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Posted to users@httpd.apache.org by kazekun <ap...@inet.polyu.edu.hk> on 2007/09/27 19:06:22 UTC

[users@httpd] Resource temporarily unavailable:,setuid: unable to change to uid: 502

Hello,

I'm new to linux and had installed apache 2.2.6 on Fedora 7 about
a month ago.  It seems to be working fine (still able to access the
website) except that when I check the error log today (Sept. 27), I
notice that there are some error messages

[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
setuid: unable to change to uid: 502
[Wed Sep 26 13:13:39 2007] [alert] Child 29448 returned a Fatal error...
Apache is exiting!

Then whenever the website is accessed, it gives the following message:

[Wed Sep 26 13:13:45 2007] [error] [client 203.168.204.205] (22)Invalid
argument: apr_global_mutex_lock(rewrite_log_lock) failed
[Wed Sep 26 13:13:45 2007] [error] [client 203.168.204.205] (22)Invalid
argument: apr_global_mutex_unlock(rewrite_log_lock) failed

Since I'm new to linux, I have no clue where to begin troubleshooting
the problem.  I would greatly appreciate if somebody could give me some
hint as to where to begin troubleshooting.  Thanks.

Eugene

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Re: [users@httpd] Resource temporarily unavailable:,setuid: unable to change to uid: 502

Posted by Scott Gifford <sg...@suspectclass.com>.
kazekun <ap...@inet.polyu.edu.hk> writes:

> Hello,
>
> I'm new to linux and had installed apache 2.2.6 on Fedora 7 about
> a month ago.  It seems to be working fine (still able to access the
> website) except that when I check the error log today (Sept. 27), I
> notice that there are some error messages
>
> [Wed Sep 26 13:13:38 2007] [alert] (11)Resource temporarily unavailable:
> setuid: unable to change to uid: 502

"Resource temporarily unavailable" is Unix error EAGAIN.  Here's what
the manpage for setuid(2) says on my system:

    ERRORS
       EAGAIN The uid does not match the current uid and uid brings
       process over it's NPROC rlimit.

Hopefully that will get you pointed in the right direction.

[...]

> Then whenever the website is accessed, it gives the following message:
>
> [Wed Sep 26 13:13:45 2007] [error] [client 203.168.204.205] (22)Invalid
> argument: apr_global_mutex_lock(rewrite_log_lock) failed
> [Wed Sep 26 13:13:45 2007] [error] [client 203.168.204.205] (22)Invalid
> argument: apr_global_mutex_unlock(rewrite_log_lock) failed

That could be caused by the above error; if setuid fails it might not
have permission to grab that mutex.

Good luck!

---Scott.

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