[Mono-dev] Regressions on 3.13.0-46-generic -> 3.13.0-48-generic

[Greg Young]

I was just actually writing that this seems to be discussed here:
https://bugzilla.xamarin.com/show_bug.cgi?id=29692 :) Thanks for the
additional information.



On Thu, Sep 17, 2015 at 1:01 PM, Taloth Saldono <talothsaldono at gmail.com> wrote:
> This Ubuntu bug discusses the issue for 3.13.
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450584
>
> Please note that later kernel 4.0 versions exhibit similar issues, search
> this mailinglist for specifics on that new regression. I gave up on
> investigating further due to other obligations and the complexity of the
> subject matter.
>
> Op 17 sep. 2015 11:49 schreef "Greg Young" <gregoryyoung1 at gmail.com>:
>>
>> 3.13.0-63-generic does not have the issue as well.
>>
>> I guess our mitigation will just be to know about the issue and
>> suggest downgrade/upgrade. This may however be useful for others in
>> the future. Mono 3.12.1 on 3.13.0-46-generic #77-Ubuntu SMP appears to
>> not be stable. We will also test mono4 now.
>>
>> Greg
>>
>> On Thu, Sep 17, 2015 at 11:38 AM, Greg Young <gregoryyoung1 at gmail.com>
>> wrote:
>> > We are running into some interesting regressions with mono. We are
>> > seeing many failures such as:
>> >
>> > Mono v3.12.1 (we have considered moving up to 4.1 or 4.2 but the last
>> > time we tested it didn't seem safe to move).
>> >
>> > Native stacktrace:
>> >
>> > /home/ubuntu/EventStore-OSS-Ubuntu-v3.2.1/eventstored() [0x609a4f]
>> > /home/ubuntu/EventStore-OSS-Ubuntu-v3.2.1/eventstored() [0x5bdecf]
>> > /home/ubuntu/EventStore-OSS-Ubuntu-v3.2.1/eventstored() [0x453b19]
>> > /lib/x86_64-linux-gnu/libpthread.so.0(+0x10340) [0x7fd9709b7340]
>> > /home/ubuntu/EventStore-OSS-Ubuntu-v3.2.1/eventstored() [0x4e6145]
>> > [0x40e21ceb]
>> >
>> >
>> > [03041,21,13:43:11.379] Global Unhandled Exception occurred.
>> > Object reference not set to an instance of an object
>> > [ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException:
>> > Object reference not set to an instance of an object
>> >   at EventStore.Core.Bus.QueuedHandlerAutoReset.ReadFromQueue
>> > (System.Object o) [0x00000] in <filename unknown>:0
>> >   at System.Threading.Thread.StartInternal () [0x00000] in <filename
>> > unknown>:0
>> >
>> > note that this isn't a real nre
>> >
>> > We do not see these regressions in Linux ip-172-31-37-60
>> > 3.13.0-46-generic #77-Ubuntu SMP
>> >
>> > We do see them in Linux ip-172-31-40-115 3.13.0-48-generic #80-Ubuntu
>> > SMP
>> >
>> > Anyone have any ideas how to debug this further? These are not
>> > deterministic issues.
>> >
>> > Cheers,
>> >
>> > Greg
>> >
>> > --
>> > Studying for the Turing test
>>
>>
>>
>> --
>> Studying for the Turing test
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-- 
Studying for the Turing test