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Thread: System "hangs" because of cron

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  1. #1
    speedyad1 NNTP User

    Default System "hangs" because of cron

    Hi,
    I installed OpenSuse 11 and have the following errors:
    after the system running some hours (over night) it hangs- I cannot make a shutdown nor start an application. i just can start a shell. after entering ps -A I see a cron process over 20 times.
    the only way to restart the pc is to use the reset-key...
    my hardware:
    amd quadcore
    4gb memory
    3ware 9550sx 4lp raid controller with 4 hds in raid 5
    3ware 8006 2lp raid controller with 2 hds in raid 0

    software
    ldap with samba as pdc
    vmware server 1.7
    webmin latest version

    does anyone know the cause for this symptoms?

  2. #2
    Join Date
    Jun 2008
    Location
    The Netherlands
    Posts
    1,273

    Default Re: System "hangs" because of cron

    Starting from the bottom and working up see if /var/log/messages specifies anything that could indicate what's making the system lockup.

    Also check /etc/cron.d & /etc/cron.daily for jobs that might be causing this. You can list cron jobs for users by running (as root):
    crontab -u <username> -l

    Is it possible that hibernation or standby is trying to kick in and failing?
    Have a lot of fun!

  3. #3
    speedyad1 NNTP User

    Default Re: System "hangs" because of cron

    Hi,
    thank you for your fast reply. I will check this tonight when I´ll be back at home.
    Where can I see if hybernation or standby are causing problems?

    Later I will post the results of crontab and the log

  4. #4
    Join Date
    Jun 2008
    Location
    The Netherlands
    Posts
    1,273

    Default Re: System "hangs" because of cron

    /var/log/pm-suspend.log can give indication of problems with suspending.

    I would first try disabling suspend (using the power option tools specific to your DE) to see if the system is still responsive in the morning.

    Good luck
    Have a lot of fun!

  5. #5
    speedyad1 NNTP User

    Default Re: System "hangs" because of cron

    Hi,
    have now checked the pc:

    there are some files in cron.dayly:
    suse-clean_catman
    suse-dc_mandb
    suse.de-backup-rc.config
    suse.de-backup-rpmdb
    suse.de-check-battery
    suse.de-clean-tmp
    suse.de-cron-local
    suse.de-update-preload
    suse.de-updatedb

    entering crontab -u root -l shows:
    tempdelete.pl (from webmin application)

    in var/log/messages: there are no suspicious informations.
    But in var/log/warn I have the following entries:

    powersaved[3299] WARNING (CpufreqManagement:52) No capability cpufreq_control
    kernel: ACPI Exception (thermal -0465): AE_ERROR, ACPI thermal trip point state changes
    kernel: Please send acpidupt to linux-acpi@vger.kernel.org
    powersaved [3299]: WARNING (continueEvent:250) Could not execute program /usr/lib/powersave/scripts for event daemon.scheme.change: No such file or directory
    kernel: powernow-k8: MP systems not supported by PSB Bios structure

    I have no pm-suspend.log on the system

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