Inf/NaN propagated to the pad. Check drawn objects

[Soumyadip]

Hi,

I have a ntuple (NanoAOD type) of 5 M events. From that using a macro, I am creating some histograms. The macro runs without error. But when I open the histogram from the output file it shows the below error.

(TBrowser &) Name: Browser Title: ROOT Object Browser
root [1] (TFile *) 0x557617909000
Warning in <TCanvas::ResizePad>: Inf/NaN propagated to the pad. Check drawn objects.
Warning in <TCanvas::ResizePad>: Canvas_1 height changed from 0 to 10

Warning in <TCanvas::ResizePad>: Inf/NaN propagated to the pad. Check drawn objects.
Warning in <TCanvas::ResizePad>: Canvas_1 height changed from 0 to 10

The plot is attached , how actually it looks after opening the file. I am also attaching the macro.
Also, I have noticed that when I run the macro for 10000 events it works fine. The ntuple also can be opened using bare root. Please suggest something that can solve the problem.

ZJets.C (11.2 KB)

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_ROOT Version: 5.34 & 6.22

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Thanks & Regards,
Soumyadip

[couet]

Your data file is missing:

Processing ZJets.C...
Error in <TFile::TFile>: file sample.root does not exist

[Soumyadip]

I have placed the sample and the macro in my lxplus public.
This is the path : /afs/cern.ch/work/s/sobarman/public

[Wile_E_Coyote]

You use “UInt_t” variables to keep the variable sizes of some arrays.
@pcanal There is / was a requirement that leaves keeping such sizes must be “Int_t” (i.e., “32 bit signed integers”).
However, it is also possible that accessing such trees via a TTreeReader based interface would be free from this “limitation” (but see also this old post).

[Soumyadip]

After changing UInt_t to Int_t, I am getting this error :

Error in <TTree::SetBranchAddress>: The pointer type given "Int_t" (3) does not correspond to the type needed "UInt_t" (13) by the branch: nGenPart
Error in <TTree::SetBranchAddress>: The pointer type given "Int_t" (3) does not correspond to the type needed "UInt_t" (13) by the branch: nGenJet
Error in <TTree::SetBranchAddress>: The pointer type given "Int_t" (3) does not correspond to the type needed "UInt_t" (13) by the branch: nGenDressedLepton
No. of events processed : 1

 *** Break *** segmentation violation



===========================================================
There was a crash.
This is the entire stack trace of all threads:
===========================================================
    gdb.printing.register_pretty_printer(gdb.current_objfile(),
    gdb.printing.register_pretty_printer(gdb.current_objfile(),
#0  0x00007f71acc3f46c in waitpid () from /lib64/libc.so.6
#1  0x00007f71acbbcf62 in do_system () from /lib64/libc.so.6
#2  0x00007f71ad720e8c in TUnixSystem::StackTrace() () from /usr/lib64/root/libCore.so.6.22
#3  0x00007f71ad72391a in TUnixSystem::DispatchSignals(ESignals) () from /usr/lib64/root/libCore.so.6.22
#4  <signal handler called>
#5  0x00007f71adde22b5 in ?? ()
#6  0x0000000000000000 in ?? ()
===========================================================


The lines below might hint at the cause of the crash.
You may get help by asking at the ROOT forum https://root.cern.ch/forum
Only if you are really convinced it is a bug in ROOT then please submit a
report at https://root.cern.ch/bugs Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
#5  0x00007f71adde22b5 in ?? ()
#6  0x0000000000000000 in ?? ()
===========================================================


Root >

[Wile_E_Coyote]

You would need to recreate your tree from scratch.

[Soumyadip]

Do you mean the sample ? Then I guess it is not possible. The sample has been produced from a specific script and it automatically assigns which one will be treated as UInt_t or Int_t. If I reproduce the sample again it will be automatically assigned that particular branch as UInt_t again.

[Soumyadip]

Hi,

I have modified the code to use TTreeReader but unfortunately, I am getting the same error.
The modified code is attached : ZJets_Analyzer.C (8.4 KB)

@pcanal I am not much comfortable with TTreeReader. Please suggest, if I have done anything terrible in the code or the problem is of a different source.

[Wile_E_Coyote]

Try with ROOT 5 or ROOT 6:

if (!TMath::Finite(*genWeight)) {
  std::cout << "Entry = " << myReader.GetCurrentEntry() << " *genWeight = " << *genWeight << std::endl;
  continue;
}
if (!TMath::Finite(sum_pt)) {
  std::cout << "Entry = " << myReader.GetCurrentEntry() << " sum_pt = " << sum_pt << std::endl;
} else {
  h_sumpt->Fill(sum_pt, *genWeight);
}

or with ROOT 6:

#include <cmath>
// ...
if (!std::isfinite(*genWeight)) {
  std::cout << "Entry = " << myReader.GetCurrentEntry() << " *genWeight = " << *genWeight << std::endl;
  continue;
}
if (!std::isfinite(sum_pt)) {
  std::cout << "Entry = " << myReader.GetCurrentEntry() << " sum_pt = " << sum_pt << std::endl;
} else {
  h_sumpt->Fill(sum_pt, *genWeight);
}

[Soumyadip]

Thanks, it solves the problem.
The problem was in the genWeight branch. It has NaN/Inf values which are causing the problem.