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PROOF TChain weighting Bug?


#1

Dear fellow ROOTers,

when I tried porting a plotting script to PROOF I found a problem with weighted TChains - TChain.Draw() does not seem to care for the weight when PROOF is enabled.

I attached you a little example that should produce two plots - out-1.pdf (correct, without proof) and out-2.pdf (faulty, using PROOF). I tested this using ROOT version 5.26).

Suggestions how to resolve it, or if it is a genuine bug would be most welcome.

Thank You,
Cheers,
Gregor

test_tchain.py (1.15 KB)


#2

Hi,

Yes, it is a genuine bug. I should have just fix it in the trunk and 5-28-00-patches.
But we are not fixing anymore older versions.
If you compiled your own binaries I can provide a patch. Let me know.
Thanks for reporting and sorry for the inconvenience.

G. Ganis


#3

Hello,

thanks for the information! I will switch to the newer version.

Cheers,
Gregor