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Hi Geonmo, I am looking at log_20190228/failed/fallback_20190228091609. It looks like you are running on cms-t2-wn1047.sdfarm.kr, and trying to copy a file root://cmsxrootd.fnal.gov//store/test/xrootd/T2_BE_IIHE/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/A64CCCF2-5C76-E711-B359-0CC47A78A3F8.root The client was redirected to maite.iihe.ac.be:1094, successfully authenticated using GSI (see line 142), and then was sent to [2001:6a8:1080::b:92]:20341 (line 155). At there, the client seems to have successfully opened the file (line 158). After this, the log show that the client was sent to cms-xrd-transit.cern.ch:1094 for some reason (line 183). Unfortunately there is no info in between. So can you running the copy command manually? xrdcp -d 3 -f root://cmsxrootd.fnal.gov//store/test/xrootd/T2_BE_IIHE/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/A64CCCF2-5C76-E711-B359-0CC47A78A3F8.root /dev/null and see what happen? -- Wei Yang | [log in to unmask] | 650-926-3338 ________________________________________ From: [log in to unmask] <[log in to unmask]> on behalf of "Geonmo Ryu" <[log in to unmask]> Sent: Thursday, May 16, 2019 1:32 AM To: xrootd-l Subject: About XRootD Global Redirector test Hello, XRootD experts, We operated a CMS Tier-2 Center for CERN's CMS experiments. All CMS Tier-2 centers participating in this experiment must pass a monitoring system called SAM3. We are constantly experiencing one of the problems in this checking process. At a problematic test, it checked the remote data accessibility through global redirector of CMS/ It is set to download only a part of the file, so the actual amount transferred is very small, about a few MB. Therefore, the task is configured to finish within 240 seconds (4 minutes). I have found that this test is successful in some cases and that some tasks fail. When I looked at the failed jobs, I noticed that the following job redirection through the Global Redirector. After finding the final XRootD Server, it re-scanned the redirector server from Global XRootD Redirector again. We were able to see that it restarted without any distinguish message. - T2_BE_IIHE cmsxrootd.fnal.gov:1094 -> cms-xrd-global.cern.ch:1094 -> xrootd.ba.infn.it:1094 -> maite.iihe.ac.be:1095 -> maite.iihe.ac. be: 1094 -> [2001: 6a8: 1080 :: b: 92]: 20341 -> cmsxrootd.fnal.gov:1094 -> cms-xrd-global.cern.ch:1094 -> ...... The only information we know that one packet can be lost when going out of our center. When I tried to send a packet to the sites through the "MTR" program, I could see that only one packet disappeared. I suspect that this one packet makes a rescanning from the beginning point. If you have any information to resolve this problem, please let me know how to that. Regards, -------------------------------------------------------------------------------------------------- Geonmo Ryu / ·ù°Ç¸ð Korea Institute of Science and Technology Information (KISTI) Global Science Experimental Data Hub Center (GSDC) 245 Daehak-ro, Yuseong-gu, Daejeon, 305-806, Republic of Korea Tel : +82-42-869-1639, +82-10-4337-9423 Mail : [log in to unmask] / [log in to unmask] -------------------------------------------------------------------------------------------------- ________________________________ Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1