Hello, I recently upgraded my xymon servers (primary and failover) from Xymon 4.2.3 to 4.3.18. After the upgrade, we noticed gaps in such as CPU Utilization, TCP/IP Statistics, and Block IO, but only for clients that are running the xymon 4.2.3 client, not for those running the Big Brother client. I built a new 4.3.18 client but we still see gaps. We are running the old vmstat-bf.sh and netstat-bf.sh extension scripts in the xymon client. I turned on debugging for rrdstatus and rrddata on our failover server, and saw errors such as the ones below during the times when there was a gap. Does anyone have ideas on how to troubleshoot and fix this? Why was the xymon client working ok with xymon server 4.2.3 and not 4.3.18? from rrdstatus.log 12793 2015-07-15 14:24:20 xymond_rrd: Got message 73002 @@status#73002/its-splun k-log1.syr.edu|1436984660.571622|128.230.1.66||its-splunk-log1.syr.edu|netstat|1 436986460|green||green|1435596907|0||0||1436984369|linux|NSM/UNIX/Misc24x7|0| 12793 2015-07-15 14:24:20 startpos 770321, fillpos 770321, endpos -1 12793 2015-07-15 14:24:20 Flushing '/its-splunk-log1.syr.edu/netstat.rrd' with 4 updates pending, template 'udpInDatagrams:udpOutDatagrams:udpInErrors:tcpActive Opens:tcpPassiveOpens:tcpAttemptFails:tcpEstabResets:tcpCurrEstab:tcpOutDataByte s:tcpInInorderBytes:tcpInUnorderBytes:tcpRetransBytes:tcpOutDataPackets:tcpInIno rderPackets:tcpInUnorderPackets:tcpRetransPackets' 12793 2015-07-15 14:24:20 RRD error updating /usr/local/xymon/xymon-current/data /rrd/its-splunk-log1.syr.edu/netstat.rrd from 128.230.1.66: /usr/local/xymon/xym on-current/data/rrd/its-splunk-log1.syr.edu/netstat.rrd: illegal attempt to upda te using time 1436983760 when last update time is 1436983769 (minimum one second step) 12793 2015-07-15 14:24:20 Flush, but xymonmsg is empty from rrddata.log 12806 2015-07-15 16:27:30 Flushing '/its-splunk-log1.syr.edu/netstat.rrd' with 4 updates pending, template 'udpInDatagrams:udpOutDatagrams:udpInErrors:tcpActive Opens:tcpPassiveOpens:tcpAttemptFails:tcpEstabResets:tcpCurrEstab:tcpOutDataByte s:tcpInInorderBytes:tcpInUnorderBytes:tcpRetransBytes:tcpOutDataPackets:tcpInIno rderPackets:tcpInUnorderPackets:tcpRetransPackets' 12806 2015-07-15 16:27:30 Flushing cache '/its-splunk-log1.syr.edu/vmstat.rrd' 12806 2015-07-15 16:27:30 Flushing '/its-splunk-log1.syr.edu/vmstat.rrd' with 10 updates pending, template 'cpu_r:cpu_b:cpu_w:mem_swpd:mem_free:mem_buff:mem_cac h:mem_si:mem_so:dsk_bi:dsk_bo:cpu_int:cpu_csw:cpu_usr:cpu_sys:cpu_idl:cpu_wait' 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Flush of '/its-splunk-log1.syr.edu/' skipped, too soon 12806 2015-07-15 16:27:30 Want msg 38335, startpos 431139, fillpos 431139, endpo s -1, usedbytes=0, bufleft=3767260 12806 2015-07-15 16:27:30 Got 1121 bytes Thanks ! Nicole