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Hello, We have upgraded to SL7 and xrootd-4.11.2-1 a CMS AAA redirector (was running 4.6.1-1/SL6); both cmsd and xrootd are running. We see many file location request queries coming through, which are probably coming from the global CMS redirectors. However, the xrootd requests to this redirector are hanging for no obvious reason. We get these lines in the xrootd.log ... 200715 12:50:19 3630 cmsplt03.298:[log in to unmask] XrootdProtocol: stalling client for 10 sec 200715 12:50:19 3584 uscms01.1131:[log in to unmask] XrootdProtocol: stalling client for 10 sec 200715 12:50:19 3422 cms002.300:[log in to unmask] XrootdProtocol: stalling client for 10 sec One of us tried to ask the redirector directly for a file and he couldn'e see the location request in his logs. Do you have any idea what is going on? I attach the 5,000 lines from xrootd and cmsd logs. The contents of our xrootd config file are the shown below. Many thanks, George xrd.port 1213 if exec cmsd xrd.port 1094 if exec xrootd all.sitename T1_UK_RAL all.role manager all.manager meta xrootd-cms.infn.it+:1213 all.manager cms-xrootd.gridpp.ac.uk+:1213 all.export /store xrootd.trace emsg login stall redirect cms.trace files ofs.authorize 1 acc.authdb /etc/xrootd/Authfile acc.audit deny grant xrootd.seclib /usr/lib64/libXrdSec.so xrootd.fslib /usr/lib64/libXrdOfs.so all.adminpath /var/run/xrootd #all.pidpath /var/run/xrootd cms.delay startup 10 lookup 1 qdl 30 qdn 2 servers 1 cms.fxhold 1200s cms.ping 30 cms.sched cpu 0 io 0 runq 0 pag 0 fuzz 100 refreset 3600 xrd.sched mint 40 maxt 204800 avlt 512 idle 780 xrd.network keepalive kaparms 5m,5s,5 xrd.timeout idle 30m xrd.report xrootd.t2.ucsd.edu:9931 every 30s all sync #Updated configuration to make monitoring work. Replaced non-existent xrootd-mon.grid.hep.ph.ic.ac.uk:9930 xrootd.monitor all fstat 60s lfn ops ssq xfr 5 ident 5m dest fstat info user CMS-AAA-EU-COLLECTOR.cern.ch:9330 # Tier 1 monitoring xrootd.monitor all auth flush 30s mbuff 1472 window 5s dest files io info redir user 172.16.114.101:9930 cms.allow host *.ac.uk xrootd.redirect xrootd-cms.infn.it:1094 ? /store This email and any attachments are intended solely for the use of the named recipients. If you are not the intended recipient you must not use, disclose, copy or distribute this email or any of its attachments and should notify the sender immediately and delete this email from your system. UK Research and Innovation (UKRI) has taken every reasonable precaution to minimise risk of this email or any attachments containing viruses or malware but the recipient should carry out its own virus and malware checks before opening the attachments. UKRI does not accept any liability for any losses or damages which the recipient may sustain due to presence of any viruses. Opinions, conclusions or other information in this message and attachments that are not related directly to UKRI business are solely those of the author and do not represent the views of UKRI. ######################################################################## 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