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Hi Doug, The "failed to read header" simply means that the client did not get the response header. That usually means that either the server is too slow or there is a network issue. This causes the client to retry the request so nothing should be lost. The session messages are due to a long-standing bug that has been fixed in 3.1.1. It can be safely ignored as it means nothing really. Andy On Thu, 16 Feb 2012, Doug Benjamin wrote: > Dear all, > > I have a colleague that from time to time sees these errors. Any idea how > to help debug > this problem. > > Hi, > > Running root jobs that read ntuples stored in xrootd, the error > messages below appear from time to time. I am not sure how to interpret > the severity of those messages. Do they mean that files are being > skipped or that the error is transient or was recovered? > > Stephane. > > 120117 12:06:52 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:06:52 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:07:22 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:07:22 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:08:23 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:08:52 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:09:22 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:09:52 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:09:52 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:10:22 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:10:23 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:10:52 30658 Xrd: XrdClientMessage::ReadRaw: Failed to read > header (8 bytes). > 120117 12:21:39 001 Xrd: GoToAnotherServer: Going to: titan19:1094 > 120117 12:21:39 001 Xrd: CheckErrorStatus: Server [titan:1094] declared: > session not found(error > code: 3011) > 120117 12:21:58 001 Xrd: GoToAnotherServer: Going to: titan25:1094 > 120117 12:21:58 001 Xrd: CheckErrorStatus: Server [titan:1094] declared: > session not found(error > code: 3011) > 120117 12:22:12 001 Xrd: GoToAnotherServer: Going to: titan12:1094 > 120117 12:22:12 001 Xrd: CheckErrorStatus: Server [titan:1094] declared: > session not found(error > code: 3011) > 120117 12:22:33 001 Xrd: GoToAnotherServer: Going to: titan26:1094 > 120117 12:22:33 001 Xrd: CheckErrorStatus: Server [titan:1094] declared: > session not found(error > code: 3011) > 120117 12:22:46 001 Xrd: GoToAnotherServer: Going to: titan15:1094 > 120117 12:22:46 001 Xrd: CheckErrorStatus: Server [titan:1094] declared: > session not found(error > code: 3011) > > ######################################################################## > 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 > ######################################################################## 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