mcelog cron error

[Pallieter Koopmans]

For future reference (since I had not found this documented somewhere).

>/etc/cron.hourly/mcelog.cron:
>
>mcelog: Cannot access bus threshold trigger `bus-error-trigger': Permission denied

The solution (thanks Tristan for the idea) was to fix the SElinux rights to the triggers file. Here the longer explanation:

>Aug 23 13:01:01 copyhosting run-parts(/etc/cron.hourly)[3171]: starting mcelog.cron
>Aug 23 13:01:01 copyhosting run-parts(/etc/cron.hourly)[3205]: finished mcelog.cron
>
>$ mcelog --client
>
>mcelog: client connect: No such file or directory
>mcelog: client command write: Transport endpoint is not connected
>mcelog: client read: Invalid argument
>mcelog: client connect: No such file or directory
>mcelog: client command write: Transport endpoint is not connected
>mcelog: client read: Invalid argument
>
>/var/mcelog:
>
>mcelog: Cannot access bus threshold trigger `bus-error-trigger': Permission denied
>
>$ uname -a
>
>Linux 2.6.32-573.3.1.el6.x86_64 #1 SMP Thu Aug 13 22:55:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
>
>$ pwd; ll
>/etc/mcelog
>drwxr-xr-x. 2 root root 4.0K Aug 20 23:11 .
>drwxr-xr-x. 123 root root 12K Aug 23 12:55 ..
>-rwxr-xr-x. 1 root root 801 Jul 23 22:35 bus-error-trigger
>-rwxr-xr-x. 1 root root 1.1K Jul 23 22:35 cache-error-trigger
>-rwxr-xr-x. 1 root root 1.2K Jul 23 22:35 dimm-error-trigger
>-rwxr-xr-x. 1 root root 742 Jul 23 22:35 iomca-error-trigger
>-rw-r--r--. 1 root root 6.2K Jul 23 22:35 mcelog.conf
>-rwxr-xr-x. 1 root root 1.3K Jul 23 22:35 page-error-trigger
>-rwxr-xr-x. 1 root root 1.1K Jul 23 22:35 socket-memory-error-trigger
>-rwxr-xr-x. 1 root root 946 Jul 23 22:35 unknown-error-trigger
>
>$ cat /ect/mcelog.conf (partial snip):
>
>bus-uc-threshold-trigger = bus-error-trigger
>directory = /etc/mcelog
>
>$ dmesg | grep mce
>
>mce: CPU supports 10 MCE banks
>
>Plesk 12.0.18 CentOS 6 1200150615.10
>
>$ cd /etc/mcelog/
>
>$ ll -Z
>drwxr-xr-x. root root system_ubject_r:etc_t:s0 .
>drwxr-xr-x. root root system_ubject_r:etc_t:s0 ..
>-rwxr-xr-x. root root system_ubject_r:etc_t:s0 bus-error-trigger
>-rwxr-xr-x. root root system_ubject_r:bin_t:s0 cache-error-trigger
>-rwxr-xr-x. root root system_ubject_r:etc_t:s0 dimm-error-trigger
>-rwxr-xr-x. root root system_ubject_r:etc_t:s0 iomca-error-trigger
>-rw-r--r--. root root system_ubject_r:etc_t:s0 mcelog.conf
>-rwxr-xr-x. root root system_ubject_r:etc_t:s0 page-error-trigger
>-rwxr-xr-x. root root system_ubject_r:etc_t:s0 socket-memory-error-trigger
>-rwxr-xr-x. root root system_ubject_r:etc_t:s0 unknown-error-trigger
>
>$ chcon --reference=cache-error-trigger *-error-trigger
>
>$ ls -Z
>-rwxr-xr-x. root root system_ubject_r:bin_t:s0 bus-error-trigger
>-rwxr-xr-x. root root system_ubject_r:bin_t:s0 cache-error-trigger
>-rwxr-xr-x. root root system_ubject_r:bin_t:s0 dimm-error-trigger
>-rwxr-xr-x. root root system_ubject_r:bin_t:s0 iomca-error-trigger
>-rw-r--r--. root root system_ubject_r:etc_t:s0 mcelog.conf
>-rwxr-xr-x. root root system_ubject_r:bin_t:s0 page-error-trigger
>-rwxr-xr-x. root root system_ubject_r:bin_t:s0 socket-memory-error-trigger
>-rwxr-xr-x. root root system_ubject_r:bin_t:s0 unknown-error-trigger
>
>$ tail /var/log/mcelog
>mcelog: Cannot access bus threshold trigger `bus-error-trigger': Permission denied
>
>$ sh /etc/cron.hourly/mcelog.cron
>
>$ tail /var/log/mcelog
>mcelog: Cannot access bus threshold trigger `bus-error-trigger': Permission denied
>
>No new record, so this solved the problem. No more cron job error emails. PS: I did not have semanage installed, hence the chcon reference.

 

[IgorG]

Sorry, could you please explain how this issue related to Plesk?