Problem with simultaneously starting Multicore CPU tasks has not been fixed yet!

Problem with simultaneously starting Multicore CPU tasks has not been fixed yet!

I have heard about this error but maybe I don't understand the symptoms. I have had three 4 thread WUs start at once and sometimes they work, sometimes they don't. Could this be the cause of my errors? Linked below are the tasks from the system:

http://www.gpugrid.net/results.php?hostid=424454

If two WUs start at the same time, in most cases one of the WU failes right at start and throws an calculation error, which is very inconveniant, if you have to start often times more than one WU at the same time (in my case up to 20 WUs on my 80 threads machine). Would like to hear some statement of the developer(s) or simply a bugfix within the WUs, because at the moment, I do not see any suitable work around. Don't think it's just your fault or mine, because several users have reported this issue for a while now.

If it is still failing, please provide a task number for me to check.

@Thomas: pls try to reset the project

Toni,

Here are two task numbers that started at the same time. Both failed.

17737243
17737150

Let me know if you need more info.

EDIT:

Here is a task that started by itself and failed.

17714391

@captainjack: please try two things for me

1. open a terminal, and run the

flock

command. See if it gives an error (command not found) or a longer message.
2. reset the project

Thanks

Toni,

The "flock" command was found and asked for more arguments.

After a project reset, the following two tasks were started and both failed.

17737309
17737152

The following task was started by itself and failed.

17737252

What next?

:(

Which means that for your host the new app is a regression. I need an enlightenment.

T

Statistically though the new app seems to have worked on other hosts. We went from 900 WU to 1500 WU in progress.

with all my computers just the same... Toni, does it help if I give you by private message the remote control access credentials of one of my Linux machines, so you can test on your own?

Thomas, that would help, but perhaps let me ask another thing first:

What OS do you have, and which procedure did you use to install boinc?

(Also, I assume QM tasks were working ok before, right?)

Sometimes they work and sometimes not. If two or more WUs start at the same time, they all throw calculation errors. This was the state until now. But with the very new version you just released today, it seems like they are not working anymore at all. My operating system is Linux Mint 18.3 64 Bit with actual linux kernel. I installed boinc with "sudo apt-get install boinc". gcc-5 and g++-5 are installed; also python-support.

Ok thanks. This will need a while to debug. As you can see there is no error info to help (as usual in boinc...).

All errors on my VM (with 4 virtual core).

<message>
process exited with code 195 (0xc3, -61)
</message>
<stderr_txt>
16:29:25 (2940): wrapper (7.7.26016): starting
16:29:25 (2940): wrapper (7.7.26016): starting
16:29:25 (2940): wrapper: running /bin/bash (-c "flock /var/lib/boinc-client/projects/www.gpugrid.net/miniconda.lock ./miniconda-installer -b -u -p /var/lib/boinc-client/projects/www.gpugrid.net/miniconda")
Please run using "bash" or "sh", but not "." or "source"\n16:29:26 (2940): /bin/bash exited; CPU time 0.000000
16:29:26 (2940): app exit status: 0x1

I have not app_config.

Addendum: i also tried to stop all wus and started manually one-by-one. Same error.

Version 320 out

Also, you need the libc6-dev package

sudo apt install libc6-dev

All tasks exit with error:

14:19:18 (8806): wrapper: running /bin/bash (-c "flock /var/lib/boinc-client/projects/www.gpugrid.net/miniconda.lock ./miniconda-installer -b -u -p /var/lib/boinc-client/projects/www.gpugrid.net/miniconda")
Please run using "bash" or "sh", but not "." or "source"\n14:19:19 (8806): /bin/bash exited; CPU time 0.001596
14:19:19 (8806): app exit status: 0x1

These were 3.19. See with 3.20

When I tried to start two at the same time, one of them runs okay and the other one aborts.

Task id for the aborted work unit is 17714759
Work unit number for the aborted work unit is 13679491

Running version 3.20

Let me know if you need more info.

I have had libc6-dev already installed... Earlier I got a bunch of new WUs, but all failed after several minutes of calculation (~ 5 - 15 minutes).