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Hi Pete, When xrootd sends a request to the olbd it expects a reply in about 5 seconds (tunable via a config parameter). If no reply is received, the message comes out and the client is asked to wait and come back later. This gives the xrootd time to find another olbd, if necessary. Andy ----- Original Message ----- From: "Peter Elmer" <[log in to unmask]> To: <[log in to unmask]> Sent: Monday, March 28, 2005 7:46 AM Subject: "xxx got no response" message in redirector logs > Hi Andy, > > I just played the game of removing all normal messages from the > redirector > logs to see what remains. On one of the redirectors at SLAC there was one > message which I didn't recognize: > > bbr-olb04> cat /var/adm/xrootd/logs/xrdlog | grep -v "asked to wait" | > grep -v redirected | grep -v login | grep -v " disc " | grep -v "xrootd > protocol anchor trim done" > 050328 00:00:00 059 (c) 2004 Stanford University/SLAC xrd version > 20050321-0425_dbg > 050328 02:14:08 097 odc_Locate: polci.3440:169@noma0080 got no response > from bbr-rdr04 > path=/store/PR/R12/AllEvents/0002/42/12.3.4e/AllEvents_00024239_12.3.4eV00_C14.2.0bV01.01.root > bbr-olb04> > > The full history for this client process is in (a) below. It _looks_ like > the client was subsequently properly redirected for that file (and he came > back to ask for another file 21 seconds later, so the application didn't > exit with some error either). What does the "got no response from > bbr-rdr04" > message mean? > > Pete > > (a) > > bbr-olb04> grep "polci.3440:169@noma0080" /var/adm/xrootd/logs/xrdlog > 050328 01:15:09 091 XrootdXeq: polci.3440:169@noma0080 login > 050328 01:15:09 091 odc_Locate: polci.3440:169@noma0080 redirected to > kan024.sla > c.stanford.edu:1094 by bbr-rdr04 > path=/store/PRskims/R12/14.4.0c/BRecoToDDstar/0 > 1/BRecoToDDstar_0164.01.root > 050328 01:15:10 091 odc_Locate: polci.3440:169@noma0080 redirected to > kan038.sla > c.stanford.edu:1094 by bbr-rdr04 > path=/store/PRskims/R12/14.4.0c/BRecoToDDstar/0 > 1/BRecoToDDstar_0164.02HUBC.root > 050328 01:15:10 091 odc_Locate: polci.3440:169@noma0080 asked to wait 5 by > bbr-r > dr04 > path=/store/PR/R12/AllEvents/0002/42/12.4.0g/AllEvents_00024299_12.4.0gV01_ > C14.2.0bV00.01.root > 050328 01:15:15 091 odc_Locate: polci.3440:169@noma0080 redirected to > kan031.sla > c.stanford.edu:1094 by bbr-rdr04 > path=/store/PR/R12/AllEvents/0002/42/12.4.0g/Al > lEvents_00024299_12.4.0gV01_C14.2.0bV00.01.root > 050328 02:14:08 097 odc_Locate: polci.3440:169@noma0080 got no response > from bbr > -rdr04 > path=/store/PR/R12/AllEvents/0002/42/12.3.4e/AllEvents_00024239_12.3.4eV0 > 0_C14.2.0bV01.01.root > 050328 02:14:13 029 odc_Locate: polci.3440:169@noma0080 redirected to > kan035.sla > c.stanford.edu:1094 by bbr-rdr04 > path=/store/PR/R12/AllEvents/0002/42/12.3.4e/Al > lEvents_00024239_12.3.4eV00_C14.2.0bV01.01.root > 050328 04:20:34 097 odc_Locate: polci.3440:169@noma0080 redirected to > kan005.sla > c.stanford.edu:1094 by bbr-rdr04 > path=/store/PR/R12/AllEvents/0002/43/12.4.0g/Al > lEvents_00024343_12.4.0gV01_C14.2.0bV01.01.root > 050328 04:53:36 032 XrootdXeq: polci.3440:169@noma0080 disc 3:38:27 > bbr-olb04> > > ------------------------------------------------------------------------- > Peter Elmer E-mail: [log in to unmask] Phone: +41 (22) 767-4644 > Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland > ------------------------------------------------------------------------- >