Issue: PHP Fatal Error prevents creating new pages

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July 8, 2013 10:03 PM

rizwank

New Member

PHP Fatal Error prevents creating new pages

Code:

[Mon Jul 08 05:37:07 2013] [error] [client  xxxx] PHP Fatal error:  Call to a member function setFetchMode() on a non-object in /var/www/html/forum/vault/core/controller/db/xf.php on line 133

Code:

xxxx - - [08/Jul/2013:05:37:01 -0700] "POST /wiki_ajax.php?c=create HTTP/1.1" 200 97 "http://mysiteurl/wiki_tools.php?do=integrate&action=edit&nodetypeid=21&nodeid=3625" "Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20100101 Firefox/17.0"
xxxx - - [08/Jul/2013:05:37:07 -0700] "GET /wiki_tools.php?do=integrate&action=edit&nodetypeid=21&nodeid=3625 HTTP/1.1" 200 138 "-" "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.116 Safari/537.36"

Issue Details

Issue Number 3179

Issue Type Bug

Project VaultWiki 4.x Series

Category Editing Pages

Status Fixed

Priority 1 - Security / Login / Data Loss

Affected Version 4.0.0 Beta 2

Fixed Version 4.0.0 Beta 3

Milestone VaultWiki 4 Beta X

Software DependencyAny

License TypePaid

Users able to reproduce bug 0

Users unable to reproduce bug 0

Attachments 0

Assigned Users (none)

Tags (none)

July 11, 2013 1:42 AM

pegasus

VaultWiki Team

Place the print_debug_backtrace snippet above all lines with setFetchMode in that file, and revisit wiki_css.php. I really need the backtrace info in order to diagnose the problem.

Reply

July 11, 2013 2:08 AM

rizwank

New Member

Code:

[Wed Jul 10 23:06:32 2013] [error] [client 23.20.162.103] PHP Fatal error:  Call to undefined function print_debug_backtrace() in /var/www/html/forum/vault/core/controller/db/xf.php on line 139
[Wed Jul 10 23:06:32 2013] [error] [client 23.20.162.103] PHP Fatal error:  Call to undefined function print_debug_backtrace() in /var/www/html/forum/vault/core/controller/db/xf.php on line 139
[Wed Jul 10 23:06:33 2013] [error] [client 23.20.162.103] PHP Fatal error:  Call to undefined function print_debug_backtrace() in /var/www/html/forum/vault/core/controller/db/xf.php on line 139

July 11, 2013 2:11 AM
pegasus

VaultWiki Team
Sorry, my mistake. The correct function call is "debug_print_backtrace". i.e. snippet:

Code:

if (!is_object($this->instance)) { debug_print_backtrace(); }

"debug" and "print" should be reversed as shown above.
Reply
July 11, 2013 2:19 AM
rizwank

New Member
Maybe you meant debug_print_backtrace?

Got it. One of the challenges is that that css load stays in cache, so i have to keep modifying the filename during edits.

trace contains confidental data so emailed to you.

btw just started seeing

Code:

[Wed Jul 10 23:15:25 2013] [error] [client 69.123.18.124] PHP Fatal error: Class 'vw_XenForo_Controller' not found in /var/www/html/forum/vault/core/view/ui/proxy/xf.php on line 140
Reply
July 11, 2013 3:23 AM

pegasus

VaultWiki Team

I was unable to duplicate the problem using the information learned by the traces you provided. I see that your first test site is also running Beta 2 and is not encountering the issue, which leads me to believe there is a configuration mishap afoot.

I have added another service to your members area. Please fill it out and I'll have a look. Unfortunately I've exhausted everything we can try without starting to significantly modify VaultWiki's files to see where the problem originates.

Reply
July 11, 2013 1:16 PM

rizwank

New Member

I don't think the first test site ever got to the point where we could post pages... I'll checkout hte services; and we can try out Beta 3 when the time comes.

Reply
July 11, 2013 10:38 PM

rizwank

New Member

Or I can uninstall and do a fresh reinstall. Can't wait until we can give this another production spin. =)

Reply
July 11, 2013 10:42 PM

rizwank

New Member

BTW I disabled all plugins, still had the error.

