Internal Server Error while browsing

When I browse my site Internal Server Error show!
sudo service mysql status

Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2021-12-14 21:36:19 UTC; 1min 56s ago
Docs: man:mysqld(8)
Process: 1564 ExecStartPre=/usr/bin/install -m 755 -o mysql -g root -d /var/run/mysqld (code=exited, status=0/SUCCESS)
Process: 1573 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)
Process: 1577 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= || VAR=cd /usr/bin/..; /usr/bin/galera_recovery; [ $? -eq 0 ] && systemctl set-environment _WSREP_START_POSITION=$VAR ||>
Process: 1665 ExecStartPost=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)
Process: 1667 ExecStartPost=/etc/mysql/debian-start (code=exited, status=0/SUCCESS)
Main PID: 1633 (mysqld)
Status: “Taking your SQL requests now…”
Tasks: 32 (limit: 1136)
Memory: 113.0M
CGroup: /system.slice/mariadb.service
└─1633 /usr/sbin/mysqld

Dec 14 21:36:18 Andyyy mysqld[1633]: 2021-12-14 21:36:18 0 [Note] /usr/sbin/mysqld (mysqld 10.3.32-MariaDB-0ubuntu0.20.04.1) starting as process 1633 …
Dec 14 21:36:19 Andyyy systemd[1]: Started MariaDB 10.3.32 database server.
Dec 14 21:36:19 Andyyy /etc/mysql/debian-start[1669]: Upgrading MySQL tables if necessary.
Dec 14 21:36:19 Andyyy /etc/mysql/debian-start[1672]: Looking for ‘mysql’ as: /usr/bin/mysql
Dec 14 21:36:19 Andyyy /etc/mysql/debian-start[1672]: Looking for ‘mysqlcheck’ as: /usr/bin/mysqlcheck
Dec 14 21:36:19 Andyyy /etc/mysql/debian-start[1672]: Version check failed. Got the following error when calling the ‘mysql’ command line client
Dec 14 21:36:19 Andyyy /etc/mysql/debian-start[1672]: ERROR 1045 (28000): Access denied for user ‘root’@‘localhost’ (using password: NO)
Dec 14 21:36:19 Andyyy /etc/mysql/debian-start[1672]: FATAL ERROR: Upgrade failed
Dec 14 21:36:19 Andyyy /etc/mysql/debian-start[1682]: Checking for insecure root accounts.
Dec 14 21:36:19 Andyyy debian-start[1685]: ERROR 1045 (28000): Access denied for user ‘root’@‘localhost’ (using password: NO)

it was working fine i don’t know what happened! also i can access mysql root …
i tried alot of thing also

but didn’t work.

most common line at logs file
pymysql.err.OperationalError: (2003, “Can’t connect to MySQL server on ‘’ ([Errno 111] Connection refused)”)

I’m using Ubuntu 20 1 vCPU 1GB Ram

df -h
Filesystem Size Used Avail Use% Mounted on
udev 474M 0 474M 0% /dev
tmpfs 99M 1.2M 97M 2% /run
/dev/vda1 25G 6.2G 18G 26% /
tmpfs 491M 0 491M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 491M 0 491M 0% /sys/fs/cgroup
/dev/loop0 62M 62M 0 100% /snap/core20/1270
/dev/loop2 68M 68M 0 100% /snap/lxd/21835
/dev/loop1 62M 62M 0 100% /snap/core20/1081
/dev/loop3 68M 68M 0 100% /snap/lxd/21545
/dev/loop4 33M 33M 0 100% /snap/snapd/13170
/dev/loop5 44M 44M 0 100% /snap/snapd/14295
/dev/vda15 105M 5.2M 100M 5% /boot/efi
tmpfs 99M 20K 99M 1% /run/user/123
tmpfs 99M 0 99M 0% /run/user/0

total used free shared buff/cache available
Mem: 1004844 791052 61356 4392 152436 59968
Swap: 0 0 0

please guide me

also some time gave me this

# 504 Gateway Time-out
nginx/1.18.0 (Ubuntu)


One gig of RAM is not going to run ERPNext very well, 2 or more would be better. That being said, if it was working properly at one point and then stopped , was there an update or some other modification performed that preceded the error? What does bench setup nginx and bench build return? does bench mariadb open a session successfully?

