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I have a Nagios 4.1.1 on Centos 7.2 with pnp4nagios-0.6.25 default rpm setup.
The trending graph looks ok but /var/log/nagios/nagios.log is flooded with following message.
Looking at R1 but I still don't have idea what may cause this issue.
[1462825553] wproc: SERVICE PERFDATA job 6391 from worker Core Worker 18344 is a non-check helper but exited with return code 2
[1462825553] wproc: early_timeout=0; exited_ok=1; wait_status=512; error_code=0;
[1462825553] wproc: SERVICE PERFDATA job 6391 from worker Core Worker 18342 is a non-check helper but exited with return code 2
[1462825553] wproc: early_timeout=0; exited_ok=1; wait_status=512; error_code=0;