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"Premature end of script headers" (suPHP after Upgrade)

Discussion in 'General Discussion' started by Owl, Oct 25, 2015.

  1. Owl

    Owl Member

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    Hello,

    I attempted to upgrade server today using EasyApache 3 (as i have done many times). This time around, I started receiving 500 error messages after the update (Apache 2.2 and PHP5). Looking at the error logs, I found the following:

    "Premature end of script headers: index.php"

    I discovered that if I change the PHP handler to any of the other options (like dso) the page will display as normal. As far as I'm aware, I had not changed any other settings when updating, so I'm not sure why this is suddenly a problem.

    I set the suPHP debugging level to info for a moment, but the only log that I got was one noting Executing as UID/GID. The numbers it shows are accurate to what they should be executing as.

    I found other related questions like this, however none of those solutions worked for me. Any help would be much appreciated.

    Thanks!
     
    #1 Owl, Oct 25, 2015
  2. Owl

    Owl Member

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    Looks like I spoke too soon... dso worked for the front page of one of my sites. And throws errors on the rest. Also, CGI throws 500 errors as well... Might be something deeper.
     
    #2 Owl, Oct 25, 2015
    Last edited: Oct 25, 2015
  3. Owl

    Owl Member

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    For others who are seeing this, the (hopefully temporary) solution I've gotten to work is disable suExec, switch your handler to fastCgi, and then go through and update the permissions on your files to allow your apache user (usually "nobody") the same permissions as the regular user you were running as.
     
    #3 Owl, Oct 26, 2015
  4. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    Hello :)

    Were there any additional messages in /usr/local/apache/logs/error_log when the website failed to load? While your solution may have worked, it's generally advised to determine the cause of the problem rather than disabling suexec and modifying file ownership.

    Thank you.
     
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    #4 cPanelMichael, Oct 29, 2015
  5. Owl

    Owl Member

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    Absolutely agree that I'd love to actually fix the problem. There are no other logs generated in the error_log beside "Premature end of script headers: index.php".
     
    #5 Owl, Oct 29, 2015
  6. madmanmachines

    madmanmachines Well-Known Member

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    Hi,

    With the suPHP handler, have you ensured proper permissions(http://boomshadow.net/tech/fixes/fixperms-script/)? I'd also recommend temporarily disabling your firewall and testing if your code makes calls to external resources. You can also debug with the `strace' command and by executing the code manually from the terminal.

    Thanks,
     
    #6 madmanmachines, Oct 30, 2015
  7. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    You can also review /usr/local/apache/logs/suphp_log to see if there's any additional information about suPHP in this log.

    Thank you.
     
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    #7 cPanelMichael, Oct 30, 2015
  8. Owl

    Owl Member

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    @madmanmachines -- Ran that script. Same error occurring. Also, it won't be a firewall issue since everything was running just fine previously to updating apache.

    @cPanelMichael -- There's nothing in that log. Any other ideas?
     
    #8 Owl, Oct 30, 2015
  9. cPanelMichael

    cPanelMichael Technical Support Community Manager Staff Member

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    It's difficult to determine the exact reason if you are no longer using the same environment. Feel free to let us know if the issue persists after switching suExec to "On".

    Thank you.
     
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    #9 cPanelMichael, Nov 2, 2015
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