[Plugin: W3 Total Cache] Fatal error after emptying (opcode) cache

Just set

Minified using disk
Page Caching using disk (enhanced)
Database Caching using xcache

and things are working now brilliantly well actually.

Fatal error: xcache_clear_cache() [<a href='function.xcache-clear-cache'>function.xcache-clear-cache</a>]: unexpect 8 bytes of xcache.admin.pass, expected 32 bytes, the password after md5() in /home/design24/public_html/wp-content/plugins/w3-total-cache/lib/W3/Cache/Xcache.php on line 89

Wrong xcache.ini setting: xcache.admin.pass should be md5 hash of password and 32 symbols length.

Hi Frederick, I now realize this as well. Could you tell how to set/reset this?

;xcache.admin.user = "admin"
;xcache.admin.pass	= ""
;xcache.admin.enable_auth = On
xcache.test = Off
xcache.coredump_directory = ""

Hi Frederick,

With some pain and effort it’s working like a charm.

Again, much appreciated.

Great.

@taragon
can you also explain us how have you resolved your issue?

I have a similar issue too, but I don’t know what to do.

My error is:
Fatal error: xcache_clear_cache() [<a href='function.xcache-clear-cache'>function.xcache-clear-cache</a>]: xcache.admin.user and xcache.admin.pass is required in /home/siti/www.1e2.it/1e2.it/htdocs/wp-content/plugins/w3-total-cache/lib/W3/Cache/Xcache.php on line 89

and my xcache.ini file is:

# configuration for php Xcache module

[xcache-common]
;; install as zend extension (recommended), normally "$extension_dir/xcache.so"
zend_extension = /usr/lib/php5/20060613+lfs/xcache.so

[xcache.admin]
xcache.admin.enable_auth = On
# Configure this to use admin pages
; xcache.admin.user = "mOo"
; xcache.admin.pass = md5($your_password)
; xcache.admin.pass = ""

[xcache]
; ini only settings, all the values here is default unless explained

; select low level shm/allocator scheme implemenation
xcache.shm_scheme =        "mmap"
; to disable: xcache.size=0
; to enable : xcache.size=64M etc (any size > 0) and your system mmap allows
xcache.size  =                16M
; set to cpu count (cat /proc/cpuinfo |grep -c processor)
xcache.count =                 1
; just a hash hints, you can always store count(items) > slots
xcache.slots =                8K
; ttl of the cache item, 0=forever
xcache.ttl   =                 0
; interval of gc scanning expired items, 0=no scan, other values is in seconds
xcache.gc_interval =           0

; same as aboves but for variable cache
xcache.var_size  =            0M
xcache.var_count =             1
xcache.var_slots =            8K
; default ttl
xcache.var_ttl   =             0
xcache.var_maxttl   =          0
xcache.var_gc_interval =     300

xcache.test =                Off
; N/A for /dev/zero
xcache.readonly_protection = Off
; for *nix, xcache.mmap_path is a file path, not directory.
; Use something like "/tmp/xcache" if you want to turn on ReadonlyProtection
; 2 group of php won't share the same /tmp/xcache
; for win32, xcache.mmap_path=anonymous map name, not file path
xcache.mmap_path =    "/dev/zero"

; leave it blank(disabled) or "/tmp/phpcore/"
; make sure it's writable by php (without checking open_basedir)
xcache.coredump_directory =   ""

; per request settings
xcache.cacher =               On
xcache.stat   =              Off
xcache.optimizer =           Off

[xcache.coverager]
; per request settings
; enable coverage data collecting for xcache.coveragedump_directory and xcache_coverager_start/stop/get/clean() functions (will hurt executing performance)
xcache.coverager =          Off

; ini only settings
; make sure it's readable (care open_basedir) by coverage viewer script
; requires xcache.coverager=On
xcache.coveragedump_directory = ""

Here is the solution:
uncomment the line with ;xcache.admin.enable_auth = On (that is remove the ; at the beginning) and change the option to Off. The result must be:
xcache.admin.enable_auth = Off

And now it works!

Thanks.

@galerio: i tried your solution but it still error.

;xcache.admin.user = "admin"
;xcache.admin.pass      = ""
xcache.admin.enable_auth = Off
xcache.test = Off
xcache.coredump_directory = ""

I tried again

nano /etc/php5/cgi/conf.d/xcache.ini

xcache.admin.enable_auth = Off

Not found error, but when i add new post, it cannt save draft (always: Saving Draft… )

Sorry, for my part, I cannot guess other solutions without investigating on your server. Anyone else?

This is probably silly, but when you edited the xcache.ini and saved it with the auth to OFF setting… did you restart apache?
“/etc/init.d/apache2 restart”

I had the same problem you were having. So, I edited the xcache.ini and restarted the httpd server, no problems working swell.

@mikanett?

I also get the same error.

Fatal error: xcache_clear_cache() [function.xcache-clear-cache]: xcache.admin.user and xcache.admin.pass is required in …line 89.

While the site is working, I cannot add/edit post and do a whole bunch of stuff.

Too bad I do not know php or how to edit the xcache.ini. I paid host to install and make the modifications but I don’t know why they can’t modify the portion where you could turn the admin.user off.

What I did was to comment out the function up to line 89. And the errors all went away.

Question is: Is it ok to comment out that particular function? What would be the subsequent effect? Anyone knows what that particular function is for? The php line goes

/**
     * Flushes all data
     *
     * @return boolean
     */
    /**function flush()
    {
        xcache_clear_cache(XC_TYPE_VAR, 0);

        return true;
    }*/

I have the above disabled, what would happen?

my host, probably exasperated over my lack of knowledge installed xcache.ini in w3tc directory. I tried editing files to no avail. The same error appears when I publish or update blogs or empty caches. Although, changes are nonetheless made in updated blogs even when the error appears. Anyone having the same problem?