Reply
July 12, 2013 9:18 PM
pegasus

VaultWiki Team
In vault/core/controller/db/xf.php, find:

Code:

else { $dir = vw_Hard_Core::get_dir('deps');

Replace with:

Code:

if (!$this->instance) { $dir = vw_Hard_Core::get_dir('deps');

Let me know if it makes a difference.
Reply

July 12, 2013 9:54 PM

rizwank

New Member

Still an error, same

Code:

[Fri Jul 12 18:42:30 2013] [error] [client 23.23.48.40] PHP Fatal error:  Call to a member function setFetchMode() on a non-object in /var/www/html/forum/vault/core/controller/db/xf.php on line 133
[Fri Jul 12 18:42:30 2013] [error] [client 23.23.48.40] PHP Fatal error:  Call to a member function setFetchMode() on a non-object in /var/www/html/forum/vault/core/controller/db/xf.php on line 133
[Fri Jul 12 18:42:30 2013] [error] [client 23.23.48.40] PHP Fatal error:  Call to a member function setFetchMode() on a non-object in /var/www/html/forum/vault/core/controller/db/xf.php on line 133

I added

Code:

        public function query_read_slave($sql, $buffer = true)
        {
debug_print_backtrace($this);
                $this->instance->setFetchMode(Zend_Db::FETCH_ASSOC);

                return $this->instance->query($sql)->fetchAll();
        }

got

Code:

An exception occurred: debug_print_backtrace() expects parameter 1 to be long, object given in /var/www/html/forum/vault/core/controller/db/xf.php on line 132

XenForo_Application::handlePhpError()
debug_print_backtrace() in /var/www/html/forum/vault/core/controller/db/xf.php at line 132
vw_DB_Controller_XF->query_read_slave() in /var/www/html/forum/vault/core/model/db/mysql/vw.php at line 29
vw_DB_MySQL_Model->select() in /var/www/html/forum/vault/core/model/cache/vw.php at line 140
vw_Cache_Model->get() in /var/www/html/forum/vault/core/model/node/vw.php at line 310
vw_Node_Model->load() in /var/www/html/forum/vault/core/model/node/vw.php at line 26
vw_Node_Model->one() in /var/www/html/forum/vault/core/controller/fetch/vw.php at line 46
vw_Fetch_Controller->get() in /var/www/html/forum/vault/core/model/ui/tab/index/vw.php at line 34
vw_UI_Tab_Index_Model->can_main_tab() in /var/www/html/forum/vault/core/model/ui/tab/vw.php at line 58
vw_UI_Tab_Model->check() in vw/XenForo/CodeEventListener/Public.php at line 37
vw_XenForo_CodeEventListener_Public::navigation_tabs()
call_user_func_array() in XenForo/CodeEvent.php at line 54
XenForo_CodeEvent::fire() in XenForo/Dependencies/Public.php at line 464
XenForo_Dependencies_Public->_getNavigationContainerParams() in XenForo/Dependencies/Public.php at line 348
XenForo_Dependencies_Public->getEffectiveContainerParams() in vw/XenForo/Template/Public.php at line 29
vw_XenForo_Template_Public::fetch_template() in /var/www/html/forum/vault/core/view/template/xf.php at line 111
vw_Template_View_XF->ready() in /var/www/html/forum/vault/core/model/vw.php at line 336
vw_Hard_Core::fetch_template() in /var/www/html/forum/vault/core/view/stylevar/xf.php at line 58
vw_StyleVar_View_XF->_construct_delayed() in /var/www/html/forum/vault/core/view/stylevar/xf.php at line 43
vw_StyleVar_View_XF::getInstance() in /var/www/html/forum/vault/core/model/vw.php at line 186
vw_Hard_Core::fetch_object() in /var/www/html/forum/vault/core/model/vw.php at line 302
vw_Hard_Core::view() in /var/www/html/forum/vault/core/controller/css/vw.php at line 48
vw_CSS_Controller->resolve() in /var/www/html/forum/wiki_css.php at line 50

same if i

Code:

debug_print_backtrace($this->instance);

=====

so I replaced that with

Code:

        public function query_read_slave($sql, $buffer = true)
        {
ob_start();
var_dump($this->instance);
$result = ob_get_clean();
print $result;

and got what you'd expect ...