Is 1GB RAM cause this error?
Actually I created another site using
bench new-site
I use my new site then the error shows , before that I don’t face any Time-out or ISE. Just slow browsing.

bench setup nginx
nginx.conf already exists and this will overwrite it. Do you want to continue? [y/N]: N

I’m sure about my nginx.conf , after I create new site I generate new config and backup the old one.

bench mariadb
Yes open session successfully.

bench build return :

bench build
Retrieving assets…

:heavy_check_mark: Downloaded Frappe assets from

Extracting assets…

:heavy_check_mark: Restored js/data_import_tools.min.js
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/barcode_scanner.min.js
:heavy_check_mark: Restored js/form.min.js
:heavy_check_mark: Restored js/bootstrap-4-web.min.js
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/report.min.js
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/list.min.js
:heavy_check_mark: Restored js/frappe-recorder.min.js
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/checkout.min.js
:heavy_check_mark: Restored js/desk.min.js
:heavy_check_mark: Restored js/libs.min.js
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/web_form.min.js
:heavy_check_mark: Restored js/dialog.min.js
:heavy_check_mark: Restored js/chat.js
:heavy_check_mark: Restored js/user_profile_controller.min.js
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/moment-bundle.min.js
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored js/frappe-web.min.js
:heavy_check_mark: Restored js/control.min.js
:heavy_check_mark: Restored js/
:heavy_check_mark: Restored css/printview.css
:heavy_check_mark: Restored css/frappe-web-b4.css
:heavy_check_mark: Restored css/web_form.css
:heavy_check_mark: Restored css/rollup.manifest.css
:heavy_check_mark: Restored css/login.css
:heavy_check_mark: Restored css/report.min.css
:heavy_check_mark: Restored css/email.css
:heavy_check_mark: Restored css/frappe-chat-web.css
:heavy_check_mark: Restored css/desk.min.css
:heavy_check_mark: Restored css-rtl/printview.css
:heavy_check_mark: Restored css-rtl/frappe-web-b4.css
:heavy_check_mark: Restored css-rtl/web_form.css
:heavy_check_mark: Restored css-rtl/login.css
:heavy_check_mark: Restored css-rtl/report.min.css
:heavy_check_mark: Restored css-rtl/email.css
:heavy_check_mark: Restored css-rtl/frappe-chat-web.css
:heavy_check_mark: Restored css-rtl/desk.min.css
Linking /home/roman/frappe-bench/apps/frappe/node_modules to ./assets/frappe/nodLinking /home/roman/frappe-bench/apps/erpnext/node_modules to ./assets/erpnext/n✔ Application Assets Linked

yarn run v1.22.17
$ FRAPPE_ENV=production node rollup/build.js --skip_frappe
Production mode
:heavy_check_mark: Built js/moment-bundle.min.js
:heavy_check_mark: Built js/libs.min.js

Building erpnext assets…

error Command failed with exit code 137.
info Visit for documentation about this command.
Traceback (most recent call last):
File “/usr/lib/python3.8/”, line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File “/usr/lib/python3.8/”, line 87, in _run_code
exec(code, run_globals)
File “/home/roman/frappe-bench/apps/frappe/frappe/utils/”, line 104, in
File “/home/roman/frappe-bench/apps/frappe/frappe/utils/”, line 19, in main
File “/home/roman/frappe-bench/env/lib/python3.8/site-packages/click/”, line 829, in call
return self.main(*args, **kwargs)
File “/home/roman/frappe-bench/env/lib/python3.8/site-packages/click/”, line 782, in main
rv = self.invoke(ctx)
File “/home/roman/frappe-bench/env/lib/python3.8/site-packages/click/”, line 1259, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/roman/frappe-bench/env/lib/python3.8/site-packages/click/”, line 1259, in invoke
return process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/roman/frappe-bench/env/lib/python3.8/site-packages/click/”, line 1066, in invoke
return ctx.invoke(self.callback, **ctx.params)
File “/home/roman/frappe-bench/env/lib/python3.8/site-packages/click/”, line 610, in invoke
return callback(*args, **kwargs)
File “/home/roman/frappe-bench/apps/frappe/frappe/commands/”, line 44, in build
File “/home/roman/frappe-bench/apps/frappe/frappe/”, line 248, in bundle
frappe.commands.popen(command, cwd=frappe_app_path, env=get_node_env(), raise_err=True)
File “/home/roman/frappe-bench/apps/frappe/frappe/commands/”, line 93, in popen
raise subprocess.CalledProcessError(return
, command)
subprocess.CalledProcessError: Command ‘/usr/bin/yarn run production --skip_frappe’ returned non-zero exit status 137.

A quick Google of

non-zero exit status 137

suggests a lack of sufficient memory…

check mariadb is active or not
sudo service mysql status

if it is dead start the mysql
sudo service mysql start

now mariadb will be active and you can able connect