[Yanel-dev] Yarep.addMember() issue : be aware

[Michael Wechner]

Hi Balz

Thanks very much for pointing this out in such great detail.

Generally I agree, but need to have a closer look at it and discuss it a 
bit further.
Also re scalability, because I am currently struggling with a case 
having a group with millions of users,
and the current "one-file" based implementation just doesn't scale 
anyway in such a case and hence I was considering to
refactor the implementation anyway and which should also solve the 
write/update problem which you describe.

Thanks

Michael

Am 21.02.12 11:34, schrieb basZero:
> dear all,
>
> we had a dramatic incident last evening, one of the group.xmls got 
> corrupted by two parallel requests doing exactly the same thing.
>
> I described the whole use case and solution propsal including a 
> workaround here:
> https://github.com/wyona/security/issues/1
>
> This is just to let Yanel customers know that highly multi-threaded 
> realms should be aware that most Yarep-Methods are not 
> multi-threadable and must be synchronized in the realm's code.
>
> The code proposal to solve it is included in the issue description above.
> If really needed, I can also create a pull request for this. But I 
> think the idea is clear how to fix it.
>
> Cheers
> Balz
>
>
>

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