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authorMikael Pettersson <[email protected]>2015-05-31 11:38:41 +0200
committerMikael Pettersson <[email protected]>2015-05-31 11:38:41 +0200
commit7a2da8a21c947503591b19c9ec2a262b7b2fb581 (patch)
tree9b0914729167c57600bad31da3affaa56d7ba154 /lib/mnesia
parentefbfe9602983ff451b864e557bdf3733222b78ba (diff)
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mnesia: don't delete log file on emfile error
If the VM runs into the process' file descriptor limit when mnesia tries to open (not create) a disk_log file, the open fails with an emfile error. Mnesia misinterprets this as a corrupt file, deletes it, tries to create a new empty disk_log file, which also fails. The end result is a corrupt database on disk. Check for emfile errors and error out immediately without deleting the file in those cases.
Diffstat (limited to 'lib/mnesia')
-rw-r--r--lib/mnesia/src/mnesia_log.erl2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/mnesia/src/mnesia_log.erl b/lib/mnesia/src/mnesia_log.erl
index d2fd04a60b..eda6be4e25 100644
--- a/lib/mnesia/src/mnesia_log.erl
+++ b/lib/mnesia/src/mnesia_log.erl
@@ -349,6 +349,8 @@ open_log(Name, Header, Fname, Exists, Repair, Mode) ->
mnesia_lib:important("Data may be missing, log ~p repaired: Lost ~p bytes~n",
[Fname, BadBytes]),
Log;
+ {error, Reason = {file_error, _Fname, emfile}} ->
+ fatal("Cannot open log file ~p: ~p~n", [Fname, Reason]);
{error, Reason} when Repair == true ->
file:delete(Fname),
mnesia_lib:important("Data may be missing, Corrupt logfile deleted: ~p, ~p ~n",