I just looked at the image and there were bunch of processes hung up on one
or another of two critical blocks; although it did not appear that either
was part of the call stack of the other.

One of them was using a Semaphore instead of a Mutex, so that is suspicious.

There were so many, it wasn't evident what the root cause of the issue was,
so I decided to bounce the server and will monitor it over the next days to
see if the issue returns.



On Fri, Dec 30, 2016 at 2:34 AM, Fabio Niephaus <lists at fniephaus.com> wrote:

> On Fri, Dec 30, 2016 at 12:18 AM Chris Muller <asqueaker at gmail.com> wrote:
>
>> Appears there is a problem accessing one of the MCVersions --
>> #versionNamed: returned nil, but the calling code didn't expect that.
>>
>> Very helpful would be to know what version it failed on..
>>
>>
> Yes, that'd be helpful. But I'm afraid we only have a call stack at the
> moment. Interestingly, the error only seems to occur occasionally, so maybe
> we need one more retry somewhere in the updater? Obviously, the updater
> needs to be as bullet proof as possible, because it's used to build new
> trunk images.
>
>
>>
>> On Tue, Dec 27, 2016 at 12:35 PM, Fabio Niephaus <lists at fniephaus.com>
>> wrote:
>>
>> Trunk builds are failing because of:
>>
>> UndefinedObject(Object)>>doesNotUnderstand: #dependencies MCMcmUpdater>>updateFromConfig:
>> [] in [] in [] in MCMcmUpdater>>updateFromRepository:
>> ...
>>
>> See https://travis-ci.org/squeak-smalltalk/squeak-app/jobs/186982813#L79
>>
>> --
>>
>> On Tue, Dec 27, 2016 at 4:45 PM Travis CI <builds at travis-ci.org> wrote:
>>
>> *squeak-smalltalk / squeak-app
>> <https://travis-ci.org/squeak-smalltalk/squeak-app>* (master
>> <https://github.com/squeak-smalltalk/squeak-app/tree/master>)
>> Build #320 was broken.
>> <https://travis-ci.org/squeak-smalltalk/squeak-app/builds/186982810>
>> 14 minutes and 20 seconds
>> *Fabio Niephaus* 87356bd
>> <https://github.com/squeak-smalltalk/squeak-app/commit/87356bd88d61872872f9aebfc757109dee512018> Changeset
>> →
>> <https://github.com/squeak-smalltalk/squeak-app/compare/867efa13c3594f99e9edacdc23b66ae27048201c...87356bd88d61872872f9aebfc757109dee512018>
>>   Exclude SqueakSSLTest
>>
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>>
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