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  Hi Derek, Fabrizio,

  I think I found the problem. Is on the interpretation of certain 
return codes in
  TXNetFile ...

  I'm working on it.

  I should have a solution very soon.

  Cheers, Gerri
 


Fabrizio Furano wrote:

> Hi Derek,
>
>  quite ugly. Anything strange in the server or client side log?
>
> Fabrizio
>
> Derek Feichtinger wrote:
>
>> Posted by: Derek Feichtinger <dfeich>
>> Related to: [ROOT bugs #16484] Errors filling tree on a xrootd file
>> URL: <http://savannah.cern.ch/bugs/?func=detailitem&item_id=16484>
>>
>>
>> Hi,
>>
>> I see errors when filling a tree in a file that is openend via 
>> xrootd. The
>> problem gets worse, the more entries I try to fill.
>>
>> (N.B. It's not that I consider it an efficient way to work, filling a 
>> remote
>> tree, but I was toying around with a few tests for our xrootd 
>> installation)
>>
>> I attached a sample file with which I can reproduce the error.
>>
>> .L xrootdFillTree.C+
>> xrootdFillTree(5000)
>>   [No error]
>> xrootdFillTree(10000)
>> Error in <TTree::Fill>: Failed filling branch:t1.px, nbytes=-1
>> Error in <TTree::Fill>: Failed filling branch:t1.py, nbytes=-1
>> Error in <TTree::Fill>: Failed filling branch:t1.pz, nbytes=-1
>>
>> xrootdFillTree(20000)
>>   [2*above errors]
>>
>> xrootdFillTree(30000)
>>   [3*above errors]
>>
>> ROOT version: 5.11.02  (using xrootd-20060414-1334_dbg of the 
>> distribution)
>> arch:
>>     Intel(R) XEON(TM) CPU 2.20GHz
>>     and also Dual Core AMD Opteron(tm) Processor 280
>>
>> Thanks,
>> Derek
>>
>>
>> Submitted by: dfeich
>> Originator Email:
>> Bug / Feature: Bug report
>> Category: Input/Output
>> Priority: 5 - Normal
>> Severity: 3 - Normal
>> Status:
>> Assigned to:
>> Open/Closed: Open
>> Release: 5.11.02
>> Operating System: GNU/Linux
>>
>>
>> _______________________________________________
>>   Message sent via/by LCG Savannah
>>   http://savannah.cern.ch/
>>
>>
>> ------------------------------------------------------------------------
>>
>> #include "TString.h"
>> #include "TFile.h"
>> #include "TTree.h"
>> #include "TRandom.h"
>>
>> void
>> xrootdFillTree(int entries)
>> {
>>   // using a remote tree via xrootd leads to errors for entries > 
>> ~5000 in my case
>>   TString 
>> filename="root://merlin01//tmp/feichtinger/xrootd/ns/xrootdFillTree.root"; 
>>
>>  
>>   // using a local file works fine   //filename="localtest.root";
>>
>>   TFile *f = TFile::Open(filename,"recreate");
>>   if(!f) {
>>     fprintf(stderr,"failed to recreate file %s\n",filename.Data());
>>     return;
>>   }
>>
>>   TTree *t1 = new TTree("t1","TreeTest");
>>
>>   Float_t px,py,pz;
>>   t1->Branch("px",&px,"px/F");
>>   t1->Branch("py",&py,"py/F");
>>   t1->Branch("pz",&pz,"pz/F");
>>
>>   Float_t pmean=1.0;
>>   for(int i=0;i<entries;i++) {
>>     px=gRandom->Gaus(0,pmean);
>>     py=gRandom->Gaus(0,pmean);
>>     pz=gRandom->Gaus(0,pmean);
>>
>>     t1->Fill();
>>   }
>>
>>   t1->Write();
>>   //delete(t1);
>>   f->Close();
>>
>>   return;
>> }
>
>


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  Gerardo GANIS    PH Department, CERN
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