Apache shows resource unavailable to change to uid: <uid> and exits

Solution Verified - Updated -

Issue

  • Apache went down after the below messages in /var/log/httpd/error_log
[Wed Sep 05 00:06:20 2012] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48
[Wed Sep 05 00:06:20 2012] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48
[Wed Sep 05 00:06:20 2012] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48
[Wed Sep 05 00:06:20 2012] [alert] Child 23017 returned a Fatal error... Apache is exiting!
[Wed Sep 05 00:06:20 2012] [alert] (11)Resource temporarily unavailable: setuid: unable to change to uid: 48
[Wed Sep 05 00:06:20 2012] [emerg] (22)Invalid argument: couldn't grab the accept mutex
[Wed Sep 05 00:06:20 2012] [emerg] (22)Invalid argument: couldn't grab the accept mutex
[Wed Sep 05 00:06:20 2012] [emerg] (22)Invalid argument: couldn't grab the accept mutex

Environment

  • Red Hat Enterprise Linux 6
  • httpd

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