error : can't start new thread

Hi,

Is this within a scan or something?
Otherwise, it means that you have very strict limitation on the number of thread that you can run on that machine. But such hard restriction sounds weird and the only reason I can see why a sys admin will put such hard restriction would be via SLURM( or any scheduller) if you request a single core/task (and even in that case).

If that's the case, you should ask to run MG5aMC in a single core setup (since you ask for that to your scheduller). Otherwise you can also try to reduce the option nb_core to reduce the number of thread use.
(You curently have it to 24)

Cheers,

Olivier

If not, can you monitor the number

> On 28 Sep 2018, at 12:02, Ilirjan Margjeka <email address hidden> wrote:
>
> New question #674474 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/674474
>
> Hi there,
>
> I have a problem with the "launch" execution:
>
> Command "launch gg_HH_prova1/" interrupted with error:
> error : can't start new thread
> Please report this bug on https://bugs.launchpad.net/mg5amcnlo
> More information is found in 'MG5_debug'.
> Please attach this file to your report.
>
> ************************************************************
> #* MadGraph5_aMC@NLO *
> #* *
> #* * * *
> #* * * * * *
> #* * * * * 5 * * * * *
> #* * * * * *
> #* * * *
> #* *
> #* *
> #* VERSION 2.6.1 2017-12-12 *
> #* *
> #* The MadGraph5_aMC@NLO Development Team - Find us at *
> #* https://server06.fynu.ucl.ac.be/projects/madgraph *
> #* *
> #************************************************************
> #* *
> #* Command File for MadGraph5_aMC@NLO *
> #* *
> #* run as ./bin/mg5_aMC filename *
> #* *
> #************************************************************
> set group_subprocesses Auto
> set ignore_six_quark_processes False
> set loop_optimized_output True
> set loop_color_flows False
> set gauge unitary
> set complex_mass_scheme False
> set max_npoint_for_channel 0
> import model sm
> define p = g u c d s u~ c~ d~ s~
> define j = g u c d s u~ c~ d~ s~
> define l+ = e+ mu+
> define l- = e- mu-
> define vl = ve vm vt
> define vl~ = ve~ vm~ vt~
> import model /lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/models/BSM_gg_hh
> generate p p > h h
> output gg_HH_prova1
> launch gg_HH_prova1/
> Traceback (most recent call last):
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/extended_cmd.py", line 1467, in onecmd
> return self.onecmd_orig(line, **opt)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/extended_cmd.py", line 1421, in onecmd_orig
> return func(arg, **opt)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/master_interface.py", line 488, in do_launch
> return self.cmd.do_launch(self, line, *argss, **opts)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/madgraph_interface.py", line 6845, in do_launch
> ext_program.run()
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/launch_ext_program.py", line 65, in run
> self.launch_program()
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/launch_ext_program.py", line 620, in launch_program
> usecmd = ME.MadEventCmdShell(me_dir=self.running_dir, options=self.options)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/madevent_interface.py", line 2106, in __init__
> CmdExtended.__init__(self, me_dir, options, *completekey, **stdin)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/madevent_interface.py", line 207, in __init__
> super(CmdExtended, self).__init__(me_dir, options, *arg, **opt)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/common_run_interface.py", line 653, in __init__
> self.set_configuration()
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/madevent_interface.py", line 2146, in set_configuration
> final=final, **opt)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/common_run_interface.py", line 3337, in set_configuration
> return self.set_configuration(config_path=me5_config, final=final,initdir=self.me_dir)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/madevent_interface.py", line 2146, in set_configuration
> final=final, **opt)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/common_run_interface.py", line 3419, in set_configuration
> self.configure_run_mode(self.options['run_mode'])
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/interface/common_run_interface.py", line 3109, in configure_run_mode
> self.cluster = cluster.MultiCore(**self.options)
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/various/cluster.py", line 610, in __init__
> self.start_demon()
> File "/lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/madgraph/various/cluster.py", line 617, in start_demon
> t.start()
> File "/cvmfs/cms.cern.ch/slc6_amd64_gcc530/external/python/2.7.11-ikhhed2/lib/python2.7/threading.py", line 736, in start
> _start_new_thread(self.__bootstrap, ())
> error: can't start new thread
> MadGraph5_aMC@NLO Options
> ----------------
> complex_mass_scheme : False
> gauge : unitary
> group_subprocesses : Auto
> ignore_six_quark_processes : False
> loop_color_flows : False
> loop_optimized_output : True
> low_mem_multicore_nlo_generation : False
> max_npoint_for_channel : 0 (user set)
> stdout_level : 20 (user set)
>
> MadEvent Options
> ----------------
> automatic_html_opening : True
> nb_core : 24 (user set)
> notification_center : True
> run_mode : 2
>
> Configuration Options
> ---------------------
> OLP : MadLoop
> amcfast : amcfast-config
> applgrid : applgrid-config
> auto_update : 7 (user set)
> cluster_local_path : None
> cluster_nb_retry : 1
> cluster_queue : None (user set)
> cluster_retry_wait : 300
> cluster_size : 100
> cluster_status_update : (600, 30)
> cluster_temp_path : None
> cluster_type : condor
> collier : ./HEPTools/lib
> cpp_compiler : None
> crash_on_error : False
> delphes_path : None (user set)
> eps_viewer : None
> exrootanalysis_path : /lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/ExRootAnalysis (user set)
> f2py_compiler : None
> fastjet : None (user set)
> fortran_compiler : None
> golem : None (user set)
> hepmc_path : None (user set)
> hwpp_path : None (user set)
> lhapdf : /lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/HEPTools/lhapdf6/bin/lhapdf-config (user set)
> madanalysis5_path : None (user set)
> madanalysis_path : None (user set)
> mg5amc_py8_interface_path : /lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/HEPTools/MG5aMC_PY8_interface (user set)
> ninja : ./HEPTools/lib
> output_dependencies : external
> pjfry : None (user set)
> pythia-pgs_path : /lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/pythia-pgs (user set)
> pythia8_path : /lustrehome/imargjek/CMSSW_8_0_2/src/MG5_aMC_v2_6_1/HEPTools/pythia8 (user set)
> samurai : None
> syscalc_path : None (user set)
> td_path : None (user set)
> text_editor : None
> thepeg_path : None (user set)
> timeout : 60
> web_browser : None
>
> How do I solve this?
>
> Thank you a lot!
> Cheers!
>
> --
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