Recv failed

ROOT
1

Hi,

I’m running a TSelector analysis using some files in a TDSet and I’m getting the following message in the log file:

Jan 4 15:16:21 prod-frontend proofserv[17280]: cms:master0:Error:TPacketizer::ValidateFiles:Recv failed! for slave-0.5 (compute-0-2)
Jan 4 15:16:21 prod-frontend proofserv[17280]: cms:master0:Error:TPacketizer::ValidateFiles:Recv failed! for slave-0.7 (compute-0-3)
Jan 4 15:16:23 prod-frontend proofserv[17280]: cms:master0:Error:TPacketizer::ValidateFiles:Recv failed! for slave-0.2 (compute-0-1)
Jan 4 15:16:24 prod-frontend proofserv[17280]: cms:master0:*** Break ***:segmentation violation

and the execution doesn’t even start.

When I run the same code with just one file in the TDSet, it runs, though it seems to get stuck in the last events. However, I get the prompt back and I can access all the histograms filled.

Thanks in advance,

Antonio

2

Hi Antonio,

the data files which you analyse, do you access them via TFile (NFS),
TNetFile (rootd) or TXNetFile (xrootd)?

Could you please start the proofd’s (and rootd’s) with

proofd -d 3 -f

and send the debug output?

Maybe it’s an access/authentication problem from the proofd’s to the files.

Cheers,
Carsten.

3

Hi Antonio,

what are the file names in the TDSet? They should be root://…. so all PROOF slaves can access these files most efficiently. Have a look in the /var/log/messages files and the master and slaves to get a hint on what might be the problem (rootd authentication as Casten suggests).

Cheers, Fons.