[Building Sakai] Samigo NPE on group assessment

Wed Jun 4 09:05:28 PDT 2014

Well, I guess I spoke too soon!  The instructor managed to produce the 
same problem again this morning by trying to do the same thing (publish 
a quiz to a group of 3 students).  As soon as she published, Samigo 
crashes with a NPE in her site whenever anyone tries to access it.

I fixed it manually in the database again by changing "Selected Groups" 
to the site name in SAM_PUBLISHEDACESSCONTROL_T, like yesterday.  Oddly 
enough, when we looked at the quiz settings in Pending Assessments, no 
group was selected (it definitely was before the publication).  Then, 
when she selected the same group again, the quiz refused to publish, 
instructing her to select a group!

Can anyone tell me in the database where the selected groups for a quiz 
are stored?  Has anyone seen this problem consistently in one course 
site?  We've never seen it before at all!

I'm worried that even adding the null check will not fix the underlying 
issue of the groups no longer working despite still being visible in the 
interface.

<http://www.hec.ca>

Curtis Van Osch
Analyste-Programmeur
Service de développement de systèmes d'information
hec.ca <http://www.hec.ca>
Agréments 	
3000, chemin de la Côte-Sainte-Catherine, Montréal (Québec) H3T 2A7
Téléphone : 514 340-6000, poste 2029

recyclez 		
Pensons à l'environnement
avant d'imprimer

Curtis Van-Osch a écrit :
> It worked!  Thanks so much!
>
> Although I tried deleting a group that had an assessment published to 
> it and didn't have the same issue.  Must be a little more to it than 
> that.  Anyway, we'll be testing that patch and probably deploying it 
> this week to avoid this in the future, regardless of whatever the 
> cause was.
>
> <http://www.hec.ca>
> 	
> Curtis Van Osch
> Analyste-Programmeur
> Service de développement de systèmes d'information
> hec.ca <http://www.hec.ca>
> Agréments 	
> 3000, chemin de la Côte-Sainte-Catherine, Montréal (Québec) H3T 2A7
> Téléphone : 514 340-6000, poste 2029
>
> 	
> recyclez 		
> Pensons à l'environnement
> avant d'imprimer
>
> -------- Message original --------
> Sujet: Re: [Building Sakai] Samigo NPE on group assessment
> De : Paul Lukasewych <plukasew at uwo.ca>
> Pour : sakai-dev at collab.sakaiproject.org
> Copie à : Curtis Van-Osch <curtis.van-osch at hec.ca>
> Date : 2014-06-03 14:04
>> Something like this can happen when a group is deleted and therefore the test
>> has no valid groups assigned to it. Usually the remedy is to switch the test
>> to be released to the whole site, with something like this:
>>
>> UPDATE sam_publishedaccesscontrol_t SET releaseto = '##site name##' WHERE
>> assessmentid = ##publishedassessment_id##
>>
>> Paul Lukasewych
>> Applications Development Team
>> Information Technology Services
>> Support Services Building
>> Western University
>> (519) 661-2111 x80513
>> plukasew at uwo.ca
>>
>> On June 3, 2014 13:52:14 Curtis Van-Osch wrote:
>>> Hi,
>>> One of our sites' Samigo data appears to have become corrupted somehow.
>>> The user says this occured after she tried to publish a quiz to a group
>>> of one student to retake the assessment.
>>> In the logs I see a NullPointerException whenever the site is accessed
>>> (stack trace below).  It looks like SAM-2283
>>> <https://jira.sakaiproject.org/browse/SAM-2283>  would fix the issue
>>> (check PublishedAssessmentSettingsBean.getGroupsAuthorized() for null
>>> before trying to find it's length for the loop).
>>>
>>> Does anyone know how it could have gotten to this state, and whether I
>>> could fix it manually in the database?  It looks like there are no
>>> groups authorized to take the quiz.  I tried adding a line to
>>> SAM_AUTHZDATA_T with FUNCTIONID = 'TAKE_PUBLISHED_ASSESSMENT' and
>>> QUALIFIERID = <the quiz id> and AGENTID = <id of a group in the site> to
>>> no avail.
>>>
>>> Thanks,
>>> Curtis.
>
>
>
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