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authorErlang/OTP <[email protected]>2017-01-31 15:08:36 +0100
committerErlang/OTP <[email protected]>2017-01-31 15:08:36 +0100
commitb674eaa8c616a341bec19254e6b3f04cecc2a2f1 (patch)
tree1980d806b64e45f996f7188116b75ebf7550c98d
parentbca5bf5a2d68a0e9ca681363a8943809c4751950 (diff)
parent230358701da9764fa4c637e9e781668276f14938 (diff)
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Merge branch 'dgud/mnesia/checkpoint-crash/OTP-14167' into maint-19
* dgud/mnesia/checkpoint-crash/OTP-14167: Fixed crash when a table was deleted during checkpoint traversal
-rw-r--r--lib/mnesia/src/mnesia_checkpoint.erl7
-rw-r--r--lib/mnesia/src/mnesia_event.erl3
-rw-r--r--lib/mnesia/test/mnesia_evil_backup.erl43
3 files changed, 38 insertions, 15 deletions
diff --git a/lib/mnesia/src/mnesia_checkpoint.erl b/lib/mnesia/src/mnesia_checkpoint.erl
index 9eb939e8d3..fc626940b4 100644
--- a/lib/mnesia/src/mnesia_checkpoint.erl
+++ b/lib/mnesia/src/mnesia_checkpoint.erl
@@ -909,7 +909,7 @@ retainer_loop(Cp = #checkpoint_args{name=Name}) ->
retainer_loop(Cp2);
{From, {iter_end, Iter}} ->
- retainer_fixtable(Iter#iter.oid_tab, false),
+ ?SAFE(retainer_fixtable(Iter#iter.oid_tab, false)),
Iters = Cp#checkpoint_args.iterators -- [Iter],
reply(From, Name, ok),
retainer_loop(Cp#checkpoint_args{iterators = Iters});
@@ -971,7 +971,8 @@ do_stop(Cp) ->
unset({checkpoint, Name}),
lists:foreach(fun deactivate_tab/1, Cp#checkpoint_args.retainers),
Iters = Cp#checkpoint_args.iterators,
- lists:foreach(fun(I) -> retainer_fixtable(I#iter.oid_tab, false) end, Iters).
+ [?SAFE(retainer_fixtable(Tab, false)) || #iter{main_tab=Tab} <- Iters],
+ ok.
deactivate_tab(R) ->
Name = R#retainer.cp_name,
@@ -1151,7 +1152,7 @@ do_change_copy(Cp, Tab, FromType, ToType) ->
Cp#checkpoint_args{retainers = Rs, nodes = writers(Rs)}.
check_iter(From, Iter) when Iter#iter.pid == From ->
- retainer_fixtable(Iter#iter.oid_tab, false),
+ ?SAFE(retainer_fixtable(Iter#iter.oid_tab, false)),
false;
check_iter(_From, _Iter) ->
true.
diff --git a/lib/mnesia/src/mnesia_event.erl b/lib/mnesia/src/mnesia_event.erl
index 7320d381ea..6f7531245f 100644
--- a/lib/mnesia/src/mnesia_event.erl
+++ b/lib/mnesia/src/mnesia_event.erl
@@ -114,7 +114,8 @@ handle_table_event({Oper, Record, TransId}, State) ->
handle_system_event({mnesia_checkpoint_activated, _Checkpoint}, State) ->
{ok, State};
-handle_system_event({mnesia_checkpoint_deactivated, _Checkpoint}, State) ->
+handle_system_event({mnesia_checkpoint_deactivated, Checkpoint}, State) ->
+ report_error("Checkpoint '~p' has been deactivated, last table copy deleted.\n",[Checkpoint]),
{ok, State};
handle_system_event({mnesia_up, Node}, State) ->
diff --git a/lib/mnesia/test/mnesia_evil_backup.erl b/lib/mnesia/test/mnesia_evil_backup.erl
index e745ec9b04..044cf501fd 100644
--- a/lib/mnesia/test/mnesia_evil_backup.erl
+++ b/lib/mnesia/test/mnesia_evil_backup.erl
@@ -723,18 +723,18 @@ bup_records(File, Mod) ->
exit(Reason)
end.
