[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #15 from Nemo  ---
Some related links.
* Established IRC bot to relay fatals: https://translatewiki.net/wiki/Rakkaus
* New beta fatals mailing list messages:
http://lists.wikimedia.org/pipermail/qa/2014-January/001000.html
* Structured logging for the future:


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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Krenair  changed:

   What|Removed |Added

 CC||kren...@gmail.com

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #14 from Bawolff (Brian Wolff)  ---
As a compromise could we include:
*The exception description (aka "foo" part of throw new MWException( 'foo' ) )
*A backtrace without the arguments included (just function names).

I can't imagine there would be sensitive information in that.

(In reply to comment #12)
> With regards to Nemo's point, the current message is completely useless.  If
> there's something sensitive in it, it makes sense not to display what caused
> it.  But at least include a "you can report this error at xxx" notice!

[offtopic] I also miss the "Please enable $wgShowExceptionDetails" part being
actual text instead of an html comment. There's a lot more errors from third
parties not sure what to do about the error then there used to be. It'd be nice
if  (not on wikimedia) that was back to not being a comment.

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #13 from Nemo  ---
(In reply to comment #12)
> With regards to Nemo's point, the current message is completely useless.  If
> there's something sensitive in it, it makes sense not to display what caused
> it.  But at least include a "you can report this error at xxx" notice!

Hmm. This could be done, perhaps. You could file a bug against MediaWiki
extensions>WikimediaMessages, maybe an override for the default message can be
added, with a link to [[mw:How to report a bug]].
A few days ago I added pointers for people searching "Fatal exception of type
MWException" on Meta and mw.o.

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Philosopher  changed:

   What|Removed |Added

 CC||wiki.philosop...@gmail.com

--- Comment #12 from Philosopher  ---
With regards to Nemo's point, the current message is completely useless.  If
there's something sensitive in it, it makes sense not to display what caused
it.  But at least include a "you can report this error at xxx" notice!

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

MZMcBride  changed:

   What|Removed |Added

 CC||b...@mzmcbride.com

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Bartosz Dziewoński  changed:

   What|Removed |Added

 Blocks|38566   |

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Max Semenik  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 CC||maxsem.w...@gmail.com
 Resolution|--- |WONTFIX

--- Comment #11 from Max Semenik  ---
With all due respect, I've just seen MySQL credentials in exception backtrace.
While this problem can be alleviated by setting $wgShowDBErrorBacktrace to
false, it will not help for non-DBError exceptions that might still contain DB
initialization in their backtraces.

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #10 from Nemo  2012-11-20 16:22:20 UTC ---
(In reply to comment #8)
> (In reply to comment #7)
> > (In reply to comment #6)
> > > +5 billion. Getting the info from a sysadmin in some cases is more work 
> > > then
> > > fixing the issue. Its also important to have this info to triage bugs.
> > 
> > The only useful case may be when a developer without op access can see the
> > backtrace the bug may be fixed immediately.
> 
> Well that's a main one for sure (And the one that most directly applies to 
> me).
> However there's other. User's can figure out if their issue is already filed 
> or
> not based on the error message received. Sometimes the report with just the 
> hex
> number lingers too long to make it easy to retrieve (Example: bug 39336 
> comment
> 4)

Does this really still need to be proved? It's quite obvious that the error
messages without error messages and just with codes are useless; it's only
slightly better than not showing any error and just relying on the sysadmins to
carefully skim the logs, or on the users to provide precise timestamps (which
is by the way what most websites do, and they're all broken or – I guess – they
have much more people reading the logs).

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

[bugzilla-daemon]

https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Brad Jorsch  changed:

   What|Removed |Added

 CC||bjor...@wikimedia.org

--- Comment #9 from Brad Jorsch  2012-11-20 16:18:41 UTC 
---
(In reply to comment #5)
> Was this really neccessary? Are the exception details somehow sensitive
> (showing private information or something)?

They can, yes. See for example bug 7096. The documentation for
$wgShowExceptionDetails ([[mw:Manual:$wgShowExceptionDetails]]) also mentions
this.

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #8 from Bawolff  2012-11-20 16:15:22 UTC ---
(In reply to comment #7)
> (In reply to comment #6)
> > +5 billion. Getting the info from a sysadmin in some cases is more work then
> > fixing the issue. Its also important to have this info to triage bugs.
> 
> The only useful case may be when a developer without op access can see the
> backtrace the bug may be fixed immediately.

Well that's a main one for sure (And the one that most directly applies to me).
However there's other. User's can figure out if their issue is already filed or
not based on the error message received. Sometimes the report with just the hex
number lingers too long to make it easy to retrieve (Example: bug 39336 comment
4)

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #7 from Liangent  2012-11-20 16:10:23 UTC ---
(In reply to comment #6)
> +5 billion. Getting the info from a sysadmin in some cases is more work then
> fixing the issue. Its also important to have this info to triage bugs.

