xrootd/commit/d37ff87602093ad012e362d95bdc89befea06743

Cheers,
Michal
________________________________________
From: Adrian Sevcenco
Sent: 27 September 2019 16:49
To: Michal Kamil Simon; xrootd-l
Subject: Re: python :: segfault in copyprocess.py

On 9/27/19 5:07 PM, Michal Kamil Simon wrote:
> Hi Adrian,
Hi!

> Sorry for the delay, which version (or commit) of xrootd is this?
no problem, this is 06425944

Thanks!!
Adrian


>
> Thanks,
> Michal
> ________________________________________
> From: Adrian Sevcenco
> Sent: 25 September 2019 23:55
> To: Michal Kamil Simon; xrootd-l
> Subject: Re: python :: segfault in copyprocess.py
>
> On 9/25/19 6:30 PM, Michal Kamil Simon wrote:
>> Hi Adrian,
> Hi!
>
>> I don't think the segv is due to the fact you haven't added any jobs,
>> at least I cannot reproduce it.
>>
>> Could you provide a small reproducer and/or a backtrace from your
> i managed to have this:
> https://cernbox.cern.ch/index.php/s/2G6qByVkoZhp5TC
>
> i hope it is enough... if you need more, could you tell me how can debug
> further? maybe a gdb command file?
>
> Thank you!!
> Adrian
>
>
>> coredump?
>>
>> Cheers,
>> Michal
>> ________________________________________
>> From: Adrian Sevcenco
>> Sent: 25 September 2019 09:39
>> To: Michal Kamil Simon; xrootd-l
>> Subject: python :: segfault in copyprocess.py
>>
>> Hi Michal! I have a strange occurrence of
>> Fatal Python error: Segmentation fault
>>
>> Thread 0x00007fbab90a4700 (most recent call first):
>>      File "/usr/lib64/python3.7/concurrent/futures/thread.py", line 78 in
>> _worker
>>      File "/usr/lib64/python3.7/threading.py", line 870 in run
>>      File "/usr/lib64/python3.7/threading.py", line 926 in _bootstrap_inner
>>      File "/usr/lib64/python3.7/threading.py", line 890 in _bootstrap
>>
>> Current thread 0x00007fbabaa25740 (most recent call first):
>>      File
>> "/home/adrian/.local/lib/python3.7/site-packages/XRootD/client/copyprocess.py",
>> line 145 in run
>>      File "/home/adrian/bin/alien.py", line 594 in XrdCopy
>>      File "/home/adrian/bin/alien.py", line 451 in ProcessXrootdCp
>>      File "/home/adrian/bin/alien.py", line 1051 in ProcessInput
>>      File "/home/adrian/bin/alien.py", line 1118 in JAlien
>>      File "/usr/lib64/python3.7/asyncio/events.py", line 88 in _run
>>      File "/usr/lib64/python3.7/asyncio/base_events.py", line 1771 in
>> _run_once
>>      File "/usr/lib64/python3.7/asyncio/base_events.py", line 534 in
>> run_forever
>>      File "/usr/lib64/python3.7/asyncio/base_events.py", line 566 in
>> run_until_complete
>>      File "/home/adrian/bin/alien.py", line 1199 in main
>>      File "/home/adrian/bin/alien.py", line 1203 in <module>
>> Segmentation fault (core dumped)
>>
>> i believe that this happens because the i do run without any job added
>> ... of course i could protect the case of no jobs added but maybe can
>> upstream check if copy jobs are in queue and if not then give a message
>> that "No copy jobs to run" or something?
>>
>> Thanks!!
>> Adrian
>>
>>
>>
>
>
> --
> ----------------------------------------------
> Adrian Sevcenco, Ph.D.                       |
> Institute of Space Science - ISS, Romania    |
> adrian.sevcenco at {cern.ch,spacescience.ro} |
> ----------------------------------------------
>
>


--
----------------------------------------------
Adrian Sevcenco, Ph.D.                       |
Institute of Space Science - ISS, Romania    |
adrian.sevcenco at {cern.ch,spacescience.ro} |
----------------------------------------------


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