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Hello I am using the xrootd door of a dcache storage (1.9.5). With xrdcp I dont have any troubles, but when using root as a client (v5.26) that requests data through xrootd protocol I get errors randomly. I reproduce the errors in root by simply creating a TChain of files and for example calling the method GetEntries(). Error in <TXNetFile::CreateXClient>: open attempt failed on root://xrootd.ifae.es//pnfs/pic.es/IFAEAtlasTier2/t2atlasscratchdisk/group10/phys-sm/mc09_7TeV/group10.phys-sm.mc09_7TeV.107653.AlpgenJimmyZeeNp3_pt20.recon.ESD.e529_s765_s767_r1302.WZphys.100612.07.D3PD/group10.phys-sm.mc09_7TeV.107653.AlpgenJimmyZeeNp3_pt20.recon.ESD.e529_s765_s767_r1302.WZphys.100612.07.D3PD.D3PD._00001.root If I turn on debugging on the client, I get more information with an error like: 100917 20:49:24 001 Xrd: CheckErrorStatus: Server [dcgftp12.ifae.es:1094] declared: OpenRequest different from the one the redirector got(error code: 3000) Has anybody already experienced this problem or can anyone help me to better understand this error message? thanks, Carlos the full log. 100917 20:49:24 001 Xrd: TakeUrl: Host: dcgftp12.ifae.es 100917 20:49:24 001 Xrd: TakeUrl: Port: 1094 100917 20:49:24 001 Xrd: GetAccessToSrv: Ok: the server on [dcgftp12.ifae.es:1094] is an xrootd redirector. 100917 20:49:24 001 Xrd: GetAccessToSrv: Reusing physical connection to server [dcgftp12.ifae.es:1094]). Open Access to server granted. Open Opening the remote file /pnfs/ifae.es/IFAEAtlasTier2/t2atlasscratchdisk/group10/phys-sm/mc09_7TeV/group10.phys-sm.mc09_7TeV.107650.AlpgenJimmyZeeNp0_pt20.recon.ESD.e529_ s765_s767_r1302.WZphys.100612.07.D3PD/group10.phys-sm.mc09_7TeV.107650.AlpgenJimmyZeeNp0_pt20.recon.ESD.e529_s765_s767_r1302.WZphys.100612.07.D3PD.D3PD._00001.root 100917 20:49:24 001 Xrd: SendGenCommand: Sending command Open 100917 20:49:24 001 Xrd: ReadPartialAnswer: Reading a XrdClientMessage from the server [dcgftp12.ifae.es:1094]... 100917 20:49:24 001 Xrd: ReadPartialAnswer: Server [dcgftp12.ifae.es:1094] answered [kXR_redirect] (4004) 100917 20:49:24 001 Xrd: Disconnect: LogConnID: 9 destroyed 100917 20:49:24 001 Xrd: HandleServerError: Redir count=1 100917 20:49:24 001 Xrd: TakeUrl: parsing url: root://dcgftp12.ifae.es:1094//pnfs/ifae.es/IFAEAtlasTier2/t2atlasscratchdisk/group10/phys-sm/mc09_7TeV/group10.phys-sm.mc09_7TeV .107650.AlpgenJimmyZeeNp0_pt20.recon.ESD.e529_s765_s767_r1302.WZphys.100612.07.D3PD/group10.phys-sm.mc09_7TeV.107650.AlpgenJimmyZeeNp0_pt20.recon.ESD.e529_s765_s767_r1302.WZ phys.100612.07.D3PD.D3PD._00001.root 100917 20:49:24 001 Xrd: TakeUrl: Proto: root 100917 20:49:24 001 Xrd: TakeUrl: HostWPort: dcgftp12.ifae.es:1094 100917 20:49:24 001 Xrd: TakeUrl: File: /pnfs/ifae.es/IFAEAtlasTier2/t2atlasscratchdisk/group10/phys-sm/mc09_7TeV/group10.phys-sm.mc09_7TeV.107650.AlpgenJimmyZeeNp0_pt20 .recon.ESD.e529_s765_s767_r1302.WZphys.100612.07.D3PD/group10.phys-sm.mc09_7TeV.107650.AlpgenJimmyZeeNp0_pt20.recon.ESD.e529_s765_s767_r1302.WZphys.100612.07.D3PD.D3PD._0000 1.root 100917 20:49:24 001 Xrd: TakeUrl: Host: dcgftp12.ifae.es 100917 20:49:24 001 Xrd: TakeUrl: Port: 1094 100917 20:49:24 001 Xrd: HandleServerError: Received redirection to [dc011:33130]. Token=[]]. Opaque=[]. 