apinger error every minute: Error while feeding rrdtool: Broken pipe

[opnsense_user12123]

using 17.7.5 - 17.7.12 i got an apinger error. After update to 18.1_1 same problem.

these messages appear in the gateway log.

i can only fix this problem temporarily by clicking the "save" - button under reporting - settings - rrdtools.
then after a few hours i got these messages ever minute again.
I reinstalled rrdtools changes nothing -> same problem again.
What can i do ?

the messages from log:

Code: [Select]

Jan 30 16:47:35 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 16:46:35 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 16:42:35 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 16:41:35 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 16:37:35 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 16:36:35 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 16:35:35 apinger: Starting Alarm Pinger, apinger(468)
Jan 30 16:35:35 apinger: Exiting on signal 15.
Jan 30 16:34:15 apinger: Starting Alarm Pinger, apinger(35109)
Jan 30 16:34:15 apinger: Exiting on signal 15.
Jan 30 16:33:56 apinger: Starting Alarm Pinger, apinger(47327)
Jan 30 16:21:09 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 16:20:09 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 16:16:09 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 16:15:09 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 16:14:09 apinger: Starting Alarm Pinger, apinger(25849)
Jan 30 16:14:09 apinger: Exiting on signal 15.
Jan 30 16:12:47 apinger: Starting Alarm Pinger, apinger(29620)
Jan 30 16:12:46 apinger: Exiting on signal 15.
Jan 30 16:12:29 apinger: Starting Alarm Pinger, apinger(42162)
Jan 30 16:10:43 apinger: Exiting on signal 15.
Jan 30 16:09:50 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 16:08:50 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 16:04:50 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 16:03:50 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 16:02:50 apinger: Starting Alarm Pinger, apinger(434)
Jan 30 16:02:50 apinger: Exiting on signal 15.
Jan 30 16:01:29 apinger: Starting Alarm Pinger, apinger(37218)
Jan 30 16:01:29 apinger: Exiting on signal 15.
Jan 30 16:01:10 apinger: Starting Alarm Pinger, apinger(48443)
Jan 30 15:42:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:41:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 15:37:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:36:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 15:32:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:31:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 15:27:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:26:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 15:22:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:21:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 15:17:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:16:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 15:12:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:11:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 15:07:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:06:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 15:02:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 15:01:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:57:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:56:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:52:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:51:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:47:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:46:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:42:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:41:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:37:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:36:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:32:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:31:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:27:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:26:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:22:38 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:21:38 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:17:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:16:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:12:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:11:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:07:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:06:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 14:02:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 14:01:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:57:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:56:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:52:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:51:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:47:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:46:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:42:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:41:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:37:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:36:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:32:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:31:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:27:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:26:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:22:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:21:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:17:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:16:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:12:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:11:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:07:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:06:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 13:02:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 13:01:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 12:57:37 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 12:56:37 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 12:52:36 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 12:51:36 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 12:47:36 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 12:46:36 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 12:42:36 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 12:41:36 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 12:37:36 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 12:36:36 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 12:32:36 apinger: rrdtool respawning too fast, waiting 300s.
Jan 30 12:31:36 apinger: Error while feeding rrdtool: Broken pipe
Jan 30 12:27:36 apinger: rrdtool respawning too fast, waiting 300s.

What can i do ?