Having time difference warning and discarded samples messages in the Foglight log files (4265522)

Having time difference warnings in the Foglight Management Server (FMS) logs and discarded sample messages in the Foglight Agent Manager (FglAM) logs:

Example FMS log:
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2017-16-24 10:35:56.738 WARN Discarded value of observation Process_TopCPU on topology object TopCPU (7e4fdb82-4089-484a-b4c4-d5b978e203b2) because its timestamp is very different from that of the management server. Remote: 24/10/17 10:35:36, local: 24/10/16 10:35. Please ensure that the system time on the [hostname] host is synchronized with the management server time.

Example FglAM log:
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017-10-24 10:37:26.773 WARN    [Quartz[0]-1671] com.quest.glue.core.comms.filters.StaleDataFilter - Discarding sample a105b2ac-f181-4bff-a99c-872ae89cc557 timestamped at 18.10.2017 8:54:11 CEST because it is 6 days 1 hour 43 minutes 15 seconds older than the server's current time and will be rejected anyway. The data sample was submitted by ActiveDirectory/5.6.9/ActiveDirectory/[yourAgent] on [hostname].

The Foglight Agent Manager (FglAM) on the host is sending old cached data to the FMS. This can happen if there was downtime on the FMS recently.

Check the following directory on the FglAM host to see if there are any large files in the directory

$FGLAMHOME\state\default\cache

If there are large files in the directory execute the following steps:

1. Stop the FglAM
2. Remove the cached data from the $FGLAMHOME\state\default\cache directory
3. Start the FglAM