{"error":"Cannot read property '_csrf' of undefined"}

[Lingyong Zhang]

I need help....

[A Former User]

@Lingyong-Zhang check https://community.nodebb.org/topic/1509/fixed-broken-nodebb-error-cannot-read-property-_csrf-of-undefined

[Guiri]

@Lingyong-Zhang, check the output of /var/log/redis/redis.log (although your redis log may be in a different location):

sudo cat /var/log/redis/redis.log

It will likely contain an error message about either maxconnections or vm.overcommit. In the case of the former, lower the max connections in /etc/redis.conf to whatever ulimit -n gives you. In the case of the latter, you have to allow overcommitting of memory:

sudo su && echo 1 > /proc/sys/vm/overcommit_memory

See the FAQ for more info.

Last, make sure you restart Redis after you make both of these changes:

sudo service redis restart

[Lingyong Zhang]

@Guiri Yes, use the redis cost so much memery.
I checked the log, it says:

Background saving started by pid 15934

[15934] 20 May 13:35:40.071 * DB saved on disk
[15934] 20 May 13:35:40.072 * RDB: 0 MB of memory used by copy-on-write
[11419] 20 May 13:35:40.165 * Background saving terminated with success
[11419] 20 May 13:40:41.068 * 10 changes in 300 seconds. Saving...
[11419] 20 May 13:40:41.069 * Background saving started by pid 15935
[15935] 20 May 13:40:41.079 * DB saved on disk
[15935] 20 May 13:40:41.080 * RDB: 0 MB of memory used by copy-on-write
[11419] 20 May 13:40:41.169 * Background saving terminated with success
[11419] 20 May 13:45:42.038 * 10 changes in 300 seconds. Saving...
[11419] 20 May 13:45:42.038 * Background saving started by pid 15936
[15936] 20 May 13:45:42.046 * DB saved on disk
[15936] 20 May 13:45:42.047 * RDB: 0 MB of memory used by copy-on-write
[11419] 20 May 13:45:42.138 * Background saving terminated with success
[11419] 20 May 19:32:08.030 * 1 changes in 900 seconds. Saving...
[11419] 20 May 19:32:08.030 * Background saving started by pid 16309
[16309] 20 May 19:32:08.039 * DB saved on disk
[16309] 20 May 19:32:08.040 * RDB: 0 MB of memory used by copy-on-write
[11419] 20 May 19:32:08.131 * Background saving terminated with success
[11419] 20 May 19:37:09.055 * 10 changes in 300 seconds. Saving...
[11419] 20 May 19:37:09.055 * Background saving started by pid 16314
[16314] 20 May 19:37:09.067 * DB saved on disk
[16314] 20 May 19:37:09.068 * RDB: 0 MB of memory used by copy-on-write
[11419] 20 May 19:37:09.156 * Background saving terminated with success

[Lingyong Zhang]

@Guiri I see, I have solved.
But I have some problems, I don't know which database I should use.
mongo or redis ?