Hi, We have two US-based redirectors for CMS, located at xrootd.unl.edu and cmsxrootd1.fnal.gov. (We also have a DNS round robin for cmsxrootd.fnal.gov for those). They report to a global redirector at cms-xrd-global.cern.ch. I expected to get tried= for both xrootd.unl.edu and cmsxrootd1.fnal.gov; instead I only get one, leading to redirection loops. Here's the example, testing xrootd fallback from my local site (which has cmssrv203.fnal.gov and cmssrv224.fnal.gov) [burt@cmslpc41 ~]$ xrdcp -d 1 -f "root://cms-xrd-global.cern.ch//store/relval/CMSSW_7_1_0/RelValMinBiasVHS/GEN-SIM/START71_V8_dvmc-v1/00000/04FBB641-13FB-E311-8580-0025905AA9CC.root?tried=+1213cmssrv203.fnal.gov,+1213cmssrv224.fnal.gov" /dev/null 140630 11:02:29 28768 Xrd: main: (C) 2004-2011 by the XRootD collaboration. Version: v3.3.6 140630 11:02:29 28768 Xrd: Create: (C) 2004-2010 by the Xrootd group. XrdClient $Revision$ - Xrootd version: v3.3.6 140630 11:02:30 28768 Xrd: ShowUrls: The converted URLs count is 2 140630 11:02:30 28768 Xrd: ShowUrls: URL n.1: root://xrdfed10.cern.ch:1094//store/relval/CMSSW_7_1_0/RelValMinBiasVHS/GEN-SIM/START71_V8_dvmc-v1/00000/04FBB641-13FB-E311-8580-0025905AA9CC.root?tried=+1213cmssrv203.fnal.gov,+1213cmssrv224.fnal.gov. 140630 11:02:30 28768 Xrd: ShowUrls: URL n.2: root://xrdfed09.cern.ch:1094//store/relval/CMSSW_7_1_0/RelValMinBiasVHS/GEN-SIM/START71_V8_dvmc-v1/00000/04FBB641-13FB-E311-8580-0025905AA9CC.root?tried=+1213cmssrv203.fnal.gov,+1213cmssrv224.fnal.gov. 140630 11:02:30 28768 Xrd: ShowUrls: The converted URLs count is 2 140630 11:02:30 28768 Xrd: ShowUrls: URL n.1: root://xrdfed09.cern.ch:1094//store/relval/CMSSW_7_1_0/RelValMinBiasVHS/GEN-SIM/START71_V8_dvmc-v1/00000/04FBB641-13FB-E311-8580-0025905AA9CC.root?tried=+1213cmssrv203.fnal.gov,+1213cmssrv224.fnal.gov. 140630 11:02:30 28768 Xrd: ShowUrls: URL n.2: root://xrdfed10.cern.ch:1094//store/relval/CMSSW_7_1_0/RelValMinBiasVHS/GEN-SIM/START71_V8_dvmc-v1/00000/04FBB641-13FB-E311-8580-0025905AA9CC.root?tried=+1213cmssrv203.fnal.gov,+1213cmssrv224.fnal.gov. 140630 11:02:30 28768 Xrd: Open: Access to server granted. 140630 11:02:30 28768 Xrd: Open: Opening the remote file /store/relval/CMSSW_7_1_0/RelValMinBiasVHS/GEN-SIM/START71_V8_dvmc-v1/00000/04FBB641-13FB-E311-8580-0025905AA9CC.root?tried=+1213cmssrv203.fnal.gov,+1213cmssrv224.fnal.gov 140630 11:02:30 28768 Xrd: Open: File open in progress. 140630 11:02:30 28771 Xrd: HandleServerError: Received redirection to [cmsxrootd1.fnal.gov:1094]. Token=[]]. Opaque=[]. 140630 11:02:30 28771 Xrd: CheckErrorStatus: Server [cmsxrootd1.fnal.gov:1094] requested 1 seconds of wait 140630 11:02:31 28771 Xrd: CheckErrorStatus: Server [cmsxrootd1.fnal.gov:1094] requested 1 seconds of wait 140630 11:02:32 28771 Xrd: HandleServerError: Received redirection to [cms-xrd-global.cern.ch:1094]. Token=[]]. Opaque=[tried=+1213cmsxrootd1.fnal.gov]. 140630 11:02:32 28771 Xrd: CheckErrorStatus: Server [cms-xrd-global.cern.ch:1094] requested 4 seconds of wait. Server message is session still active 140630 11:02:37 28770 Xrd: XrdClientMessage::ReadRaw: Failed to read header (8 bytes). 140630 11:02:37 28771 Xrd: HandleServerError: Received redirection to [xrootd.unl.edu:1094]. Token=[]]. Opaque=[]. 140630 11:02:37 28771 Xrd: HandleServerError: Received redirection to [cmsxrootd1.fnal.gov:1094]. Token=[]]. Opaque=[]. 140630 11:02:37 28771 Xrd: CheckErrorStatus: Server [cmsxrootd1.fnal.gov:1094] requested 1 seconds of wait 140630 11:02:38 28771 Xrd: HandleServerError: Received redirection to [cms-xrd-global.cern.ch:1094]. Token=[]]. Opaque=[tried=+1213cmsxrootd1.fnal.gov]. 140630 11:02:38 28771 Xrd: HandleServerError: Received redirection to [xrootd.unl.edu:1094]. Token=[]]. Opaque=[]. 140630 11:02:38 28771 Xrd: HandleServerError: Received redirection to [cmsxrootd1.fnal.gov:1094]. Token=[]]. Opaque=[]. 140630 11:02:38 28771 Xrd: HandleServerError: Received redirection to [cms-xrd-global.cern.ch:1094]. Token=[]]. Opaque=[tried=+1213cmsxrootd1.fnal.gov]. 140630 11:02:38 28771 Xrd: HandleServerError: Received redirection to [xrootd.unl.edu:1094]. Token=[]]. Opaque=[]. 140630 11:02:38 28771 Xrd: HandleServerError: Received redirection to [cmsxrootd1.fnal.gov:1094]. Token=[]]. Opaque=[]. 140630 11:02:38 28771 Xrd: CheckErrorStatus: Server [cmsxrootd1.fnal.gov:1094] requested 1 seconds of wait 140630 11:02:39 28771 Xrd: CheckErrorStatus: Server [cmsxrootd1.fnal.gov:1094] requested 1 seconds of wait --- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/124 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1