The only useful case may be when a developer without op access can see the
backtrace the bug may be fixed immediately.

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #6 from Bawolff  2012-11-20 16:05:25 UTC ---
(In reply to comment #5)
> This change was committed to Gerrit in
> Ieace3cd6d57b56559555ae0f1e6ec130e5d25c85 (“Updated config files per current
> usage”), changing
>  'default' => true, // fixme: log things instead
> to
>  'default' => false,
> 
> Was this really neccessary? Are the exception details somehow sensitive
> (showing private information or something)? Or is it just about
> user-friendliness (well, a fatal exception is hardly user-friendly)? Couldn’t
> we just hide the exception details under a “click for technical details”, or
> even into an HTML comment?
> 
> You know, on a public _wiki_ running on open-source software, I might want to
> diagnose the problem a bit myself, rather than just posting a hexnumber to
> Bugzilla and waiting for someone with shell access to look it up in the server
> logs…

+5 billion. Getting the info from a sysadmin in some cases is more work then
fixing the issue. Its also important to have this info to triage bugs.

>Are the exception details somehow sensitive
> (showing private information or something)?

There was. My understanding is that issue has been fixed. (Exceptions in
password related code was showing passwords)

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #5 from Mormegil  2012-11-20 10:00:07 UTC ---
This change was committed to Gerrit in
Ieace3cd6d57b56559555ae0f1e6ec130e5d25c85 (“Updated config files per current
usage”), changing
 'default' => true, // fixme: log things instead
to
 'default' => false,

Was this really neccessary? Are the exception details somehow sensitive
(showing private information or something)? Or is it just about
user-friendliness (well, a fatal exception is hardly user-friendly)? Couldn’t
we just hide the exception details under a “click for technical details”, or
even into an HTML comment?

You know, on a public _wiki_ running on open-source software, I might want to
diagnose the problem a bit myself, rather than just posting a hexnumber to
Bugzilla and waiting for someone with shell access to look it up in the server
logs…

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

--- Comment #4 from Sam Reed (reedy)  2012-10-24 18:52:38 
UTC ---
(In reply to comment #3)
> (In reply to comment #0)
> > Logged 3 bugs as blocked by this issue due to the naff error information -
> > "Fatal exception of type MWException"
> Do the error messages contain an ID string that looks like [2f5ca212] ? If so,
> you can ask a sysadmin to look up the exception message and backtrace in the
> logs.

Yes http://i50.tinypic.com/1zfk1va.png

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Roan Kattouw  changed:

   What|Removed |Added

 CC||roan.katt...@gmail.com

--- Comment #3 from Roan Kattouw  2012-10-24 18:50:43 
UTC ---
(In reply to comment #0)
> Logged 3 bugs as blocked by this issue due to the naff error information -
> "Fatal exception of type MWException"
Do the error messages contain an ID string that looks like [2f5ca212] ? If so,
you can ask a sysadmin to look up the exception message and backtrace in the
logs.

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Bartosz Dziewoński  changed:

   What|Removed |Added

 CC||matma@gmail.com
   Severity|normal  |major

--- Comment #2 from Bartosz Dziewoński  2012-10-24 
18:48:21 UTC ---
Boldly bumping to major. This seriously hinders debugging of ContentHandler
stuff right now.

Is this as simple as a one-line config change?

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Sam Reed (reedy)  changed:

   What|Removed |Added

 Blocks||41258

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Nemo_bis  changed:

   What|Removed |Added

 CC||federicol...@tiscali.it
 Blocks||24675, 38600, 36739, 38566

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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mybugs.m...@gmail.com changed:

   What|Removed |Added

 Blocks||39336

Nemo_bis  changed:

   What|Removed |Added

 Blocks||37364

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Bawolff  changed:

   What|Removed |Added

 CC||bawolff...@gmail.com

--- Comment #1 from Bawolff  2012-07-03 00:57:47 UTC ---
HTML comment seems to indicate it was a config change. It says:

Set $wgShowExceptionDetails = true; at the bottom of LocalSettings.php to show
detailed debugging information.

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[Bug 38095] Error handling information reduced: "Fatal exception of type MWException" is somewhat useless

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https://bugzilla.wikimedia.org/show_bug.cgi?id=38095

Sam Reed (reedy)  changed:

   What|Removed |Added

Summary|Error handling information  |Error handling information
   |reduced: "Fatal exception   |reduced: "Fatal exception
   |of type MWException"|of type MWException" is
   ||somewhat useless

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