Error Memcached WSGI

Calby · November 2, 2017, 10:20am

Do I need to create that file? Or just change the line?
It’s not clear for me if should create that file or give seafile user any new rights regarding Tmp dir.

@marcusm

marcusm · November 2, 2017, 4:59pm

Does this not work for you?

LOCATION’: ‘127.0.0.1:11211’,

Please see: https://manual.seafile.com/deploy/add_memcached.html

Calby · November 2, 2017, 6:02pm

Did install
sudo apt-get install libmemcached-dev zlib1g-dev

Also did install
sudo -H pip install pylibmc
sudo -H pip install django-pylibmc

Added this to seahub_settings.py

CACHES = {
    'default': {
        'BACKEND': 'django_pylibmc.memcached.PyLibMCCache',
        'LOCATION': '127.0.0.1:11211',
    }
}

but I still get this error messages in

2017-11-02 18:58:18,269 [ERROR] django.pylibmc:132 get MemcachedError: error 47 from memcached_get(:1:TEXT_PREVIEW_EXT): (0x7fdba8005f90) SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETR$
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django_pylibmc/memcached.py", line 130, in get
    return super(PyLibMCCache, self).get(key, default, version)
  File "/home/seafile/nohatech/seafile-server-6.2.2/seahub/thirdpart/Django-1.8.18-py2.7.egg/django/core/cache/backends/memcached.py", line 84, in get
    val = self._cache.get(key)
ServerDown: error 47 from memcached_get(:1:TEXT_PREVIEW_EXT): (0x7fdba8005f90) SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETRY,  host: 127.0.0.1:11211 -> libmemcached/get.cc:314

marcusm · November 2, 2017, 6:20pm

Did you install memcached?

sudo apt-get install memcached

Calby · November 2, 2017, 6:38pm

Well I did not, I did’ent find it in the manual that I should install that so I dident know.

But now everything seem to work great
No error in seahub.log anyway

whats the difference with /tmp/memcached.sock and LOCATION’: ‘127.0.0.1:11211’, ?

I’m running the latest Seafile CE 6.2.2 what should I use?

Did send in a PR about it troug github so lets hope that the dev’s are changing so memcached and zlib1g-dev are in the manual also added the -H flag for the pip installations.

Calby · November 3, 2017, 8:10am

I did read that best practices was to use ‘LOCATION’: ‘/tmp/memcached.sock’, but do I need to install something else or create the file? Or can I just change the line in the configuration?

jobenvil · November 3, 2017, 9:38am

Yes, memcached configuration file must be adapted to work on socket instead of port.

Calby · November 3, 2017, 9:39am

Do you have any instructions how to do that?

jobenvil · November 3, 2017, 9:48am

Search in Google for memcached socket configuration or similars.

gauburtin · November 11, 2017, 11:07am

HI,

just to let you know, on Debian 8 i had to install all this :

sudo apt-get install python-dev
sudo apt-get install libmemcached-dev zlib1g-dev
sudo pip install pylibmc
sudo pip install django-pylibmc

Memcache seems to work fine on WCGI with this config (i looked at the manua)

CACHES = {
    'default': {
        'BACKEND': 'django_pylibmc.memcached.PyLibMCCache',
        'LOCATION': '127.0.0.1:11211',
    }
}

I never managed to make memcache work before …

Regards,

Gautier

Calby · November 11, 2017, 3:37pm

Hi,
Use unix_socket instead it’s 30% faster.
You don’t need to install anything more just change the configs.
Read how to do it in the link in this post, look at the add memcache section.

You just need to change memcache.conf and the seahub_settings.py

github.com

NohaTech/Seafile-best-practices-for-Ubuntu/blob/master/NohaTech-Seafile-Guide-English.md

The guide have moved to the following address, and it has been updated also!
https://nohatech.se/how-to-setup-seafile-with-ubuntu-server-16-04-lts/

gauburtin · November 12, 2017, 5:47pm

HI, I tried your confg and i have the errors in seahub.log

2017-11-12 17:41:19,969 [ERROR] django.pylibmc:132 get MemcachedError: error 26 from memcached_get(:1:CUR_TOPINFO): Broken pipe
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django_pylibmc/memcached.py", line 130, in get
    return super(PyLibMCCache, self).get(key, default, version)
  File "/home/cc/seafile/seafile-pro-server-6.2.0/seahub/thirdpart/Django-1.8.18-py2.7.egg/django/core/cache/backends/memcached.py", line 84, in get
    val = self._cache.get(key)
Error: error 26 from memcached_get(:1:CUR_TOPINFO): Broken pipe
2017-11-12 17:41:20,361 [ERROR] django.pylibmc:132 get MemcachedError: error 26 from memcached_get(:1:CUR_TOPINFO): Broken pipe
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django_pylibmc/memcached.py", line 130, in get
    return super(PyLibMCCache, self).get(key, default, version)
  File "/home/cc/seafile/seafile-pro-server-6.2.0/seahub/thirdpart/Django-1.8.18-py2.7.egg/django/core/cache/backends/memcached.py", line 84, in get
    val = self._cache.get(key)
Error: error 26 from memcached_get(:1:CUR_TOPINFO): Broken pipe

The seahub server is running and it does it fast.
The file /var/run/memcached.sock exists.
Why setting the process to be run by root ?

