“Redis is configured to save RDB snapshots” error, not related to permissions / memory / disk space

3
votes

I am getting the following Redis error:

MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk.

It is not permissions related, though, since it only starts occurring a certain time after reboot (most recent occurrence was about a day after reboot). When it occurs, the server has more than enough memory and disk space. Any suggestions? Thanks.

Edit: The Redis logs shows this when saving properly:

[2354] 13 Nov 09:56:16.071 * 10 changes in 300 seconds. Saving...

[2354] 13 Nov 09:56:16.072 * Background saving started by pid 2194

[2194] 13 Nov 09:56:16.118 * DB saved on disk

[2194] 13 Nov 09:56:16.118 * RDB: 0 MB of memory used by copy-on-write

[2354] 13 Nov 09:56:16.172 * Background saving terminated with success

and this when the error occurs:

[2355] 13 Nov 09:15:12.069 * 1 changes in 900 seconds. Saving...

[2355] 13 Nov 09:15:12.070 * Background saving started by pid 27899

[27899] 13 Nov 09:15:12.074 # Error moving temp DB file on the final destination: Is a directory

[2355] 13 Nov 09:15:12.170 # Background saving error

1
redisresque
Are you sure there's no other information in the logs? – hobbs
Log info added to the original question. – modulaaron
I have checked Related also and haven't found a match yet, as most are related to permissions, memory, or disk space. – modulaaron
Does this problem occur after executing this command echo 1 > /proc/sys/vm/overcommit_memory – bluesman
Possible duplicate of MISCONF Redis is configured to save RDB snapshots – Niloct

1 Answers

5
votes

We had this same problem, and it turned out someone had "cracked" our server and changed the temp DB path to ".ssh" and the filename to "authorized_keys". We used the following commands in the redis CLI to change those:

CONFIG SET dir /original/tmp/directory
CONFIG SET dbfilename temp.rdb

Hope this helps!