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Mailscanner causing Kernel Panics !

Discussion in 'E-mail Discussions' started by fuzioneer, Jan 9, 2006.

  1. fuzioneer

    fuzioneer Well-Known Member

    Dec 12, 2003
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    Over last few months we have had random hangs on our server (Centos 3.5) and after lots of investigation it appears that Mailscanner could be the culprit

    Got our host company to leave keyboard and mouse plugged into server and relay what they could say during last crash

    their answer was "The server has froozen with the process MailScanner PID 8112 causing a kernel panic. This freezes the CPU according to the screen error."

    anyone else encountered issues like this with mailscanner ?
  2. chirpy

    chirpy Well-Known Member

    Jun 15, 2002
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    Go on, have a guess
    I've never seen MailScanner as the cause:

    1. Make sure you're using the latest version of MailScanner (upgrade using my script if it's installed with that)

    2. It's possible that since MailScanner can use a reasonable chunk of memory that it's being caught by a bad memory stick. If that could be the case then I'd get your datacenter to run memtest on the memory (they'll have to boot it onto a floppy) and check the memory out incase it's gone bad.
  3. Snowman30

    Snowman30 Well-Known Member

    Apr 7, 2002
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    DataCenter Provider
    Ive noticed on one of our xeon servers that loads were cgoing beserk with mailscanner using up huge amounts of cpu resources

    we have added 2Gb of ram (making it 4Gb) and still the loads sit up around 20+

    turn off mailscanner and loads are under 2

    any ideas as to why this would be happening?

    I know mailscanner uses resources but this is nuts...

    the servers a dual 2.8 xeon 4Gb ram running RHE3 the latest S of cpanel, latest mailscanner install and running with max 7 child processes in mailscanner

    heres the stats from mailwatch:

    Status MailScanner: YES 21 children
    Exim: YES 34 proc(s)
    Load Average:
    24.58 29.95 31.16
    Mail Queues
    Inbound: 0
    Outbound: 0

    Today's Totals Processed: 8,957 286.2Mb
    Clean: 4,165 46.5%
    Viruses: 36 0.4%
    Top Virus: Worm.SomeFool.P
    Blocked files: 2 0.0%
    Others: 1 0.0%
    Spam: 3,230 36.1%
    High Scoring Spam: 1,523 17.0%
    MCP: 0 0.0%
    High Scoring MCP: 0 0.0%

    anyone have any suggestions?

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