Regards,

Gautier

Calby · November 12, 2017, 7:20pm

Have you also looked so you have everything that you need installed?
It’s some packeage that are needed.

I’m on my mobile now but take a look in the beginning of my guide to se what package that are needed.

Your running it as root because that I have putted it in /vat/run folder.

If you want it to run as an other user you need to change the permissions for the socket file.

Sorry for misspelling etc I’m on my cellphone until tomorrow.

Edit:
So you have this installed?
Sudo apt-get install python-memcache memcached libmemcached-dev zlib1g-dev

Also
sudo -H pip install pillow moviepy pylibmc django-pylibmc -y

gauburtin · November 12, 2017, 7:55pm

Yes i have.
But it seems that the log does not trace any more error about memcache.
I’ll keep you informed if it still occurs.

Regards
Gautier

Calby · November 12, 2017, 8:40pm

Now when your mention it, did you stop Seafile before you did change memcached?
./seafile.sh stop and also ./seahub.sh stop?
I guess you did not stop memcached service either before you did make the changes?
I need to add that to the guide, that you need to stop Memcached service before changing the configuration file for memcached.

So this is the explanation, you need to stop memcached before your doing the changes and after you need to start memcached and also reload memcached.

My advice now is that you reboot the server and then take a look so everything looks good in the configuration files for memcached etc.

Edit:
I have now edited the github also I did try to do the exact same thing that you did without using “sudo service memcached stop” and I did get the same error in the log-file as you.

So it should not be a issue as long as you reboot your server so you know that the new configuration are running or, using sudo service memcached status then you should se if it using unix_sock

gauburtin · November 12, 2017, 10:23pm

● memcached.service - memcached daemon
   Loaded: loaded (/lib/systemd/system/memcached.service; enabled)
   Active: active (running) since dim. 2017-11-12 18:40:50 CET; 4h 40min ago
 Main PID: 498 (memcached)
   CGroup: /system.slice/memcached.service
           └─498 /usr/bin/memcached -m 64 -u root -s /var/run/memcached.sock -a 0766 -M

Everything looks fine now.

Regards,

Gautier

gauburtin · November 13, 2017, 12:55pm

Hi,

I still have these errors from time to time, but it looks like it is not related to browsing on seahub.

Is there any way to diagnose them ?

2017-11-13 12:39:00,261 [ERROR] django.pylibmc:132 get MemcachedError: error 26 from memcached_get(:1:CUR_TOPINFO): Broken pipe
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django_pylibmc/memcached.py", line 130, in get
    return super(PyLibMCCache, self).get(key, default, version)
  File "/home/cc/seafile/seafile-pro-server-6.2.0/seahub/thirdpart/Django-1.8.18-py2.7.egg/django/core/cache/backends/memcached.py", line 84, in get
    val = self._cache.get(key)
Error: error 26 from memcached_get(:1:CUR_TOPINFO): Broken pipe

regards

Calby · November 13, 2017, 1:33pm

One quastion have you tried to update/upgrade your system and reboot?
Sudo apt-get update && sudo apt-get upgrade -y

and then do a sudo reboot

Cisco · November 13, 2017, 1:43pm

hi
I am on debian 9 and I meet the same error as you Gautier I have no idea of the origin of these errors. errors appear using the seafile interface on the web browser

2017-11-13 07:34:59,397 [ERROR] django.pylibmc:132 get MemcachedError: error 26 from memcached_get(:1:CUR_TOPINFO): Broken pipe
Traceback (most recent call last):
File “/usr/local/lib/python2.7/dist-packages/django_pylibmc/memcached.py”, line 130, in get
return super(PyLibMCCache, self).get(key, default, version)
File “/home/cloud/seafile-pro-server-6.2.0/seahub/thirdpart/Django-1.8.18-py2.7.egg/django/core/cache/backends/memcached.py”, line 84, in get
val = self._cache.get(key)
Error: error 26 from memcached_get(:1:CUR_TOPINFO): Broken pipe

Calby · November 13, 2017, 1:58pm

It maybe are some error that are isloated on 6.2.0 version of Seafile, I’m using 6.2.2

Can you try to run this command sudo -H pip install pylibmc --upgrade and also sudo -H pip install django-pylibmc --upgrade

I was thinking if you have a old version of this two.