[Mediawiki-l] Blank Page

[Marian Aldenhövel]

Hi,

I have set up a MediaWiki-Installation a few weeks ago to help
communication between members of a distributed development team.
The server is a machine running Debian Woody, and everything went
absolutely silk-smooth.

Now the wiki has suddenly quit. I cannot (of course) remember having
changed anything around the system.

No matter what kind of request I make the server now just returns
a 200 result-code and no data. This is the output of FireFox
Live-Headers:

 > http://xxx.xxx.xxx.xxx/devel/index.php/Hauptseite
 >
 > GET /devel/index.php/Hauptseite HTTP/1.1
 > Host: xxx.xxx.xxx.xxx
 > User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6)
 > Gecko/20040206 Firefox/0.8
 > Accept:
 > 
text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,video/x-mng,image/png,image/jpeg,image/gif;q=0.2,*/*;q=0.1
 > Accept-Language: en-us,en;q=0.5
 > Accept-Encoding: gzip,deflate
 > Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
 > Keep-Alive: 300
 > Connection: keep-alive
 > Authorization: Basic bWFyaWFuOkdhbW1hMjE=
 >
 > HTTP/1.x 200 OK
 > Date: Sun, 06 Jun 2004 14:15:29 GMT
 > Server: Apache
 > X-Powered-By: PHP/4.1.2
 > Content-Encoding: gzip
 > Vary: Accept-Encoding
 > Content-Length: 26
 > Keep-Alive: timeout=15, max=99
 > Connection: Keep-Alive
 > Content-Type: text/html

I tried setting wgDebugLogFile and checked the output. There is
nothing in that file that looks like anything went wrong.

I tried to install another instance of the Skript under a different
name. That installation went just as fine as the first, but demonstrates
the problem right away. No output.

So I suspect there is a problem with my database. Again: I do not
remember any change in setup. Using the commandline I can still connect
to the database under the account and with the password specified in
LocalSettings.php by using the mysql commandline-interface.

I tried running index.php on the commandline. No error, no output at
all.

I then tried strace as an attempt to find out what the script was doing
before it terminates. Here's the tail of the output of that run:

 > fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK)  = 0
 > read(4, 0x85a3a30, 8192)                = -1 EAGAIN (Resource 
temporarily unavailable)
 > fcntl64(4, F_SETFL, O_RDWR)             = 0
 > write(4, "I\0\0\0\3SELECT cur_text FROM cur WH"..., 77) = 77
 > read(4, "\1\0\0\1", 4)                  = 4
 > read(4, "\1", 1)                        = 1
 > read(4, "\27\0\0\2", 4)                 = 4
 > read(4, "\3cur\10cur_text\3\377\377\377\1\374\3\21\0\0", 23) = 23
 > read(4, "\1\0\0\3", 4)                  = 4
 > read(4, "\376", 1)                      = 1
 > brk(0x89a6000)                          = 0x89a6000
 > read(4, "\33\0\0\4", 4)                 = 4
 > read(4, "\32/^([\344|\366|\374|\337|a-z]+)(.*)$/sD", 27) = 27
 > read(4, "\1\0\0\5", 4)                  = 4
 > read(4, "\376", 1)                      = 1
 > time(NULL)                              = 1086431027
 > gettimeofday({1086431027, 339641}, NULL) = 0
 > close(7)                                = 0
 > close(6)                                = 0
 > close(5)                                = 0
 > rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_IGN}, 8) = 0
 > fcntl64(4, F_SETFL, O_RDWR|O_NONBLOCK)  = 0
 > read(4, 0x85a3a30, 8192)                = -1 EAGAIN (Resource 
temporarily unavailable)
 > fcntl64(4, F_SETFL, O_RDWR)             = 0
 > write(4, "\1\0\0\0\1", 5)               = 5
 > shutdown(4, 2 /* send and receive */)   = 0
 > close(4)                                = 0
 > rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_IGN}, 8) = 0
 > setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
 > setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={30, 0}}, NULL) = 0
 > rt_sigaction(SIGPROF, {0x82195b4, [PROF], SA_RESTART|0x4000000}, 
{0x82195b4, [PROF], SA_RESTART|0x4000000}, 8) =
0
 > rt_sigprocmask(SIG_UNBLOCK, [PROF], NULL, 8) = 0
 > setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
 > munmap(0x409f8000, 358472)              = 0
 > _exit(0)                                = ?

To my rather untrained eye this looks like it is in fact talking to
the database and querying the table cur. Which it is supposed to do
I would say.

Any idea what is broken here? How can I find out?

Ciao, MM
-- 
Marian Aldenhövel, Rosenhain 23, 53123 Bonn.
Fon +49 228 624013, Fax +49 228 624031.
http://www.marian-aldenhoevel.de
"Wie trennt man drei Schlampen von zwei Säufern? Cockpittüre zu!"