Could not open the requested SVN filesystem, File permissions seem OK

Question

I'm getting the "Could not open the requested SVN filesystem" error when accessing my SVN repository via HTTP (Apache)

httpd.conf

<...>
LoadModule dav_module modules/mod_dav.so
LoadModule dav_svn_module modules/mod_dav_svn.so
<...>
User svn
Group svn
<...>
<Location /svn>
   DAV svn
   SVNPath /srv/svn
</Location>

SVN repository seems to have correct permissions

[ec2-user@ip-xxx ~]$ ls -lart /srv/svn
total 16
drwxrwxrwx. 3 root root   16 Oct 20 10:58 ..
-rw-rw-r--. 1 svn  svn   229 Oct 20 10:58 README.txt
drwxrwxr-x. 2 svn  svn    39 Oct 20 10:58 locks
drwxrwxr-x. 2 svn  svn  4096 Oct 20 10:58 hooks
drwxrwxr-x. 2 svn  svn    51 Oct 20 10:58 conf
-r--r--r--. 1 svn  svn     2 Oct 20 10:58 format
drwxrwxr-x. 6 svn  svn    80 Oct 20 10:58 .
drwxrwsr-x. 6 svn  svn  4096 Oct 20 10:58 db

I am running Apache as user svn

[ec2-user@ip-xxx ~]$ ps auxwww|grep httpd
ec2-user 14304  0.0  0.0 110276   996 pts/0    T    06:07   0:00 less /etc/httpd/conf/httpd.conf
root     15102  0.0  0.5 240004  5496 ?        Ss   08:39   0:00 /usr/sbin/httpd -DFOREGROUND
svn      15103  0.0  0.3 240004  3116 ?        S    08:40   0:00 /usr/sbin/httpd -DFOREGROUND
svn      15104  0.0  0.3 240004  3116 ?        S    08:40   0:00 /usr/sbin/httpd -DFOREGROUND
svn      15105  0.0  0.3 240004  3116 ?        S    08:40   0:00 /usr/sbin/httpd -DFOREGROUND
svn      15106  0.0  0.3 240004  3116 ?        S    08:40   0:00 /usr/sbin/httpd -DFOREGROUND
svn      15107  0.0  0.4 240164  4124 ?        S    08:40   0:00 /usr/sbin/httpd -DFOREGROUND

Apache error log

[Tue Oct 27 08:40:10.515487 2015] [authz_core:debug] [pid 15107] mod_authz_core.c(835): [client ::1:56072] AH01628: authorization result: granted (no directives)
[Tue Oct 27 08:40:10.515747 2015] [:error] [pid 15107] (20014)Internal error: [client ::1:56072] Can't open file '/srv/svn/format': Permission denied
[Tue Oct 27 08:40:10.515760 2015] [dav:error] [pid 15107] [client ::1:56072] Could not fetch resource information.  [500, #0]
[Tue Oct 27 08:40:10.515763 2015] [dav:error] [pid 15107] [client ::1:56072] Could not open the requested SVN filesystem  [500, #13]
[Tue Oct 27 08:40:10.515765 2015] [dav:error] [pid 15107] [client ::1:56072] Could not open the requested SVN filesystem  [500, #13]

SVN works with file access but not http:

[ec2-user@ip-xxx ~]$ svn list file://localhost/srv/svn
branches/
src/
[ec2-user@ip-xxx ~]$ svn list http://localhost/svn
svn: E000013: Unable to connect to a repository at URL 'http://localhost/svn'
svn: E000013: Could not open the requested SVN filesystem

I also tried to change permissions for /srv/svn/format to 666, but it did not help.

Red Hat Enterprise Linux Server release 7.1. SVN version 1.8.8

Answer 1

The reason for the error was SELinux module preventing access to the files. I've disabled SELinux by editing /etc/selinux/config file (see how) and, after reboot, svn list http://localhost/svn finally works.