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From Denis Magda <dma...@gridgain.com>
Subject Re: Ignite stops working suddenly during dev
Date Thu, 13 Jun 2019 21:56:16 GMT
Alright, the ticket is ready for contribution:
https://issues.apache.org/jira/browse/IGNITE-11919

--
Denis Magda


On Thu, Jun 13, 2019 at 2:50 PM Denis Magda <dmagda@apache.org> wrote:

> Those are details and I can't think of a generic and crystal clear message
> that covers them. Plus, don't think we should do this as long as the
> generic solution will solve the problem.
>
> -
> Denis
>
>
> On Thu, Jun 13, 2019 at 10:48 AM Mikhail Cherkasov <
> mcherkasov@gridgain.com> wrote:
>
>> *"ERROR: Type 'Person' has a different/incorrect type
>> for field 'salary'. Expected 'double' but 'string' was provided. Field
>> type's modification is unsupported, clean {root_path}/marshaller directory
>> if the type change is required."*
>>
>> it still sounds like a hack and it's not clear if it should be done on all
>> nodes or only on the node with error, should it be done for client nodes
>> too or only for server nodes?
>> Also, can it be done on a live cluster, or we need to stop or/and
>> deactivate it first?
>>
>> Thanks,
>> Mike.
>>
>> On Wed, Jun 12, 2019 at 11:34 AM Garrett Alley <
>> garrett.alley@gridgain.com>
>> wrote:
>>
>> > Denis,
>> >
>> > Minor changes to your suggestion:
>> >
>> > *"ERROR: Type 'Person' has a different/incorrect type
>> > for field 'salary'. Expected 'double' but 'string' was provided. Field
>> > type's modification is unsupported, clean {root_path}/marshaller
>> directory
>> > if the type change is required."*
>> >
>> >
>> > ===
>> >
>> > Garrett Alley
>> > Documentation
>> > GridGain Systems
>> >
>> >
>> > On Wed, Jun 12, 2019 at 11:15 AM Denis Magda <dmagda@apache.org> wrote:
>> >
>> > > Alex, Garrett,
>> > >
>> > > How about this error message?
>> > >
>> > > That's what we have know: *ERROR: Binary type has different field
>> types
>> > > [typeName=Person, fieldName=salary, fieldTypeName1=double,
>> > > fieldTypeName2=String]*
>> > >
>> > > That's how I would change it: *"Type 'Person' has different/incorrect
>> > type
>> > > for field 'salary'. Expected 'double' but 'string' was provided. Field
>> > > type's modification is unsupported, clean {root_path}/marshaller
>> > directory
>> > > if the type change is required"*
>> > >
>> > > -
>> > > Denis
>> > >
>> > >
>> > > On Thu, Jun 6, 2019 at 5:24 AM Alexey Goncharuk <
>> > > alexey.goncharuk@gmail.com>
>> > > wrote:
>> > >
>> > > > Hello Denis,
>> > > >
>> > > > As for p.1 - fully agree. For p.2 - I have some ideas to be
>> implemented
>> > > in
>> > > > the future in Ignite 3.0, will share some ideas later.
>> > > >
>> > > > чт, 6 июн. 2019 г. в 13:29, Denis Magda <dmagda@apache.org>:
>> > > >
>> > > > > Hey Igniters,
>> > > > >
>> > > > > I'd like us to brainstorm how to solve the following usability
>> issue.
>> > > > >
>> > > > > A user starts developing an app and can change the data model
via
>> a
>> > > > > configuration or DDL frequently. However, if there is an
>> incompatible
>> > > > data
>> > > > > model change like a type/field modification Ignite will fail
to
>> > restart
>> > > > or
>> > > > > begins throwing "wrong data type" exceptions.
>> > > > >
>> > > > > A solution for these scenarios is to clean the "marshaller/"
>> folder.
>> > > > Guess
>> > > > > who knows this trick? A few of us. Had to do this all the time
>> while
>> > > > baking
>> > > > > a demo for one of the recent shows and here is a good example
of
>> > users'
>> > > > > hardships:
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>> https://stackoverflow.com/questions/56384773/apache-ignite-programmatically-destroy-persistent-cache
>> > > > >
>> > > > > How do you see this needs to be addressed considering:
>> > > > >
>> > > > >    1. Current Ignite serialization format - a special message
that
>> > > > explains
>> > > > >    what to clean and where or some sort of automation?
>> > > > >    2. Future storage independent format - when binary
>> serialization
>> > > logic
>> > > > >    will be revisited. @Alex Goncharuk, please step in.
>> > > > >
>> > > > >
>> > > > > -
>> > > > > Denis
>> > > > >
>> > > >
>> > >
>> >
>>
>>
>> --
>> Thanks,
>> Mikhail.
>>
>

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