[erlang-bugs] ets deadlock only with write_concurrency?

Sverker Eriksson <>
Mon Oct 31 12:05:01 CET 2011

Jonas Boberg wrote:
> Hi,
> >From the release notes for R14B04:
> ---
> OTP-9423  Fix emulator deadlock in ets:delete on tables with write_concurrency
>               caused by race with concurrent process that tries to do
>               other operation on the same table. Does not apply to ordered_set.
>               Bug exist since R14B.
> ---
> Is there any remote possibility that this issue could affect tables
> without the 'write_concurrency' option set to true?
> We are experiencing something that looks like an ets deadlock with
> R14B03, but we don't have any tables with write_concurrency, only
> read_concurrency.
Not any known "remote possibility". No.
The bug as we saw and understood it needed write_concurrency to trigger.

/Sverker, Erlang/OTP

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