Hello,
Still facing the same error after deleting the .rrd and .xml file of the service I was looking for.
It is good to note that I have only deleted the the files associated with my service and not all files in the host folder.
Also, those perf data graphs are being generated by a passive check using nrdp.
I couldn't cat the .rrd file, otherwise below is the .xml file output:
[hayekp@nagios-l GSIP-ZTP-SBC]$ cat X128_TRUNK_GITRK0000010121.xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<NAGIOS>
<DATASOURCE>
<TEMPLATE>check_dummy</TEMPLATE>
<RRDFILE>/usr/local/nagios/share/perfdata/GSIP-ZTP-SBC/X128_TRUNK_GITRK0000010121.rrd</RRDFILE>
<RRD_STORAGE_TYPE>SINGLE</RRD_STORAGE_TYPE>
<RRD_HEARTBEAT>8460</RRD_HEARTBEAT>
<IS_MULTI>0</IS_MULTI>
<DS>1</DS>
<NAME>Ongoing_Calls</NAME>
<LABEL>Ongoing Calls</LABEL>
<UNIT></UNIT>
<ACT>333</ACT>
<WARN></WARN>
<WARN_MIN></WARN_MIN>
<WARN_MAX></WARN_MAX>
<WARN_RANGE_TYPE></WARN_RANGE_TYPE>
<CRIT></CRIT>
<CRIT_MIN></CRIT_MIN>
<CRIT_MAX></CRIT_MAX>
<CRIT_RANGE_TYPE></CRIT_RANGE_TYPE>
<MIN></MIN>
<MAX></MAX>
</DATASOURCE>
<DATASOURCE>
<TEMPLATE>check_dummy</TEMPLATE>
<RRDFILE>/usr/local/nagios/share/perfdata/GSIP-ZTP-SBC/X128_TRUNK_GITRK0000010121.rrd</RRDFILE>
<RRD_STORAGE_TYPE>SINGLE</RRD_STORAGE_TYPE>
<RRD_HEARTBEAT>8460</RRD_HEARTBEAT>
<IS_MULTI>0</IS_MULTI>
<DS>2</DS>
<NAME>Ingress_Calls</NAME>
<LABEL>Ingress Calls</LABEL>
<UNIT></UNIT>
<ACT>0</ACT>
<WARN></WARN>
<WARN_MIN></WARN_MIN>
<WARN_MAX></WARN_MAX>
<WARN_RANGE_TYPE></WARN_RANGE_TYPE>
<CRIT></CRIT>
<CRIT_MIN></CRIT_MIN>
<CRIT_MAX></CRIT_MAX>
<CRIT_RANGE_TYPE></CRIT_RANGE_TYPE>
<MIN></MIN>
<MAX></MAX>
</DATASOURCE>
<DATASOURCE>
<TEMPLATE>check_dummy</TEMPLATE>
<RRDFILE>/usr/local/nagios/share/perfdata/GSIP-ZTP-SBC/X128_TRUNK_GITRK0000010121.rrd</RRDFILE>
<RRD_STORAGE_TYPE>SINGLE</RRD_STORAGE_TYPE>
<RRD_HEARTBEAT>8460</RRD_HEARTBEAT>
<IS_MULTI>0</IS_MULTI>
<DS>3</DS>
<NAME>Egress_Calls</NAME>
<LABEL>Egress Calls</LABEL>
<UNIT></UNIT>
<ACT>333</ACT>
<WARN></WARN>
<WARN_MIN></WARN_MIN>
<WARN_MAX></WARN_MAX>
<WARN_RANGE_TYPE></WARN_RANGE_TYPE>
<CRIT></CRIT>
<CRIT_MIN></CRIT_MIN>
<CRIT_MAX></CRIT_MAX>
<CRIT_RANGE_TYPE></CRIT_RANGE_TYPE>
<MIN></MIN>
<MAX></MAX>
</DATASOURCE>
<RRD>
<RC>0</RC>
<TXT>successful updated</TXT>
</RRD>
<NAGIOS_AUTH_HOSTNAME>GSIP-ZTP-SBC</NAGIOS_AUTH_HOSTNAME>
<NAGIOS_AUTH_SERVICEDESC>X128_TRUNK:GITRK0000010121</NAGIOS_AUTH_SERVICEDESC>
<NAGIOS_CHECK_COMMAND>check_dummy!0!"No data received yet."</NAGIOS_CHECK_COMMAND>
<NAGIOS_DATATYPE>SERVICEPERFDATA</NAGIOS_DATATYPE>
<NAGIOS_DISP_HOSTNAME>GSIP-ZTP-SBC</NAGIOS_DISP_HOSTNAME>
<NAGIOS_DISP_SERVICEDESC>X128_TRUNK:GITRK0000010121</NAGIOS_DISP_SERVICEDESC>
<NAGIOS_HOSTNAME>GSIP-ZTP-SBC</NAGIOS_HOSTNAME>
<NAGIOS_HOSTSTATE>UP</NAGIOS_HOSTSTATE>
<NAGIOS_HOSTSTATETYPE>HARD</NAGIOS_HOSTSTATETYPE>
<NAGIOS_MULTI_PARENT></NAGIOS_MULTI_PARENT>
<NAGIOS_PERFDATA>'Ongoing Calls'=333;;;;'Ingress Calls'=0;;;;'Egress Calls'=333;;;; </NAGIOS_PERFDATA>
<NAGIOS_RRDFILE>/usr/local/nagios/share/perfdata/GSIP-ZTP-SBC/X128_TRUNK_GITRK0000010121.rrd</NAGIOS_RRDFILE>
<NAGIOS_SERVICECHECKCOMMAND>check_dummy!0!"No data received yet."</NAGIOS_SERVICECHECKCOMMAND>
<NAGIOS_SERVICEDESC>X128_TRUNK_GITRK0000010121</NAGIOS_SERVICEDESC>
<NAGIOS_SERVICEOUTPUT>Ongoing_Calls:333 Ingress_Calls:0 Egress_Calls:333 Max Calls:0 Status:Available</NAGIOS_SERVICEOUTPUT>
<NAGIOS_SERVICEPERFDATA>'Ongoing Calls'=333;;;;'Ingress Calls'=0;;;;'Egress Calls'=333;;;;</NAGIOS_SERVICEPERFDATA>
<NAGIOS_SERVICESTATE>OK</NAGIOS_SERVICESTATE>
<NAGIOS_SERVICESTATETYPE>HARD</NAGIOS_SERVICESTATETYPE>
<NAGIOS_TIMET>1497434977</NAGIOS_TIMET>
<NAGIOS_XMLFILE>/usr/local/nagios/share/perfdata/GSIP-ZTP-SBC/X128_TRUNK_GITRK0000010121.xml</NAGIOS_XMLFILE>
<XML>
<VERSION>4</VERSION>
</XML>
</NAGIOS>