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Improve notifications about damaged I/O subsystem #768

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Improve notifications about damaged I/O subsystem #768

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18 changes: 10 additions & 8 deletions src/rabbit_log.erl
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Expand Up @@ -96,18 +96,20 @@ with_local_io(Fun) ->
Node = node(),
case node(GL) of
Node -> Fun();
_ -> set_group_leader_to_user(),
_ -> set_group_leader_to_user_safely(whereis(user)),
try
Fun()
after
group_leader(GL, self())
end
end.

set_group_leader_to_user() ->
case whereis(user) of
undefined ->
warning("the 'user' I/O process has terminated, some features will fail until Erlang VM is restarted");
User ->
group_leader(User, self())
end.
set_group_leader_to_user_safely(undefined) ->
handle_damaged_io_system();
set_group_leader_to_user_safely(User) when is_pid(User) ->
group_leader(User, self()).

handle_damaged_io_system() ->
Msg = "Erlang VM I/O system is damaged, restart needed~n",
io:format(standard_error, Msg, []),
exit(erlang_vm_restart_needed).