[BUG] Inspite of disabling the redis persistance both AOF and RDB, RDB is loading keys of diffrent master leading to keys importing

[sreenivasvp]

Inspite of disabling the redis persistance both AOF and RDB, RDB is loading keys of diffrent master leading to keys importing
Our redis configuration details :
***** Redis Configuration details *****

cluster-node-timeout 60000
cluster-slave-validity-factor 3
cluster-allow-reads-when-down no
appendonly no
save ""
cluster-enabled yes
cluster-config-file nodes-redis.conf
dir /var/lib/redis
protected-mode no

We see that nodes.conf
***** nodes-redis.conf details *****
ef1d9da0aee94b41ae4bfe17c5b8c2e22527fd35 10.192.210.19:6379@16379 myself,master - 0 1646379500000 8 connected 5461-10922

While bootup, we see -> Done loading RDB, keys loaded: 2, keys expired: 0.
Keys are from diffferrnt master leading to slot importing
15:M 17 Mar 2022 22:57:16.512 # I have keys for slot 11794, but the slot is assigned to another node. Setting it to importing state.
15:M 17 Mar 2022 22:57:16.512 # I have keys for slot 13796, but the slot is assigned to another node. Setting it to importing state.

Snippet of boot log :

Starting redis server

15:C 17 Mar 2022 22:57:16.498 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
15:C 17 Mar 2022 22:57:16.498 # Redis version=6.2.6, bits=64, commit=00000000, modified=0, pid=15, just started
15:C 17 Mar 2022 22:57:16.498 # Configuration loaded
15:M 17 Mar 2022 22:57:16.499 * monotonic clock: POSIX clock_gettime
15:M 17 Mar 2022 22:57:16.507 * Node configuration loaded, I'm ef1d9da0aee94b41ae4bfe17c5b8c2e22527fd35
15:M 17 Mar 2022 22:57:16.508 * Running mode=cluster, port=6379.
15:M 17 Mar 2022 22:57:16.508 # Server initialized
15:M 17 Mar 2022 22:57:16.512 * Loading RDB produced by version 6.2.6
15:M 17 Mar 2022 22:57:16.512 * RDB age 1178334 seconds
15:M 17 Mar 2022 22:57:16.512 * RDB memory usage when created 8.17 Mb
15:M 17 Mar 2022 22:57:16.512 # Done loading RDB, keys loaded: 2, keys expired: 0.
15:M 17 Mar 2022 22:57:16.512 * DB loaded from disk: 0.003 seconds
15:M 17 Mar 2022 22:57:16.512 # I have keys for slot 11794, but the slot is assigned to another node. Setting it to importing state.
15:M 17 Mar 2022 22:57:16.512 # I have keys for slot 13796, but the slot is assigned to another node. Setting it to importing state.

[sreenivasvp]

@madolson @oranagra
Please help on the same..

[oranagra]

@sreenivasvp on startup, redis loads data from the rdb file referred to by the dbfilename config, even if save is disabled.
so maybe you just need to delete the file...

[sreenivasvp]

@oranagra
The startup that I am referring to is master pod/node restarted on running cluster and that pod/node is comming back.

rdb is always read at boot only is it ??

[oranagra]

yes, rdb is always loaded at boot time if exists. and the only other place it can be loaded is when a replica connects to a master.
please wait for @madolson to respond regarding the cluster configuration and importing state.

[sreenivasvp]

@oranagra
The reason I asked rdb is always read at boot only is it ?? is :
I was thinking, to delete the rdb file on each bootup irrespective of master/slave when it comes-up/starts back, so as to avoid issues from cluster getting corrupted / down.

Sure will wait for @madolson wrt cluster configuration and importing state.

[sreenivasvp]

@oranagra
Any inputs on below please :
Thinking, to delete the rdb file on each bootup irrespective of master/slave when it comes-up/starts back, so as to avoid issues from cluster getting corrupted / down.

[markrity]

I had the same issue, tried everything to make it stop writing to dump.rdb.

The solution was to use add to config file this line:

save ""

Worked like magic.

Also from what I have seen that problem happens only on version 6 and 7, on Redis 4 , it works without it, only commenting #save out disables the writes to dump.rdb .

Have not tested Redis 5.