Recently I got following error message while viewing services in our nagios3 server.
Nagios Error: Could not read object configuration data
After debugging for an hour or more and reading some posts about this error not at got any hint about the issue.
At last I got to know the reason for this issue is there is no space left in the disc partition where the nagios3 configured.
Once I made some free space nagios3 working without any issue.