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Large Core Dump Files (10 posts)

  1. annakyn
    Member
    Posted 3 years ago #

    Hi, I was wondering if people could help me. I am getting very large core dump files being generated on my server that are being caused by something within WordPress. I asked my server guys and they've suggested it might be a plugin but not managed to find which one. Anyone got any experience of this.

    The core dumps fill up my server space and stop all emails and uploads from working, which is getting very frustrating! I manually delete the files daily via ftp!

    Using gdb the core dumps read:
    '[Thu Sep 22 12:34:12 2011] [error] [client 80.176.148.117] Premature end of script headers: index.php, referer: http://www.climbshetland.co.uk/2011/image-upload-issue-resolved/'

    Any help is appreciated.

  2. esmi
    Forum Moderator
    Posted 3 years ago #

    That's not a WordPress issue. It's a server problem. Contact your hosts.

  3. annakyn
    Member
    Posted 3 years ago #

    I contacted them and they thought it was a wordpress plugin that could be causing it. Do you not think that's the case?

  4. esmi
    Forum Moderator
    Posted 3 years ago #

    Unlikely. The dumps are being caused when their server falls over.

  5. annakyn
    Member
    Posted 3 years ago #

    Interesting, thanks. If/When I find the solution, I'll post it on here for anyone else with similar issues.

  6. Christi
    Member
    Posted 3 years ago #

    Hi annakyn,

    Unlikely. The dumps are being caused when their server falls over.

    I will admit that I'm not an expert with core dumps, but I don't believe it is always an issue with your hosting company. For example, if the problem was with your hosting company, then wouldn't everyone on the server be getting core dumps and then contacting the host with complaints? It does sound like core dumps can be caused by php scripts, but I'm honestly not sure how to test and replicate this.

    I did find other posts where users state that certain plugins are causing core dumps, so you may want to run through enabling / disabling your plugins to see what could be causing it.

    http://wordpress.org/support/topic/core-dump-files-safari-triggers (plugin + Safari causing issue)

    http://wordpress.org/support/topic/wordpress-causing-core-dumps (running WordPress on wrong version of PHP)

    Besides using "gdb", you can also find more info using the "strings" command, but again I'm not sure how helpful all that data will be. There is a quick php script you can run to help reviewing the core dumps a little easier, you can find it here:
    All about Core Dumps

  7. esmi
    Forum Moderator
    Posted 3 years ago #

    Last time I had this issue, it was server-specific and followed a server upgrade. The hosts fixed it very quickly and confirmed that it was a server issue - not a WP one.

  8. annakyn
    Member
    Posted 3 years ago #

    Thanks everyone. I can't seem to find a plugin that triggers it. Also, it appears to happen only once a day, but not regularly, which implies that it's caused by something cumulative that eventually gives up and causes the error.

  9. Christi
    Member
    Posted 3 years ago #

    Hi annakyn,

    I'm just touching base to see if you by chance were able to make any progress on the core dumps?

  10. annakyn
    Member
    Posted 3 years ago #

    Hi. Thanks for remembering. We're still slightly reluctant to post about a success, but we think that the WordPress.com stats plugin was the issue. Disabling it has stopped the core dump files. I'm just re-enabling W3 Total Cache again as I also disabled this at the same time, so I'm assuming they won't start happening again.

    I will try reinstalling the stats plugin as its very strange that no one else has had the issue. If it definitely is that then I'll report it to them as a possible bug.

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