Sarah, >Date: Fri, 26 Aug 2005 18:07:12 -0600 (MDT) >From: "sarah thompson" <address@hidden> >Organization: NOAA/NWS/FSL >To: address@hidden >Subject: LDM - ldm process becomes defunct on server The above message contained the following: > Institution: noaa/fsl > Package Version: 6.4.1 > Operating System: fedora core 4 > Hardware Information: dell poweredge 750 > Inquiry: Have an upstream "server" that is feeding data to 2 > downstream machines. I'm running fedora core 4..which i think is what > you all are running. i'm on kernel 2.6.12-1 > I compiled with gdb but when the upstream machine "dies" meaning > all process' reporting as defunct, it didn't produce a core file. On a Linux system, the following must be true for a normally-installed LDM to dump a corefile: 1. "ulimit -c" must return a non-zero value (preferably "unlimited") 2. The file "/proc/sys/kernel/suid_dumpable" must contain a "2". > the downstream machines have this message in their ldmd.log > NOTICE: requester6.c:447; ldm_clnt.c:310: nullproc_6 failure to > eldmf1.fsl.no aa.gov; ldm_clnt.c:145: RPC: Timed out The above means that a downstream LDM-6 process sent a NULLPROC message to an upstream LDM-6 but the reply from the upstream LDM-6 timed-out. An obvious candidate is that the upstream LDM lacks an ALLOW entry for the downstream host in the upstream LDM's configuration-file. What does the following command return when executed on the downstream host? /usr/sbin/rpcinfo -n 388 -t eldmf1.fsl.no aa.gov 300029 6 This command bypasses the LDM on the downstream host, completely and should indicate that the LDM on the upstream host is available, e.g., $ /usr/sbin/rpcinfo -n 388 -t oliver.unidata.ucar.edu 300029 6 program 300029 version 6 ready and waiting If it fails, then is there anything corresponding to the connection attempt in the logfile of the upstream LDM? > I have been testing for weeks now on many os' and different kernels > and eventually ldm always crashes with the above error. What version of the LDM? > I have attached the ldmd.log. I didn't see any evidence of the LDM crashing in the logfile you sent. > I have no idea what else to test. Hope you have > insights, as I'm all out of troubleshooting ideas. Thanks. Sarah ... Regards, Steve Emmerson
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