Problem
You are finding log messages in your Checkmk log files ~/var/log/*.log and do not understand at first sight, what they tell you.
Solution
The following is a listing of common messages in the above-mentioned log files and what can be learned from them.
cmc.log
| Message | Description |
|---|---|
| [client $NUMBER] Polling failed: Bad file descriptor | If using livestatus proxy these messages are expected and can be disregarded. |
| [client $NUMBER] Polling failed: Connection timed out | These messages occur, when the connection to another livestatus |
| [client $NUMBER] error: client connection terminated: timeout | |
| [generic pool] [helper $NUMBER] killed by signal 1 | The generic helper did not finish in a timely manner, so it was killed. |
| [helper $NUMBER] [log] Error in PIGGYBACK fetcher: MKTimeout('Fetcher for host "$HOST" timed out after 60 seconds') | |
| [helper $NUMBER] [log] Error in SNMP fetcher: ValueError("invalid literal for int() with base 10: ''") | Probably invalid SNMP output, you should have received a crash report. Please upload this crash report. |
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