[erlang-questions] {aborted,nomore} from mnesia

[Park, Sungjin]

Great thanks!



On Wed, Jul 17, 2013 at 7:36 PM, Håkan Mattsson <hm@REDACTED> wrote:

> When Mnesia detects that your transaction have run into a potential
> deadlock, it may restart your transaction. By default there is no
> restart limit. But you have explicitly configured Mnesia to only allow
> a certain number of restarts. When that limit is reached, the
> transaction will be aborted with 'nomore' as reason.
>
> /Håkan
>
> On Wed, Jul 17, 2013 at 11:06 AM, Park, Sungjin <jinni.park@REDACTED>
> wrote:
> > Following is my code to use mnesia and I get {aborted,nomore} sometimes.
> > What would be the reason?
> >
> > up(Name, Module) ->
> >
> >   Pid = self(),
> >
> >   Route = #?MODULE{name=Name, addr=Pid, module=Module},
> >
> >   F = fun() ->
> >
> >     case mnesia:wread({?MODULE, Name}) of
> >
> >       [#?MODULE{name=Name, addr=Pid, module=Module}] ->
> >
> >         ok;
> >
> >       [#?MODULE{name=Name, addr=undefined, module=Module}] ->
> >
> >         mnesia:write(Route);
> >
> >       [#?MODULE{name=Name, addr=Addr, module=Module}] ->
> >
> >         exit(Addr, kill),
> >
> >         mnesia:write(Route);
> >
> >       [#?MODULE{name=Name}] ->
> >
> >         {error, collision};
> >
> >       [] ->
> >
> >         mnesia:write(Route);
> >
> >       Error ->
> >
> >         {error, Error}
> >
> >     end
> >
> >   end,
> >
> >   case mnesia:transaction(F, ?MNESIA_TRANSACTION) of
> >
> >     {atomic, Result} -> Result;
> >
> >     Aborted -> Aborted
> >
> >   end.
> >
> >
> > --
> > Park, Sungjin
> >
> -------------------------------------------------------------------------------------------------------------------
> > Peculiar travel suggestions are dancing lessons from god.
> >   -- The Books of Bokonon
> >
> -------------------------------------------------------------------------------------------------------------------
> >
> > _______________________________________________
> > erlang-questions mailing list
> > erlang-questions@REDACTED
> > http://erlang.org/mailman/listinfo/erlang-questions
> >
>



-- 
Park, Sungjin
-------------------------------------------------------------------------------------------------------------------
Peculiar travel suggestions are dancing lessons from god.
  -- The Books of Bokonon
-------------------------------------------------------------------------------------------------------------------
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