100917 20:49:24 001 Xrd: XrdClientConn: Trying to connect to 193.109.172.11:33130 100917 20:49:24 001 Xrd: Connect: Creating a logical connection... 100917 20:49:24 001 Xrd: DumpPhyConn: Phyconn entry, key='cosuna@dc011:33116', LogCnt=0 Valid 100917 20:49:24 001 Xrd: DumpPhyConn: Phyconn entry, key='cosuna@dc016:33123', LogCnt=0 Valid 100917 20:49:24 001 Xrd: DumpPhyConn: Phyconn entry, [log in to unmask]:1094', LogCnt=0 Valid 100917 20:49:24 001 Xrd: DumpPhyConn: Phyconn entry, key='cosuna@dc011:33127', LogCnt=0 Valid 100917 20:49:24 001 Xrd: DumpPhyConn: Phyconn entry, key='cosuna@dc011:33130', LogCnt=0 Valid 100917 20:49:24 001 Xrd: DumpPhyConn: Phyconn entry, [log in to unmask]:1094', LogCnt=1 Valid 100917 20:49:24 001 Xrd: DumpPhyConn: Phyconn entry, [log in to unmask]:1094', LogCnt=0 Valid 100917 20:49:24 001 Xrd: Connect: LogConn: size:11 count: 2PhyConn: size:7 100917 20:49:24 001 Xrd: Connect: Connect(dc011, 33130) returned 10 100917 20:49:24 001 Xrd: DoHandShake: The physical channel is already bound to the data server [dc011:33130]. No handshake is needed. 100917 20:49:24 001 Xrd: GetAccessToSrv: Ok, the server on [dc011:33130] is an xrootd data server. 100917 20:49:24 001 Xrd: GetAccessToSrv: Reusing physical connection to server [dc011:33130]). 100917 20:49:24 001 Xrd: SendGenCommand: Got (and maybe recovered) an error from dc011:33130 100917 20:49:24 001 Xrd: SendGenCommand: Sending command Open 100917 20:49:24 001 Xrd: ReadPartialAnswer: Reading a XrdClientMessage from the server [dc011:33130]... 100917 20:49:24 001 Xrd: ReadPartialAnswer: Server [dc011:33130] answered [kXR_error] (4003) 100917 20:49:24 001 Xrd: CheckErrorStatus: Server [dcgftp12.ifae.es:1094] declared: OpenRequest different from the one the redirector got(error code: 3000) ERROR Open Error opening the file /pnfs/ifae.es/IFAEAtlasTier2/t2atlasscratchdisk/group10/phys-sm/mc09_7TeV/group10.phys-sm.mc09_7TeV.107650.AlpgenJimmyZeeNp0_pt20.recon.ESD. e529_s765_s767_r1302.WZphys.100612.07.D3PD/group10.phys-sm.mc09_7TeV.107650.AlpgenJimmyZeeNp0_pt20.recon.ESD.e529_s765_s767_r1302.WZphys.100612.07.D3PD.D3PD._00001.root on h ost dcgftp12.ifae.es:1094 Error in <TXNetFile::CreateXClient>: open attempt failed on root://xrootd.ifae.es//pnfs/ifae.es/IFAEAtlasTier2/t2atlasscratchdisk/group10/phys-sm/mc09_7TeV/group10.phys-sm.mc0 9_7TeV.107650.AlpgenJimmyZeeNp0_pt20.recon.ESD.e529_s765_s767_r1302.WZphys.100612.07.D3PD/group10.phys-sm.mc09_7TeV.107650.AlpgenJimmyZeeNp0_pt20.recon.ESD.e529_s765_s767_r1 302.WZphys.100612.07.D3PD.D3PD._00001.root -- Carlos Osuna IFAE, Facultat Ciencies Nord UAB, E-08193 Bellaterra (Barcelona) Spain Email: [log in to unmask] Tel: +34 93 586 8257