Re: Manage a ROOT file from a streaming of the ROOT file content

From: Massimiliano Fasi <Massimiliano.Fasi_at_pg.infn.it>
Date: Sat, 21 Apr 2012 09:08:37 +0200

Dear all,

we tried to use hdfs plugin with a very simple ROOT code (attached), but we get the issue described below.

We succesfully created a TFile pointer, with a statement like:

TFile* fileInput = new
TFile("hdfs://hydra1:54310/user/mySearchTreeFile.root");

and a TTree pointer with:

TTree* myTree= (TTree *)fileInput->Get("data2");

but when we call any method on myTree, as

myTree->Print();

we get that error at runtime:

Error in <TFile::TFile>: file user/mySearchTreeFile.root does not exist

• Break *** segmentation violation [ stack trace follows ]

We don't understand why we don't get any error when we create the object, and what causes such kind of issue. Have you got any idea about?

Thanks,

Massimiliano

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Received on Sat Apr 21 2012 - 09:08:54 CEST