Nothing being logged

[Dick Visser]

I know this sounds like a beginner issue but I can't figure out what I'm doing wrong.

I'm trying to upgrade some of my SSP installs by moving them from an older Ubuntu VM to a new one, 16.04.

This new one has PHP7 and Apache 2.4.18, and SSP 1.14.6.

The problem I'm having is that something things don't work and I get a blank page.

But no matter what I try I can't get the actual error to log anywhere.

After some trying it looks like the try/catch blocks don't seem to be doing much.

Whatever fails in the try block doesn't get caught. At least no errors - just a blank page.

Manually doing SimpleSAML_Logger::info works so that's ok.

Any ideas?

--

Dick Visser
Sr. System & Network Engineer
GÉANT

Want to join us? We're hiring: http://www.geant.org/jobs

[Jeffrey Krug]

Lots of time php errors end up in the httpd error logs when the webpage is just a blank page. I would definitely recommend checking those error logs if you have not. 

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[Dick Visser]

Apache is already set to log at trace1 level but no sign of php errors there either.

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[Dick Visser]

​I did some more searching and came across this statement in www/_includes.php:

    if ($errno & SimpleSAML_Utilities::$logMask || !($errno & error_reporting())) {

        // masked error

        return false;

    }

​After removing this my error started appearing in the logs:

Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] SimpleSAML_Error_Exception: Error 0 - Class 'sspmod_oauth_Consumer' not found

Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] Backtrace:

Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] 2 /opt/simplesamlphp/bridge-1.14.6/www/_include.php:83 (SimpleSAML_error_handler)

Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] 1 /opt/simplesamlphp/bridge-1.14.6/www/_include.php:51 (SimpleSAML_exception_handler)

Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] 0 [builtin] (N/A)

​

As can be seen the 'errno' is 0 - which is why the error was masked by the statement (errno = 0 and ​SimpleSAML_Utilities::$logMask =0 as well).

I checked a load of old log files and the usual values for 'errno' that we encountered were 2 or 8.

If these are numbers that map to the ones on http://php.net/manual/en/errorfunc.constants.php, then I wonder what errno 0 means because that is not listed.

Maybe a bug in PHP?

In any case I will strip out that statement in www/_include.php so I can see what's happening.

DIck

[Jaime Perez Crespo]

Hi Dick!

That sounds like a bug indeed.

As far as I can see, the OAuth module does not use error masking (at least, not the version I have here), so I’d assume this is probably PHP configuration. If you go to your php.ini, what do you have in the “error_reporting” configuration directive?

On 11 Aug 2016, at 10:09 AM, Dick Visser <dick....@geant.org> wrote:
> ​I did some more searching and came across this statement in www/_includes.php:
>
> if ($errno & SimpleSAML_Utilities::$logMask || !($errno & error_reporting())) {
> // masked error
> return false;
> }
>
> ​After removing this my error started appearing in the logs:
>
> Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] SimpleSAML_Error_Exception: Error 0 - Class 'sspmod_oauth_Consumer' not found
> Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] Backtrace:
> Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] 2 /opt/simplesamlphp/bridge-1.14.6/www/_include.php:83 (SimpleSAML_error_handler)
> Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] 1 /opt/simplesamlphp/bridge-1.14.6/www/_include.php:51 (SimpleSAML_exception_handler)
> Aug 11 09:37:00 simplesamlphp.bridge ERROR [bef181fb68] 0 [builtin] (N/A)
> ​
> As can be seen the 'errno' is 0 - which is why the error was masked by the statement (errno = 0 and ​SimpleSAML_Utilities::$logMask =0 as well).
>
> I checked a load of old log files and the usual values for 'errno' that we encountered were 2 or 8.
> If these are numbers that map to the ones on http://php.net/manual/en/errorfunc.constants.php, then I wonder what errno 0 means because that is not listed.
> Maybe a bug in PHP?
>
> In any case I will strip out that statement in www/_include.php so I can see what's happening.

--
Jaime Pérez
UNINETT / Feide
mail: jaime...@uninett.no
PGP: 9A08 EA20 E062 70B4 616B 43E3 562A FE3A 6293 62C2

"Two roads diverged in a wood, and I, I took the one less traveled by, and that has made all the difference."
- Robert Frost

[Dick Visser]

On Thu, Aug 11, 2016 at 10:21 AM, Jaime Perez Crespo
<jaime...@uninett.no> wrote:
> Hi Dick!
>
> That sounds like a bug indeed.
>
> As far as I can see, the OAuth module does not use error masking (at least, not the version I have here), so I’d assume this is probably PHP configuration. If you go to your php.ini, what do you have in the “error_reporting” configuration directive?

It's set to E_ALL.
phpinfo():

error_reporting 32767 32767

Could it be that it's not limited to the OAuth module? I remember
having trouble seeing errors with another instance as well.

Dick

[Jaime Perez Crespo]

Hi!

On 11 Aug 2016, at 12:50 PM, Dick Visser <dick....@geant.org> wrote:
> It's set to E_ALL.
> phpinfo():
>
> error_reporting 32767 32767

Can you try E_ALL & E_STRICT?

[Dick Visser]

On Thu, Aug 11, 2016 at 1:33 PM, Jaime Perez Crespo
<jaime...@uninett.no> wrote:
> Hi!
>
> On 11 Aug 2016, at 12:50 PM, Dick Visser <dick....@geant.org> wrote:
>> It's set to E_ALL.
>> phpinfo():
>>
>> error_reporting 32767 32767
>
> Can you try E_ALL & E_STRICT?

Yes, same results.
Which is expected, as per php.ini comment (and I'm on 7.0.9):

; Error Level Constants:
; E_ALL - All errors and warnings (includes E_STRICT as of
PHP 5.4.0)

[Jaime Perez Crespo]

Oh, that’s true, I must have been looking at an older version of the documentation.

In that case, I honestly have no idea why you were getting such errno. I’m tempted to think you are right and that was a bug in PHP...

On 11 Aug 2016, at 14:26 PM, Dick Visser <dick....@geant.org> wrote:
> On Thu, Aug 11, 2016 at 1:33 PM, Jaime Perez Crespo
>>

>> Can you try E_ALL & E_STRICT?
>
> Yes, same results.
> Which is expected, as per php.ini comment (and I'm on 7.0.9):
>
> ; Error Level Constants:
> ; E_ALL - All errors and warnings (includes E_STRICT as of
> PHP 5.4.0)

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