Hi, I'm using qemu+ssh://username@hostname/system as the remote URI. Libvirt seems to be communicating fine until some 2 minutes (we poll every 5 seconds) and then it throws up RPC error and many counters are wrong. But if I collect on localhost the counters seems to be coming fine. Test and testvm are guests on the local machine where as Win8 and Ubuntu* are remote URI's connected through ssh. What causes this error "libvir: RPC error : End of file while reading data: : Input/output error" and how do we fix it ? I've pasted the logfile inline. Localhost from which we are connecting: uname -aLinux iwf0044110 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux root@iwf0044110:/home1/parakkal/COLLABNET_11.10_NEW/hpsw-oa/PA/numsVob/linux/2.2/Linux2.6_64_debug# cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=12.04 DISTRIB_CODENAME=precise DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS" root@iwf0044110:/home1/parakkal/COLLABNET_11.10_NEW/hpsw-oa/PA/numsVob/linux/2.2/Linux2.6_64_debug# virsh version Compiled against library: libvir 0.9.8 Using library: libvir 0.9.8 Using API: QEMU 0.9.8 Running hypervisor: QEMU 1.0.0 Remote host: root@iwf004461:/home1/parakkal/COLLABNET_11.10_NEW/hpsw-oa/PA/numsVob/linux/2.2# uname -a Linux iwf004461 3.0.0-12-server #20-Ubuntu SMP Fri Oct 7 16:36:30 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux root@iwf004461:/home1/parakkal/COLLABNET_11.10_NEW/hpsw-oa/PA/numsVob/linux/2.2# cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=11.10 DISTRIB_CODENAME=oneiric DISTRIB_DESCRIPTION="Ubuntu 11.10" root@iwf004461:/home1/parakkal/COLLABNET_11.10_NEW/hpsw-oa/PA/numsVob/linux/2.2# virsh version Compiled against library: libvir 0.9.2 Using library: libvir 0.9.2 Using API: QEMU 0.9.2 Running hypervisor: QEMU 0.14.1 Note: libvirt.so not present, using /usr/lib/libvirt.so.0 libvir: error : no connection driver available for No connection for URI xen:/// No Xen on this system NOTE: 1 memory stats available out of 8 libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: QEMU error : Requested operation is not valid: cgroup CPU controller is not mounted NOTE: scheduler type not available libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:23:07 | testvm | Running 04:23:07 | test | Running 04:23:07 | Win8 | Running 04:23:07 | Ubuntu11.10 | Running 04:23:07 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:23:18 | testvm | Running 04:23:18 | test | Running 04:23:18 | Win8 | Running 04:23:18 | Ubuntu11.10 | Running 04:23:18 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:23:25 | testvm | Running 04:23:25 | test | Running 04:23:25 | Win8 | Running 04:23:25 | Ubuntu11.10 | Running 04:23:25 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:23:32 | testvm | Running 04:23:32 | test | Running 04:23:32 | Win8 | Running 04:23:32 | Ubuntu11.10 | Running 04:23:32 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:23:40 | testvm | Running 04:23:40 | test | Running 04:23:40 | Win8 | Running 04:23:40 | Ubuntu11.10 | Running 04:23:40 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:23:47 | testvm | Running 04:23:47 | test | Running 04:23:47 | Win8 | Running 04:23:47 | Ubuntu11.10 | Running 04:23:47 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:23:55 | testvm | Running 04:23:55 | test | Running 04:23:55 | Win8 | Running 04:23:55 | Ubuntu11.10 | Running 04:23:55 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:24:02 | testvm | Running 04:24:02 | test | Running 04:24:02 | Win8 | Running 04:24:02 | Ubuntu11.10 | Running 04:24:02 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:24:10 | testvm | Running 04:24:10 | test | Running 04:24:10 | Win8 | Running 04:24:10 | Ubuntu11.10 | Running 04:24:10 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:24:17 | testvm | Running 04:24:17 | test | Running 04:24:17 | Win8 | Running 04:24:17 | Ubuntu11.10 | Running 04:24:17 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:24:24 | testvm | Running 04:24:24 | test | Running 04:24:24 | Win8 | Running 04:24:24 | Ubuntu11.10 | Running 04:24:24 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:24:32 | testvm | Running 04:24:32 | test | Running 04:24:32 | Win8 | Running 04:24:32 | Ubuntu11.10 | Running 04:24:32 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:24:39 | testvm | Running 04:24:39 | test | Running 04:24:39 | Win8 | Running 04:24:39 | Ubuntu11.10 | Running 04:24:39 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:24:46 | testvm | Running 04:24:46 | test | Running 04:24:46 | Win8 | Running 04:24:46 | Ubuntu11.10 | Running 04:24:46 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:24:54 | testvm | Running 04:24:54 | test | Running 04:24:54 | Win8 | Running 04:24:54 | Ubuntu11.10 | Running 04:24:54 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:25:01 | testvm | Running 04:25:01 | test | Running 04:25:01 | Win8 | Running 04:25:01 | Ubuntu11.10 | Running 04:25:01 | Ubuntu12.04 | Running libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known libvir: error : internal error getaddrinfo failed for 'iwf004461': Name or service not known 04:25:09 | testvm | Running 04:25:09 | test | Running 04:25:09 | Win8 | Running 04:25:09 | Ubuntu11.10 | Running 04:25:09 | Ubuntu12.04 | Running libvir: RPC error : End of file while reading data: : Input/output error 04:25:16 | testvm | Running 04:25:16 | test | Running 04:25:16 | Win8 | Nostate 04:25:16 | Ubuntu11.10 | Nostate 04:25:16 | Ubuntu12.04 | Nostate libvir: RPC error : End of file while reading data: : Input/output error 04:25:20 | testvm | Running 04:25:20 | test | Running 04:25:20 | Win8 | Nostate 04:25:20 | Ubuntu11.10 | Nostate 04:25:20 | Ubuntu12.04 | Nostate libvir: RPC error : End of file while reading data: : Input/output error 04:25:25 | testvm | Running 04:25:25 | test | Running 04:25:25 | Win8 | Nostate 04:25:25 | Ubuntu11.10 | Nostate 04:25:25 | Ubuntu12.04 | Nostate Regards, Navin P.S. 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