Code:

Zend_Db_Adapter_Mysqli

emailed with subj more info #3179

----

finally did

Code:

$a=get_class_methods($this->instance);
ob_start();
var_dump($a);
$result = ob_get_clean();
print $result;

got

Code:

array(43) { [0]=> string(24) "getQuoteIdentifierSymbol" [1]=> string(10) "listTables" [2]=> string(13) "describeTable" [3]=> string(11) "isConnected" [4]=> string(15) "closeConnection" [5]=> string(7) "prepare" [6]=> string(12) "lastInsertId" [7]=> string(12) "setFetchMode" [8]=> string(5) "limit" [9]=> string(18) "supportsParameters" [10]=> string(16) "getServerVersion" [11]=> string(11) "__construct" [12]=> string(13) "getConnection" [13]=> string(9) "getConfig" [14]=> string(11) "setProfiler" [15]=> string(11) "getProfiler" [16]=> string(17) "getStatementClass" [17]=> string(17) "setStatementClass" [18]=> string(5) "query" [19]=> string(16) "beginTransaction" [20]=> string(6) "commit" [21]=> string(8) "rollBack" [22]=> string(6) "insert" [23]=> string(6) "update" [24]=> string(6) "delete" [25]=> string(6) "select" [26]=> string(12) "getFetchMode" [27]=> string(8) "fetchAll" [28]=> string(8) "fetchRow" [29]=> string(10) "fetchAssoc" [30]=> string(8) "fetchCol" [31]=> string(10) "fetchPairs" [32]=> string(8) "fetchOne" [33]=> string(5) "quote" [34]=> string(9) "quoteInto" [35]=> string(15) "quoteIdentifier" [36]=> string(13) "quoteColumnAs" [37]=> string(12) "quoteTableAs" [38]=> string(14) "lastSequenceId" [39]=> string(14) "nextSequenceId" [40]=> string(8) "foldCase" [41]=> string(7) "__sleep" [42]=> string(8) "__wakeup" } array(43) { [0]=> string(24) "getQuoteIdentifierSymbol" [1]=> string(10) "listTables" [2]=> string(13) "describeTable" [3]=> string(11) "isConnected" [4]=> string(15) "closeConnection" [5]=> string(7) "prepare" [6]=> string(12) "lastInsertId" [7]=> string(12) "setFetchMode" [8]=> string(5) "limit" [9]=> string(18) "supportsParameters" [10]=> string(16) "getServerVersion" [11]=> string(11) "__construct" [12]=> string(13) "getConnection" [13]=> string(9) "getConfig" [14]=> string(11) "setProfiler" [15]=> string(11) "getProfiler" [16]=> string(17) "getStatementClass" [17]=> string(17) "setStatementClass" [18]=> string(5) "query" [19]=> string(16) "beginTransaction" [20]=> string(6) "commit" [21]=> string(8) "rollBack" [22]=> string(6) "insert" [23]=> string(6) "update" [24]=> string(6) "delete" [25]=> string(6) "select" [26]=> string(12) "getFetchMode" [27]=> string(8) "fetchAll" [28]=> string(8) "fetchRow" [29]=> string(10) "fetchAssoc" [30]=> string(8) "fetchCol" [31]=> string(10) "fetchPairs" [32]=> string(8) "fetchOne" [33]=> string(5) "quote" [34]=> string(9) "quoteInto" [35]=> string(15) "quoteIdentifier" [36]=> string(13) "quoteColumnAs" [37]=> string(12) "quoteTableAs" [38]=> string(14) "lastSequenceId" [39]=> string(14) "nextSequenceId" [40]=> string(8) "foldCase" [41]=> string(7) "__sleep" [42]=> string(8) "__wakeup" } array(43) { [0]=> string(24) "getQuoteIdentifierSymbol" [1]=> string(10) "listTables" [2]=> string(13) "describeTable" [3]=> string(11) "isConnected" [4]=> string(15) "closeConnection" [5]=> string(7) "prepare" [6]=> string(12) "lastInsertId" [7]=> string(12) "setFetchMode" [8]=> string(5) "limit" [9]=> string(18) "supportsParameters" [10]=> string(16) "getServerVersion" [11]=> string(11) "__construct" [12]=> string(13) "getConnection" [13]=> string(9) "getConfig" [14]=> string(11) "setProfiler" [15]=> string(11) "getProfiler" [16]=> string(17) "getStatementClass" [17]=> string(17) "setStatementClass" [18]=> string(5) "query" [19]=> string(16) "beginTransaction" [20]=> string(6) "commit" [21]=> string(8) "rollBack" [22]=> string(6) "insert" [23]=> string(6) "update" [24]=> string(6) "delete" [25]=> string(6) "select" [26]=> string(12) "getFetchMode" [27]=> string(8) "fetchAll" [28]=> string(8) "fetchRow" [29]=> string(10) "fetchAssoc" [30]=> string(8) "fetchCol" [31]=> string(10) "fetchPairs" [32]=> string(8) "fetchOne" [33]=> string(5) "quote" [34]=> string(9) "quoteInto" [35]=> string(15) "quoteIdentifier" [36]=> string(13) "quoteColumnAs" [37]=> string(12) "quoteTableAs" [38]=> string(14) "lastSequenceId" [39]=> string(14) "nextSequenceId" [40]=> string(8) "foldCase" [41]=> string(7) "__sleep" [42]=> string(8) "__wakeup" }