-sops_with_checkpoint(doc) ->
+sops_with_checkpoint(doc) ->
["Test schema operations during a checkpoint"];
sops_with_checkpoint(suite) -> [];
sops_with_checkpoint(Config) when is_list(Config) ->
- Ns = ?acquire_nodes(2, Config),
-
+ Ns = [N1,N2] = ?acquire_nodes(2, Config),
+
?match({ok, cp1, Ns}, mnesia:activate_checkpoint([{name, cp1},{max,mnesia:system_info(tables)}])),
- Tab = tab,
+ Tab = tab,
?match({atomic, ok}, mnesia:create_table(Tab, [{disc_copies,Ns}])),
OldRecs = [{Tab, K, -K} || K <- lists:seq(1, 5)],
[mnesia:dirty_write(R) || R <- OldRecs],
-
+
?match({ok, cp2, Ns}, mnesia:activate_checkpoint([{name, cp2},{max,mnesia:system_info(tables)}])),
File1 = "cp1_delete_me.BUP",
?match(ok, mnesia:dirty_write({Tab,6,-6})),
@@ -742,16 +742,16 @@ sops_with_checkpoint(Config) when is_list(Config) ->
?match(ok, mnesia:dirty_write({Tab,7,-7})),
File2 = "cp2_delete_me.BUP",
?match(ok, mnesia:backup_checkpoint(cp2, File2)),
-
+
?match(ok, mnesia:deactivate_checkpoint(cp1)),
?match(ok, mnesia:backup_checkpoint(cp2, File1)),
?match(ok, mnesia:dirty_write({Tab,8,-8})),
-
+
?match({atomic,ok}, mnesia:delete_table(Tab)),
?match({error,_}, mnesia:backup_checkpoint(cp2, File2)),
?match({'EXIT',_}, mnesia:dirty_write({Tab,9,-9})),
- ?match({atomic,_}, mnesia:restore(File1, [{default_op, recreate_tables}])),
+ ?match({atomic,_}, mnesia:restore(File1, [{default_op, recreate_tables}])),
Test = fun(N) when N > 5 -> ?error("To many records in backup ~p ~n", [N]);
(N) -> case mnesia:dirty_read(Tab,N) of
[{Tab,N,B}] when -B =:= N -> ok;
@@ -759,8 +759,29 @@ sops_with_checkpoint(Config) when is_list(Config) ->
end
end,
[Test(N) || N <- mnesia:dirty_all_keys(Tab)],
- ?match({aborted,enoent}, mnesia:restore(File2, [{default_op, recreate_tables}])),
-
+ ?match({aborted,enoent}, mnesia:restore(File2, [{default_op, recreate_tables}])),
+
+ %% Mnesia crashes when deleting a table during backup
+ ?match([], mnesia_test_lib:stop_mnesia([N2])),
+ Tab2 = ram,
+ ?match({atomic, ok}, mnesia:create_table(Tab2, [{ram_copies,[N1]}])),
+ ?match({ok, cp3, _}, mnesia:activate_checkpoint([{name, cp3},
+ {ram_overrides_dump,true},
+ {min,[Tab2]}])),
+ Write = fun Loop (N) ->
+ case N > 0 of
+ true ->
+ mnesia:dirty_write({Tab2, N+100, N+100}),
+ Loop(N-1);
+ false ->
+ ok
+ end
+ end,
+ ok = Write(100000),
+ spawn_link(fun() -> ?match({atomic, ok},mnesia:delete_table(Tab2)) end),
+
+ %% We don't check result here, depends on timing of above call
+ mnesia:backup_checkpoint(cp3, File2),
file:delete(File1), file:delete(File2),
- ?verify_mnesia(Ns, []).
+ ?verify_mnesia([N1], [N2]).