riak crash

francisco treacy francisco.treacy at gmail.com
Mon Nov 29 14:24:57 EST 2010


Interesting.

I only ran into this issue once, but I remember what I was doing.  So
I'll try to reproduce it later tonight, and if I succeed I'll send you
more info -- to eventually pass on to the Erlang folks.

Thanks,
Francisco


2010/11/29 David Smith <dizzyd at basho.com>:
> Thanks for the info.
>
> A more careful reading of EAGAIN related messages says that:
>
> "A temporary resource shortage made an operation impossible. fork can
> return this error. It indicates that the shortage is expected to pass,
> so your program can try the call again later and it may succeed. It is
> probably a good idea to delay for a few seconds before trying it
> again, to allow time for other processes to release scarce resources.
> Such shortages are usually fairly serious and affect the whole system,
> so usually an interactive program should report the error to the user
> and return to its command loop."
>
> It looks, from the logs, like memsup was a bit aggressive in retrying
> that call and consequently exceeded the supervisor restart frequency;
> eventually this percolated up the supervisor chain and the VM was
> taken down (as it should be).
>
> That is to say, I don't see anything here that we can fix via Riak --
> it appears (based strictly on the available data) to be something
> inside the Erlang/OTP distribution. Can you easily reproduce this
> issue?
>
> Thanks,
>
> D.
>




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