July 12, 2013 9:56 PM
rizwank

New Member
This is driving me nuts, because i can establish that it IS an object by doing

Code:

print gettype($this); print gettype($this->instance);
Reply

July 12, 2013 10:03 PM

rizwank

New Member

I think it's a Zend bug.

first, Zend_Db::FETCH_ASSOC = 2

if I do

Code:

$this->instance->setFetchMode(0);

then

Code:

An exception occurred: Invalid fetch mode '0' specified in /var/www/html/forum/library/Zend/Db/Adapter/Mysqli.php on line 478

It's obviously an object.

if I do

Code:

$this->instance->setFetchMode(2);

then

Code:

 [Fri Jul 12 18:58:42 2013] [error] [client 50.16.113.204] PHP Fatal error:  Call to a member function setFetchMode() on a non-object in /var/www/html/forum/vault/core/controller/db/xf.php on line 132

====
when doing

Code:

ob_start();
var_dump($this->connection);
$result = ob_get_clean();
print $result;

it should have a connection, no? Maybe the connection wasn't established in advance????

Code:

An exception occurred: Undefined property: vw_DB_Controller_XF::$connection in /var/www/html/forum/vault/core/controller/db/xf.php on line 133

XenForo_Application::handlePhpError() in /var/www/html/forum/vault/core/controller/db/xf.php at line 133
vw_DB_Controller_XF->query_read_slave() in /var/www/html/forum/vault/core/model/db/mysql/vw.php at line 29
vw_DB_MySQL_Model->select() in /var/www/html/forum/vault/core/model/cache/vw.php at line 140
vw_Cache_Model->get() in /var/www/html/forum/vault/core/model/node/vw.php at line 310
vw_Node_Model->load() in /var/www/html/forum/vault/core/model/node/vw.php at line 26
vw_Node_Model->one() in /var/www/html/forum/vault/core/controller/fetch/vw.php at line 46

July 12, 2013 10:05 PM

rizwank

New Member

Finally ...

http://stackoverflow.com/questions/1...n-a-non-object
http://stackoverflow.com/questions/1...n-setfetchmode

From code I've seen around the connection and query should be available before the setfetchmode.
http://www.smarty.net/forums/viewtop...e89ab44d9f2a d

Maybe this will fix your need to set it each time?

http://stackoverflow.com/questions/1...pdofetch-assoc

Reply
July 12, 2013 11:57 PM
pegasus

VaultWiki Team
You want to wrap the test code you're adding in a conditional, so it only outputs when the error is about to happen:

Code:

if (!is_object($this->instance)) { // some debug code } // error will happen on the next line
Reply
July 13, 2013 12:34 AM

pegasus

VaultWiki Team

I think I see how it happens. A function could be looping on itself. I will let you know more shortly.

Reply

+ Reply

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Issue: PHP Fatal Error prevents creating new pages

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